High purity fluoropolymers

Details High purity fluoropolymers High purity fluoropolymers

2006-12-12

2006-12-12

Lipman, Bernard (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S242000, C526S250000, C526S253000, C526S254000, C526S255000, C528S480000, C528S486000, C528S487000, C528S490000

Reexamination Certificate

active

07148301

ABSTRACT:
The invention relates to high purity fluoropolymers and processes for making such materials. These polymers are particularly suited for applications in the semiconductor industry. The process comprises removal of unstable polymer end groups by fluorination and removal of heavy metal impurities by extraction with an aqueous acid medium.

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