Optical adhesive
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United States of America Patent
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Jul 25, 2023
Grant Date -
Jan 24, 2019
app pub date -
Jan 9, 2017
filing date -
Jan 15, 2016
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Abstract
An optical adhesive including a viscoelastic or elastomeric adhesive layer and a cured polymer layer immediately adjacent the viscoelastic or elastomeric adhesive layer is described. The viscoelastic or elastomeric adhesive layer a refractive index less than 1.570 and the cured polymer layer has a refractive index of at least 1.570. An interface between the viscoelastic or elastomeric adhesive layer and the cured polymer layer is structured. The cured polymer layer has a storage modulus of at least 2000 MPa at 20° C. and a glass transition temperature of no more than 65° C.
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