Process for the preparation of thermoplastic poly(hydroxy ethers

Details Process for the preparation of thermoplastic poly(hydroxy ethers Process for the preparation of thermoplastic poly(hydroxy ethers

1993-10-13

1995-03-28

Krass, Frederick

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528 89, 528104, C08G 6528

Patent

active

054018145

ABSTRACT:
Poly(hydroxy ethers) are prepared by reacting a dihydric phenol with a diepoxide in the presence of a catalyst selected from the group consisting of bis(trihydrocarbylphosphoranylidene)ammonium salt, bis[tris(dihydrocarbylamino)phosphoranylidene]ammonium salt, and tetrakis[tris(dihydrocarbylamino)phosphoranylideneamino]phosphonium salt. The reaction between the dihydric phenol and the diepoxide is conducted in an ether or hydroxy ether solvent at a temperature sufficiently high to produce a poly(hydroxy ether). Polymers prepared by the new process are more highly branched than those produced by known methods.

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