Fluorochemical urethane compounds having pendent silyl groups used for surface treatment
US8002886B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2007 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Mar 16, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/1804
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Fluorochemical urethane compounds and coating compositions derived therefrom are described. The compounds and composition may be used in treating substrates, in particular substrates having a hard surface such as ceramics or glass, to render them water, oil, stain, and/or dirt repellent. The compounds have the formula (Rf)xR1—(R2)y]z wherein Rf is a fluorine-containing group, R1 is the residue of a polyisocyanate. R2 is of the formula —NH—CO—X1—R3(CH2CH2—S—R5—Si(Y)p(R6)3p)q wherein X1 is —O— or —NR4—, where R4 is H or C1-C4 alkyl, R3 is a polyvalent alkylene or arylene group, or combinations thereof, said alkylene groups optionally containing one or more catenary oxygen atoms, R5 is a divalent alkylene group, said alkylene group optionally containing one or more catenary oxygen atoms, Y is a hydrolysable group, R6 is a monovalent alkyl or aryl group, p is 1, 2 or 3, q is 1 to 5, x and y are each independently at least 1, and z is 1 or 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.