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Aqueous coating agent and gas barrier film

A technology of water-based coating agent and gas-barrier laminate, which can be applied in the direction of coating, polyurea/polyurethane coating, type of packaging items, etc., can solve the problems of inability to confirm the content, peeling of laminated film, reduction of lamination strength, etc., Good adhesion or cohesion, improved quality retention, and excellent gas barrier properties

Inactive Publication Date: 2014-11-05
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although metal foil or metal vapor-deposited film is excellent in gas barrier properties, it has many problems as follows: it is opaque, so the content cannot be confirmed; due to poor stretchability, cracks occur at a few percent elongation, and the gas barrier properties decline; disposal after use as incombustibles, etc.
However, this gas-barrier resin laminated film is inferior in gas-barrier property compared with the above-mentioned resin film composed of polyvinylidene chloride, etc., and its range of application as a gas-barrier packaging material is limited.
[0011] Furthermore, the problem that the laminated body obtained by laminating the heat-sealing resin layer on the gas barrier film via an adhesive agent has good initial lamination strength, but when stored in a high-humidity atmosphere for a long time , the lamination strength decreases with the passage of time, and a part of the laminated film peels off (hereinafter referred to as "delamination")

Method used

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  • Aqueous coating agent and gas barrier film
  • Aqueous coating agent and gas barrier film
  • Aqueous coating agent and gas barrier film

Examples

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Embodiment

[0189] Hereinafter, the present invention will be described more concretely through examples and comparative examples, but the present invention is not limited to the following examples.

[0190] Hereinafter, the first embodiment and the second embodiment of the present invention will be more specifically described by way of examples and comparative examples.

manufacture example 1

[0192] 45.5 g of mXDI (m-xylylene diisocyanate), 93.9 g of hydrogenated XDI (1,3-bis(isocyanate methyl) cyclohexane), 24.8 g of ethylene glycol, 13.4 g of dimethylol propionic acid and 80.2 g of methyl ethyl ketone was mixed as a solvent, and reacted at 70° C. for 5 hours under a nitrogen atmosphere to prepare a carboxyl group-containing urethane prepolymer solution.

[0193] Next, this carboxyl group-containing urethane prepolymer solution was neutralized with 9.6 g of triethylamine at 40°C.

[0194] Disperse the carboxyl group-containing urethane prepolymer solution in 624.8 g of water with a homodisperser, perform chain extension reaction with 21.1 g of 2-[(2-aminoethyl)amino]ethanol, and distill off methyl ethyl ketone , thereby obtaining a water-dispersible polyurethane resin having an acid group having a solid content of 25% by mass, an average particle diameter of 90 nm, and an acid value of 26.9 mgKOH / g.

[0195] Next, using γ-(2-aminoethyl)aminopropylmethyldimethoxys...

manufacture example 2

[0197] Except having changed the polyamine compound of manufacture example 1 into the following compound, it carried out similarly to manufacture example 1, and obtained the water-based polyurethane resin of manufacture example 2.

[0198] Polyamine obtained by adding 97.1 g of hydrogenated XDI (1,3-bis(isocyanatemethyl)cyclohexane) dropwise, mixing 93.6 g of dimethylethanolamine, and reacting at 60°C for 2 hours under a nitrogen atmosphere compound.

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Abstract

This aqueous coating agent contains as primary constituent components: an aqueous polyurethane resin (A) containing a polyamine compound and a polyurethane resin having an acid group; an aqueous polymer (B); and an inorganic lamellar mineral (C). Of the entirety of the solid components the share contained of the aqueous polyurethane resin (A) is 50-80 mass%, of the aqueous polymer (B) is 5-20 mass%, and of the inorganic lamellar mineral (C) is 10-30 mass%. The concentration of the entirety of the solid components is at least 5 mass%, and the viscosity at 23°C is no greater than 50 mPa·s.

Description

technical field [0001] The invention relates to the water system used in the field of packaging of dry food, snacks, bread, delicacies and other foods that are resistant to moisture or oxygen, as well as disposable baby warmers, tablets, powder medicine or paste dressings, patches, etc. Coating agent and gas barrier film. More specifically, it relates to a water-based coating agent, a gas-barrier film, and a gas-barrier laminate used in the field of packaging requiring high gas-barrier properties and transparency for recognizable contents. [0002] this application claims priority based on Japanese Patent Application No. 2012-041251 for which it applied to Japan on February 28, 2012, and uses the content here. Background technique [0003] For packaging materials used in the packaging of food or pharmaceuticals, etc., in order to prevent deterioration or spoilage of the contents, maintain the functions or properties of food or pharmaceuticals, etc., block water vapor, oxyge...

Claims

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Application Information

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IPC IPC(8): C09D175/04B32B27/40C09D5/02C09D7/12C09D7/61C09D7/65
CPCC08G18/7614C09D5/02C08G18/3271B32B27/40C08G18/8048C08G18/751C08G18/0823C08G18/722C09D7/12C09D175/04C08G18/3275C08G18/3206C09D5/024B32B7/12B32B27/08B32B27/306B32B2250/24B32B2255/10B32B2255/26B32B2307/7242B32B2439/70B32B2439/80C08G18/757C09D7/70Y10T428/251Y10T428/25Y10T428/256C09D7/65C09D7/61C09D129/04
Inventor 神永纯一松本阳美星沙耶佳
Owner TOPPAN PRINTING CO LTD
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