Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T2247-91
Rare Earth Drier for Coatings
Published on November 12, 1991
Ministry of Chemical Industry of the People's Republic of China
Implemented on July 1, 1992
Chemical Industry Standard of the People's Republic of China
Rare Earth Drier for Coatings
Subject Content and Scope of Application
HG/T2247-91
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, storage and transportation of liquid carboxylic acid (cyclohexane acid, fatty acid and mixture of cyclohexane acid and fatty acid) rare earth driers. This standard applies to rare earth driers for coatings. This series of driers is made of carboxylic acid and rare earth chloride. It can replace traditional driers of other metal elements except cobalt and is used in solvent-based coatings such as varnish, enamel, primer, etc. that are formed by oxidation polymerization. 2 Reference standards
Chemical reagent titration analysis (volume analysis 2 Preparation of standard solution GB1722
GB1724
GB3186
GB5208
GB6682
Color determination of varnish, clear oil and thinner Determination of coating fineness
Sampling of coating products
Determination of coating flash point
Laboratory water specifications
ZBG51033C01-1Alkyd varnish
3 Technical requirements
Quick balance method
The product should meet the following table Technical requirements listed. Refers to
Color, No.
Fineness, μm
Total rare earth content
Not more than
Not more than
RE20s*g/100mL (Method 1)
RE+, % (Method 2)
Miscibility with No. 200 paint solvent oil
Drying performance
Flash point, ℃
Not less than
Type I approved by the Ministry of Chemical Industry of the People's Republic of China on November 12, 1991
Rare earth cyclohexane
Reddish brown
Rare earth fatty acids| |tt||Mixed acid (cyclohexane acid and fatty acid) rare earth
Transparent liquid, no mechanical impurities
Light yellow to tea yellow
Brown red
Meet the requirements of ZBG51033 for drying time 32
1992-07-01 implementation
4 Test method
HG/T2247-91
Test conditions: Unless otherwise specified, the test temperature of this test is 23±2℃. 4.1 Appearance
Visual inspection.
4.2 Color
Evaluate according to GB1722. ||tt| |4.3 Fineness
Determine in accordance with GB1724.
4.4 Total rare earth content
4.4.1 Method 1
4.4.1.1 Reagents and solutions
Unless otherwise specified, the reagents used in this test are all chemically pure reagents; the water used in the test refers to laboratory grade 3 water that meets the requirements of GB6682.
4.4.1.1.1 Vanillin blue indicator: Use 20% (V/V) ethanol to prepare 0.1% thymol blue solution. 4.4.1.1.2
Sulfosalicylic acid solution: 10% aqueous solution. 4. 4. 1. 1.3
Ascorbic acid.
4. 4. 1.1. 4
Xylenol orange indicator: Mix 1g xylenol orange with 200g sodium chloride and grind into powder. 4.4.1.1.5 Sodium chloride.
4. 4.1.1. 6
Concentrated hydrochloric acid.
4. 4. 1.1.7
4. 4.1.1.8
Hydrochloric acid solution: 1+1 solution.
Hydrochloric acid solution: 1+3 solution.
4.4.1.1.9
Ammonium hydroxide solution: 1+1 solution. bZxz.net
0 Hexamethylenetetramine-hydrochloric acid buffer solution: Weigh 40g hexamethylenetetramine, add 100mL water and 10mL concentrated hydrochloric acid 4.4.1.1.10
(4.4.1.1.6) to dissolve and shake well, measure the pH value of the solution with a pH meter, and adjust the pH value to 5.4~5.5 (add hexamethylenetetramine when the pH value is lower than 5.4; add hydrochloric acid when the pH value is higher than 5.5). 4.4.1.1.11 EDTA standard titration solution: c(EDTA)=0.1mol/L, prepared and calibrated according to GB601. 4.4.1.2 Determination steps
4.4.1.2.1 Use a pipette to transfer 5mL of the sample, place it in a 25mL separatory funnel (long pear shape), and use 5mL of hydrochloric acid (4.4.1.1.7) for back extraction three times. Collect the obtained three stripping solutions (lower layer) in a 50mL beaker. 4.4.1.2.2 Heat the stripping solution until it is almost dry (be careful not to splash), rinse the beaker several times with as little water as possible (clean), and pour all the washing solution into a 250mL conical flask.
4.4.1.2.3 Add 0.2g ascorbic acid and 2mL 10% sulfosalicylic acid (4.4.1.1.2), and shake well. Add 1 drop of vanillin blue solution (4.4.1.1.1), adjust the solution to yellow with ammonium hydroxide (4.4.1.1.9), and add 8mL hexamethylenetetramine-hydrochloric acid buffer solution (4. 4.1.1.10).
4.4.1.2.4 Add an appropriate amount of xylenol orange indicator (4.4.1.1.4) to make the solution appear red, and titrate with EDTA disodium salt standard titration solution (4.4.1.1.11). The end point is when the solution changes from red to bright yellow. 4.4.1.3 Calculation
Calculate the total rare earth oxide (RE203) content (g/100mL) according to formula (1): Total RE20: content = ·VX0.164
Where: ci——actual concentration of EDTA disodium salt standard titration solution, mol/L, V,——volume of EDTA disodium salt standard titration solution consumed, mL, 2
HG/T2247-91
0.164——with 1.00mL EDTA standard titration solution Cc(EDTA)=1.000mol /LJ equivalent rare earth oxide (average mass expressed in grams.
4.4.1.4 Allowable difference
4.4.1.4.1 Take the arithmetic mean of the parallel determination results as the determination result; 4.4.1.4.2 The absolute difference of the parallel determination results shall not exceed 0.05%. 4.4.2 Method 2
4.4.2.1 Reagents and solutions
RE20) with
Unless otherwise specified, the reagents used in this test are analytically pure reagents; the water used in the test refers to the laboratory grade 3 water that meets the requirements of GB6682.
4.4.2.1.1 No. 200 paint solvent oil (industrial use) 4. 4.2.1. 2
Ethanol (95%).
4.4.2.1.3 Hydroxylamine hydrochloride.
4.4.2.1.4 Concentrated hydrochloric acid.
4.4.2.1.5 Hydrochloric acid solution: 1:3 solution. 6 Hexamethylenetetramine-hydrochloric acid buffer solution: weigh 20g hexamethylenetetramine, dissolve it in 80g water, slowly add concentrated hydrochloric acid (4.4.2.1.4) under stirring, measure the pH value of the solution with a pH meter, and adjust it to pH=5.4~5.6. 4. 4.2. 1.7
Xylenol orange indicator: dissolve 0.2g xylenol orange in 100mL water. 4.4.2.1.8 Zinc chloride standard titration solution: c(ZnC12)-0.05mol/L, prepared and calibrated according to GB601. 4.4.2.1.9 EDTA disodium salt standard titration solution: c(EDTA)=0.05mol/L, prepared and calibrated according to GB601. 4.4.2.2 Determination steps
Weigh 0.2~0.3g (accurate to 0.0001g) of the sample, place it in a 250mL conical flask, dilute it with 2~3mL of No. 200 paint solvent oil, add 30mL of ethanol, and shake well. Add 20.00mL of 0.05mol/LEDTA standard titration solution (4.4.2.1.9) and a little hydroxylamine hydrochloride, shake well, then add 10mL of buffer solution (4.4.2.1.6), add 2 drops of xylenol orange indicator (4.4.2.1.7), and titrate with 0.05mol/L zinc chloride standard titration solution (4.4.2.1.8). The end point is when the solution changes from yellow to red. 4.4.2.3 Calculation
Calculate the percentage of total rare earth metal ions (RE3+) according to formula (2): total RE+-V2-×0.140×100
Wherein: c2——actual concentration of EDTA disodium salt standard titration solution, mol/L; V2——volume of EDTA disodium salt standard titration solution, mL; actual concentration of zinc chloride standard titration solution, mol/LC3
V3——volume of zinc chloride standard titration solution consumed, mL, m-
mass of sample, g
0.140——average mass of rare earth atoms equivalent to 1.00mL zinc chloride standard titration solution [c(ZnCl2)=1.000mol/L] expressed in grams.
4.4.2.4 Allowable difference
4.4.2.4.1 Take the arithmetic mean of the parallel determination results as the determination result; 4.4.2.4.2 The absolute difference of the parallel determination results shall not exceed 0.08%. 4.5 Miscibility
Weigh 10g of the sample, slowly add 30g of No. 200 paint solvent oil while stirring (when the sample is fatty acid rare earth, add 20g of No. 200 paint solvent oil), and the solution is transparent and uniform, which means it is completely dissolved. 4.6 Drying performance
4.6.1 Preparation of C01-1 alkyd varnish
4.6.1.1 Alkyd resin solution
HG/T2247—91
Prepare medium-oil alkyd resin solution (N·V=50%; solid acid value not more than 24mgKOH/g) for preparing C01-1 alkyd varnish. The varnish prepared from this solution shall meet the requirements of ZBG51033. 4.6.1.2 Amount of drier
Replace the sum of the amounts of other traditional metal driers (in terms of metal amount) in the original alkyd varnish formula with carboxylic acid rare earth driers. 4.6.1.3 Paint preparation
Add the drier (4.6.1.2) to the alkyd resin solution (4.6.1.1) according to the requirements of the C01-1 alkyd varnish formula, mix well, and prepare the varnish. 4.6.2 Determination steps
Determine the drying time of the varnish (4.6.1.3) according to the provisions of ZBG51033. The temperature, humidity, state adjustment conditions, plate making method, film thickness and inspection method of this test shall be carried out or performed in accordance with the corresponding provisions of ZBG51033.
The dryness requirements in ZBG51033 are met, which means that the requirements are met. 4.7 Flash point
Determine in accordance with GB5208.
5 Inspection rules
5.1 All technical requirements listed in this standard are type inspection items. Among them, appearance, color, fineness, total rare earth content, and miscibility with No. 200 paint solvent oil are listed as factory inspection items. Under normal production conditions, type inspection is carried out every six months. 5.2 The product shall be inspected by the inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that all products leaving the factory meet the technical requirements of this standard. The product shall have a certificate of conformity and, if necessary, instructions for use and precautions. 5.3 The receiving department has the right to inspect the product in accordance with the provisions of this standard. If it is found that the quality does not meet the technical requirements of this standard, the supply and demand parties shall jointly re-sample and re-inspect in accordance with GB3186. If it still does not meet the technical requirements of this standard, the product is unqualified and the receiving department has the right to return the product.
5.4 The product shall be sampled in accordance with the provisions of GB3186. The sample shall be divided into two parts, one of which shall be sealed and stored for future reference, and the other shall be used for inspection. 5.5 The supply and demand parties shall inspect and check the product packaging, quantity and marking. If the packaging is damaged or leaking, the quantity is inconsistent, or the marking does not comply with the regulations, the relevant departments shall be notified in time for handling. 5.6 If there is a dispute between the supply and demand parties over product quality, the product quality supervision and inspection agency shall conduct arbitration. 6 Packaging, marking, purchase, storage and transportation
6.1 The product shall be stored in a clean, dry and sealed container. The container shall be labeled with the product model, name, batch number, quantity, manufacturer's name and production date.
6.2 The product shall be kept ventilated and dry during storage, and shall be protected from direct sunlight, isolated from fire and heat sources. In summer, when the temperature is too high, efforts shall be made to cool it down.
6.3 The product shall be protected from rain and sunlight during transportation, and shall comply with relevant regulations. 6.4 The effective storage period of the product is one year from the date of production under the storage and transportation conditions in accordance with 6.2 and 6.3. After the storage period, the product can be inspected according to the items specified in this standard. If the results meet the requirements, it can still be used. Additional remarks:
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 the National Technical Committee for Standardization of Paints and Pigments. This standard was drafted by the Paint Industry Research Institute of the Ministry of Chemical Industry and the Xinzheng County Chemical Plastics Factory of Henan Province. 4
HG/T2247-91
The main drafters of this standard are Su Mei, Cui Xuehuan, Liu Meiling, Si Junjie and Sun Ziqiang. 52 The product should be stored in a ventilated and dry place, and should be protected from direct sunlight. It should be isolated from fire and heat sources. When the temperature is too high in summer, efforts should be made to cool it down.
6.3 The product should be protected from rain and sunlight during transportation, and should comply with relevant regulations. 6.4 The product has an effective storage period of one year from the date of production under the storage and transportation conditions of 6.2 and 6.3. If the storage period is exceeded, it can be inspected according to the items specified in this standard, and it can still be used if the results meet the requirements. 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 the National Technical Committee on Standardization of Paints and Pigments. This standard was drafted by the Paint Industry Research Institute of the Ministry of Chemical Industry and Xinzheng County Chemical Plastic Factory of Henan Province. 4
HG/T2247—91
The main drafters of this standard are Su Mei, Cui Xuehuan, Liu Meiling, Si Junjie, and Sun Ziqiang. 52 The product should be stored in a ventilated and dry place, and should be protected from direct sunlight. It should be isolated from fire and heat sources. When the temperature is too high in summer, efforts should be made to cool it down.
6.3 The product should be protected from rain and sunlight during transportation, and should comply with relevant regulations. 6.4 The product has an effective storage period of one year from the date of production under the storage and transportation conditions of 6.2 and 6.3. If the storage period is exceeded, it can be inspected according to the items specified in this standard, and it can still be used if the results meet the requirements. 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 the National Technical Committee on Standardization of Paints and Pigments. This standard was drafted by the Paint Industry Research Institute of the Ministry of Chemical Industry and Xinzheng County Chemical Plastic Factory of Henan Province. 4
HG/T2247—91
The main drafters of this standard are Su Mei, Cui Xuehuan, Liu Meiling, Si Junjie, and Sun Ziqiang. 5
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