Composition for aqueous coating liquid
To provide an aqueous composition for aqueous coating that contains a polymerized substance of a N-vinyl carboxylic acid amide and that dries efficiently when used to produce a coating substance. A composition for aqueous coating liquid, comprising at least a copolymer of a N-vinyl carboxylic acid amide monomer and a monomer of a salt of an unsaturated carboxylic acid, and water, in which the molar ratio between the N-vinyl carboxylic acid amide monomer and the monomer of a salt of an unsaturated carboxylic acid is 7.0:93.0 to 93.0:7.0, and the weight-average molecular weight of the copolymer is 15,000 to 2,500,000.
1 . A composition for aqueous coating liquid, comprising at least:
a copolymer of a N-vinyl carboxylic acid amide monomer and a monomer of a salt of an unsaturated carboxylic acid; and
water,
wherein a molar ratio between the N-vinyl carboxylic acid amide monomer and the monomer of a salt of an unsaturated carboxylic acid is 8.0:92.0 to 60.0:40.0, and a weight-average molecular weight of the copolymer is 100,000 to 1,500,000, and
wherein Mw/Mn of the copolymer is not less than 2.2.
2 . The composition for aqueous coating liquid according to claim 1 , further comprising inorganic filler.
3 . The composition for aqueous coating liquid according to claim 1 , wherein
the N-vinyl carboxylic acid amide monomer is N-vinylacetamide.
4 . The composition for aqueous coating liquid according to claim 1 , wherein
a viscosity of an aqueous solution with a solid content concentration of the copolymer of 5 mass % is 1,500 to 30,000 mPa·s, and a solid content concentration is 1 to 15 mass %.
5 . The composition for aqueous coating liquid according to claim 1 , wherein
the monomer of a salt of an unsaturated carboxylic acid is a salt of (meth)acrylic acid.
6 . The composition for aqueous coating liquid according to claim 1 , wherein
the composition for aqueous coating liquid contains the copolymer at 1.0 to 20.0 parts by mass relative to 100 parts by mass of the water.
7 . The composition for aqueous coating liquid according to claim 2 , wherein
the inorganic filler is at least one of alumina and boehmite.
8 . The composition for aqueous coating liquid according to claim 1 , wherein
the composition for aqueous coating liquid further comprises a N-vinyl carboxylic acid amide homopolymer in addition to the copolymer of a N-vinyl carboxylic acid amide monomer and a monomer of a salt of an unsaturated carboxylic acid.
9 . A method for manufacturing a water-soluble high polymer coating substance, the method comprising:
applying the composition for aqueous coating liquid according to claim 1 to a surface of a base material; and
performing drying.
10 . A method for manufacturing the composition for aqueous coating liquid according to claim 1 , the method comprising:
performing radical polymerization by using a non-halogen azo-compound-based polymerization initiator.
11 . A method for manufacturing the composition for aqueous coating liquid according to claim 1 , the method comprising:
performing polymerization by stirring polymerization.
12 . The composition for aqueous coating liquid according to claim 2 , wherein
the N-vinyl carboxylic acid amide monomer is N-vinylacetamide.
13 . The composition for aqueous coating liquid according to claim 2 , wherein
a viscosity of an aqueous solution with a solid content concentration of the copolymer of 5 mass % is 1,500 to 30,000 mPa·s, and a solid content concentration is 1 to 15 mass %.
14 . The composition for aqueous coating liquid according to claim 2 , wherein
the monomer of a salt of an unsaturated carboxylic acid is a salt of (meth)acrylic acid.
15 . The composition for aqueous coating liquid according to claim 2 , wherein
the composition for aqueous coating liquid contains the copolymer at 1.0 to 20.0 parts by mass relative to 100 parts by mass of the water.
16 . The composition for aqueous coating liquid according to claim 2 , wherein
the composition for aqueous coating liquid further comprises a N-vinyl carboxylic acid amide homopolymer in addition to the copolymer of a N-vinyl carboxylic acid amide monomer and a monomer of a salt of an unsaturated carboxylic acid.
17 . A method for manufacturing a water-soluble high polymer coating substance, the method comprising:
applying the composition for aqueous coating liquid according to claim 2 to a surface of a base material; and
performing drying.
18 . A method for manufacturing the composition for aqueous coating liquid according to claim 2 , the method comprising:
performing radical polymerization by using a non-halogen azo-compound-based polymerization initiator.
19 . A method for manufacturing the composition for aqueous coating liquid according to claim 2 , the method comprising:
performing polymerization by stirring polymerization.