Process for the polymerization in aqueous dispersion of fluorina

Details Process for the polymerization in aqueous dispersion of fluorina Process for the polymerization in aqueous dispersion of fluorina

1987-04-23

1989-09-05

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526254, 526206, C08F 200

Patent

active

048640069

ABSTRACT:
A process for polymerizing or copolymerizing fluorinated monomers, in an aqueous dispersion, by using radicalic-type starters and fluorinated surfactants, characterized in that it is operated in the presence of a perfluoropolyether having neutral end groups and prepared in the form of an aqueous microemulsion, in order to increase the polymerization rate, to increase the process reproducibility and to minimize the consumption of said perfluoropolyether.

REFERENCES:
patent: 2559752 (1951-07-01), Berry
patent: 3635926 (1972-01-01), Gresham et al.
patent: 3864322 (1975-02-01), Yallourakis
patent: 4369266 (1983-01-01), Kuhls et al.
patent: 4523039 (1985-06-01), Lagow et al.
CA 100 (10): 71067w, Caporiccio et al-"Lubricating Greases"-1983.
CA 103 (6): 38672d, Nippon Mectron Co., "Polyperfluoroether Emulsion"-1985.
McCutcheon's Emulsifiers & Detergents-1982, p. 84.

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