Amphoteric fluorochemicals for paper
US8071489B2 · kind B2 · utility
2Cited by
16References
23Claims
0Family size
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Key dates
| Filing date | Jul 10, 2007 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Oct 4, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2287
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of imparting oil repellency to flexible, fibrous, nonwoven substrates comprising contacting the substrate with an amphoteric fluorochemical copolymer composition prepared from polymerization of monomers in the following percentages by weight: (a) from about 60% to about 90% of a fluorinated (meth)acrylate monomer of Formula 1 which is Rf-Q-CO—CR═CH2, (b) from about 10% to about 25% of an amine substituted (meth)acrylate or (meth)acylamide monomer of Formula 2 which is CH2═C(R)COZ(CH2)q(CHR)rNR2R3, and (c) from about 1% to about 15% of a substituted (meth)acrylic acid monomer of Formula 3 which is CH2=CR(R5)e—COOH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.