Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-07-11
1999-11-23
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C08L 900
Patent
active
059902400
ABSTRACT:
A rubber-containing resin composition suitable as an impact modifier for styrene resins (such as styrene homopolymer and copolymers and polymer alloys thereof with other thermoplastic resins), which comprises (A) a graft copolymer having a graft ratio of 10 to 80% by weight wherein a graft component comprising 15 to 60% by mole of at least one vinyl cyanide compound, 40 to 85% by mole of at least one aromatic vinyl compound and 0 to 30% by mole of at least one other monomer copolymerizable with them is graft-copolymerized onto a diene rubber having a volume average particle size of 100 to 1,000 nm by an emulsion polymerization method, and (B) an emulsion-polymerized copolymer of 15 to 60% by mole of at least one vinyl cyanide compound, 40 to 85% by mole of at least one aromatic vinyl compound and 0 to 30% by mole of at least one other monomer copolymerizable with them, which has a weight average molecular weight of 5,000 to 90,000 and a ratio of weight average molecular weight to number average molecular weight of 1.5 to 4.5, in which the ratio of the graft copolymer (A) to the copolymer (B) is from 50/50 to 95/5 by weight. A styrene resin composition comprising the rubber-containing resin composition and a styrene resin provides molded articles having excellent properties such as impact resistance, mechanical property, heat resistance and surface appearance with good processability.
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Hashimoto Yoshihiko
Matsumoto Shigemi
Matsumura Yo-ichi
Mishima Ikuhiro
Kaneka Corporation
Michl Paul R.
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