Impact modifier combination for aromatic polyesters

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

1996-03-27

1997-07-29

Short, Patricia A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524504, 524513, C08L 6702

Patent

active

056523068

ABSTRACT:
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 linear copolymer 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 a copolymerizable 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.

REFERENCES:
patent: 3808180 (1974-04-01), Owens
patent: 3985704 (1976-10-01), Jones et al.
patent: 4096202 (1978-06-01), Farnham
patent: 4753980 (1988-06-01), Deyrup
patent: 5248725 (1993-09-01), Koyama

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