Process for the preparation of low-viscosity fluorinated rubbers

Details Process for the preparation of low-viscosity fluorinated rubbers Process for the preparation of low-viscosity fluorinated rubbers

1998-09-15

1999-10-19

Lipman, Bernard

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526222, C08F 200

Patent

active

059690640

ABSTRACT:
The present invention therefore provides a new process for the preparation of low-viscosity fluorinated rubbers, in which at least one fluorine monomer is polymerized by free radicals in the presence of one or more compounds of the formula (I) or (II) ##STR1## wherein R.sup.1 represents a fluorine atom or a perfluoroalkyl radical having 1 to 4 carbon atoms and R.sup.2 represents a perfluoroalkyl radical having 1 to 4 carbon atoms and n=4 or 5, and, optionally, a molecular weight regulator.

REFERENCES:
patent: 4243770 (1981-01-01), Tatemoto et al.
patent: 4329478 (1982-05-01), Behr
patent: 4332954 (1982-06-01), Koshar
patent: 5182342 (1993-01-01), Feiring et al.
patent: 5378782 (1995-01-01), Grootaert
patent: 5637663 (1997-06-01), Arolick et al.

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