Patent ID: 6353042
Filing Date: 2002-03-05
Classification: B32B,C08K,H01L,Y02E

Abstract:
An encapsulant material consisting essentially of:a first ethylene copolymer; a second ethylene copolymer; and an ultraviolet light stabilization additive package comprising: a first hindered amine light stabilizer providing thermal oxidative stabilization and photo-oxidative stabilization, wherein the first hindered amine light stabilizer is soluble in the first ethylene copolymer and the second ethylene copolymer and is selected from a group consisting essentially of 1,3,5-Triazine-2,4,6-triamine,N,Nâ€²â€³-[1,2-ethanedinylbis [[[4,6-bis[butyl(1,2,2,6,6-pentamethyl-4-piperidinyl)amino]-1,3,5-triazine-2-yl]amino]-3,1-propanedinyl]]-bis[Nâ€²,Nâ€³-dibutyl-Nâ€²,Nâ€³-bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-; N,Nâ€²-bis(2,2,6,6-Tetramethyl-4-piperidinyl)-1,6-hexandiamine, polymer with 2,4,6-trichloro-1,3,5-triazine and 2,4,4-trimethyl-1,2-pentamine; and N,Nâ€²-bis(2,2,6,6-Tetramethyl-4-piperidinyl)-1,6-hexandiamine polymer with 2,4,6-trichloro-1,3,5-triazine and tetrahydro-1,4-oxazine; and a second hindered amine light stabilizer providing photo-oxidative stabilization, wherein the second hindered amine light stabilizer is soluble in the first ethylene copolymer and the second ethylene copolymer and is selected from a group consisting essentially of Dimethyl succinate polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol; and propandioic acid, [(4-methoxyphenyl)-methylene]-, bis (1,2,2,6,6-pentamethyl-4-piperidinyl) ester.