SOLVENTLESS POLYURETHANE ADHESIVE AGENT FOR LAMINATE

WIPO Patent Application WO/2023/181916

A1

The present invention provides an adhesive agent that is for a laminate and that is solventless and exhibits a high laminate strength with respect to a film in which a surface layer can be easily removed. Provided is a solventless polyurethane adhesive agent that is for a laminate and that comprises: a first liquid of a polyester polyol component (A) which is obtained by dehydration condensation of an alcohol compound having a valence of one or higher and a carboxylic acid compound having a valence of one or higher; and a second liquid containing a polyisocyanate component (B) which has, as structural units, an aliphatic isocyanate component (b-1) and a polyester component (b-2). In an adhesive agent cured film, the product of the elastic modulus and yield strength point thereof is 0.08-0.18 MPa2 . Component (A) and component (b-2) in combination constitute not less than 60 wt% of the adhesive agent cured film. Component (A) and/or component (b-2) has a triethylene glycol structural unit. The triethylene glycol component constitutes 0.2-25 mass% of the adhesive agent cured film.

MATSUZAWA SOICHIRO (JP)
NIHEI EITA (JP)

PCT/JP2023/008587

September 28, 2023

March 07, 2023

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ROCK PAINT CO LTD (JP)

C09J175/06

WO2022190873A1

2022-09-15

JP2010059362A	2010-03-18
JP2018027658A	2018-02-22
JP2010031105A	2010-02-12
JP2012067319A	2012-04-05
JP2020168837A	2020-10-15
JPS6055072A	1985-03-29
JP7231131B1	2023-03-01

SAMEJIMA Takenobu (JP)

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