Title:
ADHESIVE FOR OPTICAL FILM, COATING, AND OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2023/195297
Kind Code:
A1
Abstract:
Provided is an adhesive for an optical film with which it is possible increase adhesion to a substrate, even in a high-temperature, high-humidity environment. This adhesive for an optical film contains an aqueous dispersion comprising a polyurethane resin (X). The polyurethane resin (X) has at least a structural unit derived from a polyol (A), and a structural unit derived from a polyisocyanate (B). The polyol (A) comprises a polyester polyol (a) having a structure derived from terephthalic acid and a structure derived from neopentyl glycol, and dimethylol propionic acid (b). The polyol (A) comprises at least 85 mass% of the polyester polyol (a). The weight average molecular weight of the polyurethane resin (X) is 5,000-50,000. The polyurethane resin (X) contains at least 98 mass% of a difunctional constituent component. The polyurethane resin (X) has an acid value of 5-15 mg KOH/g.
Inventors:
KANEKO FUMIYA (JP)
FUJIWARA SAKIKO (JP)
HIROSE MASAHARU (JP)
FUJIWARA SAKIKO (JP)
HIROSE MASAHARU (JP)
Application Number:
PCT/JP2023/008694
Publication Date:
October 12, 2023
Filing Date:
March 08, 2023
Export Citation:
Assignee:
DKS CO LTD (JP)
International Classes:
C09J175/06; C08G18/00; C08G18/08; C08G18/34; C08G18/42; C08G18/66; C08G18/76; C09J7/35; G02B1/04
Domestic Patent References:
| WO2019004349A1 | 2019-01-03 |
Foreign References:
| JP2016540659A | 2016-12-28 |
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