Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From sulfur-containing reactant
Patent
1993-08-30
1994-04-19
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From sulfur-containing reactant
528354, 528356, 528359, 525537, C08G 7514
Patent
active
053046293
ABSTRACT:
Disclosed herein are a process for the preparation of a carboxylated arylene thioether oligomer, in which an alkali metal sulfide is caused to act on a poly(arylene thioether) so as to depolymerize the poly(arylene thioether), thereby preparing an alkali thiolate-containing oligomer, and a carboxylating agent is then caused to act on the alkali thiolate-containing oligomer, thereby forming the carboxylated arylene thioether oligomer, and a process for the production of an arylene thioether copolymer, wherein the carboxylated arylene thioether oligomer alone, which has been obtained in accordance with this preparation process, or a mixture of the carboxylated oligomer in an amount of at least 50 wt. % and another carboxylic compound in an amount less than 50 wt. % is reacted with an alkylenediol or an alkylenediol and a polyester or an alkylene diol and a lactone.
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G. Daccord et al, ".alpha.-{Difunctionalized Poly(p-thiophenylene) Oligomers 1.Synthesis and Properties", Polymer Bulletin 4, pp. 459-466 (1981).
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Chemical Abstracts, 1986, 105, No. 227349F dated Dec. 29, 1986.
Hoshino Mitsuru
Kawakami Yuichika
Sato Hiroyuki
Bleutge John C.
Kureha Kagaku Kogyo K.K.
Lee Helen F.
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