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US 5,326,823 AGranted
Polyfluoropolyether graft copolymers
AssigneeMinnesota Mining and Manufacturing Company
InventorsRichard J. Rolando, Anthony B. Clinch
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Abstract
A fluorochemical graft copolymer comprising: a base polymer comprising polymerized units derived from monomers having terminal olefinic double bonds, having grafted thereto a plurality of polyfluoropolyether groups, Also disclosed is a process for preparing such a graft copolymer, and a method for reducing the surface energy of a polymer comprising polymerized units derived from monomers having terminal olefinic double bonds.
Claims14
A fluorochemical graft copolymer comprising:
- a base polymer comprising polymerized units derived from monomers having terminal olefinic double bonds, having grafted thereto a plurality of polyfluoropolyether monomer units, said fluorochemical graft copolymer being prepared according to the process comprising the steps of:
- (1) feeding to a reactor in an inert atmosphere materials comprising:
- (a) a base polymer comprising polymerized units derived from monomers having terminal olefinic double bonds;
- (b) (i) at least one free radical initiator and a polyfluoropolyether monomer having a backbone comprising polyfluorooxyalkylene units, the monomer being terminated on at least one end with a functional group comprising a polymerizable double bond;
- and wherein all materials are substantially free of oxygen;
- or
- (b) (ii) a peroxidic polyfluoropolyether;
- (2) reacting the materials in the reactor to provide the fluorochemical graft copolymer;
- and
- (3) withdrawing the fluorochemical graft copolymer from the reactor.
7 more elements
Dependencies are inferred from the claim text.