Fluoropolyether-containing polymer-modified silane, surface treating agent, and treated article

Patent metadata

Field	Value
Publication number	US-2016304665-A1
Application number	US-201615096432-A
Country	US
Kind code	A1
Filing date	Apr 12, 2016
Priority date	Apr 20, 2015
Publication date	Oct 20, 2016
Grant date	—

Abstract

A fluoropolyether-containing polymer-modified silane has general formula (1)

wherein Rf is a monovalent fluorooxyalkyl or divalent fluorooxyalkylene-containing polymer residue, Y is a divalent to hexavalent hydrocarbon group which may have a silicon atom and/or a siloxane bond, W is a divalent to hexavalent hydrocarbon group which may have a silicon atom and/or a siloxane bond, R is independently an alkyl of 1 to 4 carbon atoms or phenyl, X is independently hydroxyl or a hydrolyzable group, the letters n, a and m are respectively integers from 1 to 3, 1 to 5 and 1 to 5, and α is 1 or 2. A surface treating agent containing this silane and/or a partial (hydrolytic) condensate thereof, when applied to an article, forms a coat of excellent water/oil repellency and abrasion resistance.

First claim

1 . A fluoropolyether-containing polymer-modified silane having general formula (1)

wherein Rf is a monovalent fluorooxyalkyl or divalent fluorooxyalkylene-containing polymer residue,
Y is a divalent to hexavalent hydrocarbon group which may have a silicon atom and/or a siloxane bond,
W is a divalent to hexavalent hydrocarbon group which may have a silicon atom and/or a siloxane bond,
R is independently an alkyl group of 1 to 4 carbon atoms or a phenyl group,
X is independently a hydroxyl group or a hydrolyzable group,
n is an integer from 1 to 3,
a is an integer from 1 to 5,
m is an integer from 1 to 5, and
α is 1 or 2.

2 . The polymer-modified silane of claim 1 , wherein α in formula (1) is 1 and Rf is a moiety of general formula (2)
F—(CF 2 O) p —(C 2 F 4 O) q —(C 3 F 6 O) r —(C 4 F 8 O) s —C d F 2d —  (2)

wherein p, q, r and s are each an integer from 0 to 200, the sum p+q+r+s=3 to 200, each recurring unit may be linear or branched, individual recurring units may be randomly arranged, d is an integer from 1 to 3, and the C d F 2d unit may be linear or branched.

3 . The polymer-modified silane of claim 1 , wherein α in formula (1) is 2 and Rf is a moiety of general formula (3)
—C d F 2d —O—(CF 2 O) p —(C 2 F 4 O) q —(C 3 F 6 O) r —(C 4 F 8 O) s —C d F 2d —  (3)

wherein p, q, r and s are each an integer from 0 to 200, the sum p+q+r+s=3 to 200, each recurring unit may be linear or branched, individual recurring units may be randomly arranged, d is an integer from 1 to 3, and the C d F 2d units may be linear or branched.

4 . The polymer-modified silane of claim 1 wherein, in formula (1), Y is selected from the group consisting of alkylene groups of 3 to 10 carbon atoms, alkylene groups of 2 to 8 carbon atoms containing an arylene group of 6 to 8 carbon atoms, divalent groups having alkylene groups of 2 to 8 carbon atoms bonded to each other via a C 1 -C 4 silalkylene or C 6 -C 10 silarylene structure, and divalent to tetravalent groups having an alkylene group of 2 to 10 carbon atoms bonded at a valence position on a divalent to tetravalent organopolysiloxane residue that is linear and has 2 to 10 silicon atoms or is branched or cyclic and has 3 to 10 silicon atoms.

5 . The polymer-modified silane of claim 1 wherein, in formula (1), W is selected from the group consisting of alkylene groups of 2 to 10 carbon atoms, alkylene groups of 2 to 8 carbon atoms containing an arylene group of 6 to 8 carbon atoms, alkylene groups of 2 to 6 carbon atoms containing a diorganosilylene group, divalent groups having alkylene groups of 2 to 8 carbon atoms bonded to each other via a C 1 -C 4 silalkylene or C 6 -C 10 silarylene structure, and divalent to tetravalent groups having an alkylene group of 2 to 10 carbon atoms bonded at a valence position on a divalent to tetravalent organopolysiloxane residue that is linear and has 2 to 10 silicon atoms or is branched or cyclic and has 3 to 10 silicon atoms.

6 . The polymer-modified silane of claim 1 wherein, in formula (1), each X is independently selected from the group consisting of hydroxyl, alkoxy groups of 1 to 10 carbon atoms, alkoxyalkoxy groups of 2 to 10 carbon atoms, acyloxy groups of 1 to 10 carbon atoms, alkenyloxy groups of 2 to 10 carbon atoms, and halogen groups.

7 . The polymer-modified silane of claim 1 which has any one of the following formulas:

wherein p1 is an integer from 5 to 100, q1 is an integer from 5 to 100, and the sum p1+q1 is an integer from 10 to 105.

8 . A surface treating agent comprising the polymer-modified silane of claim 1 and/or a partial (hydrolytic) condensate thereof.

9 . An article surface-treated with the surface treating agent of claim 8 .

Assignees

• Shinetsu Chemical Co

Inventors

• Sakoh Ryusuke
• Matsuda Takashi
• Yamane Yuji

Classifications

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C08G65/007 Primary

  containing fluorine · CPC title

• C08G65/336

  containing silicon · CPC title

• C08G77/12

  containing silicon bound to hydrogen · CPC title

• C08G2650/48

  containing fluorine, e.g. perfluropolyethers · CPC title