Optical transparent adhesive sheet, method for producing optical transparent adhesive sheet, laminate and display device with touch panel
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United States of America Patent
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Oct 11, 2022
Grant Date -
Apr 26, 2018
app pub date -
Apr 28, 2016
filing date -
May 8, 2015
priority date (Note) -
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Abstract
The present invention provides an optically clear adhesive sheet having excellent environment resistance using a heat-curable polyurethane composition that has excellent flexibility and is capable of giving a thick film. The optically clear adhesive sheet of the present invention is formed of: a cured product of a heat-curable polyurethane composition, the heat-curable polyurethane composition containing a polyol component, a polyisocyanate component, and a tackifier, the polyol component having an olefin skeleton, the polyisocyanate component being a modified polyisocyanate that is obtained by reacting an acyclic aliphatic and/or alicyclic polyisocyanate containing an isocyanate group with an ether compound containing an ethylene oxide unit.
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