Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1986-09-26
1988-08-30
Briggs, Sr., Wilbert J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 71, 525 80, 525 83, 525 84, 525227, 525310, 525316, 525243, C08F25702, C08F27906
Patent
active
047678330
ABSTRACT:
A thermoplastic resin composition obtained by graft-polymerizing 95 to 50 parts by weight of a monomer mixture comprising a vinyl aromatic compound monomer and an acrylic compound monomer and optionally a vinyl cyanide compound monomer in the presence of 5 to 50 parts by weight of a rubbery substance consisting of styrene-butadiene copolymers, characterized in that the rubbery substance comprises (A) 40 to 80% by weight of a styrene-butadiene copolymer having a number-average particle diameter of at least 0.05 .mu.m and less than 0.2 .mu.m, a gel content of 30 to 100% by weight and a bound styrene content of 10 to 40% by weight and (B) 60 to 20% by weight of a styrene-butadiene copolymer having a number-average particle diameter of 0.2 to 3 .mu.m, a gel content of 10 to 80% by weight and a bound styrene content of 10 to 40% by weight and the total content of the components (A) and (B) in the rubbery substance is at least 80% by weight. Said thermoplastic resin composition is superior in chemical resistance, transparency, impact resistance and product appearance.
REFERENCES:
patent: 3845164 (1974-10-01), Goto et al.
patent: 3928495 (1975-12-01), Dalton
patent: 4334039 (1982-06-01), Dupre
patent: 4430478 (1984-02-01), Schmitt et al.
patent: 4520165 (1985-05-01), Zabrocki et al.
Itoh Tadahiko
Iwai Kazuki
Nakanishi Yoshio
Yumoto Tsunemasa
Briggs Sr. Wilbert J.
Japan Synthetic Rubber Co. Ltd.
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