Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1984-10-11
1986-06-03
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528125, 528126, 528128, 528175, 528176, 528179, 528180, 528181, 528193, 528194, C08G 7523
Patent
active
045930864
ABSTRACT:
A process for producing aromatic ketone-sulfone copolymers which comprises polymerizing appropriate monomers by a Friedel-Crafts polymerization reaction using a Lewis acid catalyst. A controlling agent such as a Lewis base is added to the reaction medium. The reaction medium comprises, for example, aluminum trichloride as the Lewis acid, an organic Lewis base such as N,N-dimethylformamide or an inorganic Lewis base such as sodium or lithium chloride as the controlling agent, and a diluent such as methylene chloride or 1,2-dichloroethane. The amount of Lewis acid, the amount of Lewis base, the temperature of the reaction and the monomer to diluent molar ratio are varied depending on the monomer system to obtain melt-processable, high molecular weight, substantially linear polymers, for example prepared from copolymerization of p-phenoxybenzoyl chloride and p-phenoxybenzenesulfonyl chloride or of terephthaloyl chloride, 1,4-benzenedisulfonyl chloride and diphenyl ether, or of like monomers.
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Gors Heinrich C.
Jansons Viktors
Burkard Herbert G.
Lee Lester L.
Raychem Corporation
Rice Edith A.
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