Process for the after-treatment of thermoplastic fluoropolymers

Details Process for the after-treatment of thermoplastic fluoropolymers Process for the after-treatment of thermoplastic fluoropolymers

1996-12-20

1999-01-19

Teskin, Fred

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

Synthetic resins

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

5253262, 525378, 528490, 528503, C08F 830

Patent

active

058614648

ABSTRACT:
Labile end groups in fluorinated thermoplastics, in particular carboxyl and acid fluoride groups, are converted into carboxamide groups when the polymer is treated with an aqueous, ammonia-containing solution. The after-treated products have a pale color, do not cause corrosion during processing and can easily be taken from the molds in transfer molding.

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patent: 3635929 (1972-01-01), Franklin et al.
patent: 3642742 (1972-02-01), Carlson
patent: 4599386 (1986-07-01), Carlson et al.
patent: 4743658 (1988-05-01), Imbalzano et al.
patent: 4946902 (1990-08-01), Bekiarian et al.
patent: 5115038 (1992-05-01), Ihara et al.

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