Patent ID: 6583203
Filing Date: 2003-06-24
Classification: C08G,C08L

Abstract:
A branched polyacetal resin composition, comprising:(A) 100 parts by weight of a branched polyacetal copolymer which is the copolymeriziation reaction product of: (a) 100 parts by weight of trioxane, (b) 0.001 to 10 parts by weight of a monofunctional glycidyl compound, and (c) 0.1 to 20 parts by weight of a cyclic ether compound which is copolymerizable with trioxane, wherein said branched polyacetal copolymer has an oxymethylene group as the main repeating unit and a branching unit represented by the following formula (I): â€ƒwherein m and n each is an integer of 0 to 5; the sum of m+n is 1 to 5; and R is a monovalent organic group having a molecular weight of 40 to 1000; (B) 0.01 to 5 parts by weight of a weather (light) resistant stabilizer; and (C) 0.01 to 5 parts by weight of a hindered amine substance; and wherein the monofunctional glycidyl compound (b) is selected from the glycidyl ether compounds represented by the following formulae (II), (III) and (IV): â€ƒwherein R1 is a C1-12 alkyl group, a substituted alkyl group, an alkoxy group, an aryl group, a substituted aryl group or halogen; and n is an integer of 0 to 5 and, when n is 2 or more, the R1s may be the same or different: â€ƒwherein R2 is a C1-30 alkylene group, a substituted alkylene group or a polyalkylene oxide glycol residue; R3 is a C1-12 alkyl group, a substituted alkyl group, an alkoxy group, an aryl group, a substituted aryl group or halogen; and n is an integer of 0 to 5 and, when n is 2 or more, the R3s may be the same or different: â€ƒwherein R4 is a C1-30 alkylene group; n is an integer of 0 to 20; and R5 is a C1-30 alkyl group, a C2-20 alkenyl group or an alkynyl group.