SURFACE TREATMENT METHOD AND SURFACE-TREATED ARTICLE

1 . A method for producing an article comprising a substrate and a layer formed of a surface-treating agent comprising a polyether group-containing silane compound on a surface of the substrate, wherein

the polyether group-containing silane compound is (α) a compound represented by formula (α1) below:

wherein

R 1 is a monovalent organic group containing a polyether chain represented by formula:

R′—(OR 2 ) a -L-

wherein (OR 2 ), is the polyether chain,

R 3 is a perfluorinated alkyl group having 1 to 6 carbon atoms, and

L is a single bond or a group represented by formula:

—(CX 121 X 122 ) o —(CX 123 X 124 ) q —

wherein X 121 to X 124 are independently H, or F,

o is an integer of 0 to 10, and

q in an integer of 1 to 10,

the polyether chain is a chain represented by

formula: —(OCF 2 CF 2 CF 2 ) m14 —

wherein m14 is an integer of 1 to 200

formula: —(OCF 2 CF 2 CF 2 CF 2 ) m13 —(OCF 2 CF 2 CF 2 ) m14 —(OCF 2 CF 2 ) m15 —(OCF 2 ) m16 —

wherein m13 and m14 are each an integer of 0 to 30, and m15 and m16 are each an integer of 1 to 200; the sum of m13 to m16 is 5 or more; and the occurrence order of each repeating unit is arbitrary,

X 1 is independently -L 2 -Si(OR 6 ) 3 ,

X is independently -L 2 -Si(OR 6 ) 3 ,

L is —CH 2 —, —C 2 H 4 —, —C 3 H 6 —, or —C 4 H 8 —, and

R 6 is independently an alkyl group having 1 to 4 carbon atoms, and

the method comprises applying the surface-treating agent to the surface of the substrate by a wet coating method.

2 . The method for producing according to claim 1 , wherein the wet coating method is a method selected from dip coating, spin coating, flow coating, spray coating, roll coating, and gravure coating.

3 . The method for producing according to claim 1 , wherein the wet coating method is spray coating.

4 . The method for producing according to claim 1 , comprising subjecting the substrate to an atmospheric pressure plasma treatment before applying the surface-treating agent to the surface of the substrate.

5 . The method for producing according to claim 4 , wherein a flow ratio of discharge gas to reactive gas used in the atmospheric pressure plasma treatment is 1:5 to 5:1.

6 . The method for producing according to claim 4 , wherein the discharge gas used in the atmospheric pressure plasma treatment is argon gas or nitrogen gas.

7 . The method for producing according to claim 4 , wherein the reactive gas used in the atmospheric pressure plasma treatment is oxygen gas.

8 . The method for producing according to claim 4 , wherein an output of the atmospheric pressure plasma treatment is 700 to 800 W.

9 . The method for producing according to claim 1 , wherein the surface-treating agent further comprises a fluoropolyether group-containing silane compound having an OCF 2 unit.

10 . The method for producing according to claim 1 , wherein the substrate is a glass substrate.

11 . The method for producing according to claim 1 , wherein the article is glass for outdoor use.

12 . The method for producing according to claim 1 , wherein the article is automotive glass.