Emulsion containing crosslinked and non-cross linked silicone polyethers

A silicone polyether, non-crosslinking technology, applied in the directions of cosmetic preparations, pharmaceutical formulas, cosmetic preparations, etc., can solve the problems of lack of teaching and the like

Inactive Publication Date: 2004-07-14
DOW CORNING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, in this respect, the patent does not teach the use of non-crosslinked silicone polyethers in combination with crosslinked silicone elastomers containing no non-oxyalkylene units to prepare emulsions without the application of any mechanical shear forces

Method used

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Examples

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Embodiment

[0059] The following examples are provided to illustrate the invention in more detail.

[0060] Example 1 - Description of the first embodiment

[0061] An oil-in-water microemulsion containing an in situ prepared cross-linked silicone polyether was formed by mixing and hand shaking the following components in a sealed vial:

[0062] a.2.4983g general formula is MD 22 D' 2 The non-crosslinked silicone polyether of M, wherein M is (CH 3 ) 3 SiO-, D is (CH 3 ) 2 SiO=, and D' is (CH 3 )(EO 12 PO 12 ) SiO =;

[0063] b.2.5224g general formula is CH 3 (CH 2 ) 5 OCH 2 CH 2 OCH 2 CH 2 OH co-surfactant diethylene glycol hexyl ether;

[0064] c.2.5633g deionized water;

[0065] d.0.2767g general formula is MD 8.7 D' 3.7 The polysiloxane containing ≡Si-H of M, wherein M is (CH 3 ) 3 SiO-, D is (CH 3 ) 2 SiO=, and D' is (CH 3 )(H)SiO=;

[0066] e.2.0010g volatile silicone oil D5, namely decamethylcyclopentasiloxane;

[0067] f.0.1967g general formula is CH 2 =...

Embodiment 2

[0071] Example 2 - Description of the second embodiment

[0072] An oil-in-water microemulsion containing cured particles of a cross-linked silicone elastomer (with no oxyalkylene units in its molecule) was formed by adding the following components to a sealed vial:

[0073] a.4.9891 g of cross-linked silicone elastomers without oxyalkylene units in the molecule. The crosslinked silicone elastomer was swelled with about 86.5% by weight of the volatile silicone oil decamethylcyclopentasiloxane. By making (i) polysiloxane MD containing ≡Si-H 8.7 D' 3.7 M, where M is (CH 3 ) 3 SiO-, D is (CH 3 ) 2 SiO=, and D' is (CH 3 ) (H)SiO=; react with (ii) α,ω-diene 1,5-hexadiene to prepare D 5 swollen elastomer. According to the method of US Patent 5654362 (August 5, 1997), in D 5 react in the presence of .

[0074] b.5.0145g general formula is MD 22 D' 2 The non-crosslinked silicone polyether of M, wherein M is (CH 3 ) 3 SiO-, D is (CH 3 ) 2 SiO=, and D' is (CH 3 )(EO 1...

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Abstract

Emulsions are prepared by heating and polymerizing a mixture containing (i) a non-crosslinked silicone polyether; (ii) optionally, a cosurfactant which can be a monohydroxy alcohol, diol, triol, or glycol ether; (iii) an =Si-H containing polysiloxane; (iv) a mono-alkenyl polyether; (v) an alpha,omega-diene, alpha,omega-diyne, or alpha,omega-ene-yne; (vi) optionally, a silicone oil such as (a) a low molecular weight linear or cyclic volatile methyl siloxane, or (b) a low molecular weight linear or cyclic volatile or non-volatile alkyl or aryl siloxane; (vii) a platinum catalyst; and (viii) water.

Description

technical field [0001] The present invention relates to emulsions and their preparation using non-crosslinked silicone polyethers and crosslinked silicone polyethers. In a first embodiment, the emulsion comprising non-crosslinked silicone polyethers and crosslinked silicone polyethers is prepared by emulsion polymerization. In a second embodiment, emulsions comprising non-crosslinked silicone polyethers and crosslinked silicone elastomers containing no alkylene oxide units are prepared mechanically. Background technique [0002] Although U.S. Patent No. 5,387,417 (7 February 1995) suggests the use of certain non-crosslinked silicone polyethers in combination with certain crosslinked silicone polyethers to make emulsions, this patent does not teach the use of emulsion polymerization to make emulsions , the first embodiment of the present invention. [0003] In addition, when the emulsions in this patent are mechanically prepared, the patent does not teach the use of non-cro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/06A61K8/89C08G77/46C08G77/50C08J3/03C08L83/12C08L83/14
CPCC08J2383/04C08J3/03C08L83/12C08L83/14
Inventor Z·林
Owner DOW CORNING CORP
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