High performance photocurable optically clear adhesive
Assignee3M Innovative Properties Company
InventorsLan Hong Liu, Jianhui Xia, Thomas P. Klun, David A. Kowitz, Audrey A. Sherman
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Assignee3M Innovative Properties Company
InventorsLan Hong Liu, Jianhui Xia, Thomas P. Klun, David A. Kowitz, Audrey A. Sherman
Estimating the term…
The present invention is an optically clear, curable adhesive including a polyvinylbutyral, a polyurethane (meth)acrylate, a (meth)acrylate monomer, and a photoinitiator. The polyvinylbutyral has a dynamic viscosity of between about 9 and about 13 mPa·s and a polyvinyl alcohol weight percent of less than about 18%. The polyurethane (meth)acrylate includes the reaction product of a diol, at least one diisocyanate, and a hydroxyfunctional (meth)acrylate or an isocyanatofunctional (meth)acrylate. When the optically clear, curable adhesive is placed between two transparent substrates and made into a laminate, the laminate has a haze of less than about 6%, a transmission of greater than about 88%, and an optical clarity of greater than about 98% when cured. The optically clear, curable adhesive also has a peel adhesion of at least about 100 g/cm based on ASTM 3330 when cured.
An optically clear, curable adhesive comprising:
An optically clear laminate comprising:
Dependencies are inferred from the claim text.