Low temperature impact resistant resin composition

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 51/00 (2006.01) C08L 55/02 (2006.01) C08L 67/00 (2006.01) C08L 67/02 (2006.01)

Patent

CA 2073362

- ? - ABSTRACT A low temperature impact resistant resin composition comprising the following components (A) to (C) and, if required, the following component (D), wherein the proportions of the respective components are from 20 to 80% by weight of component (A), from 0.01 to 30% by weight of component (B), from 19.99 to 79.99% by weight of component (C) and from 0 to 20% by weight of component (D): (A) an aromatic polyester resin; (B) a polyether ester block copolymer resin; (C) a rubber-reinforced styrene-type graft copolymer resin composition which is obtained by emulsion-polymerizing a styrene monomer and a vinyl cyanide monomer, and, if required, an ethylenically unsaturated monomer copolymerizable therewith, in the presence of a conjugated diene polymer latex, by the action of a polymerization initiator and which satisfies the following requirements (1) to (4): (1) the weight average particle size of the conjugated diene polymer in the latex: from 0.20 to 1.0 µm; (2) the weight ratio R of the conjugated diene polymer in the graft copolymer resin composition: from 0.35 to 0.80; (3) the weight average molecular weight of the soluble component when the graft copolymer resin - ? - composition is subjected to extraction with acetone at room temperature: from 150,000 to 450,000; (4) the graft ratio Gr defined by the following formula (F1) must satisfy the following formula (F2) defining the relation to the above weight ratio R of the conjugated diene polymer: (F1) Image (F2) where X is the weight of the graft copolymer resin sample, Y is the weight of the room temperature acetone- insoluble component in X, and R is the weight ratio of the conjugated diene polymer in the graft copolymer resin composition; (D) a copolymer comprising from 60 to 80% by weight of an aromatic vinyl monomer component, from 0 to 40% by weight of a vinyl cyanide monomer component and from 0 to 40% by weight of an ethylenically unsaturated monomer copolymerizable therewith.

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