Fluorochemical urethane compounds having pendent silyl...

Details Fluorochemical urethane compounds having pendent silyl... Fluorochemical urethane compounds having pendent silyl...

2011-08-23

2011-08-23

Kosar, Andrew D (Department: 1622)

Compositions: coating or plastic

Coating or plastic compositions

Silicon containing other than solely as silicon dioxide or...

C556S414000

Reexamination Certificate

active

08002886

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]zwherein Rfis a fluorine-containing group, R1is the residue of a polyisocyanate. R2is of the formula —NH—CO—X1—R3(CH2CH2—S—R5—Si(Y)p(R6)3p)qwherein X1is —O— or —NR4—, where R4is H or C1-C4alkyl, R3is a polyvalent alkylene or arylene group, or combinations thereof, said alkylene groups optionally containing one or more catenary oxygen atoms, R5is a divalent alkylene group, said alkylene group optionally containing one or more catenary oxygen atoms, Y is a hydrolysable group, R6is 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.

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