Heat-resistant coating powder

Details Heat-resistant coating powder Heat-resistant coating powder

C - Chemistry, Metallurgy

09

D

C09D 183/04 (2006.01) C09D 133/06 (2006.01) C09D 133/08 (2006.01)

Patent

CA 2125257

A heat-resistant coating powder is comprised of A) between about 20 and about 83 wt% based on resin content of A) plus B) of a silicone resin having organic moieties selected from aryl and C1-C4 alkyl, a degree of substitution of about 1.5 or less, and an -OH content of between about 2.5 and about 7.5 wt.%, B) between about 17 wt% and about 80 wt% based on resin content of A) plus B) of an acrylic resin having an acid number of between about 20 and about 100 and a hydroxyl number of about 5 or below, and C) an acid-reactive cross-linking agent(s) at a stoichiometry of between about 70 and about 110% of the acid functionality of said acrylic resin B).

Divulgation d'une poudre de revêtement thermorésistante comprenant A) entre environ 20 et environ 83 % en poids de la teneur en résine de A) et de B), d'une résine de silicone ayant des groupements fonctionnels organiques choisis parmi les groupements aryles et alkyles en C1-4, un degré de substitution d'environ 1,5 ou moins et une teneur en -OH d'environ 2,5 à environ 7,5 % en poids, B) entre environ 17 et environ 80 % en poids de la teneur en résine de A) et de B), d'une résine acrylique ayant un indice d'acide d'environ 20 à environ 100 et un indice d'hydroxyle d'environ 5 ou moins, et C) un(des) agent(s) de réticulation réagissant aux acides ayant une stoechiométrie d'environ 70 à environ 110 % de la fonctionnalité de ladite résine acrylique B).

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