Optical adhesive with diffusive properties

摘要

Optical adhesives that also diffuse visible light include a blend of an adhesive matrix which is an optical adhesive and a block copolymer. The adhesive may be a pressure sensitive adhesive and contains either acid or basic functionality. The block copolymer, which may be a diblock copolymer, contains a high Tg block and a functional block, the functionality of the functional block is complimentary to the functionality of the adhesive matrix to form an acid-base interaction. The adhesive may also contain a crosslinking agent.

主权项

1. An optically transmissive adhesive comprising:
an optically clear pressure sensitive adhesive matrix; and a block copolymer dispersed within the optically clear pressure sensitive adhesive adhesive matrix, wherein the adhesive comprises phase-separated microdomains that are larger than 700 nanometers, and wherein the phase-separated microdomains comprise blocks of the block copolymerm, and wherein the optically transmissive adhesive is free of added diffusive particles, and wherein the optically trasmissive adhesive when bonded to a substrate and aged for 1 week at 95° C. and 95% relative humidity does not exhibit delamination of bubbles in the bond line.