US 5,854,336 AGranted

Process for preparing silicone elastomer compositions

AssigneeChesebrough-Pond's USA Co., Division of Conopco, Inc.

InventorsPeter Anthony Divone, Sr., Brian John Dobkowski, Michael Charles Cheney, Salvador Pliego, Walter Anthony Biercevicz, Kenneth Paul Manzari

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Abstract

A process is provided for preparing a silicone elastomer composition for cosmetic products which includes the steps of feeding the silicone elastomer composition comprising a silicone rubber in a carrier fluid into a reactor, mixing the composition in the reactor, delivering the composition from the reactor into a high pressure pump, pumping the fluid into a device for reducing particles of rubber into smaller sizes and recirculating the resultant size reduced particles back to the reactor. The device for reducing particle size is preferably a high pressure fed homogenizer, most advantageously a sonolator.

Claims12

Dependent claims

A process for preparing silicone elastomer compositions for use in cosmetic products which compositions comprise a silicone elastomer within a carrier fluid, the process comprising the steps of:

(i) feeding the silicone elastomer composition into a reactor;
(ii) mixing the silicone elastomer composition through agitation in the reactor;
(iii) transferring the agitated silicone elastomer composition from the reactor into a high pressure pump;
(iv) pumping the mixed silicone elastomer composition at a pressure ranging from 500 to 40,000 psi from the high pressure pump into a means for reducing the silicone elastomer within the composition into a smaller particle size;
(v) optionally, recirculating the resultant smaller sized silicone elastomer particles into the reactor;
and
(vi) recovering a silicone elastomer composition wherein the silicone elastomer average particle size ranges from 0.05 to 30 micron.

4 more elements

Dependencies are inferred from the claim text.