Crystalline polyimides containing cumulative phenylene sulfide u

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

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528125, 528126, 528128, 528173, 528188, 528220, 528225, 528229, 528353, C08G 6942, C08G 7500, C08G 7902

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active

047162163

ABSTRACT:
Crystalline polyimides having low glass transition temperatures and high solvent resistance are obtained by reacting diamino-oligo-phenylene sulfides with aromatic tetracarboxylic acids or their anhydride derivatives. The diamino-oligo-phenylene sulfides can be of varying length and can be reacted with the dianhydride by conventional processes.

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N. Adrova et al., Polyimides, Progress in Materials Science Series . . . , vol. VII, Technomic Publishing Co., 1970, pp. 16-20; 86-89; 136-144.
T. St. Clair et al., Crystalline Polyimides Containing 4,4'-Bis(3,4-Dicarboxyphenoxyl)-Diphenyl Sulfide Dianhydride, Journal of Polymer Science: Polymer Chemistry Edition, vol. 15, 1977, pp. 1529-1533.

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