US 5,633,312 A · Process for preparing polyorganosilane

Abstract

Disclosed is a process for preparing a polyorganosilane which comprises subjecting a disilane compound having at least two substituted or unsubstituted hydrocarbyloxy groups in one molecule to disproportionation reaction in the presence of a catalyst comprising a reaction product of an organic alkali metal compound represented by the formula (I): RM (I) wherein R represents a substituted or unsubstituted monovalent hydrocarbon group; and M represents an alkali metal, represented by the formula (III): MR.sup.3.sub.p M (III) wherein R.sup.3 represents a saturated or unsaturated chain or cyclic divalent hydrocarbon group or a divalent heterocyclic group, two or more R.sup.3 s may be the same or different and an ether oxygen atom may exist between two or more R.sup.3 s; p represents an integer of 1 or more; and M represents an alkali metal atom, and at least one of a disilane compound and a silane compound both of which have a substituted or unsubstituted hydrocarbyloxy group(s).

Claims14

Dependent claims

A process for preparing a polyorganosilane which comprises subjecting a disilane compound having at least two substituted or unsubstituted hydrocarbyloxy groups in one molecule to disproportionation reaction in the presence of a catalyst comprising a reaction product of an organic alkali metal compound represented by the formula (I):

RM (I)
wherein R represents a substituted or unsubstituted monovalent hydrocarbon group;
and M represents an alkali metal,
and at least one of a disilane compound or a silane compound both of which have one or more substituted or unsubstituted hydrocarbyloxy groups.

1 more element

A process for preparing a silicon-containing polymer having a branched or network structure, which comprises the steps of:

(1) reacting a disilane compound (A) having hydrocarbyloxy groups represented by the formula (II):
R.sup.1.sub.n Si.sub.2 (OR.sup.2).sub.6-n (II)
wherein R.sup.1 and R.sup.2 are the same or different and each independently represent a substituted or unsubstituted monovalent hydrocarbon group;
and n represents an integer of 0 to 3,
with an organic alkali metal compound (B) represented by the formula (III):
MR.sup.3.sub.p M (III)
wherein R.sup.3 represents a saturated or unsaturated chain divalent hydrocarbon group, a cyclic divalent hydrocarbon group or a divalent heterocyclic group, two or more R.sup.3 s may be the same or different and an ether oxygen atom may exist between two or more R.sup.3 s;
p represents an integer of 1 or more;
and M represents an alkali metal atom,
to synthesize a bis(disilyl) compound (C) having hydrocarbyloxy groups represented by the formula (IV):
(R.sup.2 O).sub.5-n R.sup.1.sub.n Si.sub.2 R.sup.3.sub.p Si.sub.2 R.sup.1.sub.n (OR.sup.2).sub.5-n (IV)
wherein R.sup.1, R.sup.2, R.sup.3, n and p have the same meanings as defined above,
and an alkali metal hydrocarbyloxide (D) represented by the formula (V):
MOR.sup.2 (V)
wherein R.sup.2 and M have the same meanings as defined above, from a part of the compound (A);
and
(2) subjecting the compound (C) in the resulting mixture and the remaining compound (A) to disproportionation reaction.

14 more elements

Dependencies are inferred from the claim text.

Process for preparing polyorganosilane

Life of this patent

Process for preparing polyorganosilane

Life of this patent

Abstract

Claims14