Water/oil repellent composition and article

Patent metadata

Field	Value
Publication number	US-9340719-B2
Application number	US-201514611817-A
Country	US
Kind code	B2
Filing date	Feb 2, 2015
Priority date	Aug 1, 2012
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

It is possible to obtain a porous substrate having a water/oil repellent-treated surface and a moisture-permeable waterproofing film, which has favorable water/oil repellency and wash durability, through which penetration of a coating liquid for formation of the moisture-permeable waterproofing film is suppressed, and from which peeling of the moisture-permeable waterproofing film is suppressed. A water/oil repellent composition comprising a copolymer (A) having from 60 to 95 mass % of units based on a monomer having a R F group having at most 6 carbon atoms and from 5 to 40 mass % of units based on vinylidene chloride, a copolymer (B) having from 50 to 95 mass % of units based on a halogenated olefin and from 5 to 50 mass % of units based on a monomer having a crosslinkable functional group, and a medium (C), wherein the proportion of the copolymer (A) is from 70 to 90 mass %, and the proportion of the copolymer (B) is from 10 to 30 mass %.

First claim

What is claimed is:

1. A water/oil repellent composition which comprises a copolymer (A) having from 60 to 95 mass % of units based on the following monomer (a1) and from 5 to 40 mass % of units based on the following monomer (a2),
a copolymer (B) having from 50 to 95 mass % of units based on the following monomer (b1) and from 5 to 50 mass % of units based on the following monomer (b2), and
a medium (C),

wherein the proportion of the copolymer (A) is from 70 to 90 mass %, and the proportion of the copolymer (B) is from 10 to 30 mass % relative to the total amount (100 mass %) of the copolymer (A) and the copolymer (B):
monomer (a1): a compound represented by the following formula (1):
(Z—Y) n X  (1)

wherein Z is a C 1-6 polyfluoroalkyl group or a group represented by the following formula (2), Y is a bivalent organic group having no fluorine atom, or a single bond, n is 1 or 2, and X is, when n is 1, any one of the groups represented by the following formulae (3-1) to (3-5) and, when n is 2, any one of the groups represented by the following formulae (4-1) to (4-4):
C i F 2i+1 O(CFX 1 CF 2 O) j CFX 2 —  (2)

wherein i is an integer of from 1 to 6, j is an integer of from 0 to 10, and each of X 1 and X 2 is a fluorine atom or a trifluoromethyl group;
—CR 2 ═CH 2   (3-1)

—C(O)OCR 2 ═CH 2   (3-2)

—OC(O)CR 2 ═CH 2   (3-3)

—OCH 2 —φ—CR 2 ═CH 2   (3-4)

—OCH═CH 2   (3-5)

wherein R 2 is a hydrogen atom, a methyl group or a halogen atom, and φ is a phenylene group;
—CH[—(CH 2 ) m CR 3 ═CH 2 ]—  (4-1)

—CH[—(CH 2 ) m C(O)OCR 3 ═CH 2 ]—  (4-2)

—CH[—(CH 2 ) m OC(O)CR 3 ═CH 2 ]—  (4-3)

—OC(O)CH═CHC(O)O—  (4-4)

where R 3 is a hydrogen atom, a methyl group or a halogen atom, and m is an integer of from 0 to 4;
monomer (a2): vinylidene chloride;
monomer (b1): a halogenated olefin; and
monomer (b2): a monomer having no polyfluoroalkyl group and having a crosslinkable functional group.

2. The water/oil repellent composition according to claim 1 , wherein Z is a C 4-6 perfluoroalkyl group.

3. The water/oil repellent composition according to claim 1 , wherein Y is a C 2-4 alkylene group, n is 1, and X is a group represented by the formula (3-3).

4. The water/oil repellent composition according to claim 1 , wherein the copolymer (A) further has units based on the following monomer (a3):
monomer (a3): a monomer having no polyfluoroalkyl group and having a crosslinkable functional group.

5. The water/oil repellent composition according to claim 4 , wherein the crosslinkable functional group in the monomer (a3) is a hydroxyl group, a blocked isocyanate group, an amino group, a N-hydroxymethylamide group, an epoxy group or a carboxy group.

6. The water/oil repellent composition according to claim 4 , wherein the copolymer (A) has from 65 to 89.9 mass % of the units based on the monomer (a1), from 10 to 34.9 mass % of the units based on the monomer (a2) and from 0.1 to 25 mass % of the units based on the monomer (a3).

7. The water/oil repellent composition according to claim 1 , wherein the monomer (b1) is vinyl chloride.

8. The water/oil repellent composition according to claim 1 , wherein the copolymer (B) further has units based on a monomer (b3) which is a monomer other than the monomer (b1) and the monomer (b2).

9. The water/oil repellent composition according to claim 8 , wherein the monomer (b3) is the monomer (a1) or a monomer having a C 1-22 alkyl group.

10. The water/oil repellent composition according to claim 8 , wherein the proportion of the units based on the monomer (b3) is from 2 to 40 mass % relative to the units (100 mass %) based on all the monomers in the copolymer (B).

11. An article having a porous substrate, wherein the porous substrate has a water/oil repellent-treated surface treated with the water/oil repellent composition as defined in claim 1 on at least one side, and has a moisture-permeable waterproofing film on one side.

12. The article according to claim 11 , wherein the porous substrate is cloth.

13. A method for producing a porous substrate having a water/oil repellent-treated surface and a moisture-permeable waterproofing film, which comprises treating at least one side of a porous substrate with the water/oil repellent composition as defined in claim 1 to form the water/oil repellent-treated surface and then applying a coating liquid containing a material of the moisture-permeable waterproofing film to one side of the porous substrate to form the moisture-permeable waterproofing film.

Assignees

• Asahi Glass Co Ltd

Inventors

• Shimada Minako
• Oomori Yuuichi

Classifications

• C09D127/08

  Homopolymers or copolymers of vinylidene chloride · CPC title

• D06M15/3562

  containing nitrogen · CPC title

• Y10T428/249953

  Composite having voids in a component [e.g., porous, cellular, etc.] · CPC title

• D06M15/273

  of unsaturated carboxylic esters having epoxy groups · CPC title

• D06M15/263

  of unsaturated carboxylic acids; Salts or esters thereof · CPC title