US5854336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing silicone elastomer compositions
Assignee: Chesebrough Ponds USA Inc
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Filing: 1997-03-20
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Granted: 1998-12-29
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Expires: 2017-03-20
Abstract
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.
Inventors
- 👤 Peter Anthony Divone, Sr.
- 👤 Brian John Dobkowski
- 👤 Michael Charles Cheney
- 👤 Salvador Pliego
- 👤 Walter Anthony Biercevicz
- 👤 Kenneth Paul Manzari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:50
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K9/00; A61K9/20; A61K9/2072; A61K9/2086; A61K9/209; A61K8/02; A61K8/04; A61K8/06; A61K8/068; A61K8/891; A61K8/895; A61K9/0002; A61K9/0004; A61Q; A61Q15/00; A61Q19/00; B; B01; B01J; B01J2/00; B01J2/18; B01J2/20; B29; B29B; B29B9/00; C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
133 words
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.
Claim 2
Dependent Claim
133 words
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.
Claim 3
Dependent Claim
18 words
The process according to claim 1 wherein pumping is performed at a pressure from 1,800 to 10,000 psi.
Claim 4
Dependent Claim
14 words
The process according to claim 1 wherein temperature ranges from 20° to 100° C.
Claim 5
Dependent Claim
19 words
The process according to claim 1 wherein recirculating between step (ii) and (v) ranges from 1 to 200 passes.
Claim 6
Dependent Claim
12 words
The process according to claim 1 wherein the means is a homogenizer.
Claim 7
Dependent Claim
51 words
The process according to claim 5 wherein the homogenizer is a device capable of converting kinetic energy of a high velocity stream of liquid into a high intensity mixing action, conversion being accomplished by pumping the liquid through an orifice against a bladelike obstacle immediately in the stream of the liquid.
Claim 8
Dependent Claim
16 words
The process according to claim 1 wherein the silicone elastomer is dispersed within a silicone carrier.
Claim 9
Dependent Claim
17 words
The process according to claim 1 wherein the average particle size ranges from 0.5 to 5 micron.
Claim 10
Dependent Claim
27 words
The process according to claim 1 wherein the silicone elastomer is a crosslinked non-emulsifying polysiloxane prepared from the reaction of a vinyl monomer and a Si--H siloxane.
Claim 11
Dependent Claim
12 words
The process according to claim 1 wherein the carrier fluid is cyclomethicone.
Claim 12
Dependent Claim
26 words
The process according to claim 1 further comprising applying high-shear force onto the mixed silicone elastomer composition subsequent to step (ii) but prior to step (iv).
Claim 13
Dependent Claim
17 words
The process according to claim 1 wherein the transferring step (iii) is with a positive displacement pump.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-12-28 | 2002-06-29 | 2002-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-28 | 2006-06-29 | 2006-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-28 | 2010-06-29 | 2010-12-29 | $7700.00 | Window Closed / Lapsed |