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AssigneeFina Technology, Inc.
InventorsTaejun Yoo, Herbert Chao, Steven K. Henning
Estimating the term…
A low viscosity polymer having a linear or branched backbone derived from farnesene monomers and at least one terminal-end functionalized with a hydroxyl group. This polymer may be further hydrogenated to reduce unsaturation and acrylated, such that it may be incorporated into a LOCA composition. The LOCA composition may be used in a laminated screen assembly, such as a touch screen, for electronic devices by adhering the LOCA composition between an optically transparent layer, such as a cover glass, and a display. The cured LOCA composition has a refractive index similar to the optically transparent layer. A method of making the low viscosity polymer for the LOCA composition includes anionically polymerizing farnesene monomers, quenching a living end of the polymer to provide the hydroxyl-terminated polymer; hydrogenating the hydroxyl-terminated polymer; and reacting the at least partially saturated hydroxyl-terminated polymer with at least one reagent to provide an acrylate terminated hydrogenated polymer.
A liquid optically clear adhesive composition comprising a polymer derived from monomers comprising farnesene, the polymer being obtained from a diol wherein hydroxyl groups of the diol have been further reacted to provide terminal ends functionalized with (meth)acrylate groups and wherein the polymer has a degree of unsaturation of less than or equal to 50%, wherein the adhesive composition has a refractive index greater than 1.45 after curing.
A method of preparing a liquid optically clear adhesive composition comprising:
A polymer comprising a linear or branched backbone derived from a monomer feed comprising farnesene and a comonomer, the farnesene content of the monomer feed being greater than or equal to 25%, by mole, the polymer having terminal ends functionalized with (meth)acrylate groups and a viscosity at 60° C. of equal to or less than 25,000 cP before curing.
Dependencies are inferred from the claim text.