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GB 18582-2020 English PDF (GB18582-2020)

GB 18582-2020 English PDF (GB18582-2020)

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GB 18582-2020: Limit of harmful substances of architectural wall coatings

This standard stipulates the product classification, requirements, test methods, inspection rules, packaging marks, standard implementation related to the allowable limits of substances harmful to humans and the environment in architectural wall coatings.
GB 18582-2020
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 87.040
G 51
Replacing GB 18582-2008, GB 24408-2009
Limit of harmful substances of architectural wall
coatings
ISSUED ON: MARCH 04, 2020
IMPLEMENTED ON: DECEMBER 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Product classification ... 8
5 Requirements ... 8
6 Test methods ... 10
7 Inspection rules ... 11
8 Packaging marks ... 12
9 Implementation of standards ... 12
Appendix A (Normative) Determination of moisture content - Gas
chromatography ... 14
References ... 18
Limit of harmful substances of architectural wall
coatings
1 Scope
This standard stipulates the product classification, requirements, test methods, inspection rules, packaging marks, standard implementation related to the allowable limits of substances harmful to humans and the environment in architectural wall coatings.
This standard is applicable to all kinds of architectural wall coatings that are directly painted on site and factory-applied to decorate and protect the inner and outer surfaces of buildings based on cement-based and other non-metallic materials (except wood materials).
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard.
GB/T 1725-2007 Paints, varnishes and plastics - Determination of non-
volatile-matter content
GB/T 3186 Paints varnishes and raw materials for paints and varnishes - Sampling
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
GB/T 6750-2007 Paints and varnishes - Determination of density -
Pycnometer method
GB/T 8170-2008 Rules of rounding off for numerical values & expression
and judgement of limiting values
GB/T 9750 Marks for package of coating products
GB 15258 General rules for preparation of precautionary label for chemicals GB/T 23985-2009 Paints and varnishes - Determination of volatile organic Decorative panel coatings
A type of coating applied to panel-like products (except metal materials) with functions of heat preservation and decoration on the surface of building walls. Note: The decorative panels mainly include non-asbestos calcium silicate board, non-asbestos fiber cement board, natural granite thin stone, glass, porcelain board, ceramic board, etc.
3.4
Effect pigment
Usually flake pigments, in addition to providing color, which can also provide some other properties, such as iridescence (formed by light due to
interference in a thin layer), optically variable color (color change, color jump, color shading) or texture.
[GB/T 5206-2015, definition 2.91]
3.5
Volatile organic compound
VOC
Organic compounds participating in atmospheric photochemical reactions, or organic compounds determined according to relevant requirements.
3.6
Volatile organic compound content
VOC content
The mass of volatile organic compounds present in the coating as measured under specified conditions.
[GB/T 5206-2015, definition 2.271]
3.7
Application condition
When the construction method and application conditions meet the
requirements in the technical specifications of the corresponding product, after all the components of the product are mixed, the conditions that the application can be performed.
6 Test methods
6.1 Sampling
It performs sampling according to the provisions of GB/T 3186, or sampling according to the agreed method. The sampling volume is determined according to testing needs.
6.2 Test method
6.2.1 VOC content
6.2.1.1 Density
It is performed according to the provisions of GB/T 6750-2007. The test temperature is (23 ?? 0.5) ??C.
6.2.1.2 VOC content in water-based wall coatings and water-based
decorative panel coatings
It is performed according to the provisions of GB/T 23986-2009. The
chromatographic column uses medium-polarity column (6% cyanopropylphenyl / 94% polydimethylsiloxane capillary column); the label is diethyl adipate. Weigh about 1 g of the sample. The calibration compounds include but are not limited to methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol,
triethylamine, dimethylethanolamine, 2-amino-2-methyl-1-propanol, ethylene glycol, 1,2-propanediol, diethylene glycol, 2,2,4-trimethyl-1,3-pentanediol, etc. The determination of moisture content is carried out in accordance with the provisions of Appendix A. Putty samples are not subject to the test of moisture content and density.
The calculation of the VOC content in the paint is carried out according to 10.4 in GB/T 23986-2009; the detection limit is 2 g/L. The calculation of the VOC content in the putty is carried out according to 10.2 in GB/T 23986-2009 and converted to grams per kilogram (g/kg); the detection limit is 1 g/kg.
6.2.1.3 VOC content in solvent-based decorative panel coatings
It is performed according to the provisions of GB/T 23985-2009. The content of non-volatile matter is tested in accordance with the provisions of GB/T 1725- 2007. Weigh about 1 g of the sample and the baking condition is (105 ?? 2) ??C/1 h. The moisture is not tested; the moisture content is set to zero.
The calculation of VOC content is carried out according to 8.3 in GB/T 23985- 2009.
6.2.2 Formaldehyde content
7.1.2 The type inspection shall be carried out at any time when one of the following conditions:
- When the new product is initially type-finalized;
- When the product is produced off-site;
- When there are major changes in production formulas, processes and raw materials;
- When production is resumed after three months of suspension.
7.2 Determination of test results
7.2.1 Judgment of test results shall be carried out according to the comparison method of rounding-off value in GB/T 8170-2008.
7.2.2 For powdery putty (except for powdery putty diluted only with water) and decorative panel coatings, when the inspection results are reported, it shall also indicate the construction ratio of the product under the application condition. 7.2.3 When the inspection results of all items meet the requirements of this standard, the product is deemed as complying with the requirements of this standard.
8 Packaging marks
8.1 In addition to the provisions of GB/T 9750, for the product?€?s packaging mark, it shall be clearly indicated on the packing mark of the product which had passed the inspection according to this standard.
8.2 The biocide in the product shall be marked for hazard according to the provisions of GB 15258.
8.3 The packaging mark or the product manual shall indicate the construction ratio in the application condition.
8.4 The packaging mark or the product manual shall indicate the classification and product type in accordance with this standard.
8.5 For polyurethane, epoxy and other multi-component cured coatings, the packaging mark or the product manual shall indicate the application period. 9 Implementation of standards
9.1 Solvent-based wall coatings for buildings shall not be used in the field coating since the implementation of this standard.
Appendix A
(Normative)
Determination of moisture content - Gas chromatography
A.1 Reagents and materials
A.1.1 Distilled water: Meet the requirements of the grade III water in GB/T 6682- 2008.
A.1.2 Dilution solvent: The organic solvent used to dilute the sample and dried by molecular sieve does not contain any substance that interferes with the test. The purity is at least 99% (mass fraction) or of known purity. For example, dimethylformamide.
A.1.3 Internal standard: A compound that does not exist in the sample and is dried by molecular sieve. The compound can be completely separated from other components on the chromatogram. The purity is at least 99% (mass
fraction) or of known purity. For example, isopropyl alcohol.
A.1.4 Molecular sieve: Pore size is 0.2 nm ~ 0.3 nm; particle size is 1.7 mm ~ 5.0 mm. The molecular sieve shall be used after regeneration.
A.1.5 Carrier gas: Hydrogen or helium, purity ??? 99.995%.
A.2 Instruments
A.2.1 Gas chromatograph: It is equipped with thermal conductivity detector and programmed temperature-rising controller.
A.2.2 Column: A capillary column of styrene-divinylbenzene porous polymer. Note: Other chromatographic columns that meet the inspection requirements can also be used.
A.2.3 Sample injector: Micro syringe, 10 ??L.
A.2.4 Sample preparation bottle: Glass bottle of about 10 mL, which has a sealable bottle cap.
A.2.5 Balance: The actual scale value d = 0.1 mg.
A.3 Gas chromatography test conditions
A.3.1 Column: Capillary column of styrene-divinylbenzene porous polymer, 25 m ?? 0.53 mm ?? 10 ??m.
Where:
R - The relative response factor of water;
mi - The mass of the internal standard, in grams (g);
Aw - Peak area of water;
A0 - Peak area of water in blank sample;
mw - Mass of water, in grams (g);
Ai - Peak area of internal standard.
Make two parallel tests. Take the average of the results of the two tests. The relative deviation shall be less than 5%.
A.4.2 Sample analysis
Weigh about 0.6 g of the specimen after stirring it uniformly and the internal standard (A.1.3) that is approximately equal to the water content in the sample preparation bottle (A.2.4), accurate to 0.1 mg. Record the mass ms of the specimen and the mass mi of the internal standard. Then add 5 mL of dilution solvent (A.1.2) (the volume of dilution solvent can be adjusted according to the state of the sample). Seal the sample preparation bottle (A.2.4) and shake it uniformly. At the same time, prepare a mixture of internal standard and diluted solvent without specimen as a blank sample. Shake vigorously or sonicate the sample bottle (A.2.4) containing the specimen for 15 minutes; let it be standing for 5 min to let it settle [to make the specimen settle as soon as possible, it may add a few small glass beads into the sample preparation bottle (A.2.4) which contains specimen; then shake it vigorously; it may also use a low-speed centrifuge to precipitate it]. Use a micro syringe (A.2.3) to draw 1 ??L of supernatant from the sample preparation bottle (A.2.4); inject it into the chromatograph; record the chromatogram.
A.4.3 Calculation
Calculate the moisture content ww of the specimen according to formula (A.3): Where:
ww - The moisture content in the specimen, in terms of mass fraction;

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