Polyisocyanate composition, cured film, coating film, pressure-sensitive adhesive composition, and pressure-sensitive adhesive sheet

JP7791687B2Active Publication Date: 2025-12-24ASAHI KASEI KOGYO KABUSHIKI KAISHA
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Patent Information

Application Number
JP2021173926
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-11-19
Filing Date
2021-10-25
Publication Date
2025-12-24
Estimated Expiration
2041-10-25

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Abstract

To provide a polyisocyanate composition excellent in flexibility of a cured film obtained by curing a polyisocyanate composition alone and capable of obtaining an adhesive sheet excellent in adhesiveness, cohesive force, curability and transparency.SOLUTION: A polyisocyanate composition is induced from at least one kind of diisocyanate selected from a group consisting of aliphatic diisocyanate and alicyclic diisocyanate, a bifunctional polyol (A) having a number average molecular weight of 1500 or more and a trifunctional or higher polyol (B) having a number average molecular weight of 500 or more. The molar ratio of the isocyanate groups of the diisocyanates to the hydroxyl groups of the polyols (A) and (B) is 2 or more and 30 or less, and the weight average molecular weight of the polyisocyanate composition is 1400 or more.SELECTED DRAWING: None
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