Coating standard: polyurethane waterproof coating national standard

Core tip: compared with the JC / T 500-92 industry standard, the national standard of polyurethane waterproof coating mainly revised the following contents: (1) the test items of qualified products, first-class products and service life were cancelled; (2) the single component products were added; (3) the tensile properties of products were classified into I and II categories; (4) the test methods and technical indexes were adjusted; (5) Safety and environmental protection requirements related to production and use are added It is specified in the general requirements that the products included in this standard shall not have harmful effects on human body, biology and environment, and {todayhot} and Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: compared with the JC / T 500-92 industry standard, the national standard of polyurethane waterproof coating mainly revised the following contents: (1) the test items of qualified products, first-class products and service life were cancelled; (2) single component products were added; (3) the tensile properties of products were classified into I and II categories; (4) the test methods and technical indexes were adjusted; (5) safety and environmental protection requirements related to production and use are added It is clearly stipulated in the general requirements that: the products included in this standard shall not have harmful effects on human body, biology and environment, and the safety and environmental protection requirements related to {todayhot} and use shall conform to the provisions of relevant national standards and codes in China; (6) test items such as tear strength and adhesive strength of wet base surface are added With the approval of the General Administration of quality supervision, inspection and Quarantine of the people's Republic of China, GB / T 19250-2003 polyurethane waterproof coating was officially implemented on March 1, 2004 Since the implementation of this standard, JC / T 500-92 (polyurethane waterproof coating) standard will be abolished The current JC / T 500-1992 polyurethane waterproof coating industry standard was implemented on April 1, 1993 The standard is applicable to two-component polyurethane waterproof coating, mainly modified by tar; there is no uniform product standard for one component polyurethane {hottag} waterproof coating in China The national standard of polyurethane waterproof coating (GB / T 19250-2003) is modified by the relevant parts of Japan (JIS a6021-2000 building waterproof coating) The main differences between this standard and JIS A 6021-2000 are as follows: (1) except that the tensile strength of class II products is higher than that of JIS A 6021-2000, the other indexes are equivalent, and the indexes of single component class I products are equivalent to that of class II products of JIS A 6021-2000; (2) the chapter of raw materials is cancelled, and the general requirements are added; (3) only polyurethane waterproof coatings are included; (4) class I and class II products are classified according to their properties; (5) xenon arc lamp is used instead of carbon arc lamp for artificial aging, and the cumulative irradiation time of 250h is changed to the cumulative irradiation energy of 1500mj / m2 (about 720h); (6) the test items of surface drying time, solid drying time, bonding strength of wet base surface and low-temperature bending property are added; (7) the test items of high and low-temperature tensile property, tensile product, ozone aging, anti sagging and coating specific gravity are cancelled; (8) the exposed and non exposed are not distinguished according to the performance, and the artificial climate aging index is used for control; (9) the specific data of solid content is specified Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,