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

Patent metadata

Field	Value
Publication number	US-10196483-B2
Application number	US-201615141991-A
Country	US
Kind code	B2
Filing date	Apr 29, 2016
Priority date	May 1, 2015
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A fluoropolyether-containing polymer-modified silane having formula (1) is provided wherein Rf is a fluorooxyalkyl or fluorooxyalkylene-containing polymer residue, Y is a divalent to hexavalent hydrocarbon group, R and R′ are C 1 -C 4 alkyl or phenyl, X and X′ are hydroxyl or a hydrolyzable group, n is an integer of 1 to 3, a is an integer of 0 to 3, m is an integer of 1 to 5, and α is 1 or 2. A surface treating agent comprising the silane has storage stability and cures into a water/oil repellent layer having weatherability.

First claim

The invention claimed is:

1. An article which is surface treated with a surface treating agent, comprising a fluoropolyether-containing polymer-modified silane having formula (1):

wherein Rf is a monovalent fluorooxyalkyl or divalent fluorooxyalkylene-containing polymer residue, Y is a divalent to hexavalent hydrocarbon group which may contain a siloxane bond or a silylene group, R and R′ are each independently a C 1 -C 4 alkyl group or phenyl group, X and X′ are each independently a hydroxyl or hydrolyzable group, n is an integer of 1 to 3, a is an integer of 0 to 3, m is an integer of 1 to 5, and α is 1 or 2,
the surface treating agent further comprising a fluorine-modified solvent, and the fluoropolyether-containing polymer-modified silane represented by formula (1) being contained at a concentration of 0.01 to 30% by weight based on the total weight of the fluorine-modified solvent and the fluoropolyether-containing polymer-modified silane.

2. The article of claim 1 , wherein α in formula (1) is 1, and Rf is a group having the 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 t F 2t )—  (2)

wherein p, q, r and s are each independently an integer of 0 to 200, the sum p+q+r+s is 3 to 200, t is an integer of 1 to 3, each repeating unit may be linear or branched, and individual repeating units may be randomly arranged.

3. The article of claim 1 , wherein a in formula (1) is 2, and Rf is a group having the general formula (3):
—(C t F 2t )—O—(CF 2 O) p —(C 2 F 4 O) q —(C 3 F 6 O) r —(C 4 F 8 O) s —(C t F 2t )—  (3)

wherein p, q, r and s are each independently an integer of 0 to 200, the sum p+q+r+s is 3 to 200, t is an integer of 1 to 3, each repeating unit may be linear or branched, and individual repeating units may be randomly arranged.

4. The article of claim 1 , wherein Y in formula (1) is selected from the group consisting of a C 3 -C 10 alkylene group, a C 8 -C 16 alkylene group containing phenylene, a divalent group having C 2 -C 10 alkylene groups bonded via a silalkylene or silarylene structure, and a divalent to tetravalent group having C 2 -C 10 alkylene groups bonded to a divalent to tetravalent, linear organopolysiloxane residue of 2 to 10 silicon atoms or branched or cyclic organopolysiloxane residue of 3 to 10 silicon atoms.

5. The article of claim 1 , wherein X and X′ each in formula (1) are selected from the group consisting of hydroxyl, C 1 -C 10 alkoxy group, C 2 -C 10 alkoxyalkoxy group, C 1 -C 10 acyloxy group, C 2 -C 10 alkenyloxy group, and halogen.

6. The article of claim 1 , wherein the polymer-modified silane having formula (1) is selected from compounds having the following formulae:

wherein p1 is an integer of 5 to 100, q1 is an integer of 5 to 100, and p1+q1 is an integer of 10 to 105.

Assignees

• Shinetsu Chemical Co

Inventors

• Sakoh Ryusuke
• Matsuda Takashi
• Yamane Yuji

Classifications

• C09D171/02

  Polyalkylene oxides · CPC title

• C09D171/00

  Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain (based on polyacetals C09D159/00; based on epoxy resins C09D163/00; based on polythioether-ethers C09D181/02; based on polyethersulfones C09D181/06); Coating compositions based on derivatives of such polymers · CPC title

• C09D5/1662

  Synthetic film-forming substance · CPC title

• C08G2650/48

  containing fluorine, e.g. perfluropolyethers · CPC title

• C08G2650/04

  End-capping · CPC title