| 摘要 |
PURPOSE:To obtain a polyacetal resin composition excellent in slidability such as friction and abrasion properties by mixing a specified polyacetal block polymer with a specified graft copolymer and a specified oxyalkylene adduct in a specified ratio. CONSTITUTION:The title composition is obtained by mixing 100 pts.wt. polyacetal block polymer which is derived by blocking one end of a linear polymer comprising repeating oxymethylene units with an alcohol/alkylene oxide adduct of formula I [wherein R1 and R1' are each H, (substituted) alkyl or (substituted) aryl; R2 is (substituted) alkyl or (substituted) aryl; m is 2-6; and n is 1-1000] with 0.5-25 pts.wt. graft copolymer derived by chemically combining an olefin copolymer comprising an alpha-olefin and an alpha,beta-unsaturated acid glycidyl ester with a (co)polymer consisting of repeating units of formula II (wherein R3 is H or lower alkyl; and X is a group of formula III or IV or the like), and 20 pts.wt. or below oxyalkylene adduct of formula V [wherein R4 and R5 are each H or (substituted) alkyl; R6 is a (substituted) hydrocarbon group or aliphatic or aromatic acyl; m' is 2-6; and n' is 0 or 1-2000]. |
