Coating standard: limit of harmful substances in interior decoration dissolving agent Wood Coatings

Core tip: 1 Scope This standard specifies the classification, technical requirements, test methods, inspection rules, marks, packaging, transportation and storage of polymer cement waterproof coating (JS waterproof coating for short) This standard is applicable to two component waterborne architectural coatings made of acrylate polymer emulsion and cement and other additives The raw materials used shall not be harmful to the environment and human health 2 reference standards The following standards contain provisions which are incorporated by reference into this standard At the time of publication, the editions indicated are all valid All standards will be revised, Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Home of coatings: 1 scope this standard specifies the classification, technical requirements, test methods, inspection rules, marks, packaging, transportation and storage of polymer cement waterproof coating (JS waterproof coating for short) This standard is applicable to two component waterborne architectural coatings made of acrylate polymer emulsion and cement and other additives The raw materials used shall not be harmful to the environment and human health 2 The provisions contained in the following standards of the cited standards are the provisions of this standard by reference in this standard At the time of publication, the editions indicated are all valid All standards will be revised, and parties using this standard shall explore the possibility of using the latest version of the following standards GB / t528-1998 rubber vulcanized or thermoplastic Determination of tensile stress-strain properties (eqviso37:1994) GB / t2419-1994 determination of fluidity of cement mortar gb3186-1982 (1989) sampling of coating products gb12573-1990 sampling method of cement GB / t16777-1997 test method of building waterproof coating 3 Classification 3.1 type products are divided into type I and type II Type I: polymer based waterproof coating; type II: cement based waterproof coating 3.2 purpose type I product is mainly used for building waterproof engineering under non long-term immersion environment; type II product is suitable for building waterproof engineering under long-term immersion environment 3.3 product marking 3.3.1 marking method products shall be marked in the following order: name, type and standard number The 3.3.2 marking example I type polymer cement waterproofing coating is marked as: 4 technical requirement 4.1 the two components of the exterior products are stirred separately, and the liquid components of the product shall be homogeneous emulsion without impurities or gel, and the solid component shall be a powder without impurities or caking 4.2 physical and mechanical properties Physical and mechanical properties of products shall meet the requirements of Table 1 Table 1 the limit values of physical and mechanical properties of nitro paint polyurethane paint alkyd paint volatile organic compounds (VOC) a, g / L ≤ 750 gloss (600) ≥ 80600550 gloss (600) ≥ 80, 700 benzene B,% ≤ 0.5 toluene and xylene B,% ≤ 454010 free toluene diisocyanate (TDI) C,% ≤ - 0.7-heavy metal (color Limited paint) mg / kg soluble lead 90 soluble cadmium 75 soluble chromium 60 soluble mercury 60 A determine after mixing according to the specified ratio and dilution ratio of the product If the amount of diluent used is in a certain range, it shall be measured after diluting according to the recommended maximum amount of diluent b If the product specifies the dilution ratio or the product is composed of two or more components, the content of diluent and each component shall be determined respectively, and then the total amount of the mixed coating shall be calculated according to the specified ratio of the product If the amount of diluent used is within a certain range, it shall be calculated according to the recommended maximum dilution amount c If the polyurethane paint specifies the dilution ratio or is composed of two or more components, the content of curing agent (including toluene diisocyanate prepolymer) shall be determined first, and then the content of the mixed paint shall be calculated according to the specified ratio of the product If the amount of diluent used is within a certain range, it shall be calculated according to the recommended minimum amount of worry Note: 1 If the product is used in underground engineering, the project may not be tested 2 If the product is used for underground waterproof engineering, the project must be tested 5 test method 5.1 standard test conditions the standard test conditions of the laboratory are: temperature (23 ± 2) ℃, relative humidity 45% ~ 70% 5.2 before the test preparation, the samples and the instruments used shall be placed for at least 24 hours under the standard conditions 5.3 for appearance inspection, use glass rod to mix liquid and solid components respectively, and then conduct visual inspection 5.4 determination of solid content after the sample is mixed evenly according to the proportion specified by the manufacturer, the drying temperature is (105 ± 2) ℃ according to the provisions of method a in Chapter 4 of GB / t16777-1997 5.5 determination of drying time: weigh appropriate amount of liquid and solid components respectively according to the proportion specified by the manufacturer, mix and mechanically stir for 5min, and prepare the test piece according to the provisions of 12.2.1.1 in GB / t16777-1997, with the coating amount of (8 ± 1) g The surface drying time shall be determined according to 12.2.1.3b method in GB / t16777-1997 The dry time shall be determined according to 12.2.2.2b in GB / t16777-1997 The test conditions are: temperature (23 ± 2) ℃, relative humidity (50 ± 5)% 5.6 determination of tensile property 5.6.1 test apparatus is the same as 8.1 in GB / t16777-1997 5.6.2 sample preparation weigh appropriate liquid and solid components respectively according to the proportion specified by the manufacturer for the samples placed under standard conditions, mix them and mix them mechanically for 5min, pour them into the mold specified in 5.6.1 for coating, and pay attention not to mix bubbles In order to facilitate demoulding, the mold surface can be treated with silicone oil or paraffin The sample preparation time is two or three times of coating, and the latter coating shall be carried out after the former coating is dry, and the thickness of the sample shall be (1.5 ± 0.2) mm within 72 hours After demoulding, the sample is placed under standard conditions for 168h, then treated in a drying oven at (50 ± 2) ℃ for 24h, taken out and placed in a desiccator, and placed under standard conditions for at least 2H Cut the sample into test pieces with a microtome See Table 2 for the number and shape of test pieces required for tensile test 5.6.3 the test of tensile property without treatment shall be conducted according to the provisions of 8.2.2 in GB / t16777-1997, and the tensile speed shall be 200 mm / min 5.6.4 the tensile properties after heat treatment shall be determined according to 8.2.3 of GB / t16777-1997, with heat treatment temperature of (80 ± 2) ℃ and time of 168h Take it out and cool it to room temperature, and measure the tensile property according to 5.6.3 Table 2 number of extension test pieces note: 5 test pieces for each group, 1 for standby 5.6.5 the tensile properties after alkali treatment shall be determined according to 8.2.5 of GB / t16777-1997, with alkali immersion time of 168h After taking it out, wash it thoroughly with water, dry it and put it into a drying oven at (50 ± 2) ℃ for 6h, cool it to room temperature after taking it out, cut it into dumbbell shaped test pieces with a slicer, and measure the tensile properties according to the provisions of 5.6.3 5.6.6 the test pieces shall be treated according to 8.2.4 of GB / t16777-1997 for the determination of tensile properties after UV treatment The distance between the lamp tube and the test piece is 470-500mm, the space temperature about 50mm from the surface of the test piece is (45 ± 2) ℃, and the irradiation time is 250h Take it out and cool it to room temperature, and measure the tensile property according to 5.6.3 5.6.7 calculation of test results 5.6.7.1 calculation of tensile strength according to formula (1): P = f / a × D (1), P -- tensile strength, MPa; F -- maximum load of test piece, N; a -- width of narrow parallel part of cutter, mm; D -- average thickness of test length part, mm The tensile strength test results are expressed by the arithmetic mean of 5 test pieces, accurate to 0.1MPa 5.6.7.2 the elongation at break is calculated according to formula (2): l = l1-25 / 25 × 100 (2), where l - elongation at break of test piece,%; L1 - gauge distance at break of test piece, mm; 25 - initial gauge distance of test piece, mm The elongation at break test results are expressed as the arithmetic mean of the five test pieces to the nearest 1% 5.6.7.2 the fracture strength retention rate is calculated according to formula (3): e = P1 / P0 × 100 (3), in which e -- the retention rate of tensile strength after treatment,%; P1 -- the tensile strength after treatment, MPa; P0 -- the tensile strength under standard conditions, MPa The calculation result of retention of tensile strength is accurate to 1% 5.7 for the determination of low temperature flexibility, prepare the coating sample according to the provisions of 5.6.2, and cut three test pieces of 100mm × 25mm after demoulding The test shall be carried out according to the provisions of 11.2.1.2 in GB / t16777-1997, and the diameter of round bar shall be 10 mm 5.8 for the determination of water impermeability, prepare the coating sample according to the provisions of 5.6.2, and cut three 150 mm × 150 mm test pieces after demoulding The test shall be conducted according to the provisions of 11.2.2 and 11.2.3 in GB / t16777-1997 The test pressure is 0.3MPa Keep the pressure for 30min 5.9 determination of bonding strength of wet base 5.9.1 test apparatus a) tensile testing machine: range 0 ~ 1000N, Drawing speed 0 ~ 500mm / min; b) "8" shaped metal mold: according to figure 2 of GB / t16777-1997; c) "8" shaped cement mortar block; according to figure 3 of GB / t16777-1997; d) cement standard curing box (chamber): temperature control range (20 ± 1) ℃, relative humidity not less than 90%; E) traveling scale: accuracy 0.1mm 5.9.2 preparation of test piece: prepare half "8" shaped cement mortar block according to 6.2.1 of GB / t16777-1997 Remove the laitance on the section of the mortar block, and soak the mortar block in water at (23 ± 2) ℃ for 24h Weigh appropriate amount of liquid and solid components of the samples placed under standard conditions according to the proportion specified by the manufacturer, and mix them mechanically for 5min Take out the mortar block from the water, air it for 5min, evenly smear the mixed sample on the section of the sand anatomical block, carefully butt joint the sections of the two mortar blocks, and place it under the standard conditions for 4H Place the test piece in the cement standard curing box for 168h The curing conditions are: temperature (20 ± 1) ℃, relative humidity not less than 90% Prepare five test pieces for each group of samples 5.9.3 in the test procedure, place the cured specimen under the standard condition for 2h, and measure the length and width of the bonding surface of the specimen with a caliper (mm) Install the test piece on the fixture of the tensile testing machine, stretch the test piece at the speed of 50 mm / min, and record the tensile value (n) when the test piece is damaged 5.9.4 calculation of bond strength according to formula (4): σ = f / a × B (5-7), where σ - bond strength of test piece, MPa; F - tensile force value when test piece is damaged, N; a - length of bond surface of test piece, mm; B - width of bond surface of test piece, mm The bond strength test results are expressed as the arithmetic mean of five test pieces, accurate to 0.1MPa 5.10 the determination of impermeability shall be tested according to Appendix A (standard appendix) 6 Inspection rule 6.1 inspection classification 6.1.1 factory inspection items are appearance, solid content, drying time, untreated tensile strength, untreated elongation at break, low-temperature flexibility, impermeability or impermeability 6.1.2 type inspection type inspection items are all items specified in Chapter 4 In case of any of the following circumstances, formal inspection shall be carried out a) The trial production and finalization appraisal of new product trial production or product transfer production; b) type inspection once a year in normal production; c) great changes in raw materials, ratio and process of products that may affect product quality; d) production is stopped for more than half a year, and production is resumed; e) the factory inspection results are quite different from the previous formal inspection; f) When the national quality supervision institution puts forward the requirements for formal inspection 6.2 group