EP0829253A2
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EP
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Method for the preparation of improved water-base toiletry composition
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1997-09-02
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Granted: —
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Expires: 2017-09-02
Abstract
Abstract Proposed is a reliable method for the preparation of a water-base hair-care or skin-care toiletry preparation capable of imparting the hair or skin of the user with excellent touch feeling of smoothness and sleekness. The method comprises (a) preparing an aqueous dispersion of globular particles of a cured silicone rubber having a specified average particle diameter by the in situ cross-linking hydrosilation reaction in liquid droplets of a vinyl group-containing dimethylpolysiloxane and an organohydrogenpolysiloxane in combination in the presence of a surface active agent and (b) admixing a base mixture consisting of the principal ingredients of a water-base toiletry composition with a specified amount of the aqueous dispersion of the cured silicone rubber particles.
Inventors
- 👤 Sathoshi c/o Shin-Etsu Chemical Co. Ltd. Kawata
- 👤 Morizo c/o Shin-Etsu Chemical Co. Ltd. Nakazato
- 👤 Yoshinori c/o Shin-Etsu Chemical Co. Ltd. Inokuchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 15:54
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K8/00; A61K8/02; A61K8/0241; A61K8/025; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/895; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; A61K2800/80; A61K2800/81; A61Q5/00; A61Q5/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
A method for the preparation of a water-base toiletry prepa-ration
which comprises the steps of: (a) preparing an aqueous dispersion of spherical particles of a cured
silicone rubber having an average particle diameter in the
range from 0.1 to 100 µm dispersed in an aqueous medium containing
a surface active agent, the amount of the cured silicone
rubber particles being in the range from 1 to 70% by weight, the
amount of the surface active agent being in the range from 0.1 to
20% by weight and the balance being water, each based on the
amount of the aqueous dispersion; and (b) admixing a base mixture of a water-base toiletry preparation
with the aqueous dispersion of the cured silicone rubber particles
prepared in step (a) in such a proportion that the content of the
cured silicone rubber particles in the toiletry preparation is in the
range from 0.1 to 30% by weight based on the total amount of the
non-volatile matters in the base mixture.
Claim 2
Dependent Claim
99 words
The method for the preparation of a water-base toiletry preparation
as claimed in claim 1 in which the aqueous dispersion of
cured silicone rubber particles is prepared in step (a) by the method
of in situ crosslinking reaction in a mixture consisting of an alkenyl
group-containing diorganopolysiloxane and an organohydrogenpolysiloxane
jointly emulsified in an aqueous medium containing
a surface active agent by the mechanism of the hydrosilation
reaction between the alkenyl groups in the alkenyl group-containing
diorganopolysiloxane and the silicon-bonded hydrogen
atoms in the organohydrogenpolysiloxane in the presence of a platinum
compound as a catalyst for the hydrosilation reaction.
Claim 3
Dependent Claim
52 words
The method for the preparation of a water-base toiletry preparation
as claimed in claim 1 in which the content of the cured silicone
rubber particles in the toiletry preparation is in the range
from 1 to 10% by weight based on the total amount of the non-volatile
matters in the base mixture.
Claim 4
Dependent Claim
31 words
The method for the preparation of a water-base toiletry preparation
as claimed in claim 1 in which the surface active agent used
in step (a) is a non-ionic surface active agent.
Claim 5
Dependent Claim
46 words
The method for the preparation of a water-base toiletry preparation
as claimed in claim 1 in which the spherical particles of a
cured silicone rubber in the aqueous dispersion prepared in step (a)
have an average particle diameter in the range from 1 to 10 µm.
Claim 6
Dependent Claim
26 words
The method for the preparation of a water-base toiletry preparation
as claimed in claim 2 in which the alkenyl group-containing
diorganopolysiloxane is a vinyl group-containing dimethylpolysiloxane.
Claim 7
Dependent Claim
22 words
The method for the preparation of a water-base toiletry preparation
as claimed in claim 2 in which the organohydrogenpolysiloxane
is a methylhydrogenpolysiloxane.
References Cited (Backward Citations)
No citation records indexed.
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