# US 2014/0370270 A1 · Aqueous coating agent and gas barrier film

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- Number: US 2014/0370270 A1
- Document ID: US20140370270A1
- Status: Published application
- Kind: A1
- Application number: 14/470,139
- Filed: 2014-08-27
- Published: 2014-12-18
- Earliest claimed: 2012-02-28
- Assignees: Toppan Printing Co., Ltd.
- Applicants: Toppan Printing Co., Ltd.
- Inventors: Junichi Kaminaga; Harumi Matsumoto; Sayaka Hoshi
- Web page: https://patentgrep.com/patent/US20140370270A1

## CPC

- C09D 175/04: Polyurethanes
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/08: of synthetic resin
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- B32B 27/40: comprising polyurethanes
- C08G 18/0823: {containing carboxylate salt groups or groups forming them}
- C08G 18/3206: {aliphatic}
- C08G 18/3271: {Hydroxyamines}
- C08G 18/3275: {containing two hydroxy groups}
- C08G 18/722: {Combination of two or more aliphatic and/or cycloaliphatic polyisocyanates}
- C08G 18/751: {containing only one cycloaliphatic ring}
- C08G 18/757: {containing at least two isocyanate or isothiocyanate groups linked to the cycloaliphatic ring by means of an aliphatic group}
- C08G 18/7614: {containing only one aromatic ring}
- C08G 18/8048: {with compounds of C08G18/34}
- C09D 5/024: {characterised by the additives}
- C09D 7/61: inorganic
- C09D 7/65: macromolecular (C09D7/41-C09D7/48 take precedence)
- C09D 7/70: {characterised by shape, e.g. fibres, flakes or microspheres}
- C09D 129/04: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
- B32B 2250/24: All layers being polymeric
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/26: Polymeric coating
- B32B 2307/7242: Non-permeable
- B32B 2439/70: Food packaging
- B32B 2439/80: Medical packaging
- Y10T 428/25: Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T 428/251: Mica
- Y10T 428/256: Heavy metal or aluminum or compound thereof
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An aqueous coating composition includes an aqueous polyurethane resin including a polyurethane resin having an acid group and a polyamine compound, a water-soluble polymer, and an inorganic layered mineral. The aqueous polyurethane resin is included at a solid content of 50-80 mass %, the water-soluble polymer is included at a solid content of 5-20 mass %, and the inorganic layered mineral is included at a solid content of 10-30 mass %, relative to a total solid content of the aqueous coating composition. The aqueous coating composition has a total solid concentration of not less than 5 mass % and a viscosity of not larger than 50 mPa-second at 23° C.

## Claims

### Claim 1

An aqueous coating composition, comprising:
an aqueous polyurethane resin comprising a polyurethane resin having an acid group and a polyamine compound;
a water-soluble polymer; and
an inorganic layered mineral,
wherein the aqueous polyurethane resin is included at a solid content of 50-80 mass %, the water-soluble polymer is included at a solid content of 5-20 mass %, and the inorganic layered mineral is included at a solid content of 10-30 mass %, relative to a total solid content of the aqueous coating composition, and the aqueous coating composition has a total solid concentration of not less than 5 mass % and a viscosity of not larger than 50 mPa-second at 23° C.

### Claim 2 (depends on 1)

The aqueous coating composition as defined in claim 1, wherein the water-soluble polymer comprises a polyvinyl alcohol resin having a degree of saponification of not less than 95% and a degree of polymerization of 30-2000.

### Claim 3 (depends on 1)

The aqueous coating composition as defined in claim 1, wherein the inorganic layered mineral comprises a water-swellable synthetic mica.

### Claim 4 (depends on 2)

The aqueous coating composition as defined in claim 2, wherein the inorganic layered mineral comprises a water-swellable synthetic mica.

### Claim 5 (depends on 1)

The aqueous coating composition as defined in claim 1, wherein the inorganic layered mineral comprises montmorillonite.

### Claim 6 (depends on 1)

The aqueous coating composition as defined in claim 1, wherein the polyurethane resin has an acid group on a side chain.

### Claim 7

A gas barrier film, comprising:
a base film comprising a plastic film; and
a film layer formed on the base film and comprising an aqueous polyurethane resin, a water-soluble polymer, and an inorganic layered mineral,
wherein the aqueous polyurethane resin comprises a polyurethane resin having an acid group and a polyamine compound, and the film layer includes 50-80 mass % of the aqueous polyurethane resin, 5-20 mass % of the water-soluble polymer, and 10-30 mass % of the inorganic layered mineral.

### Claim 8 (depends on 7)

The gas barrier film as defined in claim 7, wherein the water-soluble polymer comprises a polyvinyl alcohol resin having a degree of saponification of not less than 95% and a degree of polymerization of 30-2000.

### Claim 9 (depends on 7)

The gas barrier film as defined in claim 7, wherein the inorganic layered mineral comprises a water-swellable synthetic mica.

### Claim 10 (depends on 8)

The gas barrier film as defined in claim 8, wherein the inorganic layered mineral comprises a water-swellable synthetic mica.

### Claim 11 (depends on 7)

The gas barrier film as defined in claim 7, wherein the inorganic layered mineral comprises montmorillonite.

### Claim 12 (depends on 7)

The gas barrier film as defined in claim 7, wherein the polyurethane resin has an acid group on a side chain.

### Claim 13

A gas barrier laminate, comprising:
a base film comprising a plastic material;
a gas barrier layer formed on the base film;
a protective layer formed on the gas barrier layer;
an adhesive layer formed on the protective layer; and
a heat-sealable resin layer formed on the adhesive layer,
wherein the gas barrier layer is a film comprising an aqueous polyurethane resin, a water-soluble polymer, and an inorganic layered mineral,
the aqueous polyurethane resin comprises a polyurethane resin having an acid group and a polyamine compound,
the film formed by the gas barrier layer includes 50-80 mass % of the aqueous polyurethane resin, 5-20 mass % of the water-soluble polymer, and 10-30 mass % of the inorganic layered mineral.

### Claim 14 (depends on 13)

The gas barrier laminate as defined in claim 13, wherein the water-soluble polymer has a degree of saponification of not less than 95% and a degree of polymerization of 30-2000.

### Claim 15 (depends on 13)

The gas barrier laminate as defined in claim 13, wherein the inorganic layered mineral comprises a water-swellable synthetic mica.

### Claim 16 (depends on 14)

The gas barrier laminate as defined in claim 14, wherein the inorganic layered mineral comprises a water-swellable synthetic mica.

### Claim 17 (depends on 13)

The gas barrier laminate as defined in claim 13, wherein the protective layer comprises at least one of polyurethane, isocyanate, polybutadiene, polyethyleneimine, polyester and acrylic polyol and is formed by a wet coating method.

### Claim 18 (depends on 13)

The gas barrier laminate as defined in claim 13, wherein the inorganic layered mineral comprises montmorillonite.

### Claim 19 (depends on 13)

The gas barrier laminate as defined in claim 13, wherein the polyurethane resin has an acid group on a side chain.