| 摘要 |
Polyester resin compositions exhibiting excellent impact resistance and moldability are disclosed comprising: (a) 80 to 40 parts by weight of a polyethylene terephthalate type polyester [component (a)]; (b) 20 to 60 parts by weight of a poly(1,4-butylene terephthalate) type polyester [component (b)]; (c) a metal salt of a copolymer consisting essentially of an alpha -olefin, an alpha , beta -unsaturated carboxylic acid and optionally, a third vinyl comonomer, wherein said alpha , beta -unsaturated carboxylic acid is present in said copolymer in an amount of 1 to 30 mole percent and at least 20 mole percent of the carboxyl groups contained in said copolymer are in the form of monovalent to trivalent metal salts [component (c1)]; said resin composition optionally further containing a poly( alpha -olefin) type copolymer, a block copolyetherester elastomer and/or a reinforcing filler.
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