US 5,236,986 AGranted

Silicone polymers and water-dispersable, pasty silicone oil compositions comprising the same

AssigneeShin-Etsu Chemical Co., Ltd.

InventorKoji Sakuta

Life of this patent

Estimating the term…

Loading patent…

Abstract

A novel silicone polymer which is obtained by addition polymerization of at least one organohydrogenpolysiloxane of the type shown below R.sup.1.sub.a R.sup.2.sub.b H.sub.c SiO.sub.(4-a-b-c)/2 ( 1) R.sup.1.sub.j H.sub.k SiO.sub.(4-j-k)/2 ( 2) and a specific type of polyoxyalkylene and/or organopolysiloxane provided that at least one selected from the organohydrogenpolysiloxane of the general formula (1) and the polyoxyalkylene is present for the addition polymerization. The silicone polymer is capable of being swollen with silicone oils to give a uniform, pasty composition without use of any surface active agent. This composition is able to stably, uniformly disperse water therein. Thus, the silicone polymer has wide utility in the fields of cosmetics and medicines.

Claims26

Dependent claims

A crosslinked silicone polymer which is obtained by addition polymerization in the presence of a catalyst comprising a platinum or rhodium compound of (i) at least one organohydrogenpolysiloxane selected from the group consisting of those of the general formulas (1) and (2), and mixtures thereof,

R.sup.1.sub.a R.sup.2.sub.b H.sub.c SiO.sub.( 4-a-b-c)/2 (1)
R.sup.1.sub.j H.sub.k SiO.sub.( 4-j-k)/2 (2)
and (ii) at least one member selected from the group consisting of a polyoxyalkylene of the general formula (A)
C.sub.m H.sub.2m-1 O(C.sub.2 H.sub.4 O).sub.p (C.sub.3 H.sub.6 O).sub.q C.sub.m H.sub.2m-1 (A)
and an organopolysiloxane of the general formula (B)
R.sup.1.sub.d R.sup.3.sub.e SiO.sub.(4-d-e)/2 (B),
and mixtures thereof, provided that at least one of the organohydrogenpolysiloxane of the general formula (1) and the polyoxyalkylene of the general formula (A) is present for the addition polymerization, wherein R.sup.1 's may be the same or different in the respective formulas and represent an unsubstituted or substituted alkyl group having from 1 to 18 carbon atoms, an aryl group, or a monovalent halogenated hydrocarbon group, R.sup.2 represents an organic group of the general formula, C.sub.n H.sub.2n O(C.sub.2 H.sub.4 O).sub.f (C.sub.3 H.sub.6 O).sub.g R.sup.4, wherein R.sup.4 represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms or a group of the formula, R.sup.5 --(CO)--, in which R.sup.5 represents an alkyl group having from 1 to 5 carbon atoms, each of m and n is an integer of from 2 to 6, f is an integer of from 2 to 200, and g is an integer of from 0 to 200 provided that f+g is in the range of from 3 to 200, R.sup.3 represents a monovalent hydrocarbon group having a vinyl end group and having from 2 to 10 carbon atoms, a, b, c, d, e, j and k are, respectively, such that 1.0.ltoreq.a.ltoreq.2.5, 0.001.ltoreq.b.ltoreq.1, 0.001.ltoreq.c.ltoreq.1, 1.0.ltoreq.d.ltoreq.3.0, 0.001.ltoreq.e.ltoreq.1.5, 1.0.ltoreq.j.ltoreq.3.0, and 0.001.ltoreq.k.ltoreq.1.5, p is an integer of from 2 to 200, and q is an integer of from 0 to 200 provided that p+q is from 3 to 200.

4 more elements

A pasty silicone oil composition capable of dispersing water, which comprises a kneaded mixture of:

100 parts by weight of a crosslinked silicone polymer which is obtained by addition polymerization in the presence of a catalyst comprising a platinum or rhodium compound of (i) at least one organohydrogenpolysiloxane selected from the group consisting of those of the general formulas (1) and (2), and mixtures thereof,
R.sup.1.sub.a R.sup.2.sub.b H.sub.c SiO.sub.(4-a-b-c)/2 ( 1)
R.sup.1.sub.j H.sub.k SiO.sub.(4-j-k)/2 ( 2)
and (ii) at least one member selected from the group consisting of a polyoxyalkylene of the general formula (A)
C.sub.m H.sub.2m-1 O(C.sub.2 H.sub.4 O).sub.p (C.sub.3 H.sub.6 O).sub.q C.sub.m H.sub.2m-1 (A)
and an organopolysiloxane of the general formula (B)
R.sup.1.sub.d R.sup.3.sub.e SiO.sub.(4-d-e)/2 (B),
and mixtures thereof, provided that at least one of the organohydrogenpolysiloxane of the general formula (1) and the polyoxyalkylene of the general formula (A) is present for the addition polymerization, wherein R.sup.1 's may be the same or different in the respective formulas and represent an unsubstituted or substituted alkyl group having from 1 to 18 carbon atoms, an aryl group, or a monovalent halogenated hydrocarbon group, R.sup.2 represents an organic group of the general formula, C.sub.n H.sub.2n O(C.sub.2 H.sub.4 O).sub.f (C.sub.3 H.sub.6 O).sub.g R.sup.4, wherein R.sup.4 represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms or a group of the formula, R.sup.5 --(CO)--, in which R.sup.5 represents an alkyl group having from 1 to 5 carbon atoms, each of m and n is an integer of from 2 to 6, f is an integer of from 2 to 200, and g is an integer of from 0 to 200 provided that f+g is in the range of from 3 to 200, R.sup.3 represents a monovalent hydrocarbon group having a vinyl end group and having from 2 to 10 carbon atoms, a, b, c, d, e, j and k are, respectively, such that 1.0.ltoreq.a.ltoreq.2.5, 0.001.ltoreq.b.ltoreq.1, 0.001.ltoreq.c.ltoreq.1, 1.0.ltoreq.d.ltoreq.3.0, 0.001.ltoreq.e.ltoreq.1.5, 1.0.ltoreq.j.ltoreq.3.0, and 0.001.ltoreq.k.ltoreq.1.5, p is an integer of from 2 to 200, and q is an integer of from 0 to 200 provided that p+q is from 3 to 200;
and
from 10 to 1000 parts by weight of a silicone oil having a viscosity of not higher than 100 centistokes at 25.degree. C.,
said silicone polymer being swollen with said silicone oil.

8 more elements

Dependencies are inferred from the claim text.