Patent ID: 8791221

Claim:
A metallosiloxane compound as a metallosiloxane compound (A) prepared by reacting a silane compound (S1) represented by Formula (1), a silane compound (S2) represented by Formula (2), and a boron compound (M), or reacting the silane compound (S1), the silane compound (S2), the boron compound (M), and H 2 O in a molar ratio of [the silane compound (S1)]:[the silane compound (S2)]:[the boron compound (M)]:[H 2 O] of n:m:k:a, where n, m, k, and a satisfy all conditions (i), (ii), and (iii), wherein the metallosiloxane compound has at least one Si—H bond or C 2-10 alkenyl group per molecule, Formula (1) expressed as follows: wherein R 1 and R 2 are the same as or different from each other and each represent a hydrogen atom, a C 1-10 alkyl group, a C 2-10 alkenyl group, a C 6-14 aryl group, or a C 7-15 aralkyl group; and X 1 and X 2 are the same as or different from each other and each represent a C 1-10 alkoxy group, a halogen atom, or a hydroxyl group, Formula (2) expressed as follows: wherein R 3 , R 4 , and R 5 are the same as or different from one another and each represent a hydrogen atom, a C 1-10 alkyl group, a C 2-10 alkenyl group, a C 6-14 aryl group, or a C 7-15 aralkyl group; and X 3 represents a C 1-10 alkoxy group, a halogen atom, or a hydroxyl group, and the conditions (i), (ii), (iii) expressed as follows: (i) n>0, m>0, k>0, a≧0; (ii) m/n≧0.5; and (iii) (n+m)/k≧1.8.