Perfluorocyclobutane ring-containing polymers

Details Perfluorocyclobutane ring-containing polymers Perfluorocyclobutane ring-containing polymers

1993-12-01

1994-11-15

Szekely, Peter

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526243, 526244, 526245, 526247, 526248, 526250, 526251, 526252, 526253, 526255, 528 86, 2643281, 26433111, 26433119, 26433121, C08F 1418, C08F 1220, C08F 500, B29B 700

Patent

active

053649176

ABSTRACT:
A process for preparing a polymer having perfluorocyclobutane rings by the steps of (a) contacting monomers having aromatic polyester, aromatic polyamide, or polyimide groups or combination thereof, at least two dimerizable perfluorovinyl groups; and (b) exposing the monomers to sufficient heat and for a sufficient time that a polymer containing perfluorocyclobutane rings is formed. Chain extending oligomers of polymers having poor processing characteristics by this process results in polymers which are more easily processed. For instance, perfluorocyclobutane groups formed in an extruder to chain lengthen polyimide oligomers, in effect, render polyimides extrudable. The polymer formed by the method preferably has polyimide groups. New monomers and polymers having imide and perfluorovinyl or perfluorocyclobutane structures, respectively, are prepared.

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