Impact modifier combination for aromatic polyesters

Details Impact modifier combination for aromatic polyesters Impact modifier combination for aromatic polyesters

C - Chemistry, Metallurgy

08

L

C08L 9/00 (2006.01) C08L 33/12 (2006.01) C08L 67/00 (2006.01) C08L 67/02 (2006.01) C08L 23/08 (2006.01) C08L 51/04 (2006.01)

Patent

CA 2173665

An improved toughened blend of an aromatic polyester with from 5 to 20 phr of an impact modifier, which impact modifier is a blend of (a) 80 to 85 weight percent of a core/shell impact modifier having a polybutadiene core and at least one shell formed from methyl methacrylate and styrene; and (b)15 to 20 weight percent of a linearcopolymer which contains from 50 to 85 parts of units derived from ethylene, from 5 to 40 parts of units derived from (meth)acrylic esters, and from 2 to 10 parts of acopolymerizable monomer containing an epoxy group. The toughened blend exhibits higher impact strength than would be calculated for the blend using a linear relationship based on values of notched Izod for two blends, each containing only one of the impact modifiers at an equal use level.

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