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EP0501791A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Water-dispersable, pasty silicone oil compositions

Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1992-02-27
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Granted: —
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Expires: 2012-02-27
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Abstract

Abstract A novel silicone polymer which is obtained by addition polymerization of at least one organohydrogenpolysiloxane of the type shown below (1)   R 1 a R 2 b H o SiO (4-a-b-o)/2 (2)   R 1 j H k SiO (4-j-k)/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 essentially used 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.

Inventors

  • 👤 Koji Sakuta

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 17:31
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/894; A61K8/895; A61Q; A61Q19/00; C; C08; C08G; C08G77/00; C08G77/42; C08G77/46; C08G77/48; C08G77/50; C08L; C08L83/00; C08L83/10; C08L83/12; A61Q1/00; A61Q1/02

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 353 words
A silicone polymer which is obtained by addition polymerization of at least one organohydrogenpolysiloxane selected from the group consisting of those of the general formulas (1) and (2) (1)   R¹ a R² b H c SiO (4-a-b-c)/2 (2)   R¹ j H k SiO (4-j-k)/2 and at least one member selected from the group consisting of a polyoxyalkylene of the general formula (A) C m H 2m-1 O(C₂H₄O) p (C₃H₆O) q C m H 2m-1 (A) and an organopolysiloxane of the general formula (B) R¹ d R³ e SiO (4-d-e)/2 provided that at least one selected from the organohydrogenpolysiloxane of the general formula (1) and the polyoxyalkylene of the general formula (A) is essentially used for the addition polymerization, wherein R¹′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, an aralkyl group or a monovalent halogenated hydrocarbon group, R² represents an organic group of the general formula, C n H 2n O(C₂H₄O) f (C₃H₆O) g R⁴, wherein R⁴ represents a hydrogen atom or a saturated organic group having from 1 to 5 carbon atoms or a group of the formula, R⁵-(CO)-, in which R⁵ represents a saturated organic group having from 1 to 5 carbon atoms, 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, R³ 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 ≦ a ≦ 2.5, 0.001 ≦ b ≦ 1, 0.001 ≦ c ≦ 1, 1.0 ≦ d ≦ 3.0, 0.001 ≦ e ≦ 1.5, 1.0 ≦ j ≦ 3.0, and 0.001 ≦ k ≦ 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.
Claim 2
Dependent Claim 41 words
A silicone polymer according to Claim 1, wherein said organohydrogenpolysiloxane of the general formula (1) has a linear structure and comprises R¹₂SiO units, R¹₃SiO 0.5 units, R²R¹SiO units and HR¹SiO units, wherein R¹ and R² are as defined in Claim 1.
Claim 3
Dependent Claim 39 words
A silicone polymer according to Claim 1 or 2 wherein said organohydrogenpolysiloxane of the general formula (2) has R¹₂SiO units, R¹₃SiO 0.5 units and R¹HSiO units at the same time wherein each R¹ is as defined in Claim 1.
Claim 4
Dependent Claim 38 words
A silicone polymer according to Claim 3, wherein said organohydrogenpolysiloxane of the general formula (2) is subjected to addition polymerization with the polyoxyalkylene of the general formula (A) wherein m is an integer of from 3 to 6.
Claim 5
Dependent Claim 24 words
A silicone polymer according to Claim 1, 2 or 3, wherein R³ in the organopolysiloxane of the general formula (B) is a vinyl group.
Claim 6
Dependent Claim 68 words
A silicone polymer according to any one of the preceding claims, wherein 1.9 ≦ a ≦ 2.1, 0.01 ≦ b ≦ 0.50, 0.01 ≦ c ≦ 0.10, 1.9 ≦ d ≦ 2.1, 0.01 ≦ e ≦ 0.50, 3 ≦ f ≦ 20, 0 ≦ g ≦ 20, 1.9 ≦ j ≦ 2.1, 0.01 ≦ k ≦ 1.10, 3 ≦ p ≦ 20, and 0 ≦ q ≦ 20.
Claim 7
Dependent Claim 63 words
A pasty silicone oil composition capable of dispersing water, which comprises a mixture of: 100 parts by weight of a silicone polymer as claimed in any one of the preceding claims; and from 10 to 1000 parts by weight of a silicone oil, said mixture being kneaded under shearing conditions sufficient to cause said silicone polymer to be swollen with said silicone oil.
Claim 8
Dependent Claim 22 words
A composition according to Claim 7, wherein said silicone oil has a viscosity of not higher than 10⁻⁴m²/5 (100 centistokes) at 25°C.
Claim 9
Dependent Claim 27 words
A composition according to Claim 7 or 8, wherein said silicone oil is at least one linear or branched methylpolysiloxane, methylphenylpolysiloxane, ethylpolysiloxane, ethylmethylpolysiloxane, ethylphenylpolysiloxane or cyclic dimethylpolysiloxane.
Claim 10
Dependent Claim 27 words
A composition according to Claim 7, 8 or 9, wherein the shearing conditions sufficient for the swelling of the silicone polymer are created by a three-roll mill.

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