Block copolymer and compositions

Details Block copolymer and compositions Block copolymer and compositions

1990-03-14

1992-04-07

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525537, 528388, C08L 8100, C08F28300, C08G 7500

Patent

active

051029472

ABSTRACT:
A block copolymer composed of polyphenylene sulfide segments and aromatic sulfide sulfone polymer segments and having a logarithmic viscosity [.eta.], determined at 206.degree. C. for its solution in alpha-chloronaphthalene in a polymer concentration of 0.4 g/100 ml of solution and calculated in accordance with the equation [.eta.]=ln (relative viscosity)/polymer concentration, of 0.03 to 1.0. A resin composition comprising the block copolymer and polyphenylene sulfide and/or an aromatic sulfide sulfone polymer and optionally a filler. The block copolymer and the resin composition have improved mechanical strength and are suitable, for example, for encapsulation of electronic component parts.

REFERENCES:
patent: 4440915 (1984-04-01), Asakura et al.
patent: 4654410 (1987-03-01), Kashiwame et al.
patent: 4659789 (1987-04-01), Katto et al.
patent: 4678831 (1987-07-01), Kawabata et al.
patent: 4785057 (1988-11-01), Shiiki et al.
patent: 4946912 (1990-08-01), Kawabata et al.

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