Adhesive for inorganic vapor-deposited film

• US 20020168515A1
• Filed: 03/14/2002
• Published: 11/14/2002
• Est. Priority Date: 03/16/2001
• Status: Active Grant

• Current Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Original Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Inventors: Murata, Masaki, Emoto, Katsuya, Nishida, Mitsuo, Yatsuka, Takeshi
• Granted Patent: US 6,743,512 B2
• Time in Patent Office: Days
• US Class Current: 428/343
• CPC Class Codes: C08G 18/289 containing silicon
• CPC Class Codes: C08G 18/4241 from dicarboxylic acids and dialcohols in combination with polycarboxylic acids and/or polyhydroxy compounds which are at least trifunctional
• CPC Class Codes: C09J 175/06 from polyesters
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane
• CPC Class Codes: Y10T 442/2738 Coating or impregnation intended to function as an adhesive to solid surfaces subsequently associated therewith

Abstract

There is provided an adhesive for inorganic vapor-deposited film which is characterized in containing a compounded product and/or a reacted product of polyurethane resin or polyester resin having a branch in a molecule with a silane coupling agent.

When the said adhesive is directly coated on an inorganic vapor-deposited film and adhered with a heat-sealing resin, a good adhesion is achieved. Also, when a packaging bag prepared by using the above is torn, a good tearing property is achieved.

Claims

1. An adhesive for inorganic vapor-deposited film which is characterized in containing a compounded product and/or a reacted product of polyurethane resin having a branch in a molecule with a silane coupling agent.

2. The adhesive for inorganic vapor-deposited film according to claim 1, wherein the branch concentration of the polyurethane resin is 30-300 equivalents/ton.

3. The adhesive for inorganic vapor-deposited film according to claim 1 or 2, wherein the polyurethane resin contains 15-95% by weight of polyester polyol component having a glass transition temperature of 30°

C. or higher when the total weight of the polyurethane resin is 100% by weight.

5. The adhesive for inorganic vapor-deposited film according to any of claims 1-4, wherein the silane coupling agent has an amino group.

6. The adhesive for inorganic vapor-deposited film according to any of claims 1-5, wherein a crosslinker of an isocyanate type is further compounded therewith.

4. An adhesive for inorganic vapor-deposited film which is characterized in containing a compounded product and/or a reacted product of polyester resin having a branch in a molecule with a silane coupling agent.