Patent ID: 7986389
Filing Date: 2011-07-26
Classification: C08F,C08L,C09J,G02B

Abstract:
1. An adhesive composition for optical filter, comprising: a triblock copolymer wherein one polymer block (A1) comprising acrylic ester units, and two polymer blocks (B1) different in structure from the polymer block (A1) and comprising (meth)acrylic ester units, are bound to one another, or a triblock copolymer wherein two polymer blocks (A1) comprising acrylic ester units, and one polymer block (B1) different in structure from the polymer block (A1) and comprising (meth)acrylic ester units, are bound to one another, and a near-infrared light absorbing agent containing a diimmonium-based compound, wherein low-molecular-weight components in the triblock copolymer are in such an amount that both chromatic differences Δx and Δy of a film consisting of the adhesive composition, before and after left in an atmospheric environment at an ambient temperature of 60° C. under 95% relative humidity for 1000 hours, become 0.03 or less; wherein the triblock copolymer is represented by (B1)-(A1)-(B1).