Fluorochemical composition comprising a urethane having a fluorochemical oligomer and a hydrophilic segment to impart stain release properties to a substrate
US6239247A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Sep 24, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/8077
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a method for preparing a fluorochemical composition comprising a urethane by reacting: (A) fluorochemical oligomer of the formula (I): M.sup.f.sub.m M.sub.n --Q.sup.1 --T.sup.1 wherein M.sup.f.sub.m M.sub.n represents a fluorochemical oligomer comprising m units derived from fluorinated monomer and n units derived from fluorine-free monomer and wherein the fluorinated monomers and fluorine-free monomers may be the same or different; m is a value of about 2 to 40; n is a value of about 0 to 20; T.sup.1 is an --OH or --NH.sub.2 moiety; Q.sup.1 and T.sup.1 together represent an organic residue obtained by removing a hydrogen atom from a chain transfer agent that is functionalized with T.sup.1 ; (B) monofunctional compound capable of reacting with an isocyanate and comprising a poly(oxyalkylene) group; (C) isocyanate blocking agent or a fluorine-free oligomer; and (D) isocyanate-reactive compound other than said fluorochemical oligomer, said isocyanate blocking agent, said fluorine-free oligomer and said monofunctional compound; with (E) diisocyanate or a triisocyanate, wherein 33% to 67% of the number of isocyanate groups are reacted with the fluorochemi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.