GB 18581-2001 Limits of harmful substances in solvent-based wood coatings for interior decoration and renovation materials
Some standard content:
ICS 87.040
National Standard of the People's Republic of China
GB 18581—2001
Indoor decorating and refurbishing materials-Limit of harmful substances of solvent coatings for woodenware2001-12-10 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implementation on January 1, 2002
GB18581-2001
Chapter 3 of this standard is mandatory and the rest are recommended clauses. The limit value of benzene in this standard refers to the ecological standard of paints and varnishes (1999/10/EC) of the European Community Eco-label Products, and the limit value of soluble heavy metals refers to the requirements of the United Kingdom, Germany, France and the European Economic Commission for toxic heavy metals in children's toy materials (BS 5665: 1989, DIN EN71: 1989, NF EN71-3, EN71 1 1988). Appendix A and Appendix B of this standard are normative appendices. From January 1, 2002, the products produced by the production enterprises shall comply with this national standard, with a transition period of 6 months. From July 1, 2002, the products that do not meet this national standard shall be stopped from being sold on the market. This standard is proposed by the China Petroleum and Chemical Industry Association. This standard is under the jurisdiction of the National Technical Committee for Standardization of Paints and Materials. The responsible drafting units of this standard are: Changzhou Paint Chemical Research Institute of China National Chemical Corporation, Environmental Sanitation Monitoring Institute of Chinese Academy of Preventive Medicine, Shanghai Paint Co., Ltd., Shanghai Xu Material Research Institute, Sinochem Chemical Standardization Institute, and China Academy of Building Research. Participants of this standard include China Coatings Industry Association, China Building Materials Research Institute, Shanghai Huasheng Chemical Co., Ltd., Nanjing Huacai Special Coatings Factory, Nippon Paint (China) Co., Ltd., Brunner Mond Swire Paints (China) Co., Ltd., Zhejiang Tiannv Group Paint Co., Ltd., Shanghai Paint Factory, Changzhou Monkey King Paint Co., Ltd., Shanghai Academy of Building Research. Main drafters of this standard: Zhang Junzhi, Zhao Ling, Feng Shifang, Wei Qiping, Wu Guolin, Xu Dongqun, Wang Daopeng, Mei Jian, Xiong Wei. This standard was first issued on December 10, 2001. This standard is entrusted to the National Technical Committee for Standardization of Paints and Pigments for interpretation. 1 Scope
Indoor decoration and renovation materials
Limits of harmful substances in solvent-based wood coatings-CB 18581—2001
This standard specifies the technical requirements, test methods, inspection rules, packaging marks, safety equipment and protection for the permissible limits of harmful substances in nitrocellulose lacquers, polyurethane lacquers and alkyd lacquers for indoor decoration and renovation. This standard applies to solvent-based wood coatings for interior decoration and decoration1. Solvent-based materials for interior decoration and decoration of other resin types and other purposes can be used as a reference.
This standard does not apply to water-based wood coatings. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding erroneous content) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions are applicable to this standard. GB/T1250-1989 Method for expressing and determining limit values GB3186-1982 (1989) Sampling of bulk products (neqISO1512:1974) GB/T6682-1992 Specifications and test methods for water used in analytical laboratories (negISO3696:1987) GB/T6750-1986 Determination of density of paints and lacquers (eqvISO2811:1974) 6 Determination of volatile and non-volatile matter in paints and varnishes (eqvISO1515.1973) GB/T 6751--1986
GB/T9750-1998 Packaging marking of paint products GB/T9758.1-1988 Determination of "soluble" metal content of paints and varnishes Part 1: Determination of lead content Flame atomic absorption spectrometry and disulfide spectrophotometry (idtISO3856.1:1984) GB/T 9758.4-1988
GB/T 9758.6-1988
GB/T 9758. 7—1988
Determination of the "soluble" gold content of paints and varnishes Part 4: Determination of content Flame atomic absorption spectrometry and polarography (idtISO3856.4:1984) Determination of the "meltable" metal content of paints and varnishes Part 6: Determination of the total chromium content of the liquid part of the paint Flame atomic absorption spectrometry (idtISO3856.6—1984) Determination of the "meltable" metal content of paints and varnishes Part 7: Determination of the mercury content of the pigment part and the water-dilutable liquid part of the paint Flameless atomic absorption spectrometry (idtISO3856.7:19847
GB/T 18446-2001 Determination of unreacted toluene diisocyanate (TDI) monomer in urethane prepolymer and coating solution by gas chromatography
3 Requirements
The product shall meet the technical requirements of Table 1:
1) Wood coatings with organic matter as agent. GB 18581-2001
Volatile organic compound (VOC)\/(/L)Benzene/%
Toluene and xylene total/%
Free toluene_:isocyanate (TDI)/%
Heavy metal (limited color paint 2/(m/ke)≤
Soluble lead
Soluble radiation
Chromium
Soluble mercury
Table 1 Technical requirements
Nitro
Egg urea
Gloss (60°) ≥80,600
Gloss (60°) ≤80,700
Alkyd
Measure after mixing according to the ratio and dilution ratio specified in the product. If the amount of diluent used is a certain standard, it should be diluted according to the recommended amount and then measured.
If the product specifies the dilution ratio or the product is composed of two or more components, the content of the diluent and each component should be measured separately, and then the total amount of the mixed paint should be calculated according to the ratio specified in the product. If the amount of diluent used is within a certain range, it should be calculated according to the maximum dilution recommended by the product.
If the dilution ratio is specified for the paint or it is composed of two or more components, the content of the curing agent (including methyl methacrylate prepolymer) should be determined first, and then the total amount in the mixed paint should be calculated according to the ratio specified in the product. If the amount of diluent used is within a certain range, it should be calculated according to the recommended minimum dilution.
4 Test method
4.1 Sampling
The product shall be sampled in accordance with the provisions of GB3186-1982 (1989). The sample is divided into two parts, one is sealed and stored, and the other is used as a test sample.
4.2 Determination of volatile organic compounds (VOC) 4-2-1 After the sample is stirred evenly, the mass fraction of volatile matter (V) in the paint shall be determined according to GB/T6751--1986. The test conditions are: (105±2)℃, maintained for 3 h.
4.2.2 After the sample is stirred evenly, the coating density (p) is determined according to GB/T6750-1986, and the test temperature is (23±2)℃. 4.2.3 The volatile organic compound content is calculated according to the following formula: VOC = × p× 10
Wherein:
VOC——volatile organic compound content in the coating, in grams per liter (g/L), Vmass fraction of volatile matter in the coating:
Density of the coating at (23±2)℃, in grams per liter (g/mL.). 4.3 The determination of benzene shall be carried out according to Appendix A.
4. 4 The determination of toluene and xylene shall be carried out according to Appendix A. (1)
4.5 The determination of free toluene diisocyanate (TDI) shall be carried out according to GB/T 18446-2001. Methyl polysiloxane (SE-30) can also be selected as the fixing liquid. For samples that are prone to decomposition at 150°C, an appropriate temperature can be selected that allows the sample to be completely vaporized without decomposing it. 4.6 The determination of heavy metals (soluble lead, soluble radiation, soluble chromium, and soluble multiplier) shall be carried out in accordance with Appendix B. 5 Inspection rules
5.1 All technical contents listed in this standard are type inspection items. 5.1.1 Under normal production conditions, type inspection shall be carried out at least once a year. 5.1-2 Type inspection should be carried out at any time when any of the following situations occurs: when a new product is initially finalized; when a product is produced in a different place; when the production formula, process and raw materials are greatly changed; when production is resumed after a three-month suspension.
5.2 Determination of inspection results
5.2.1 The inspection results shall be determined in accordance with the rounded value comparison method in GB/T1250-1989. GB 185812001
5. 2. 2 When the inspection results of all items meet the requirements of this standard, the product meets the requirements of this standard. If any of the inspection results do not meet the requirements of this standard, the preserved samples shall be re-inspected. If the re-inspected results still do not meet the requirements of the standard, the product does not meet the requirements of this standard.
6 Packaging Marking
6.1 In addition to complying with the provisions of G1B/T9750-1998, products that have passed the inspection according to this standard may be clearly indicated on the packaging marking.
6.2 For coatings composed of two or more components, the proportion of each component should be clearly stated on the packaging marking. For coatings that need to be diluted during construction, the dilution ratio should be clearly stated on the packaging marking. 7 Safe Painting and Protection
7.1 During painting, the room should be well ventilated and away from fire sources. 7.2 Brushing should be used as much as possible.
3 Construction workers should wear necessary protective equipment during painting4 Continue to maintain indoor air circulation after painting is completed7.5 The room after painting should be vacant for a period of time before use. GB 18581—2001
A.1 Principle
Appendix A
(Normative Appendix)
Determination of benzene, toluene and xylene Gas chromatography After dilution of the sample, benzene, toluene and xylene (including ethyl extract) are separated from other components in the chromatographic column and detected by a hydrogen flame ionization detector using the internal standard method.
A.2 Reagents and materials
All reagents used are analytically pure except those with specified specifications. A.2.1 Carrier gas: oxygen, purity ≥ 99.8% A.2.2 Fuel gas: hydrogen, purity ≥ 99.8%; A.2.3 Fuel-supporting gas: air;
A.2.4 Ethyl acetate:
A.2.5 Benzene,
A.2.6 Toluene;
A.2.7 Xylene;
A.2.8 Internal standard: n-pentane, chromatographic grade. A.2.9 Stationary liquid: 20M ethylene glycol (PEG), for chromatography only. A.2.10 Stationary liquid: Apizoline M, for chromatography only. A.2.11 Support: Chromosorb WAw 149μm~177μm and 125μm~149μm. A 2. 12 Stainless steel column: 2 mm inner diameter, 2 m and 3 m long, 1 each. A.3 Instruments
A.3.1 Gas chromatograph: equipped with a program temperature controller (greater than 180°C), a hydrogen flame ionization detector, and a replaceable glass tube in the vaporizer lining.
A. 3.2 Sample injector: micro-syringe, 10 μL A.3.3 Sample bottle: volume of about 5 mL, with a sealable bottle cap. A.4 Chromatographic determination conditions
A, 4. 1 Chromatographic separation column
A.4.1.1 Polyethylene glycol (PEG) 20M column: 2m long, the stationary phase is 10% PEG20M coated on Chromo05robWAW125μm~149μm support.
A.4.1.2 Apizo M column: 3m long, the stationary phase is 10% Apizo M coated on ChromosrobWAW149μm~177μm support.
A.4.2 Column temperature
A.4.2.1 PFG 20M column: initial temperature 60℃, constant temperature for 10 min, then program temperature rise, heating rate 15℃/min, final temperature 180℃, hold for 5 min, hold until the baseline is straight. A.4.2.2 Apizone M column: initial temperature 120℃, constant temperature for 15 min, then program temperature rise, heating rate 15℃/min, final temperature 180℃, hold for 5tmin, hold until the baseline is straight. A.4.3 Detector temperature: 200℃.
A.4.4 Vaporization chamber temperature: 180℃.
A.4.5 Carrier gas flow rate: 30mL/min.
A.4.6 Combustion gas flow rate: 50mL/min.
A.4.7 Auxiliary gas flow rate: 500 mL/min. A.4.8 Injection volume: 1 μL.
GB 18581—2001bZxz.net
Previous: You can also select the best chromatographic determination conditions according to the properties of the gas chromatograph used and the actual situation of the sample. For example, you can also select n-conane as the internal standard, SE-30 as the fixed substance, and Chromosorb WA of 177 μm to 250 μm as the torsion. A.5 Experimental steps
A.5.1 Instrument preparation
Turn on the instrument according to the instrument operating procedures.
A.5.2 Parameter adjustment
Adjust the parameters specified in the chromatographic determination conditions to ensure that the sensitivity, stability and separation efficiency of the instrument are in the best state.
A.5.3 Provisions for relative correction factors
A.5.3.1 Preparation of standard samples: Weigh 0.02g (accurate to 0.0002g) of benzene, toluene, dimethyl ether and internal standard n-alkane in a 5mL sample bottle, add 3mL of ethyl acetate as diluent, seal and shake. Note: The sample bottle should be capped immediately after each weighing to prevent sample evaporation loss.
A.5.3.2 Determination of relative correction factors: After the instrument is stable, draw 1μL of standard sample and inject it into the vaporization chamber, record the chromatogram and chromatographic data. Determine the relative correction factors on a PEG 20M column and an Apizo M column. A.5.3.3 Calculation of relative correction factors: The relative correction factors of benzene, toluene and xylene to n-pentane are calculated as follows: m, Ae
, m: the mass of benzene, toluene and xylene respectively, in grams (g); Ae: the peak area of n-pentane;
me: the mass of n-pentane, in grams11 Support: ChromosorbWAw 149μm~177μm and 125μm~149μm. A 2. 12 Stainless steel column: 2 mm inner diameter, 2 m and 3 m long, 1 each. A.3 Instruments
A.3.1 Gas chromatograph: equipped with a program temperature controller (greater than 180C), a hydrogen flame ionization detector, and a replaceable glass tube lined in the vaporizer.
A. 3.2 Injector: micro-syringe, 10 μL A.3.3 Sample bottle: volume of about 5mL, with a sealable bottle cap. A.4 Chromatographic determination conditions
A,4. 1 Chromatographic separation column
A.4.1.1 Polyethylene glycol (PEG) 20M column: 2 m long, the stationary phase is 10% PEG20M coated on Chromo05robWAw 125μm~149 μm support.
A.4.1.2 Apizone M column: 3m long, with 10% Apizone M coated on ChromosrobWAW 149μm~177μm support.
A.4.2 Column temperature
A.4.2.1 Ethylene glycol (PFG) 20M column: initial temperature 60℃, constant temperature for 10min, then program temperature increase, heating rate 15℃/min, final temperature 180℃, hold for 5min, hold until the baseline is straight. A.4.2.2 Apizone M column: initial temperature 120℃, constant temperature for 15min, then program temperature increase, heating rate 15℃/min, final temperature 180℃, hold for 5tmin, hold until the baseline is straight. A.4.3 Detector temperature: 200℃.
A.4.4 Vaporization chamber temperature: 180℃.
A.4.5 Carrier gas flow rate: 30mL/min.
A.4.6 Combustion gas flow rate: 50mL/min.
A.4.7 Supporting gas flow rate: 500 mL/min. A.4. 8 Injection volume: 1 μL.
GB 18581—2001
Previous: You can also select the best chromatographic measurement conditions according to the properties of the gas chromatograph used and the actual situation of the sample. For example, you can also choose n-conane as the internal standard, SE-30 as the fixed substance, and Chromosorb WA of 177 μm to 250 μm as the twisting agent. A. 5 Test Procedure
A. 5. 1 Instrument Preparation
Turn on the instrument according to the instrument operation procedures.
A. 5. 2 Parameter Adjustment
Adjust the parameters according to the chromatographic determination conditions to ensure that the instrument's sensitivity, stability and separation efficiency are in the best state.
A.5.3 Relative Correction Factor Provisions
A.5.3.1 Preparation of Standard Samples: Weigh 0.02g (accurate to 0.0002g) of benzene, toluene, dimethyl ether and internal standard n-alkane in a 5mL sample bottle, add 3mL of ethyl acetate as diluent, seal and shake. Note: After each weighing, the sample bottle should be immediately capped to prevent sample volatilization loss.
A.5.3.2 Determination of Relative Correction Factors: After the instrument is stable, draw 1μL of standard sample and inject it into the vaporization chamber, record the chromatogram and chromatographic data. The relative correction factors are determined on a PEG 20M column and an Apizone M column. A.5.3.3 Calculation of relative correction factors: The relative correction factors of benzene, toluene and xylene for n-pentane are calculated as follows: m, Ae, m=the mass of benzene, toluene and xylene for n-pentane, in grams (g); Ae=the peak area of n-pentane;
me=the mass of n-pentane, in grams11 Support: ChromosorbWAw 149μm~177μm and 125μm~149μm. A 2. 12 Stainless steel column: 2 mm inner diameter, 2 m and 3 m long, 1 each. A.3 Instruments
A.3.1 Gas chromatograph: equipped with a program temperature controller (greater than 180C), a hydrogen flame ionization detector, and a replaceable glass tube lined in the vaporizer.
A. 3.2 Injector: micro-syringe, 10 μL A.3.3 Sample bottle: volume of about 5mL, with a sealable bottle cap. A.4 Chromatographic determination conditions
A,4. 1 Chromatographic separation column
A.4.1.1 Polyethylene glycol (PEG) 20M column: 2 m long, the stationary phase is 10% PEG20M coated on Chromo05robWAw 125μm~149 μm support.
A.4.1.2 Apizone M column: 3m long, with 10% Apizone M coated on ChromosrobWAW 149μm~177μm support.
A.4.2 Column temperature
A.4.2.1 Ethylene glycol (PFG) 20M column: initial temperature 60℃, constant temperature for 10min, then program temperature increase, heating rate 15℃/min, final temperature 180℃, hold for 5min, hold until the baseline is straight. A.4.2.2 Apizone M column: initial temperature 120℃, constant temperature for 15min, then program temperature increase, heating rate 15℃/min, final temperature 180℃, hold for 5tmin, hold until the baseline is straight. A.4.3 Detector temperature: 200℃.
A.4.4 Vaporization chamber temperature: 180℃.
A.4.5 Carrier gas flow rate: 30mL/min.
A.4.6 Combustion gas flow rate: 50mL/min.
A.4.7 Supporting gas flow rate: 500 mL/min. A.4. 8 Injection volume: 1 μL.
GB 18581—2001
Previous: You can also select the best chromatographic measurement conditions according to the properties of the gas chromatograph used and the actual situation of the sample. For example, you can also choose n-conane as the internal standard, SE-30 as the fixed substance, and Chromosorb WA of 177 μm to 250 μm as the twisting agent. A. 5 Test Procedure
A. 5. 1 Instrument Preparation
Turn on the instrument according to the instrument operation procedures.
A. 5. 2 Parameter Adjustment
Adjust the parameters according to the chromatographic determination conditions to ensure that the instrument's sensitivity, stability and separation efficiency are in the best state.
A.5.3 Relative Correction Factor Provisions
A.5.3.1 Preparation of Standard Samples: Weigh 0.02g (accurate to 0.0002g) of benzene, toluene, dimethyl ether and internal standard n-alkane in a 5mL sample bottle, add 3mL of ethyl acetate as diluent, seal and shake. Note: After each weighing, the sample bottle should be immediately capped to prevent sample volatilization loss.
A.5.3.2 Determination of Relative Correction Factors: After the instrument is stable, draw 1μL of standard sample and inject it into the vaporization chamber, record the chromatogram and chromatographic data. The relative correction factors are determined on a PEG 20M column and an Apizone M column. A.5.3.3 Calculation of relative correction factors: The relative correction factors of benzene, toluene and xylene for n-pentane are calculated as follows: m, Ae, m=the mass of benzene, toluene and xylene for n-pentane, in grams (g); Ae=the peak area of n-pentane;
me=the mass of n-pentane, in grams
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