TH41558B - The steel plate is colored with good weather resistance. And production process - Google Patents

Abstract

DC60 (17/01/57) What is revealed is a weather resistant colored steel plate consisting of a steel plate as a backing. Galvanized layer or zinc alloy on steel sheet coating layer of chromate or non-chromate substance based on zinc layer or zinc alloy and resistant film Air is good on the chromate or non-chromate coating. In a weather-resistant film, there is a pre-coating made of polyester on top of a chromate or non-chromate coat and a top coat of polyester on top of a pre-coating. Made of polyester, the top layer of polyester coating is produced from a mixture of base resins obtained by the reaction of non-resin. Polyester modified oils and polyisocyanate melamine resin compounds as coupling agents and other additives. Physical properties of galvanized color steel sheet or zinc alloy resistant to Weather Well (WDP) is excellent in terms of functionality. such as weather resistance and resistance to ultraviolet light Compared with color steel plate Generally modified (RMP) weather resistant (HDP) and silicone modified (SMP). Weather Well (WDP) is cheap compared to fluorine resin steel sheet. and has much less color effect and has intrinsic properties comparable to fluorine resin steel sheet. What is revealed is a weatherproof colored steel plate consisting of a steel plate as a backing. Galvanized layer or zinc alloy on steel sheet coating layer of Chromate or non-chromate substance based on zinc layer or zinc alloy. and resistant film Air is good on the chromate or non-chromate coating layer. In a weather-resistant film, there is a preliminary coating made of polyester coated on a chromate or non-chromate coating layer, and a final polyester coating on the coating layer. Primarily made of polyester, the top coat of polyester is produced from a mixture of base resins obtained by the reaction of non-resin. Polyester modified oil and polyisocyanate compound Melamine resin as a binding agent and other fillers. Physical properties of galvanized color steel sheet or resistant zinc alloy Weather Well (WDP) is excellent in terms of functionality. such as weather resistance and resistance to ultraviolet light Compared with color steel plate Generally modified (RMP) weather resistant (HDP) and silicone modified (SMP). Weather Well (WDP) is cheap compared to fluorine resin steel sheet. and has much less color effect and has intrinsic properties comparable to fluorine resin steel sheet.

Claims (6)

1.Color steel plate with good weather resistance, consisting of 1 steel plate as support. Zinc layer or zinc alloy 2 is coated on steel plate 1 layer 3 is coated on galvanized layer or zinc alloy 2 and is chromate or Non chromate and 10 weather resistant film are on the coating layer. Chromate or non-chromate 3 in a weatherproof film 10 including a primary coating 4 made of polyester. Coat on the chromate layer Or not chromate 3 and top coat Polyester 5 top coat 4 layer polyester primary coat 5 top coat 5 made from a mix of resins The core is obtained from the reaction of oil-free resins modified from polyester and It consists of polyisocyanate, melamine resin as the connecting agent. And other fillers 2. Color steel plate with good weather resistance according to claim 1, in which oil-free resin The polymer resin has an average molecular weight of 1000 - 9000, a glass transition temperature (Tg) -5-45 degrees Celsius, and an OH group number 15-150. 3.Colored steel plate with good weather resistance according to claim 1, containing compound Isocyanates are 5-30 parts by weight by solid resin. 4.Colored steel plate with good weather resistance according to claim 1, containing 4-10 parts melamine resin by weight by weight of the top coat 5. 5. Weather resistant colored steel sheet according to claims 1 to 4, where the coating layer 3 has a density of 20-80 mg / m3 and the primary coating layer 4 has a dry film thickness 4. - 7 micrometers and top layer 5 pilasters with dry film thickness 15 - 22 micrometers. 6. Method for producing weather-resistant colored steel consists of a chromate or non-chromate coating process on a galvanized layer or zinc alloy 2 at a linear speed of 60 - 120 m / min and bake. Dry the chromate or non-chromate layer at 60-140 ° C to form a coating layer 3, create a pre-coating layer 4, rotate coating, top coat 5 with the reactive primary resin. Of wrought oil-free resins Converted from polyesters and polyisocyanate compounds, melamine resin to the coupling agent. And other fillers on the primary coating 4 made of polyester and heated and baked, the coated structure rotates at a maximum metal temperature of 190 - 240 ° C for Create a film that is resistant to good weather conditions 10