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US 2003/0191258 A1Published application
Dispersions containing perfluorovinyl ether homopolymers and use thereof
Assignee3M Innovative Properties Company
InventorsLian S. Tan, Richard S. Buckanin, E. Steven McAlister
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Abstract
The present invention provides a method of preparing an aqueous dispersion of poly(perfluorovinyl ether)homopolymers. The present invention further relates to a method of making an aqueous fluoropolymer dispersion comprising bicomponent particles of poly(perfluorovinyl ether)homopolymers and a second fluoropolymer. The dispersions of the present invention may be used for rendering fibrous substrates oil repellent, water repellent and/or stain repellent.
Claims28
A method of making a poly(perfluorovinyl ether) homopolymer dispersion comprising the steps of:
- a. pre-emulsifying an aqueous mixture of a perfluorovinyl ether in the presence of a fluorochemical emulsifier to an average emulsion droplet size of one micron or less, and
- b. polymerizing said perfluorovinyl ether in the presence of an initiator at temperature and for a time sufficient to produce particles of poly(perfluorovinyl ether).
Dependencies are inferred from the claim text.