HG/T 2429-1993 Water treatment agent acrylic acid-acrylic acid ester copolymer
Some standard content:
Chemical Industry Standard of the People's Republic of China
Acrylic acid-acrylic ester copolymer
Water treatment agent
1 Subject content and scope of application
HG/T 2429-- 93
This standard specifies the scope of application, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and safety requirements of acrylic acid-acrylic ester copolymer products
This standard applies to binary or multi-component copolymers prepared from acrylic acid and various acrylic esters (methyl acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate). This product is mainly used as a dispersed scale inhibitor for industrial water treatment. Structural formula: binary copolymer
ECH2CH3,ECH2-CH3
terpolymer
ECH2-CH3,ECH2--CH3,ECH2—-CH3,COOH
wherein R:--CH2—CH2;—CH2—
CH—CH
m>>n,p
reference standard
GH 191
Packaging, storage and transportation pictorial symbols
GHB601 Preparation of standard solution for titration analysis of chemical reagents: Preparation of preparations and products used in chemical reagent test methodsGB603
Expression and determination methods of limit valuesGB1250
GB6682
Specifications and test methods for water used in analytical laboratories3 Product classification
Class A: Acrylic acid-methyl acrylate binary copolymersClass B: Resinic acid-hydroxyalkyl acrylate binary or multi-polymers4 Technical requirements
4.1 Appearance
Class A is a colorless or light yellow viscous liquid;
Class B is a colorless or yellow viscous liquid.
Approved by the Ministry of Chemical Industry of the People's Republic of China on April 22, 1993 c=o
Implementation on January 1, 1994
4.2 Technical conditions
HG/T2429-93
Acrylic acid-acrylate copolymers shall meet the requirements of Table 1: Table 1 Technical requirements for acrylic acid-acrylate copolymers
Density. (20 () #/em
P value. 0.0% aqueous solution of sample)
Volume content. % Www.bzxZ.net
Free monomer, (calculated as acrylate) %
Limiting viscosity, dl./g (30℃)
5Test method
Qualified product
2.50±0.50
30.0±2.0
27.0±1.0
Qualified product
7.50±1.00
30.0±2.0
0.065~0.095
27.0±1.0
Except for special provisions in the test method, only analytical reagents and the specifications of grade 3 water in GB6682 should be used. The reference material should use the reference reagent.
The standard solution, preparation and product required in the test shall be prepared in accordance with the provisions of GB601 and GB603 unless otherwise specified. 5.1 Determination of density
5.1.1 Summary of method
Read the density of the sample from the depth of the hydrometer immersed in the sample when it reaches equilibrium. 5.1.2 Instruments and equipment
5.1.2.1 Density meter: graduation value is 0.001g/cm; 5.1.2.2 Glass measuring cylinder: 250ml.;
5.1.2.3 Constant temperature water bath: temperature controlled at 20°C ± 1°C. 5.1.3 Analysis steps
Inject the sample to be tested into a clean and dry measuring cylinder without bubbles. Place the measuring cylinder in a constant temperature water bath at 20℃. After the sample temperature is constant at 20℃, slowly put the clean and dry densitometer into the sample. The lower end of the densitometer should be more than 2cm away from the bottom of the cylinder and should not touch the cylinder wall. The liquid on the part of the upper end of the densitometer exposed outside the liquid surface should not exceed 2-3 scales. After the densitometer is stable in the sample, read the scale of the densitometer to get the density of the sample:
5.2 Determination of pH value
5.2.1 Summary of method
The activity of hydrogen ions in the sample is determined by the potentiometric method. 5.2.2 Instruments and equipment
5.2.2.1 Acid pH meter: accuracy is 0.02pH; 5.2.2.2 Electrodes: glass electrode and calomel electrode. 5.2.3 Analysis steps
Weigh 1.0g of sample into a beaker, add water to dissolve, dilute with water to 100mL, stir well and set aside. Insert the pH electrode and glass electrode into the prepared test solution. After 5 minutes, read the pH value on the positioned acidometer, which is the pH value of the sample.
5.3 Determination of solid content
5.3.1 Summary of method
Dry the sample at a certain temperature to remove moisture. The amount of residue is the solid content of the sample. 126
5.3.2 Instruments and equipment
5.3.2.1 Oven: temperature The temperature is controlled at 120C±2C; 5.3.2.2 Weighing bottle: $50mmX×30mm. 5.3.3 Analysis steps
HG/T2429-93
Weigh about 1% of the sample with an accuracy of 0.0002g into a weighing bottle that has been kept constant at 120℃, put it into an oven, heat it from room temperature, bake it at 120C±1C for 3.5h, take it out, cool it, and weigh it. Bake it for another 0.5h until the difference between the two weighings is no more than 0.0001g. 5.3.4 Expression of analysis results
The solid content X1 expressed as mass percentage is calculated according to formula (1): Xm×100.
Where m is the mass of the sample before drying, g;
m-mass of the sample after drying + g.
5.3.5 Allowable difference
The arithmetic mean of the parallel determination results shall be taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.35%, and the absolute difference of the determination results of different laboratories shall not exceed 0.65%. 5.4 Determination of free monomer content
5.4.1 Summary of the method
The free monomer (acrylic acid or acrylate) contains a double bond in its structure, which can react with bromine. The free monomer content is determined based on this characteristic reaction.
Reaction formula:
5Br2+BrO+6H+—3Br2+3H0
CH2-CH--COOH+Br CHBrCHBrCOOHBr2+21-2Br-12
12--2S20- 21 -+S,0%
5.4.2 Reagents and materials
5.4.2.1 Hydrochloric acid (GB622): 1+1 solution; 5.4.2.2 Potassium iodide (GB1272): 100g/L solution 5.4.2.3 Bromine c (1/6KBrO3) = m0.2mol/L standard catalyst solution, no need for calibration; Weigh 5.6g potassium bromate and 50g potassium bromide and dissolve them in water, transfer to 1.000nl. volumetric flask with water to dilute to the scale and shake for later use. Store in a brown bottle.
5.4.2.4 Starch: 5g/L solution:
5.4.2.5 Sodium thiosulfate (GB637): c(Na2S2O) 0.1mol/L standard titration solution 5.4.2.6 Sodium hydroxide (GB629): 100g/L solution. 5.4.3 Analysis steps
5.4.3.1 Preparation and determination of test solution for type A samples Weigh 2-5g of sample with an accuracy of 0.0002g into a 100ml volumetric flask previously filled with sodium hydroxide solution (5.4.2.6) (the amount is 1ml per gram of sample), dilute with water to the mark, shake well and set aside. Pipette 10.0ml of the test solution into a 500ml iodine volumetric flask pre-filled with 15.0ml of L-bromine standard solution (5.4.2.3), quickly add 5ml of hydrochloric acid solution (5.4.2.1), immediately cover the bottle stopper, add water to seal. Shake well, place in a tank, and react for 30 minutes. Quickly add 10ml of potassium iodide solution (5.4.2.2), add water to seal, shake well, and place in a dark place for 10 minutes. Take it out, immediately add 150ml of water, and titrate with sodium thiosulfate standard titration solution (5.4.2.5) until the solution turns light yellow, add 2ml of starch solution (5.4.2.4) and continue titrating until the blue color disappears, which is the end point, and do a blank test at the same time.
5.4.3.2 Determination of Class 3 Samples
HG/T2429—93
Weigh 2~5g of sample with an accuracy of 0.0002g into a 500mL iodine volumetric flask pre-filled with 10.0mL of bromine standard solution (5.4.2.3), quickly add 5ml of hydrochloric acid solution (5.4.2.1), immediately cover the bottle stopper, add water to seal, shake well, place in a dark place, and react for 30min. The following steps are as follows (5.4.3.1) from "quickly add 10ml.5.4.4 Expression of analysis results
The amount of free monomer (in terms of acrylic acid) expressed as a mass percentage is calculated by formula (2): X2+ (Vo-V)Xex0. 036 03
Wherein: - the volume of sodium thiosulfate standard titration solution consumed in the blank test, mlV- the volume of sodium thiosulfate standard titration solution consumed when measuring the sample, mL- the actual concentration of sodium thiosulfate standard titration solution, mol/L; m the mass of the sample, g.
0. 036 03-
The mass of acrylic acid in grams equivalent to 1.00mL of sodium thiosulfate standard titration solution [c (Na2S,O3) -1.000mol/L.
5.4.5 Allowable Difference
The arithmetic mean of the parallel determination results shall be taken as the determination result. The absolute difference of the parallel determination results of Class A products shall not be greater than 0.30%; the absolute difference of the determination results of different laboratories shall not be greater than 0.40%
The absolute difference of the parallel determination results of Class B products shall not be greater than 0.10%; the absolute difference of the determination results of different laboratories shall not be greater than Greater than 0.20.
5.5 Determination of limiting viscosity
5.5.1 Method summary
The sample is dissolved in sodium thiocyanate solution and the limiting viscosity is determined by the single-point method. 5.5.2 Reagents and materials
5.5.2.1 Sodium oxychloride (GB629): 80g/solution 5.5.2.2 Sodium thiocyanate (GB1268): 101g/L solution. 5.5.3 Instruments and equipment
5.5.3.1 Ubbelohde viscometer (as shown in Figure 1): solvent outflow time ≥100s; 128
HG/T 2429--93
Figure 1 Ubelohde viscometer
A--Lower storage ball, outer diameter 26mmB suspended horizontal ball;C-timing ball, volume 3.0ml. (±5%);D-upper storage ball;E, F timing mark;G, H-filling mark:L-mounting tube, outer diameter 11mm:M-lower outlet tube, outer diameter 6mm?N-upper outlet tube, outer diameter 7mm;P connecting tube, inner diameter 6.0mm (±5%)R-working capillary inner diameter 0.55mm (±2%) Note: The tolerance of each tube length and ball size is ±10% or ±10mm, whichever is the smallest. 5.5. 3.2 Constant water bath: temperature controlled at 30℃±1℃; 5.5.3.3 Glass sintered funnel: G3
5.5.4 Analysis steps
5.5.4.1 Determination of effluent time of sodium thiocyanate solution (5.5.2.2) Place the clean and dry Ubbelohde viscometer (5.5.3.1) directly in a constant temperature water bath (5.5.3.2) at 30℃±1℃, add the sodium thiocyanate solution (5.5.2.2) filtered through the G3 sintered glass funnel (5.5.3.4) into the viscometer (5.5.3.1), and keep the temperature constant for 10~~15min until the liquid level reaches between the G and H scales. Use an ear bulb to absorb sodium thiocyanate solution above the scale mark C on the upper end of the sphere, and use a stopwatch to measure the time for the sodium thiocyanate solution to flow through the E and F engravings. Measure three times in a row, and the error should not exceed 0.2s. Take the average value and express it as t(s). 5.5.4.2 Preparation and determination of test solution
Weigh 10g of the sample in culture III, and neutralize the sample with sodium hydroxide solution (5.5.2.1) to make its pH value 9. It can be measured with precision pH test paper. Put it in an oven, heat it from room temperature, and bake it at 120℃ to constant weight. Weigh 0.8-1.0g of the dry sample with an accuracy of 0.0002g, dissolve it with sodium thiocyanate solution (5.5.2.2), transfer it to a 100mL volumetric flask, and dilute it to the scale, shake it well, and set aside. Add the test solution filtered through the G sintered funnel into the clean and dry Ubbelohde viscometer (5.5.3.1) until the liquid level reaches between G and H. The following steps are carried out according to (5.5.4.1) starting from "constant temperature 10-15min*" until it does not exceed 0.2s". Take the average value and express it as t(s).
5.5.5 Expression of analysis results
Express the limiting viscosity X of the sample in dl./g: Calculate according to formula (3): X
t = specific viscosity;
Wu Zhong: 7p=
- relative viscosity; || tt||…Test concentration·d/d
2(nsp-lnn)
-Time for sodium thiocyanate solution to flow through viscometer E, time for test solution to flow through viscometer E, F scale, S. 5.5.6 Allowable difference
The absolute difference of the test results of different test plugs should not exceed 0.01dL/g. 6 Inspection rules
6.1 The quality inspection department of the manufacturer shall inspect the quality of olefin-acrylate products according to the test methods and inspection rules specified in this standard. The manufacturer shall ensure that all products shipped meet the requirements of this standard. Whose requirements. 6.2 Each batch of products leaving the factory should be accompanied by a quality certificate in a certain format. Its contents include: manufacturer name, product name, grade, batch number, production period, net quantity, proof that the product quality complies with this standard and the number of this standard. 6.3 The user has the right to conduct quality inspection on the received products in accordance with the provisions of this standard to verify whether its quality meets the requirements of this standard. 6.4 The manufacturer should inspect the products leaving the factory in batches, and each signed product is 1 batch. 6.5 Sampling method: The number of sampling barrels shall be selected according to the provisions of Table 2. Table 2 Provisions for selecting the number of sampling barrels
Total number of packaging barrels||tt| |82~101
102~125
Select the minimum number of barrels
Total number of barrels
When sampling, insert a glass tube or plastic tube into the barrel, stir evenly, take out the sample at 2/3, and the sample taken out shall not be less than 100mL. The obtained sample is placed in a clean and dry bottle and mixed evenly. The uniform sample is placed in two clean and dry bottles and sealed. Label the bottle. Indicate the manufacturer name, product name, batch number, production date, sampling date and name of the sampler, etc. One bottle is inspected by the quality inspection department 130
HG/T 2429—93
Test, the other bottle is a reserved sample for re-testing and arbitration, the retention period is six months. 6.5 If one requirement of the test result does not meet the requirements of this standard, the sample should be taken from the packaging barrel with twice the amount and tested again. If one of the results still does not meet the requirements of this standard, the whole batch of products cannot be accepted. 6.6 When the supply and demand parties have disputes over product quality and need arbitration, they can handle it in accordance with the provisions of the "Interim Methods for National Product Quality Arbitration Inspection".
6.7 Determine whether the test results meet the standards according to the rounded value comparison method specified in GB1250. 7 Marking, packaging, transportation, storage
7.1 On each package, there should be a clear and firm mark, the content of which is: manufacturer name, product name, trademark, grade, batch number. Production date and number of this standard. And apply the "upward" mark specified in GB191. 7.2 Acrylic acid-acrylate products are packaged in polyethylene barrels, with a net weight of 25kg per barrel. Or packaged according to user requirements. 7.3 Acrylic acid-acrylate products can be transported by road, rail or water. They should be covered during transportation and prevent collision during loading, unloading and transportation.
7.4 Acrylic acid-acrylate products should be stored in a cool and dry place for one year. 8 Safety requirements
When handling acrylic acid-acrylate products, operators should wear protective gloves to avoid direct contact. If any material escapes, it should be immediately rinsed with plenty of water. Additional notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Tianjin Chemical Industry Research Institute. This standard was drafted by Nanjing Chemical Engineering Design Institute. The main drafters of this standard are Lin Zhuxin, Hou Jinping, Hu Jingwen and Fan Rong. 13110%; the absolute difference between the test results of different laboratories should not exceed 0.20.
5.5 Determination of limiting viscosity
5.5.1 Method summary
The sample is dissolved in sodium thiocyanate solution and the limiting viscosity is determined by the single-point method. 5.5.2 Reagents and materials
5.5.2.1 Sodium oxychloride (GB629): 80g/solution 5.5.2.2 Sodium thiocyanate (GB1268): 101g/L solution. 5.5.3 Instruments and equipment 5.5.3.1 Ubbelohde viscometer (as shown in Figure 1): solvent outflow time ≥ 100s; 128 HG/T 2429--93 Figure 1 Ubbelohde viscometer A--Lower storage ball, outer diameter 26mm B Suspended horizontal ball C-Timing ball, volume 3.0ml. (±5%) D-Upper storage ball E, F timing markings G, H-Filling markings L-Releasing tube, outer diameter 11mm M-Lower outlet tube, outer diameter 6mm N-Upper outlet tube, outer diameter 7mm P Connecting tube, inner diameter 6.0mm (±5%) R-Working capillary inner diameter 0.55mm (±2%) Note: The tolerance of each tube length and spherical size is ±10% or ±10mm, whichever is the smallest. 5.5.3.2 Constant water bath: temperature controlled at 30℃±1℃; 5.5.3.3 Glass sintered funnel: G3
5.5.4 Analysis steps
5.5.4.1 Determination of effluent time of sodium thiocyanate solution (5.5.2.2) Place the clean and dry Ubbelohde viscometer (5.5.3.1) directly in a constant temperature water bath (5.5.3.2) at 30℃±1℃, add the sodium thiocyanate solution (5.5.2.2) filtered through the G3 sintered glass funnel (5.5.3.4) into the viscometer (5.5.3.1), and keep the temperature constant for 10~~15min until the liquid level reaches between the G and H scales. Use an ear bulb to absorb sodium thiocyanate solution above the scale mark C on the upper end of the sphere, and use a stopwatch to measure the time for the sodium thiocyanate solution to flow through the E and F engravings. Measure three times in a row, and the error should not exceed 0.2s. Take the average value and express it as t(s). 5.5.4.2 Preparation and determination of test solution
Weigh 10g of the sample in culture III, and neutralize the sample with sodium hydroxide solution (5.5.2.1) to make its pH value 9. It can be measured with precision pH test paper. Put it in an oven, heat it from room temperature, and bake it at 120℃ to constant weight. Weigh 0.8-1.0g of the dry sample with an accuracy of 0.0002g, dissolve it with sodium thiocyanate solution (5.5.2.2), transfer it to a 100mL volumetric flask, and dilute it to the scale, shake it well, and set aside. Add the test solution filtered through the G sintered funnel into the clean and dry Ubbelohde viscometer (5.5.3.1) until the liquid level reaches between G and H. The following steps are carried out according to (5.5.4.1) starting from "constant temperature 10-15min*" until it does not exceed 0.2s". Take the average value and express it as t(s).
5.5.5 Expression of analysis results
Express the limiting viscosity X of the sample in dl./g: Calculate according to formula (3): X
t = specific viscosity;
Wu Zhong: 7p=
- relative viscosity; || tt||…Test concentration·d/d
2(nsp-lnn)
-Time for sodium thiocyanate solution to flow through viscometer E, time for test solution to flow through viscometer E, F scale, S. 5.5.6 Allowable difference
The absolute difference of the test results of different test plugs should not exceed 0.01dL/g. 6 Inspection rules
6.1 The quality inspection department of the manufacturer shall inspect the quality of olefin-acrylate products according to the test methods and inspection rules specified in this standard. The manufacturer shall ensure that all products shipped meet the requirements of this standard. Whose requirements. 6.2 Each batch of products leaving the factory should be accompanied by a quality certificate in a certain format. Its contents include: manufacturer name, product name, grade, batch number, production period, net quantity, proof that the product quality complies with this standard and the number of this standard. 6.3 The user has the right to conduct quality inspection on the received products in accordance with the provisions of this standard to verify whether its quality meets the requirements of this standard. 6.4 The manufacturer should inspect the products leaving the factory in batches, and each signed product is 1 batch. 6.5 Sampling method: The number of sampling barrels shall be selected according to the provisions of Table 2. Table 2 Provisions for selecting the number of sampling barrels
Total number of packaging barrels||tt| |82~101
102~125
Select the minimum number of barrels
Total number of barrels
When sampling, insert a glass tube or plastic tube into the barrel, stir evenly, take out the sample at 2/3, and the sample taken out shall not be less than 100mL. The obtained sample is placed in a clean and dry bottle and mixed evenly. The uniform sample is placed in two clean and dry bottles and sealed. Label the bottle. Indicate the manufacturer name, product name, batch number, production date, sampling date and name of the sampler, etc. One bottle is inspected by the quality inspection department 130
HG/T 2429—93
Test, the other bottle is a reserved sample for re-testing and arbitration, the retention period is six months. 6.5 If one requirement of the test result does not meet the requirements of this standard, the sample should be taken from the packaging barrel with twice the amount and tested again. If one of the results still does not meet the requirements of this standard, the whole batch of products cannot be accepted. 6.6 When the supply and demand parties have disputes over product quality and need arbitration, they can handle it in accordance with the provisions of the "Interim Methods for National Product Quality Arbitration Inspection".
6.7 Determine whether the test results meet the standards according to the rounded value comparison method specified in GB1250. 7 Marking, packaging, transportation, storage
7.1 On each package, there should be a clear and firm mark, the content of which is: manufacturer name, product name, trademark, grade, batch number. Production date and number of this standard. And apply the "upward" mark specified in GB191. 7.2 Acrylic acid-acrylate products are packaged in polyethylene barrels, with a net weight of 25kg per barrel. Or packaged according to user requirements. 7.3 Acrylic acid-acrylate products can be transported by road, rail or water. They should be covered during transportation and prevent collision during loading, unloading and transportation.
7.4 Acrylic acid-acrylate products should be stored in a cool and dry place for one year. 8 Safety requirements
When handling acrylic acid-acrylate products, operators should wear protective gloves to avoid direct contact. If any material escapes, it should be immediately rinsed with plenty of water. Additional notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Tianjin Chemical Industry Research Institute. This standard was drafted by Nanjing Chemical Engineering Design Institute. The main drafters of this standard are Lin Zhuxin, Hou Jinping, Hu Jingwen and Fan Rong. 13110%; the absolute difference between the test results of different laboratories should not exceed 0.20.
5.5 Determination of limiting viscosity
5.5.1 Method summary
The sample is dissolved in sodium thiocyanate solution and the limiting viscosity is determined by the single-point method. 5.5.2 Reagents and materials
5.5.2.1 Sodium oxychloride (GB629): 80g/solution 5.5.2.2 Sodium thiocyanate (GB1268): 101g/L solution. 5.5.3 Instruments and equipment 5.5.3.1 Ubbelohde viscometer (as shown in Figure 1): solvent outflow time ≥ 100s; 128 HG/T 2429--93 Figure 1 Ubbelohde viscometer A--Lower storage ball, outer diameter 26mm B Suspended horizontal ball C-Timing ball, volume 3.0ml. (±5%) D-Upper storage ball E, F timing markings G, H-Filling markings L-Releasing tube, outer diameter 11mm M-Lower outlet tube, outer diameter 6mm N-Upper outlet tube, outer diameter 7mm P Connecting tube, inner diameter 6.0mm (±5%) R-Working capillary inner diameter 0.55mm (±2%) Note: The tolerance of each tube length and spherical size is ±10% or ±10mm, whichever is the smallest. 5.5.3.2 Constant water bath: temperature controlled at 30°C ± 1°C; 5.5.3.3 Glass sintered funnel: G3
5.5.4 Analysis steps
5.5.4.1 Determination of effluent time of sodium thiocyanate solution (5.5.2.2) Place the clean and dry Ubbelohde viscometer (5.5.3.1) directly in a constant temperature water bath (5.5.3.2) at 30°C ± 1°C, add the sodium thiocyanate solution (5.5.2.2) filtered through the G3 sintered glass funnel (5.5.3.4) into the viscometer (5.5.3.1), and keep the temperature constant for 10~~15min until the liquid level reaches between the G and H scales. Use an ear bulb to absorb sodium thiocyanate solution above the scale mark C on the upper end of the sphere, and use a stopwatch to measure the time for the sodium thiocyanate solution to flow through the E and F engravings. Measure three times in a row, and the error should not exceed 0.2s. Take the average value and express it as t(s). 5.5.4.2 Preparation and determination of test solution
Weigh 10g of the sample in culture III, and neutralize the sample with sodium hydroxide solution (5.5.2.1) to make its pH value 9. It can be measured with precision pH test paper. Put it in an oven, heat it from room temperature, and bake it at 120℃ to constant weight. Weigh 0.8-1.0g of the dry sample with an accuracy of 0.0002g, dissolve it with sodium thiocyanate solution (5.5.2.2), transfer it to a 100mL volumetric flask, dilute it to the scale, shake it well, and set aside. Add the test solution filtered through the G sintered funnel into the clean and dry Ubbelohde viscometer (5.5.3.1) until the liquid level reaches between G and H. The following steps are carried out according to (5.5.4.1) starting from "constant temperature 10-15min*" until it does not exceed 0.2s". Take the average value and express it as t(s).
5.5.5 Expression of analysis results
Express the limiting viscosity X of the sample in dl./g: Calculate according to formula (3): X
t = specific viscosity;
Wu Zhong: 7p=
- relative viscosity; || tt||…Test concentration·d/d
2(nsp-lnn)
-Time for sodium thiocyanate solution to flow through viscometer E, time for test solution to flow through viscometer E, F scale, S. 5.5.6 Allowable difference
The absolute difference of the test results of different test plugs should not exceed 0.01dL/g. 6 Inspection rules
6.1 The quality inspection department of the manufacturer shall inspect the quality of olefin-acrylate products according to the test methods and inspection rules specified in this standard. The manufacturer shall ensure that all products shipped meet the requirements of this standard. Whose requirements. 6.2 Each batch of products leaving the factory should be accompanied by a quality certificate in a certain format. Its contents include: manufacturer name, product name, grade, batch number, production period, net quantity, proof that the product quality complies with this standard and the number of this standard. 6.3 The user has the right to conduct quality inspection on the received products in accordance with the provisions of this standard to verify whether its quality meets the requirements of this standard. 6.4 The manufacturer should inspect the products leaving the factory in batches, and each signed product is 1 batch. 6.5 Sampling method: The number of sampling barrels shall be selected according to the provisions of Table 2. Table 2 Provisions for selecting the number of sampling barrels
Total number of packaging barrels||tt| |82~101
102~125
Select the minimum number of barrels
Total number of barrels
When sampling, insert a glass tube or plastic tube into the barrel, stir evenly, take out the sample at 2/3, and the sample taken out shall not be less than 100mL. The obtained sample is placed in a clean and dry bottle and mixed evenly. The uniform sample is placed in two clean and dry bottles and sealed. Label the bottle. Indicate the manufacturer name, product name, batch number, production date, sampling date and name of the sampler, etc. One bottle is inspected by the quality inspection department 130
HG/T 2429—93
Test, the other bottle is a reserved sample for re-testing and arbitration, the retention period is six months. 6.5 If one requirement of the test result does not meet the requirements of this standard, the sample should be taken from the packaging barrel with twice the amount and tested again. If one of the results still does not meet the requirements of this standard, the whole batch of products cannot be accepted. 6.6 When the supply and demand parties have disputes over product quality and need arbitration, they can handle it in accordance with the provisions of the "Interim Methods for National Product Quality Arbitration Inspection".
6.7 Determine whether the test results meet the standards according to the rounded value comparison method specified in GB1250. 7 Marking, packaging, transportation, storage
7.1 On each package, there should be a clear and firm mark, the content of which is: manufacturer name, product name, trademark, grade, batch number. Production date and number of this standard. And apply the "upward" mark specified in GB191. 7.2 Acrylic acid-acrylate products are packaged in polyethylene barrels, with a net weight of 25kg per barrel. Or packaged according to user requirements. 7.3 Acrylic acid-acrylate products can be transported by road, rail or water. They should be covered during transportation and prevent collision during loading, unloading and transportation.
7.4 Acrylic acid-acrylate products should be stored in a cool and dry place for one year. 8 Safety requirements
When handling acrylic acid-acrylate products, operators should wear protective gloves to avoid direct contact. If any material escapes, it should be immediately rinsed with plenty of water. Additional notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Tianjin Chemical Industry Research Institute. This standard was drafted by Nanjing Chemical Engineering Design Institute. The main drafters of this standard are Lin Zhuxin, Hou Jinping, Hu Jingwen and Fan Rong. 1314.2 Preparation and determination of test solution
Weigh 10g of the sample in culture III, neutralize the sample with sodium hydroxide solution (5.5.2.1) to make its pH value 9, which can be measured with precision pH test paper, put it in an oven, heat it from room temperature, and bake it at 120℃ to constant weight. Weigh 0.8-1.0g of the dry sample with an accuracy of 0.0002g, dissolve it with sodium thiocyanate solution (5.5.2.2), transfer it to a 100mL volumetric flask, dilute it to the scale, shake it well, and set aside. Add the test solution filtered through the G sintered funnel into the clean and dry Ubbelohde viscometer (5.5.3.1) until the liquid level reaches between G and H. The following steps are carried out according to (5.5.4.1) starting from "constant temperature 10-15min*" until it does not exceed 0.2s". Take the average value and express it as t(s).
5.5.5 Expression of analysis results
Express the limiting viscosity X of the sample in dl./g: Calculate according to formula (3): X
t = specific viscosity;
Wu Zhong: 7p=
- relative viscosity; || tt||…Test concentration·d/d
2(nsp-lnn)
-Time for sodium thiocyanate solution to flow through viscometer E, time for test solution to flow through viscometer E, F scale, S. 5.5.6 Allowable difference
The absolute difference of the test results of different test plugs should not exceed 0.01dL/g. 6 Inspection rules
6.1 The quality inspection department of the manufacturer shall inspect the quality of olefin-acrylate products according to the test methods and inspection rules specified in this standard. The manufacturer shall ensure that all products shipped meet the requirements of this standard. Whose requirements. 6.2 Each batch of products leaving the factory should be accompanied by a quality certificate in a certain format. Its contents include: manufacturer name, product name, grade, batch number, production period, net quantity, proof that the product quality complies with this standard and the number of this standard. 6.3 The user has the right to conduct quality inspection on the received products in accordance with the provisions of this standard to verify whether its quality meets the requirements of this standard. 6.4 The manufacturer should inspect the products leaving the factory in batches, and each signed product is 1 batch. 6.5 Sampling method: The number of sampling barrels shall be selected according to the provisions of Table 2. Table 2 Provisions for selecting the number of sampling barrels
Total number of packaging barrels||tt| |82~101
102~125
Select the minimum number of barrels
Total number of barrels
When sampling, insert a glass tube or plastic tube into the barrel, stir evenly, take out the sample at 2/3, and the sample taken out shall not be less than 100mL. The obtained sample is placed in a clean and dry bottle and mixed evenly. The uniform sample is placed in two clean and dry bottles and sealed. Label the bottle. Indicate the manufacturer name, product name, batch number, production date, sampling date and name of the sampler, etc. One bottle is inspected by the quality inspection department 130
HG/T 2429—93
Test, the other bottle is a reserved sample for re-testing and arbitration, the retention period is six months. 6.5 If one requirement of the test result does not meet the requirements of this standard, the sample should be taken from the packaging barrel with twice the amount and tested again. If one of the results still does not meet the requirements of this standard, the whole batch of products cannot be accepted. 6.6 When the supply and demand parties have disputes over product quality and need arbitration, they can handle it in accordance with the provisions of the "Interim Methods for National Product Quality Arbitration Inspection".
6.7 Determine whether the test results meet the standards according to the rounded value comparison method specified in GB1250. 7 Marking, packaging, transportation, storage
7.1 On each package, there should be a clear and firm mark, the content of which is: manufacturer name, product name, trademark, grade, batch number. Production date and number of this standard. And apply the "upward" mark specified in GB191. 7.2 Acrylic acid-acrylate products are packaged in polyethylene barrels, with a net weight of 25kg per barrel. Or packaged according to user requirements. 7.3 Acrylic acid-acrylate products can be transported by road, rail or water. They should be covered during transportation and prevent collision during loading, unloading and transportation.
7.4 Acrylic acid-acrylate products should be stored in a cool and dry place for one year. 8 Safety requirements
When handling acrylic acid-acrylate products, operators should wear protective gloves to avoid direct contact. If any material escapes, it should be immediately rinsed with plenty of water. Additional notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Tianjin Chemical Industry Research Institute. This standard was drafted by Nanjing Chemical Engineering Design Institute. The main drafters of this standard are Lin Zhuxin, Hou Jinping, Hu Jingwen and Fan Rong. 1314.2 Preparation and determination of test solution
Weigh 10g of the sample in culture III, neutralize the sample with sodium hydroxide solution (5.5.2.1) to make its pH value 9, which can be measured with precision pH test paper, put it in an oven, heat it from room temperature, and bake it at 120℃ to constant weight. Weigh 0.8-1.0g of the dry sample with an accuracy of 0.0002g, dissolve it with sodium thiocyanate solution (5.5.2.2), transfer it to a 100mL volumetric flask, dilute it to the scale, shake it well, and set aside. Add the test solution filtered through the G sintered funnel into the clean and dry Ubbelohde viscometer (5.5.3.1) until the liquid level reaches between G and H. The following steps are carried out according to (5.5.4.1) starting from "constant temperature 10-15min*" until it does not exceed 0.2s". Take the average value and express it as t(s).
5.5.5 Expression of analysis results
Express the limiting viscosity X of the sample in dl./g: Calculate according to formula (3): X
t = specific viscosity;
Wu Zhong: 7p=
- relative viscosity; || tt||…Test concentration·d/d
2(nsp-lnn)
-Time for sodium thiocyanate solution to flow through viscometer E, time for test solution to flow through viscometer E, F scale, S. 5.5.6 Allowable difference
The absolute difference of the test results of different test plugs should not exceed 0.01dL/g. 6 Inspection rules
6.1 The quality inspection department of the manufacturer shall inspect the quality of olefin-acrylate products according to the test methods and inspection rules specified in this standard. The manufacturer shall ensure that all products shipped meet the requirements of this standard. Whose requirements. 6.2 Each batch of products leaving the factory should be accompanied by a quality certificate in a certain format. Its contents include: manufacturer name, product name, grade, batch number, production period, net quantity, proof that the product quality complies with this standard and the number of this standard. 6.3 The user has the right to conduct quality inspection on the received products in accordance with the provisions of this standard to verify whether its quality meets the requirements of this standard. 6.4 The manufacturer should inspect the products leaving the factory in batches, and each signed product is 1 batch. 6.5 Sampling method: The number of sampling barrels shall be selected according to the provisions of Table 2. Table 2 Provisions for selecting the number of sampling barrels
Total number of packaging barrels||tt| |82~101
102~125
Select the minimum number of barrels
Total number of barrels
When sampling, insert a glass tube or plastic tube into the barrel, stir evenly, take out the sample at 2/3, and the sample taken out shall not be less than 100mL. The obtained sample is placed in a clean and dry bottle and mixed evenly. The uniform sample is placed in two clean and dry bottles and sealed. Label the bottle. Indicate the manufacturer name, product name, batch number, production date, sampling date and name of the sampler, etc. One bottle is inspected by the quality inspection department 130
HG/T 2429—93
Test, the other bottle is a reserved sample for re-testing and arbitration, the retention period is six months. 6.5 If one requirement of the test result does not meet the requirements of this standard, the sample should be taken from the packaging barrel with twice the amount and tested again. If one of the results still does not meet the requirements of this standard, the whole batch of products cannot be accepted. 6.6 When the supply and demand parties have disputes over product quality and need arbitration, they can handle it in accordance with the provisions of the "Interim Methods for National Product Quality Arbitration Inspection".
6.7 Determine whether the test results meet the standards according to the rounded value comparison method specified in GB1250. 7 Marking, packaging, transportation, storage
7.1 On each package, there should be a clear and firm mark, the content of which is: manufacturer name, product name, trademark, grade, batch number. Production date and number of this standard. And apply the "upward" mark specified in GB191. 7.2 Acrylic acid-acrylate products are packaged in polyethylene barrels, with a net weight of 25kg per barrel. Or packaged according to user requirements. 7.3 Acrylic acid-acrylate products can be transported by road, rail or water. They should be covered during transportation and prevent collision during loading, unloading and transportation.
7.4 Acrylic acid-acrylate products should be stored in a cool and dry place for one year. 8 Safety requirements
When handling acrylic acid-acrylate products, operators should wear protective gloves to avoid direct contact. If any material escapes, it should be immediately rinsed with plenty of water. Additional notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Tianjin Chemical Industry Research Institute. This standard was drafted by Nanjing Chemical Engineering Design Institute. The main drafters of this standard are Lin Zhuxin, Hou Jinping, Hu Jingwen and Fan Rong. 1314 Acrylic acid-acrylate products should be stored in a cool and dry place for one year. 8 Safety requirements
When handling acrylic acid-acrylate products, operators should wear protective gloves to avoid direct contact. If any material escapes, it should be immediately rinsed with plenty of water. Additional remarks:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Tianjin Chemical Industry Research Institute. This standard was drafted by Nanjing Chemical Engineering Design Institute. The main drafters of this standard are Lin Zhuxin, Hou Jinping, Hu Jingwen, and Fan Rong. 1314 Acrylic acid-acrylate products should be stored in a cool and dry place for one year. 8 Safety requirements
When handling acrylic acid-acrylate products, operators should wear protective gloves to avoid direct contact. If any material escapes, it should be immediately rinsed with plenty of water. Additional remarks:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Tianjin Chemical Industry Research Institute. This standard was drafted by Nanjing Chemical Engineering Design Institute. The main drafters of this standard are Lin Zhuxin, Hou Jinping, Hu Jingwen, and Fan Rong. 131
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