| 摘要 |
PURPOSE:To provide the title compsn. which is transparent and has excellent hardness, alkali resistance, etc., consisting of a specified polysiloxane having alkoxy groups, an alkoxyaluminum, a (co)polymer of a silane compd. having an epoxy group, an aminosilane compd. and an epoxy resin. CONSTITUTION:100pts.wt. polysiloxane (A) having an alkoxy group, represented by formula I (wherein R1 is a 1-8C alkyl; a is a number of 0<a<4 such that the ratio of the alkoxy groups attached to a Si atom accounts for, on the aver age, at least 10wt% of the compd.) is precondensed with 20-80pts.wt. alkoxyaluminum (B) of formula II (wherein R2 is a 1-8C alkyl) at room temp. to 100 deg.C. The resulting precondensate is blended with a precondensate of 10-40 pts.wt. (co)polymer (C) of a silane compd. having an epoxy group, represented by formula II or IV (wherein R3 is a 1-6C alkylene; R4 is a 1-4C alkyl) with 10-40pts.wt. aminosilane compd. (D) of formula V or VI (wherein R5 is OR3 or a 1-4C alkyl) and 10-100pts.wt. epoxy resin (E) of formula VI (wherein R6 is a 2-20C alkyl; n is 2-4).
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