TW356478B - ABS resin formed structure with excellent impact resistance after coating - Google Patents

Abstract

A kind of resin formed structure comprised of molten mixture of components (A) and (B) and having 19 ~ 25wt% rubberized dispersed particles converted by rubber polymer, the total weight of components (A) and (B) being 100 parts by weight, in which component (A) being 25~ 60 wt%, while component (B) being 75 ~ 40wt%; component (A) being made by the following procedures: polymerizing 100 parts by weight monomer mixture consisting of (1) 64~8 parts by weight aromatic vinyl monomer, (2) 36 ~ 12 parts by weight cyanated vinyl monomer, and 0 ~ 75 parts by weight phenylmaleic imide, and (4) 0 ~ 50 copolymerized monomers, to produce hardended polymer having weight average molecular weight of 90,000 ~ 160,000; component (B) being rubber polymer having "enveloped" rubber polymer particles and "un-evenloped" rubber polymer particles made by the following procedures: graft polymerizing rubber polymer comprised of (1) 0 ~ 100 wt% butadiene, (2) 0 ~ 40 wt% butyl acrylate, (3) 0 ~ 40wt% copolymerizable monoethyelen compound, and 0~5 wt% polymerizable polyethylene compound (the aforesaid wt% are based on the total weight (1) +(2)+(3)+(4)), with aromatic ethyelen monomer and cyanated ethylene monomer; and component (B) must meet the following conditions: (a) the weight of rubber polymer is 5 ~ 85 wt%, and the weight ratio of aromatic ethylene monomer and cyanated ethylene monomer is 64:36 ~ 80:20; (b) rubber polymer particles not having "enveloped" structure include: (b-1) small particles with size not more than 0.2<mu>m weigh 25 ~ 45wt% relative to the total weight of rubber polymer, and (b-2) medium-sized particles with size between 0.2<mu>m ~ 0.8<mu>m weight 35 ~ 55wt% relative to the total weight of rubber polymer; (c) rubber polymer particles having "enveloped" structure include: (c-1) particles with size above 0.8<mu>m weigh 5 ~ 35wt% relative to the total weight of rubber polymer, and (d) particle content ratio, if converted by rubber polymer, is (b-1)/(b-2) is in the range of 0.6 ~ 0.8, and[ (b-1) + (b-2)] / (c) is in the range of 2.5 ~ 20.0.