ADHESIVE COMPOSITION FOR OPTICAL ELEMENT AND CEMENTED STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide an adhesive composition for an optical element that continuously suppresses the emission of fluorescence from a cement excited by an excitation light falling on cemented optical elements of a fluorescence microscope and is free from discoloration of the cement and peeling of the cemented surface and to provide a cemented structure. SOLUTION: The adhesive composition for the optical element is an energy ray-curable adhesive composition which has the compositional components as follows: the component (A) comprising 20-60 pts.wt. (meth)acrylic-modified oligomer having 1-4 (meth)acryloyl groups in one molecule wherein the main chain skeleton in the molecule comprises any of an olefin, an ether, an alicyclic ring, a heterocyclic ring or a hydrogenation product thereof; the component (B) comprising 20-60 pts.wt. the total of one or more kinds from each of a (meth)acrylate monomer having at least one polar group in the molecule and a (meth)acrylate monomer having a molecular structure with low polarity which has no polar group other than (meth)acryloyl groups in the side chain; the component (D) comprising 2.0 pts.wt. or less photopolymerization initiator having multiple bonds of the proportion of 20 % or less based on the total covalent bonds in one molecule; and the component (E) comprising 0.02-5.0 pts.wt. additives of a silane coupling agent and a thermal polymerization inhibitor. COPYRIGHT: (C)2004,JPO