Patent ID: 9206295
Filing Date: 2015-12-08
Classification: B32B,C08G,C08J,C09D,C09J,H01L,Y02E,Y10T

Abstract:
1. A backside cover for solar modules or laminates for backside covers of solar modules comprising white coated polyester film comprising polyester and a coating on at least one of surface of said film, said coating comprising at least one polyurethane and at least one crosslinker, wherein the crosslinker is a polymer comprising an oxazoline group comprising comonomer consisting of one or more of: methacrylic esters, unsaturated carboxylic acids, unsaturated amides, vinyl esters, vinyl ethers, alpha-olefins, or halogenated alpha,beta-unsaturated compounds, wherein said polymer with oxazoline groups has a glass transition temperature from about 20 to 95° C.; wherein the weight percent of said polymer with oxazoline group is from 25 to 75 and the corresponding weight percent of said polyurethane is from 75 to 25, said polyester film is a biaxially oriented polyester film the dried coating on the polyester film has a thickness of 5 to 500 nm, the polyurethane coated-side of said film is adhered directly to ethylene-vinyl acetate (EVA) such that the polyurethane is in direct contact with said EVA, and said film exhibits an adhesion of the coated surface to EVA, expressed as the force required to separate a laminate composed of the film and EVA, coated side against EVA at an angle of 180°, of >50 N/15 mm.