Patent ID: 6760533
Filing Date: 2004-07-06
Classification: C08G,C08L,C09J,Y10T

Abstract:
An adhesive composition for bonding optical parts, comprising:(A) an epoxysilane represented by the following chemical formula (1) or a hydrolysis/polycondensation product thereof: RnSiX4-nâ€ƒâ€ƒ(1) â€ƒwherein R is an organic group having an epoxy bond or organic group having no epoxy bond, X is a hydrolyzable group or atom, and n is 1 or 2, with the proviso that when n is 1, R is an organic group having an epoxy bond and when n is 2, at least one of R's is an organic group having an epoxy bond; (B) a bisphenol epoxy resin having a viscosity of 2,000 to 5,000 mPaÂ·s; (C) a novolak epoxy resin; (D) a curing agent which is an amine; and (E) optionally at least one of water and an alcohol, wherein each of the amounts of the above components (A), (B), (C) and (D) is 3 to 60 wt %, 5 to 90 wt %, 5 to 35 wt % and 3 to 30 wt % based on the total weight of the components (A), (B) and (C), respectively and the amount of the above component (E) is 0 to 0.75 time the total number of mols of the hydrolyzable groups or atoms contained in the component (A).