Some standard content:
Chemical Industry Standard of the People's Republic of China
HG /T 234592
Sulfonic acid curing agent for casting resin
Published on 1992-06-01
Ministry of Chemical Industry of the People's Republic of China
Implementation on 1993-07-01
W. Chemical Industry Standard of the People's Republic of China
Sulfonic acid curing agent for casting resin
1 Subject content and scope of application
HG/T 2345 -- 92
This standard specifies the model, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements of the acidifier products for casting resins.
This standard applies to solid and liquid sulfonic acid curing agents prepared by sulfonation and separation of benzene, toluene and dimethylbenzene with sulfuric acid. 2 Reference standards
GB265 Determination of viscosity of petroleum products
Preparation of standard solutions for titration analysis (volume analysis) GB 601
Chemical reagents
Preparation of preparations and products used in chemical reagent test methods GB 603
GB 4472
GB 6682
3Product model
General rules for determination of density and relative density of chemical productsLaboratory water specifications
Sulfonic acid curing agents are classified according to solvent type, total acidity, free sulfuric acid content and viscosity value. The models are: GG01, GS02, GS03. GS04, GC07, GC08, GC09.Product code (expressed in Arabic numerals)-Alcohol solution series
Solvent type (G-solid series, S-
—aqueous solution series, C—
Curing agent
Example: GG01 is solid sulfonic acid curing agent No. 01. GS03 is water-submerged sulfonic acid curing agent No. 03, GC 08 is alcohol solution sulfonic acid curing agent No. 08, 4Technical requirements
4. 1 Appearance
4.1.1 Solid series: self-colored or off-white crystalline powder, 4.1.2 Liquid series: brown or brown transparent liquid, no visible insoluble matter, no crystallization above -15°C, 4.2 Sulfonating agent shall also meet the requirements of Table 1, approved by the Ministry of Chemical Industry of the People's Republic of China on June 1, 1992, implemented on July 1, 1993
Item
Density. g/ctn
Viscosity (20), mpas
Total acidity (in H2SO4)%
Free sulfuric acid, %
Water-soluble substances, %
HG/T2345-92
[1. 20 ~ 1. 30 /1, 20 ~1. 30 |1. 20 ~ 1. 30 /1. 20 ~1. 40|5. 20 1. 40 |1. 20 - 1. 4010~30
150-180
60 ~~ BD
23. 0 ~ 28. 0|22, 0~ 24. 0 j24. 0 26. 0 18. 0 ~ 20. 0 25, 0 ~ 27. 0 :29. 0 ~ 31. 024. 5 ~ 27. 57.0
7. 0~ 10. 0bZxz.net
Note: 1) Model GG01 is allowed to have several specifications within the index range. 5 Test method
0. 0~1. 5
The reagents used in this standard are analytically pure reagents unless otherwise specified. The water used in this standard shall conform to the specifications of Grade III water in GB6682. The standard solutions, preparations and products used in this standard shall be prepared in accordance with GB601 and GB603. 5.1 Determination of dense spots
According to Article 2.3.3 of GB4472
5.2 Determination of viscosity
According to GB265
5.3 Determination of total acidity (in HSO,)
5.3. 1 Principle
Use sodium hydroxide standard titration solution to titrate the acid in the sample, and express the total acidity in sulfuric acid, -. 3.2 Reagents and solutions
a. Sodium hydroxide standard titration solution: c(NaOH)=0.2mal/L b. Methyl red-methylene blue mixed indicator solution. 4.5
4. 5~7. 5
5. 3. 3 Analysis steps
Weigh 0.5~1g of the sample (accurate to 0.0001g), place it in a 250mL conical flask, add 0.50mL of water and 2~3 drops of methyl red-methylene blue combined indicator, and titrate with sodium hydroxide standard titration solution until the solution turns gray-green. 5.3.4 Expression of analysis results
The mass percentage of the total concentration (in HSO4) is calculated according to formula (1): c-V x 0. 049
Wherein: m
-mass of the sample,
-actual concentration of the standard sodium hydroxide titration solution, mol/L: (1)
V-amount of the standard sodium hydroxide titration solution, mL; 0.049--mass of sulfuric acid in grams equivalent to 1.00mL of the standard sodium hydroxide titration solution (c(Na0H)=1.000mol)/L),
5.3.5 Allowable difference
HG/T 234$ - 92
The difference between the results of two parallel determinations shall not exceed 0.3%. The arithmetic mean shall be taken as the total acidity of the sample. 5.4 Determination of free vegetable acid content
5. 4.1 Principle
In an acidic medium, sulfate reacts with barium nitride to form sulfuric acid precipitation. Under the condition of pH ~ 10, excess barium and magnesium salts are titrated with disodium ethylenediaminetetraacetic acid standard titration solution to calculate the content of free sulfuric acid. 5.4.2 Reagents and solutions
5.4.2.1 Ammonium monoxide buffer solution: pH α 10, 5.4.2.* Disodium ethylenediaminetetraacetic acid (EDTA) standard titration solution: c(EDTA) = 0.05 mol / L 5.4.2.3 Barium nitride-magnesium nitride standard solution: c = α(BaCl,) + c(MgCl2) = 0.05 mol / L Preparation
Weigh 9.2 g sodium chloride (BaCl2·1H2O) and 2.6 g magnesium chloride (MgCl2*6H2O) and dissolve them in 1 000 mL Use a wave transfer tube to transfer 29,000 mL of the total magnesium hydride standard solution into a bonded bottle. Add 30 mL of water, 10 mL of ammonia-magnesium chloride buffer solution and about 10 drops of chrome ink T indicator, and use disodium ethylenediaminetetraacetic acid standard titration solution to titrate until the solution changes from purple-red to pure blue. The actual concentration c of magnesium chloride standard solution is calculated according to formula (2): cc(BaCl2)+c(MgCl2)
Where: 1. The concentration of barium chloride-magnesium chloride standard solution, l/L; ci—the concentration of disodium ethylenediaminetetraacetic acid standard titration solution, mol/L; —the amount of disodium ethylenediaminetetraacetic acid standard titration solution consumed by filtration, mL: 20.00—the volume of sodium chloride standard solution transferred, ≤ L, 5.4.2.4 Chrome ink T indicator: 5 g/L
5.4.3 Analysis steps
Weigh the sample according to the amount specified in Table 2 (accurate to 0.000 1 g) and place it in a conical flask. Add 30 mL of water, then use a pipette to accurately add 20.00 mL of magnesium oxide standard solution (5.4, 2.3), add 10 mL of ammonium hydroxide buffer solution (5.4.2.1) and about 10 drops of chrome black T indicator (5.4, 2.4), and titrate with disodium ethylenediaminetetraacetic acid standard alcohol (5.4.2.2) until the solution changes from purple-red to pure blue.
Product model
Weigh the sample amount,
5.4.4 Expression of analytical results
Free iodine mass percentage is calculated using formula (3): x2
0.3~0.5
(20 × c - c, + V) × 0. 098 Where: - actual viscosity of magnesium chloride standard solution, mol/L; 100
Ci—actual concentration of disodium ethylenediaminetetraacetic acid standard titration solution, mol/L: GC
titration consumption of disodium ethylenediaminetetraacetic acid standard titration solution, mL; Gcoa
0. 5~0.7
Amount of sample, name
HG/T2345-92
Volume of barium nitride-magnesium amide standard solution, mL; 20-
0.098-mass of sulfuric acid equivalent to 1.00 mL of disodium ethylenediaminetetraacetic acid standard titration solution Ce(EDTA)=1.000mol/L), expressed in grams.
5.4.5 Allowable difference
The difference between the results of two parallel determinations should not be greater than 0.2%. The arithmetic mean is taken as the free sulfuric acid content of the sample. 5.5 Determination of water-insoluble matter
5.5.1 Instruments and equipment
a. G4 microporous glass funnel;
b. Oven.
5.5.2 Analysis steps
Weigh 10g of sample (accurate to 0.1g), dissolve it in 100.mL water, and filter it under reduced pressure using a G4 microporous glass funnel that has been kept constant at 100-105℃. After filtration, wash the funnel with water 5-10 times, and then transfer it to an oven at 100-105℃ and dry it to constant weight. 5.5.3 Expression of analysis results
The mass percentage x of water-insoluble matter is calculated according to formula (4): (m,-m,)
Where: m
-the mass of the funnel and the residue that have been dried to constant weight after dissolving the sample, -the mass of the empty funnel that has been kept constant weight, 8
-the mass of the sample pan, g.
Inspection rules
Stone products shall be inspected by the inspection department of the manufacturer. The manufacturer shall ensure that the sulfonic acid curing agent products shipped out of the factory meet the requirements of this standard. Each batch of products produced shall be accompanied by a quality certificate. 6.2 The user unit has the right to inspect whether the sulfonic acid curing agent received meets the requirements of this standard. 6.3 The product obtained from one reaction tank is considered as a batch. 6.4
The unit of the overall material is plug or bag. When the number of units is less than 500, the number of sampling units selected shall be determined according to the provisions of Table 3. When the number of units of the overall material is greater than .500, the number of sampling units is 3×N (N is the number of overall units). Table. 3
Number of units of the overall material
11 ~ 49
: 50 ~ 64
82 101
102125
Minimum unit effect selected
All units
Products
Number of units of the overall material
126~151
152-181
182~216
217-254
255 ~296
297343
344~394
395450
451~512
HG/T2345-92
Minimum number of units for selection
Liquid sampling tube is made of glass, with diameter and length determined by yourself. After the sample barrel is manually mixed, take no less than 100g of sample. Solid sampling tube is made of stainless steel or plastic tube, with diameter and length determined by yourself. Insert the sampling tube into the upper, middle and lower parts of the sample bag, and take no less than 100g of sample.
6.5 Mix the samples, put them into a clean and dry ground-mouth bottle, and affix a label with the product name, batch number and sampling date, and submit them to the inspection department for analysis and inspection, and keep the samples for reference. 66 If the analysis and inspection results show that two or less (including two) items are unqualified, double sampling can be done for re-inspection. If one item is unqualified after re-inspection, no re-inspection will be done: the product will be judged as unqualified. If the inspection results show that more than three items (including three) are unqualified, no re-inspection will be done, and the product will be judged as unqualified.
6.7 When the supply and demand parties have objections to the product quality, they can negotiate to resolve the dispute or hire an arbitration unit for arbitration in accordance with the provisions of this standard. 7. Marking, packaging, transportation and storage
7.1. Marking
All sulfonic acid curing agents shipped out of the factory must have eye-catching labels on their packaging barrels and bags, indicating the product name, this standard number, trademark, batch number, model, net weight, manufacturer name and production date. 7.2. Packaging
7.2.1 Liquid sulfonic acid curing agent is packaged in plastic and covered with wooden baskets. The net weight of each barrel is 25kg. 2.2 Solid alkali acid curing agent is packaged in polyethylene plastic bags and woven bags. The net weight of each bag is 25kg. 7.2.3. Packaging requirements
Liquid sulfonic acid curing agent is placed in plastic barrels, and the feed port is tightly closed to prevent leakage. The baskets are fastened with strapping tape. If special packaging is required, the supply and demand parties shall negotiate separately.
The inner plastic bag of solid sulfonic acid curing agent is strictly prohibited from being condensed and deliquesced. 7.2.4 Each batch of products shipped out of the factory shall be accompanied by a product date and product quality certificate, which includes: product name, batch number, model, net weight, production date and this standard number. 7.3 Transportation and storage
The packaging of sulfonic acid curing agent should be kept intact during storage and transportation. Liquid packaging should be prevented from inversion, collision and packaging damage. W. Free download of various US standard industry materials HG / T 2345 —92
This product is corrosive and should be isolated from other items during storage and transportation. The packaging of this product should avoid long-term exposure to the sun.
The storage period of this product is 2 years.
Additional instructions:
This standard is 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 Shanxi Chemical Research Institute. This standard is drafted by the State-owned Weidong Chemical Plant and Shanxi Chemical Research Institute. The main drafters of this standard are Zhao Qingchun, Wu Zhendi, Zhu Jiangang Xue Jianhua and Wu Xiaohong.
Chemical Industry Standards of the People's Republic of China
Sulfonic Acid Curing Agent for Casting Resin
HG /T 2345—92
Editor: Chemical Industry Standards Continuation Department
(Standardization Research Institute of the Ministry of Chemical Industry)
Postal code: 100013
Printing: Standardization Research Institute of the Ministry of Chemical Industry
Copyright: No reproduction allowed
Format: 880×[2301/16
Word count: 11000
First edition in December 1992
First application in February 1992
Print run: 1—500
Cost: 2.20 yuan
.50 ~ 64
82 101
102125
Selected minimum unit effect
All units
Products
Total number of materials
126~151
152-181
182~216
217-254
255 ~296
297343
344~394
395450
451~512
HG/T2345-92
Minimum number of units for selection
Liquid sampling tube is made of glass, with diameter and length determined by yourself. After the sample barrel is manually mixed, take no less than 100g of sample. Solid sampling tube is made of stainless steel or plastic tube, with diameter and length determined by yourself. Insert the sampling tube into the upper, middle and lower parts of the sample bag, and take no less than 100g of sample.
6.5 Mix the samples, put them into a clean and dry ground-mouth bottle, and affix a label with the product name, batch number and sampling date, and submit them to the inspection department for analysis and inspection, and keep the samples for reference. 66 If the analysis and inspection results show that two or less (including two) items are unqualified, double sampling can be done for re-inspection. If one item is unqualified after re-inspection, no re-inspection will be done: the product will be judged as unqualified. If the inspection results show that more than three items (including three) are unqualified, no re-inspection will be done, and the product will be judged as unqualified.
6.7 When the supply and demand parties have objections to the product quality, they can negotiate to resolve the dispute or hire an arbitration unit for arbitration in accordance with the provisions of this standard. 7. Marking, packaging, transportation and storage
7.1. Marking
All sulfonic acid curing agents shipped out of the factory must have eye-catching labels on their packaging barrels and bags, indicating the product name, this standard number, trademark, batch number, model, net weight, manufacturer name and production date. 7.2. Packaging
7.2.1 Liquid sulfonic acid curing agent is packaged in plastic and covered with wooden baskets. The net weight of each barrel is 25kg. 2.2 Solid alkali acid curing agent is packaged in polyethylene plastic bags and woven bags. The net weight of each bag is 25kg. 7.2.3. Packaging requirements
Liquid sulfonic acid curing agent is placed in plastic barrels, and the feed port is tightly closed to prevent leakage. The baskets are fastened with strapping tape. If special packaging is required, the supply and demand parties shall negotiate separately.
The inner plastic bag of solid sulfonic acid curing agent is strictly prohibited from being condensed and deliquesced. 7.2.4 Each batch of products shipped out of the factory shall be accompanied by a product date and product quality certificate, which includes: product name, batch number, model, net weight, production date and this standard number. 7.3 Transportation and storage
The packaging of sulfonic acid curing agent should be kept intact during storage and transportation. Liquid packaging should be prevented from inversion, collision and packaging damage. W. Free download of various US standard industry materials HG / T 2345 —92
This product is corrosive and should be isolated from other items during storage and transportation. The packaging of this product should avoid long-term exposure to the sun.
The storage period of this product is 2 years.
Additional instructions:
This standard is 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 Shanxi Chemical Research Institute. This standard is drafted by the State-owned Weidong Chemical Plant and Shanxi Chemical Research Institute. The main drafters of this standard are Zhao Qingchun, Wu Zhendi, Zhu Jiangang Xue Jianhua and Wu Xiaohong.
Chemical Industry Standards of the People's Republic of China
Sulfonic Acid Curing Agent for Casting Resin
HG /T 2345—92
Editor: Chemical Industry Standards Continuation Department
(Standardization Research Institute of the Ministry of Chemical Industry)
Postal code: 100013
Printing: Standardization Research Institute of the Ministry of Chemical Industry
Copyright: No reproduction allowed
Format: 880×[2301/16
Word count: 11000
First edition in December 1992
First application in February 1992
Print run: 1—500
Cost: 2.20 yuan
.50 ~ 64
82 101
102125
Selected minimum unit effect
All units
Products
Total number of materials
126~151
152-181
182~216
217-254
255 ~296
297343
344~394
395450
451~512
HG/T2345-92
Minimum number of units for selection
Liquid sampling tube is made of glass, with diameter and length determined by yourself. After the sample barrel is manually mixed, take no less than 100g of sample. Solid sampling tube is made of stainless steel or plastic tube, with diameter and length determined by yourself. Insert the sampling tube into the upper, middle and lower parts of the sample bag, and take no less than 100g of sample.
6.5 Mix the samples, put them into a clean and dry ground-mouth bottle, and affix a label with the product name, batch number and sampling date, and submit them to the inspection department for analysis and inspection, and keep the samples for reference. 66 If the analysis and inspection results show that two or less (including two) items are unqualified, double sampling can be done for re-inspection. If one item is unqualified after re-inspection, no re-inspection will be done: the product will be judged as unqualified. If the inspection results show that more than three items (including three) are unqualified, no re-inspection will be done, and the product will be judged as unqualified.
6.7 When the supply and demand parties have objections to the product quality, they can negotiate to resolve the dispute or hire an arbitration unit for arbitration in accordance with the provisions of this standard. 7. Marking, packaging, transportation and storage
7.1. Marking
All sulfonic acid curing agents shipped out of the factory must have eye-catching labels on their packaging barrels and bags, indicating the product name, this standard number, trademark, batch number, model, net weight, manufacturer name and production date. 7.2. Packaging
7.2.1 Liquid sulfonic acid curing agent is packaged in plastic and covered with wooden baskets. The net weight of each barrel is 25kg. 2.2 Solid alkali acid curing agent is packaged in polyethylene plastic bags and woven bags. The net weight of each bag is 25kg. 7.2.3. Packaging requirements
Liquid sulfonic acid curing agent is placed in plastic barrels, and the feed port is tightly closed to prevent leakage. The baskets are fastened with strapping tape. If special packaging is required, the supply and demand parties shall negotiate separately.
The inner plastic bag of solid sulfonic acid curing agent is strictly prohibited from being condensed and deliquesced. 7.2.4 Each batch of products shipped out of the factory shall be accompanied by a product date and product quality certificate, which includes: product name, batch number, model, net weight, production date and this standard number. 7.3 Transportation and storage
The packaging of sulfonic acid curing agent should be kept intact during storage and transportation. Liquid packaging should be prevented from inversion, collision and packaging damage. W. Free download of various US standard industry materials HG / T 2345 —92
This product is corrosive and should be isolated from other items during storage and transportation. The packaging of this product should avoid long-term exposure to the sun.
The storage period of this product is 2 years.
Additional instructions:
This standard is 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 Shanxi Chemical Research Institute. This standard is drafted by the State-owned Weidong Chemical Plant and Shanxi Chemical Research Institute. The main drafters of this standard are Zhao Qingchun, Wu Zhendi, Zhu Jiangang Xue Jianhua and Wu Xiaohong.
Chemical Industry Standards of the People's Republic of China
Sulfonic Acid Curing Agent for Casting Resin
HG /T 2345—92
Editor: Chemical Industry Standards Continuation Department
(Standardization Research Institute of the Ministry of Chemical Industry)
Postal code: 100013
Printing: Standardization Research Institute of the Ministry of Chemical Industry
Copyright: No reproduction allowed
Format: 880×[2301/16
Word count: 11000
First edition in December 1992
First application in February 1992
Print run: 1—500
Cost: 2.20 yuan
.
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