Patent ID: 9434853
Filing Date: 2016-09-06
CPC Classification: C08K,C08L,C09D

Claim Text:
1. A heat-curable powder coating composition comprising: i) at least one crystalline polyester resin present in an amount of at least 7.5 wt %; ii) at least one amorphous polyester resin present in an amount of at most 92.5 wt % ; and iii) at least one peroxide present in an amount of at least 0.65 parts of peroxide in hundred parts of i)+ii) (pph), wherein, the composition contains no crosslinking agent; and wherein the at least one crystalline polyester resin and/or the at least one amorphous polyester resin has 2-butenedioic acid ethylenic unsaturations, and wherein the at least one crystalline polyester resin has a melting temperature (T if the at least one amorphous polyester resin has 2-butenedioic acid ethylenic unsaturations, then the theoretical weight per ethylenic unsaturation (WPU) of the at least one amorphous polyester resin is at most 850 g/mol; each of T the wt % is based on the total amount of i)+ii); and wherein the peroxide is at least one selected from the group consisting of: (a) peresters and monopercarbonates according to formula (I)  wherein (b) peranhydrides of formula (II)  wherein R (c) any combination of peroxides according to formula (I) and formula (II) thereof.