Water/oil repellent composition, method for its production, and article
View Patent ↗To provide a water/oil repellent composition whereby it is possible to obtain an article which is excellent in each of water-repellency, oil-repellency, washing durability, heavy rain durability and texture, a method for producing said composition, and an article which is excellent in each of water-repellency, oil-repellency, washing durability, heavy rain durability and texture. The water/oil repellent composition comprises a copolymer having units based on a monomer (a), units based on a monomer (b) and units based on a monomer (c), and a liquid medium. Monomer (a): a compound represented by (Z—Y) n X (Z: a C 1-6 perfluoroalkyl group, etc.; Y: a divalent organic group, etc.; n: 1 or 2; X: a polymerizable unsaturated group). Monomer (b): a (meth)acrylate having no polyfluoroalkyl group and having an alkyl group with at least 20 carbon atoms. Monomer (c): a compound represented by CH 2 ═CR 1 C(O)O—[(C 2 H 4 O) a (C 4 H 8 O) b ]—H (R 1 : a hydrogen atom or a methyl group, and a/b=1 to 3).
1. A water/oil repellent composition comprising a copolymer comprising units based on the following monomer (a), units based on the following monomer (b) and units based on the following monomer (c), and a liquid medium:
monomer (a): a compound represented by the following formula (1):
(Z−Y) n X (1),
wherein Z is a C 4-6 perfluoroalkyl group, Y is a C 1-4 alkylene group, n is 1, and X is at least one group represented by the following formula (3-3) represented by
—OC(O)CR═CH 2 (3-3),
wherein R is a hydrogen atom, a methyl group or a chlorine atom,
monomer (b): a (meth)acrylate having no polyfluoroalkyl group and having an alkyl group with 20 to 24 carbon atoms,
monomer (c): a compound represented by the following formula (5),
CH 2 ═CR 1 C(O)O—[(C 2 H 4 O) a (C 4 H 8 O) b ]—H (5),
wherein R 1 is a hydrogen atom or a methyl group, a is 10, b is 5, and a bonding order of (C 2 H 4 O) units and (C 4 H 8 O) units is not limited,
wherein a content of C 2 H 4 O (EO) units is from 0.05 mass % to 9.93 mass %, relative to the total mass content of units based on all monomers in the copolymer, and
wherein a content of units based on the monomer (a) is from 5 to 40 mass %, a content of units based on the monomer (b) is from 40 to 94.9 mass %, and a content of units based on the monomer (c) is from 0.1 to 20 mass %, relative to the total mass content of units based on all monomers in the copolymer.
2. The water/oil repellent composition according to claim 1 , wherein the copolymer further comprises units based on the following monomer (d);
monomer (d): a halogenated olefin.
3. The water/oil repellent composition according to claim 2 , wherein the monomer (d) is vinyl chloride.
4. The water/oil repellent composition according to claim 2 , wherein a content of units based on the monomer (d) is from 3 mass % to 25 mass %, relative to the total mass content of units based on all monomers in the copolymer.
5. The water/oil repellent composition according to claim 1 , wherein the copolymer further comprises units based on the following monomer;
monomer (e): a monomer comprising a crosslinkable functional group.
6. The water/oil repellent composition according to claim 1 , wherein the liquid medium is an aqueous medium.
7. A method for producing a water/oil repellent composition, which comprises polymerizing monomer components comprising the following monomer (a), the following monomer (b) and the following monomer (c) in a liquid medium in the presence of a surfactant and a polymerization initiator, to form a copolymer:
monomer (a): a compound represented by the following formula (1):
(Z−Y) n X (1)
wherein Z is a C 4-6 perfluoroalkyl group, Y is a C 1-4 alkylene group, n is 1, and X is at least one group represented by the following formula (3-3)
—OC(O)CR═CH 2 (3-3),
wherein R is a hydrogen atom, a methyl group or a chlorine atom,
monomer (b): a (meth)acrylate having no polyfluoroalkyl group and having an alkyl group with 20 to 24 carbon atoms,
monomer (c): a compound represented by the following formula (5),
CH 2 ═CR 1 C(O)O−[(C 2 H 4 O) a (C 4 H 8 O) b ]—H (5),
wherein R 1 is a hydrogen atom or a methyl group, a is 10, b is 5, and a bonding order of (C 2 H 4 O) units and (C 4 H 8 O) units is not limited,
wherein a content of C 2 H 4 O (EO) units is from 0.05 mass % to 9.93 mass %, relative to the total mass content of units based on all monomers in the copolymer, and
wherein a content of units based on the monomer (a) is from 5 to 40 mass %, a content of units based on the monomer (b) is from 40 to 94.9 mass %, and a content of units based on the monomer (c) is from 0.1 to 20 mass %, relative to the total mass content of units based on all monomers in the copolymer.
8. The method for producing a water/oil repellent composition according to claim 7 , wherein the copolymer further comprises the following monomer (d):
monomer (d): a halogenated olefin.
9. The method for producing a water/oil repellent composition according to claim 7 , wherein the copolymer further comprises the following monomer (e):
monomer (e): a monomer having a crosslinkable functional group.
10. The method for producing a water/oil repellent composition according to claim 7 , wherein the liquid medium is an aqueous medium.
11. An article treated by using the water/oil repellent composition as defined in claim 1 .
12. The article according to claim 11 , wherein the article is a fiber product.