Disclosed is a water-based coating composition having as a base resin, a core/shell type emulsion resin comprising an acrylic resin as the core portion and a polyurethane resin as the shell portion, wherein the mass ratio of the core portion and the shell portion in the aforementioned core/shell type emulsion resin is between 20/80 and 80/20, the aforementioned acrylic resin has a hydroxyl group value of 40 to 140 mg KOH/g and an acid value of 0 to 10 mg KOH/g, the aforementioned polyurethane resin has a hydroxyl group value of 20 to 80 mg KOH/g and an acid value of 10 to 60 mg KOH/g, and the total mass ratio of constituent units derived from dibasic acids and/or dihydric alcohols having 10 to 60 carbon atoms in the aforementioned polyurethane resin is 10 to 50 mass % relative to the solid resin content of the aforementioned polyurethane resin.

Disclosed is a water-based coating composition having as a base resin, a core/shell type emulsion resin comprising an acrylic resin as the core portion and a polyurethane resin as the shell portion, wherein the mass ratio of the core portion and the shell portion in the aforementioned core/shell type emulsion resin is between 20/80 and 80/20, the aforementioned acrylic resin has a hydroxyl group value of 40 to 140 mg KOH/g and an acid value of 0 to 10 mg KOH/g, the aforementioned polyurethane resin has a hydroxyl group value of 20 to 80 mg KOH/g and an acid value of 10 to 60 mg KOH/g, and the total mass ratio of constituent units derived from dibasic acids and/or dihydric alcohols having 10 to 60 carbon atoms in the aforementioned polyurethane resin is 10 to 50 mass % relative to the solid resin content of the aforementioned polyurethane resin.

Copolymers and latex paint compositions using such copolymers that are heat-age stable and provide good adhesion, block resistance, and hiding all while using lower amounts of titanium dioxide are described herein. In one aspect, the heat-age stable compositions include an acrylic, styrene acrylic, vinyl acrylic copolymer or blends thereof including, as additional polymerizable units, at least one polymerizable phosphate surfactant and at least one linear or branched hydrophobic monomer that are both polymerized into the acrylic, styrene acrylic, vinyl acrylic copolymer backbone.

The invention provides a composition for forming a coating film which comprises (1) a polymer of a monomer mixture containing monomers represented by the following formulae (A) to (D):

##STR00001##

(wherein T.sup.a, T.sup.b, T.sup.c, T.sup.d, U.sup.a1, U.sup.a2, U.sup.b1, U.sup.b2, U.sup.b3, Q.sup.a, Q.sup.b, Q.sup.c, R.sup.a, R.sup.b, R.sup.c, R.sup.d, An.sup., m and n are as defined herein), where a ratio of a total of the anionic monomer represented by the above-mentioned formula (A) and the cationic monomer represented by the above-mentioned formula (B) based on total monomers contained in the monomer mixture is 40 mol % or more, and (2) a polycarbodiimide containing a structure represented by the following formula (E):

NCN(E)

a coating film which is a cured product thereof and a process for producing the same, and a cured product and a process for producing the same.

An acrylic rubber containing acrylate monomer units, methacrylate monomer units, and crosslinkable monomer units, wherein a glass transition temperature is 20 C. or less, a change ratio in volume after a crosslinked rubber of the acrylic rubber is immersed in IRM903 oil at 1502 C. for 72 hours is 0 to 100%, and a change ratio in weight after a crosslinked rubber of the acrylic rubber is immersed in hot water at 1502 C. for 96 hours and dried is 5.0 to 0%.

Copolymers and latex paint compositions using such copolymers that are heat-age stable and provide good adhesion, block resistance, and hiding all while using lower amounts of pigment are described herein. In one aspect, the heat-age stable compositions include an acrylic, styrene acrylic, vinyl acrylic copolymer or blends thereof including, as additional polymerizable units, at least one polymerizable phosphate surfactant and at least one linear or branched hydrophobic monomer that are both polymerized into the acrylic, styrene acrylic, vinyl acrylic copolymer backbone.

The purpose of the present invention is to provide: an aqueous binder having high adhesiveness, that in particular does not exhibit oxidative degradation in an electrode environment, and having little environmental load; and an electrode and a battery that use same. Disclosed is a battery electrode binder containing: (A) a constituent unit derived from a monomer having a hydroxyl group; and (B) a constituent unit derived from a polyfunctional (meth)acrylate having no more than 5 functions. An electrode is prepared using this binder and is used in a battery such as a lithium-ion secondary battery.

The purpose of the present invention is to provide: an aqueous binder having high adhesiveness, that in particular does not exhibit oxidative degradation in an electrode environment, and having little environmental load; and an electrode and a battery that use same. Disclosed is a battery electrode binder containing: (A) a constituent unit derived from a monomer having a hydroxyl group; and (B) a constituent unit derived from a polyfunctional (meth)acrylate having no more than 5 functions. An electrode is prepared using this binder and is used in a battery such as a lithium-ion secondary battery.

Provided is a binder for battery electrodes which includes a polymer including: structural units (1) derived from a (meth)acrylate monomer (A) having a hydroxyl group; structural units (2) derived from a polyfunctional (meth)acrylate monomer (B); and structural units (3) derived from a reactive surfactant (C). This binder is used to prepare electrodes, and produce batteries such as lithium ion secondary batteries. Provided are: an aqueous binder which has a low environmental impact, exhibits excellent binding properties, and, notably, does not cause oxidation degradation under an electrode environment; and an electrode and a battery which use said binder.

Provided is a binder for battery electrodes which includes a polymer including: structural units (1) derived from a (meth)acrylate monomer (A) having a hydroxyl group; structural units (2) derived from a polyfunctional (meth)acrylate monomer (B); and structural units (3) derived from a reactive surfactant (C). This binder is used to prepare electrodes, and produce batteries such as lithium ion secondary batteries. Provided are: an aqueous binder which has a low environmental impact, exhibits excellent binding properties, and, notably, does not cause oxidation degradation under an electrode environment; and an electrode and a battery which use said binder.