Method of producing gas-barrier laminated member

Patent metadata

Field	Value
Publication number	US-9266309-B2
Application number	US-99012209-A
Country	US
Kind code	B2
Filing date	Jun 26, 2009
Priority date	Jun 30, 2008
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A method of producing a gas-barrier laminated member having a gas-barrier layer formed by crosslinking the carboxyl groups of a polycarboxylic acid polymer with multivalent metal ions. The method comprises forming a layer (A) containing an alkaline compound of a multivalent metal on at least one surface of a plastic base material, applying a solution (b) obtained by dissolving a polycarboxylic acid polymer in a solvent containing at least water onto the layer (A) that contains the alkaline compound of the multivalent metal, and removing the solvent by a heat treatment so that a metal-ionically crosslinked structure is formed with the multivalent metal ions among the carboxyl groups in the solution (b). The gas-barrier laminated member has excellent adhesion to the base material, gas-barrier property, retort resistance and flexibility, and is efficiently produced by only being heated at a low temperature for a short period of time through a decreased number of simplified steps.

First claim

The invention claimed is:

1. A method of producing a gas-barrier laminated member comprising
forming, on at least one surface of a plastic base material, a layer (A) comprising a coating composition (a) that contains
an alkaline compound of a multivalent metal,
an isocyanate compound and
a resin component in an amount of 15 to 80% by weight with respect to the solid component, the resin component containing a polyester polyol having a resin skeleton with no monovalent metal element;

and thereafter,
applying onto the layer (A) a solution (b) obtained by dissolving a polycarboxylic acid polymer in a solvent containing at least water and containing a crosslinking agent capable of forming a crosslinked structure due to covalent bonds between carboxyl groups unreacted with the multivalent metal ion, and removing the solvent by a heat treatment so that a metal-ionically crosslinked structure due to the multivalent metal ions and a crosslinked structure due to the covalent bonds are formed among the carboxyl groups in the solution (b).

2. The method of producing a gas-barrier laminated member according to claim 1 , wherein a urethane bond is formed in said layer (A).

3. The method of producing a gas-barrier laminated member according to claim 1 , wherein said solution (b) contains a solvent having good affinity to the layer that contains the alkaline compound of the multivalent metal.

4. The method of producing a gas-barrier laminated member according to claim 1 , wherein said polycarboxylic acid polymer is a poly(meth)acrylic acid or a partly neutralized product thereof.

5. The method of producing a gas-barrier laminated member according to claim 1 , wherein the primary particle size of the alkaline compound of the multivalent metal is not larger than 0.5 μm.

6. The method of producing a gas-barrier laminated member according to claim 1 , wherein said alkaline compound of the multivalent metal comprises at least one of a carbonate or a hydroxide of calcium or magnesium.

7. The method of producing a gas-barrier laminated member according to claim 1 , wherein said cross-linked portion is forming at least two ester bonds or amido ester bonds.

8. The method of producing a gas-barrier laminated member according to claim 1 , wherein said cross-linked portion is forming at least one ester bond neighboring the cycloalkyl group.

9. The gas-barrier laminated member produced by the production method of claim 1 .

Assignees

• Obu Yusuke
• Kawai Kashiko
• Miyai Tomohiro
• Hidaka Takahiro
• Masuda Hideki
• Toyo Seikan Kaisha Ltd
• Kansai Paint Co Ltd

Inventors

• Obu Yusuke
• Kawai Kashiko
• Miyai Tomohiro
• Hidaka Takahiro
• Masuda Hideki

Classifications

• C08J7/0423

  with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder · CPC title

• B32B2250/02

  2 layers · CPC title

• B32B2250/24

  All layers being polymeric · CPC title

• B05D3/02

  by baking {(B05D3/04 takes precedence)} · CPC title

• B05D3/10

  by other chemical means · CPC title