Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1978-02-17
1981-02-03
Lieberman, Paul
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525104, 525130, 525911, C08F 830, C08L 7506, C08L 7508
Patent
active
042489792
ABSTRACT:
According to our invention, thermoplastic poly(vinyl chloride) block copolymer resins of the (AB).sub.n type are formed which are flexible without the addition of an external plasticizer for poly(vinyl chloride). These novel block copolymer resins have average molecular weights (Mn) in the range of from about 15,000 to 60,000 and contain alternating rigid poly(vinyl chloride) segments and flexible linear aliphatic polyether or polyester segments, each having an average molecular weight in the range of from about 1,000 to 5,000. The resins of our invention have excellent physical properties which make them suitable substitutes for externally plasticized poly(vinyl chloride) homopolymers, particularly in automotive applications.
REFERENCES:
patent: 3257476 (1966-06-01), Tobolsky
patent: 3291859 (1966-12-01), Tobolsky
patent: 3364157 (1968-01-01), Halek
patent: 3865898 (1975-02-01), Tobolsky
patent: 3935367 (1976-01-01), Merrill
patent: 4018966 (1977-04-01), Antlfinger
patent: 4093573 (1978-06-01), Ramlow
Gardlund Zachariah G.
Laverty John J.
General Motors Corporation
Grove George A.
Lieberman Paul
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