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US 5,344,903 AGranted
Water- and oil-repellent fluoro(meth)acrylate copolymers
AssigneeE. I. Du Pont de Nemours and Company
InventorsKimberly G. Raiford, Edward J. Greenwood, Robert H. Dettre
Life of this patent
Estimating the term…
Abstract
Lower homologue perfluoroalkylethyl (meth)acrylates copolymerized with vinylidene chloride and alkyl (meth)acrylates; optionally with N-methylolacrylamide, hydroxyalkyl (meth)acrylates, and/or alkyloxy (meth)acrylates, impart high levels of water-, alcohol- and oil-repellency to fabrics under mild conditions.
Claims4
A copolymer the polymer units of which consist essentially of
- a) 50-80 weight. % of perfiuoroalkylethyl (meth)acrylates,
- b) 10-40 weight. % of a C.sub.2 -C.sub.20 alkyl (meth)acrylate,
- c) 10-40 weight. % of vinylidene chloride,
- d) 0-2 weight. % of N-methylol-acrylamide,
- e) 0-2 weight. % of 2-hydroxyethyl methacrylate and
- f) 0-5 weight. % of 2-hydroxyethyl methacrylate/ethylene oxide adduct;
- said perfluoroalkyl-ethyl (meth)acrylates being in the form of mixtures of monomers having the formula:
- CF.sub.3 CF.sub.2 (CF.sub.2).sub.k CH.sub.2 CH.sub.2 OC(O)C(R).dbd.CH.sub.2
- wherein R.dbd.H or CH.sub.3, and k is 4,6,8,10 and 12 having a distribution consisting essentially of:
- 25-70 weight % of monomers wherein k=4 or less
- 20-40 weight % of monomers wherein k=6
- 5-25 weight % of monomers wherein k=8
- 0-15 weight % of monomers wherein k=10 or greater.
10 more elements
Dependencies are inferred from the claim text.