Adhesive, laminated film using thereof and polyol composition for adhesive

Patent metadata

Field	Value
Publication number	US-11180685-B2
Application number	US-201716337593-A
Country	US
Kind code	B2
Filing date	Sep 29, 2017
Priority date	Sep 29, 2016
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

Provided are a solvent-free two-component type adhesive capable of guaranteeing a practical packaging property, with an excellent curing property and significantly shortening aging time, a laminated film using the same, and a polyol composition for an adhesive. An adhesive, characterized in comprising a polyisocyanate composition (X) containing a polyisocyanate (A), and a polyol composition (Y) containing a polyol (C) and a tertiary amine compound (B) having multiple hydroxyl groups, as necessary components.

First claim

The invention claimed is:

1. An adhesive comprising:
a polyisocyanate composition (X), having a viscosity at the time of coating of 1000 mPas or less, containing:
a polyisocyanate (A), and
a polyol composition (Y), having a viscosity at the time of coating of 1000 mPas or less, containing:
a polyol (C) selected from the group consisting of a polyester polyol, a polyester urethane polyol, a polyether urethane polyol, a polyether polyol and a castor oil-based polyol, and

a tertiary amine compound (B) having multiple hydroxyl groups.

2. The adhesive according to claim 1 , wherein an amine value of the adhesive ranges from 0.5 to 40 mgKOH/g.

3. The adhesive according to claim 1 , wherein the polyol composition (Y) has a mass ratio of from 10 to 150 when the polyisocyanate composition (X) is set as 100.

4. A laminated film, which is characterized in that, a cured adhesive is provided between a first base film and a second base film, and the adhesive is the one according to claim 1 .

5. A polyol composition for an adhesive, having a viscosity at the time of coating of 1000 mPas or less, comprising: a polyol (C) selected from the group consisting of a polyester polyol, a polyester urethane polyol, a polyether urethane polyol, a polyether polyol and a castor oil-based polyol, and a tertiary amine compound (B) having multiple hydroxyl groups.

6. A method for producing a film for flexible packaging comprising:
coating a polyisocyanate composition (X), having a viscosity at the time of coating of 1000 mPas or less, containing a polyisocyanate (A) on one base material;
coating a polyol composition (Y), having a viscosity at the time of coating of 1000 mPas or less, containing a polyol (C) selected from the group consisting of a polyester polyol, a polyester urethane polyol, a polyether urethane polyol, a polyether polyol and a castor oil-based polyol, and a tertiary amine compound (B) having multiple hydroxyl groups on another base material; and
laminating the one base material and another base material together.

7. The adhesive according to claim 1 , further comprising an alicyclic amide compound.

8. The adhesive according to claim 7 , wherein the mixing amount of the alicyclic amide compound is 0.1 to 5 parts by mass per 100 parts by mass of the polyol (C).

9. The method for producing a laminate for flexible packaging according to claim 6 , wherein the polyol composition (Y) does not contain the polyisocyanate (A).

10. The method for producing a laminate for flexible packaging according to claim 6 , wherein the coating amount of the polyisocyanate composition (X) is 0.5 to 3.0 g/m 2 and the coating amount of the polyol composition (Y) is 0.5 to 3.0 g/m 2 .

Assignees

• Dainippon Ink & Chemicals

Inventors

• Nakamura Makoto
• Tomita Daiki
• Takahashi Shigekazu
• Liu Bingbing
• Zhao Feng
• Liu Zhiqiang

Classifications

• C08G18/5021

  having nitrogen · CPC title

• B32B2553/00

  Packaging equipment or accessories not otherwise provided for · CPC title

• B32B2307/542

  Shear strength · CPC title

• B32B2250/24

  All layers being polymeric · CPC title

• C08G18/7671

  containing only one alkylene bisphenyl group · CPC title