US6057386A
Expired / Lapsed
US
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Silicone oil emulsion, composition and method of manufacture
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1999-03-08
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Granted: 2000-05-02
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Expires: 2019-03-08
Abstract
Abstract A silicone emulsion contains cross-linked silicone particles in silicone oil drops dispersed in water. A method for the preparation of the emulsion, and a method for the preparation of a silicone composition with cross-linked silicone particles uniformly dispersed in a silicone oil, is also provided.
Inventors
- 👤 Yoshitsugu Morita
- 👤 Kazuo Kobayashi
- 👤 Ryuji Tachibana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:45
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K8/00; A61K8/02; A61K8/0204; A61K8/0241; A61K8/04; A61K8/044; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/895; C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/09; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
129 words
A silicone oil emulsion comprising cross-linked silicone particles which have an average particle diameter of 0.1 to 100 μm, the crosslinked silicone particles being contained in silicone oil drops having an average diameter of 0.5 to 500 μm, the silicone oil drops containing the cross-linked silicone particles being dispersed in water, the diameter of the cross-linked silicone particles being smaller than the diameter of the silicone oil drops, the cross-linked silicone particles being prepared by a hydrosilylation cross-linking reaction or a condensation cross-linking reaction between (i) an organopolysiloxane having in its molecule at least two alkenyl groups and an organopolysiloxane having in its molecule at least two silicone-bonded hydrogen atoms, or (ii) an organopolysiloxane which contains a hydrolyzable group and a silane-type cross-linking agent having a hydrolyzable group, respectively.
Claim 2
Dependent Claim
129 words
A silicone oil emulsion comprising cross-linked silicone particles which have an average particle diameter of 0.1 to 100 μm, the crosslinked silicone particles being contained in silicone oil drops having an average diameter of 0.5 to 500 μm, the silicone oil drops containing the cross-linked silicone particles being dispersed in water, the diameter of the cross-linked silicone particles being smaller than the diameter of the silicone oil drops, the cross-linked silicone particles being prepared by a hydrosilylation cross-linking reaction or a condensation cross-linking reaction between (i) an organopolysiloxane having in its molecule at least two alkenyl groups and an organopolysiloxane having in its molecule at least two silicone-bonded hydrogen atoms, or (ii) an organopolysiloxane which contains a hydrolyzable group and a silane-type cross-linking agent having a hydrolyzable group, respectively.
Claim 3
Dependent Claim
19 words
The silicone oil emulsion of claim 1 wherein the silicone oil has a viscosity of 1 to 100,000,000 mPa.s.
Claim 4
Independent Claim
159 words
A method of manufacturing a silicone oil emulsion containing cross-linked silicone particles of an average particle diameter of 0.1 to 100 μm in silicone oil drops of an average drop diameter of 0.5 to 500 μm and wherein the diameter of the cross-linked silicone particles is smaller than the diameter of the silicone oil drops, the method comprising dispersing in water a cross-linkable silicone composition, the cross-linkable composition containing a non-cross-linkable silicone oil in an amount which exceeds the amount of non-cross-linkable silicone oil which can be held by the product of crosslinking of the cross-linkable silicone composition, the cross-linked silicone particles being prepared by a hydrosilylation cross-linking reaction or a condensation cross-linking reaction between (i) an organopolysiloxane having in its molecule at least two alkenyl groups and an organopolysiloxane having in its molecule at least two silicone-bonded hydrogen atoms, or (ii) an organopolysiloxane which contains a hydrolyzable group and a silane-type cross-linking agent having a hydrolyzable group, respectively.
Claim 5
Independent Claim
159 words
A method of manufacturing a silicone oil emulsion containing cross-linked silicone particles of an average particle diameter of 0.1 to 100 μm in silicone oil drops of an average drop diameter of 0.5 to 500 μm and wherein the diameter of the cross-linked silicone particles is smaller than the diameter of the silicone oil drops, the method comprising dispersing in water a cross-linkable silicone composition, the cross-linkable composition containing a non-cross-linkable silicone oil in an amount which exceeds the amount of non-cross-linkable silicone oil which can be held by the product of crosslinking of the cross-linkable silicone composition, the cross-linked silicone particles being prepared by a hydrosilylation cross-linking reaction or a condensation cross-linking reaction between (i) an organopolysiloxane having in its molecule at least two alkenyl groups and an organopolysiloxane having in its molecule at least two silicone-bonded hydrogen atoms, or (ii) an organopolysiloxane which contains a hydrolyzable group and a silane-type cross-linking agent having a hydrolyzable group, respectively.
Claim 6
Dependent Claim
25 words
The method of manufacturing a silicone oil emulsion according to claim 3 wherein the non-cross-linkable silicone oil has a viscosity of 1 to 100,000,000 mPa.s.
Claim 7
Independent Claim
154 words
A method for the preparation of a silicone composition containing cross-linked silicone particles with an average diameter of 0.1 to 100 μm which are dispersed in a silicone oil, the method comprising removing water from a silicone oil emulsion which contains the cross-linked silicone particles, the particles being contained in silicone oil drops of an average diameter of 0.5 to 500 μm, the silicone oil drops containing the cross-linked silicone particles being dispersed in the water, the diameter of the cross-linked silicone particles being smaller than the diameter of the silicone oil drops, the cross-linked silicone particles being prepared by a hydrosilylation cross-linking reaction or a condensation cross-linking reaction between (i) an organopolysiloxane having in its molecule at least two alkenyl groups and an organopolysiloxane having in its molecule at least two silicone-bonded hydrogen atoms, or (ii) an organopolysiloxane which contains a hydrolyzable group and a silane-type cross-linking agent having a hydrolyzable group, respectively.
Claim 8
Independent Claim
154 words
A method for the preparation of a silicone composition containing cross-linked silicone particles with an average diameter of 0.1 to 100 μm which are dispersed in a silicone oil, the method comprising removing water from a silicone oil emulsion which contains the cross-linked silicone particles, the particles being contained in silicone oil drops of an average diameter of 0.5 to 500 μm, the silicone oil drops containing the cross-linked silicone particles being dispersed in the water, the diameter of the cross-linked silicone particles being smaller than the diameter of the silicone oil drops, the cross-linked silicone particles being prepared by a hydrosilylation cross-linking reaction or a condensation cross-linking reaction between (i) an organopolysiloxane having in its molecule at least two alkenyl groups and an organopolysiloxane having in its molecule at least two silicone-bonded hydrogen atoms, or (ii) an organopolysiloxane which contains a hydrolyzable group and a silane-type cross-linking agent having a hydrolyzable group, respectively.
Claim 9
Dependent Claim
25 words
The method for the preparation of a silicone composition according to claim 5 wherein the silicone oil has a viscosity of 1 to 100,000,000 mPa.s.
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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) | 2003-05-02 | 2003-11-01 | 2004-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-02 | 2007-11-01 | 2008-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-02 | 2011-11-01 | 2012-05-02 | $7700.00 | Window Closed / Lapsed |