Emulsions Of Silicone Elastomer And Silicone Organic Elastomer Gels

• US 20100209367A1
• Filed: 09/18/2008
• Published: 08/19/2010
• Est. Priority Date: 09/25/2007
• Status: Active Grant

• Current Assignee: Dow, Inc.
• Original Assignee: Dow, Inc.
• Inventors: Humphrey, Jason, Lin, Shaow Burn
• Granted Patent: US 8,236,890 B2
• Time in Patent Office: Days
• US Class Current: 424/59
• CPC Class Codes: A61K 8/042 Gels
• CPC Class Codes: A61K 8/06 Emulsions
• CPC Class Codes: A61K 8/895 containing silicon bound to unsaturated aliphatic groups, e.g. vinyl dimethicone
• CPC Class Codes: A61Q 17/04 Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C09D 183/04 Polysiloxanes

Abstract

Aqueous emulsions are disclosed of a gel or gel paste containing a silicone elastomer from the reaction an organohydrogensiloxane having at least two SiH containing cyclosiloxane rings in its molecule and a compound having at least two aliphatic unsaturated groups in its molecule.

Claims

1. An aqueous emulsion composition comprising:

i) a gel or gel paste containing a silicone elastomer or a silicone organic elastomer from the reaction of;

A) an organohydrogensiloxane having at least two SiH containing cyclosiloxane rings in its molecule,

B) a compound having at least two aliphatic unsaturated groups in its molecule, and

C) a hydrosilylation catalyst,

D) an optional carrier fluid, and

ii) an emulsifier.

2. The emulsion of claim 1 further comprising;

E) an optional personal or healthcare active.

3. The emulsion of claim 1 wherein the emulsion is an oil/water emulsion having an internal oil phase comprising i) the gel and a continuous aqueous phase.

4. The emulsion of claim 3 wherein the emulsion contains;

5 to 90 weight percent of the internal oil phase,

0.5 to 20 weight percent of the emulsifier,

and sufficient water to sum to 100 weight percent.

7. The use of the emulsion from claim 1 in personal care and health care applications.

5. A process for preparing an aqueous emulsion comprising:

I) mixing

i) a gel or gel paste containing a silicone elastomer or a silicone organic elastomer from the reaction of;

A) an organohydrogensiloxane having at least two SiH containing cyclosiloxane rings in its molecule,

B) a compound having at least two aliphatic unsaturated groups in its molecule, and

C) a hydrosilylation catalyst,

D) an optional carrier fluid,

E) an optional personal or healthcare active, and

ii) an emulsifier,

II) admixing incremental amounts of water to the mixture of step Ito form a water continuous emulsion,

III) optionally, shear mixing the water continuous emulsion.

6. The aqueous emulsion prepared according to the method of claim 5.