| 摘要 |
PROBLEM TO BE SOLVED: To provide curing compositions giving cured products useful for such as optical devices, parts materials, electronic devices and parts insulating materials, with excellent optical transparency in a short wavelength range. SOLUTION: Curing compositions are composed of (A) an organic Si compound (a) shown by the formula (1) [wherein A represents a group shown by the formula (2) (wherein R' represents a univalent hydrocarbon group or an alkoxy group, n represents an integer of 0-100) or a bivalent group shown by formula (3), R represents a univalent hydrocarbon group or an alkoxy group], (b) an addition reaction product with a polycyclic hydrocarbon having at least 2 additional reactive C=C bonds in one molecule and an addition reaction product having at least 2 additional reactive C=C bonds in one molecule, (B) represents a compound having 3 or more hydrogen atoms bonded with a silicon atom and (C) a hydrosilylating reaction catalyst. COPYRIGHT: (C)2005,JPO&NCIPI
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