Polyurethane resin, adhesive, film and paint containing said resin for lamination

A polyurethane resin and coating technology, which is applied in the fields of gas barrier films, adhesives for gas barrier lamination, gas barrier films and coatings, and can solve the problems of undiscovered materials and insufficient gas barrier properties

Inactive Publication Date: 2004-02-11
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this urethane resin is thermoplastic, and since the gas barrier property at high humidity and the gas barrier property after retort treatment at high humidity are not yet high enough, a material to replace PVDC has not yet been found in terms of performance and cost. , which is the current status

Method used

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  • Polyurethane resin, adhesive, film and paint containing said resin for lamination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0236] 100 parts by weight of the active hydrogen-containing compound A and 342 parts by weight of the organic polyisocyanate compound A were mixed, and a solution of acetone / ethyl acetate=1 / 0.3 was used to adjust the solid content to 35% by weight. 0.02 parts by weight of an acrylic wetting agent (manufactured by BYK Chemie GmbH: BYK381) was added thereto, and the mixture was sufficiently stirred to prepare a coating liquid.

[0237] Using bar coater No. 6, the coating solution was applied to a 20μm thick stretched polypropylene film (coating amount: 3g / m 2 (Solid matter)) After drying at 85°C for 10 seconds, a 30 μm-thick polypropylene film was bonded with a nip roll and cured at 40°C for 3 days to obtain a laminated film. The content of the skeleton structure (1) in the adhesive layer was 55.3% by weight.

[0238] The gas barrier properties of the obtained laminate film, the gas barrier properties after Gelb0 treatment, the water vapor permeability, and the adhesiveness immedia...

Embodiment 2

[0242] Except having used 401 parts by weight of the organic polyisocyanate compound B instead of the organic polyisocyanate compound A, it was produced in the same manner as in Example 1. The content of the skeleton structure (1) in the adhesive layer was 48.0% by weight. The evaluation results are shown in Table 1 and Table 2.

Embodiment 3

[0244] Except that 347 parts by weight of the organic polyisocyanate compound C was used instead of the organic polyisocyanate compound A, it was produced in the same manner as in Example 1. The content of the skeleton structure (1) in the adhesive layer was 53.6% by weight. The evaluation results are shown in Table 1 and Table 2.

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Abstract

The polyurethane resin produced by reacting a component composed mainly of an active hydrogen-containing compound with a component composed mainly of an organic polyisocyanate compound which contains a backbone structure represented by the formula: in an amount of 20% by weight or higher, exhibits a high gas-barrier property and a high adhesion property. Accordingly, the present invention provides: (A) a two-part liquid curable polyurethane resin composition having an excellent adhesion property to various polymers, papers, metals, etc., especially after boiling and retort treatments, and an adhesive for gas-barrier laminate containing such a composition; (B) a heat-curing gas-barrier polyurethane resin useful as a packaging material for foodstuffs or drugs for the purpose of preserving contents thereof by preventing various gases from penetrating therethrough, which is capable of maintaining its high gas-barrier property; and (C) a paint having excellent properties such as rust-proofing property, corrosion resistance and aesthetic decorating property that are inherent to polyurethane resin, and being applicable to packaging materials for foodstuffs or drugs that are required to show a high gas-barrier property by shielding various gases.

Description

Invention field [0001] The present invention relates to a gas-barrier polyurethane resin, an adhesive for laminating, a gas-barrier film, and a paint containing the resin. [0002] In detail, the present invention relates to the following: (A) At the same time, it has high gas barrier properties and high bonding properties, especially for various polymers, paper, metals, etc., which have excellent bonding properties after cooking. Two-component curable polyurethane resin composition and a gas barrier laminating adhesive containing the composition; (B) can be used as a barrier to preserve the contents by shielding various gases such as oxygen, water vapor, and aroma components The intended packaging materials for foods and pharmaceuticals, especially thermosetting gas-barrier polyurethane resins that maintain high gas barrier properties after being subjected to retort treatment under high humidity, and have excellent adhesion to the substrate film, and containing the resin The gas ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08G18/75C08G18/76C08G18/79
CPCC08G18/755C08G18/7642C08G18/752C08G18/7621C08G18/3206C08G18/10C08G18/792C08G18/329C08G18/8009
Inventor 野村岳志小山刚司
Owner MITSUBISHI GAS CHEM CO INC
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