Polyisocyanate mixture, polyol mixture, adhesive, and laminated film

Patent metadata

Field	Value
Publication number	US-2016208146-A1
Application number	US-201415024915-A
Country	US
Kind code	A1
Filing date	Sep 26, 2014
Priority date	Sep 30, 2013
Publication date	Jul 21, 2016
Grant date	—

Abstract

Provided are an adhesive, a polyisocyanate component and a polyol component which are to be used in the adhesive, and a laminated film. The adhesive has a small elution amount of a low-molecular chemical substance when being used as a packaging material. The laminated film has a small amount of the low-molecular chemical substance eluted into the contents during packaging. The adhesive contains polyisocyanate (A), an alicyclic amide compound (B), and polyol (C) as essential components. When the adhesive is used, a polyisocyanate mixture obtained by mixing the polyisocyanate (A) and the alicyclic amide compound (B) in advance or a polyol mixture obtained by mixing the polyol (C) and the alicyclic amide compound (B) in advance is used as one component of a two-liquid adhesive.

First claim

1 - 16 . (canceled)

17 . A polyol mixture, which is to be used for a polyisocyanate/polyol curing adhesive for lamination, comprising:
polyol (C) and ε-caprolactam (B) as essential components.

18 . The polyol mixture according to claim 17 comprising:
ε-caprolactam (B) in an amount of 0.1 to 10 parts by mass per 100 parts by mass of the polyol (C).

19 . An adhesive comprising: a polyol mixture (Y), which is prepared by mixing polyol (C) and ε-caprolactam (B) in advance, and polyisocyanate (A) as essential components.

20 . The adhesive according to claim 19 wherein the polyol mixture (Y) is the polyol mixture which is to be used for a polyisocyanate/polyol curing adhesive for lamination, comprising polyol (C) and ε-caprolactam (B) as essential components.

21 . The adhesive according to claim 19 wherein, with respect to a ratio of the polyol mixture (Y) and the polyisocyanate (A) to be used, an equivalent ratio [isocyanate group/hydroxyl group] of a hydroxyl group in the polyol mixture (Y) and an isocyanate group in the polyol resin (A) is from 1.0 to 5.0.

22 . A laminated film prepared by coating a first plastic film with the adhesive according to claim 19 to form an adhesive layer, subsequently laminating a second plastic film on the coated surface, and curing the adhesive layer.

23 . The adhesive according to claim 19 wherein the polyol mixture (Y) is the polyol mixture which is to be used for a polyisocyanate/polyol curing adhesive for lamination, comprising polyol (C) and ε-caprolactam (B) as essential components, with ε-caprolactam (B) in an amount of 0.1 to 10 parts by mass per 100 parts by mass of the polyol (C).

Assignees

• Dainippon Ink & Chemicals

Inventors

• Arai Masamitsu
• Shimamura Kenichi
• Suzuki Shinya
• Ohara Shinichi
• Tamaoka Takashi

Classifications

• C08K5/3412

  having one nitrogen atom in the ring · CPC title

• C08G65/33348

  containing isocyanate group · CPC title

• C08G18/10

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title

• C08G18/4804

  Two or more polyethers of different physical or chemical nature · CPC title

• C09J11/06 Primary

  organic · CPC title