Patent US5431832A successfully refreshed from Google Patents.
US5431832A
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Non-hydrogen evolving siloxane-based lubricant composition
Assignee: Bayer CropScience Inc USA
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Filing: 1993-07-23
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Granted: 1995-07-11
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Expires: 2013-07-23
Abstract
Abstract A siloxane-based lubricant composition contains a mixture of nonreactive and reactive polydimethylsiloxanes, crosslinker and sufficient amounts of surfactant and water to provide an emulsion. The composition contains no methyl hydrogen silane, dimethyl hydrogen silane and/or polymethyl hydrogen siloxane and therefore releases no hydrogen gas during storage or during use.
Inventors
- 👤 Angela M. Crowe
- 👤 David M. Freedman
- 👤 Joyce A. Rodriguez
- 👤 Joseph J. Fanelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:07
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; C10M105/00; C10M105/76; C10M107/00; C10M107/50; C10M129/00; C10M129/02; C10M129/26; C10M129/28; C10M129/30; C10M129/36; C10M139/00; C10M139/04; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14; C10M145/18; C10M145/24; C10M145/26; C10M145/36; C10M145/38; C10M145/40; C10M155/00; C10M155/02; C10M2201/00; C10M2201/02; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/124; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/108; C10M2209/109; C10M2209/12; C10M2227/00; C10M2227/04; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/043; C10M2229/044; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10M2229/05; C10M2229/051; C10M2229/052; C10M2229/053; C10M2229/054; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
169 words
A non-hydrogen evolving siloxane-based lubricant composition containing no methyl hydrogen silane, dimethyl hydrogen silane and/or polymethyl hydrogen siloxane comprising: (a) at least one nonreactive polydimethylsiloxane possessing a viscosity of from about 50 to about 30 million centistokes at 25° C.; b) at least one hydroxy and/or alkoxy terminated reactive polydimethylsiloxane possessing a viscosity of from about 15 to about 5 million centistokes at 25° C.; c) at least one crosslinker; d) at least one surfactant; and, e) water, with nonreactive polydimethylsiloxane (a) being present at a level of from about 20 to about 95 percent by weight of combined nonreactive polydimethylsiloxane (a) and reactive polydimethylsiloxane (b), reactive polydimethylsiloxane (b) being present at a level of from about 5 to about 80 percent by weight of combined nonreactive polydimethylsiloxane (a) and reactive polydimethylsiloxane (b), crosslinker (c) being present at a level of from about 0.01 to about 5 percent by weight of reactive polydimethylsiloxane (b) and surfactant (d) and water (e) being present in amounts sufficient to provide an emulsion.
Claim 2
Dependent Claim
169 words
A non-hydrogen evolving siloxane-based lubricant composition containing no methyl hydrogen silane, dimethyl hydrogen silane and/or polymethyl hydrogen siloxane comprising: (a) at least one nonreactive polydimethylsiloxane possessing a viscosity of from about 50 to about 30 million centistokes at 25° C.; b) at least one hydroxy and/or alkoxy terminated reactive polydimethylsiloxane possessing a viscosity of from about 15 to about 5 million centistokes at 25° C.; c) at least one crosslinker; d) at least one surfactant; and, e) water, with nonreactive polydimethylsiloxane (a) being present at a level of from about 20 to about 95 percent by weight of combined nonreactive polydimethylsiloxane (a) and reactive polydimethylsiloxane (b), reactive polydimethylsiloxane (b) being present at a level of from about 5 to about 80 percent by weight of combined nonreactive polydimethylsiloxane (a) and reactive polydimethylsiloxane (b), crosslinker (c) being present at a level of from about 0.01 to about 5 percent by weight of reactive polydimethylsiloxane (b) and surfactant (d) and water (e) being present in amounts sufficient to provide an emulsion.
Claim 3
Dependent Claim
46 words
The lubricant composition of claim 1 wherein nonreactive polydimethylsiloxane (a) contains at least one nonreactive polydimethylsiloxane (i) possessing a viscosity of at least 100,000 centistokes at 25° C. and at least one nonreactive polydimethylsiloxane (ii) possessing a viscosity of less than 100,000 centistokes at 25° C.
Claim 4
Dependent Claim
71 words
The lubricant composition of claim 2 wherein nonreactive polydimethylsiloxane (i) possesses a viscosity of from about 10 to about 25 million centistokes at 25° C. and nonreactive polydimethylsiloxane (ii) is selected from the group consisting of nonreactive polydimethylsiloxanes possessing a viscosity of from about 50 to about 200 centistokes at 25° C., nonreactive polydimethylsiloxanes possessing a viscosity of from about 10,000 to about 50,000 centistokes at 25° C. and combinations thereof.
Claim 5
Dependent Claim
25 words
The lubricant composition of claim 2 wherein the weight ratio of nonreactive polydimethylsiloxane (i) to nonreactive polydimethylsiloxane (ii) is from about 1:10 to about 10:1.
Claim 6
Dependent Claim
25 words
The lubricant composition of claim 2 wherein the weight ratio of nonreactive polydimethylsiloxane (i) to nonreactive polydimethylsiloxane (ii) is from about 1:5 to about 5:1.
Claim 7
Dependent Claim
25 words
The lubricant composition of claim 2 wherein the weight ratio of nonreactive polydimethylsiloxane (i) to nonreactive polydimethylsiloxane (ii) is from about 1:10 to about 10:1.
Claim 8
Dependent Claim
25 words
The lubricant composition of claim 3 wherein the weight ratio of nonreactive polydimethylsiloxane (i) to nonreactive polydimethylsiloxane (ii) is from about 1:5 to about 5:1.
Claim 9
Dependent Claim
23 words
The lubricant composition of claim 1 wherein crosslinker (c) possesses a viscosity of from about 50 to about 10,000 centistokes at 25° C.
Claim 10
Dependent Claim
23 words
The lubricant composition of claim 1 wherein crosslinker (c) is selected form the group consisting of organotrialkoxysilane, organotriacyloxysilane, tetraalkyl silicate and combinations thereof.
Claim 11
Dependent Claim
11 words
The lubricant composition of claim 1 wherein crosslinker (c) is methyltrimethoxysilane.
Claim 12
Dependent Claim
91 words
The lubricant composition of claim 1 wherein nonreactive polydimethylsiloxane (a) is present in the lubricant composition at a level of from about 40 to about 75 weight percent of the total weight of nonreactive polydimethylsiloxane (a) and reactive polydimethylsiloxane (b), reactive polydimethylsiloxane (b) is present at a level of from about 25 to about 60 weight percent of the total weight of nonreactive polydimethylsiloxane (a) and reactive polydimethylsiloxane (b) and crosslinker (c) is present at a level of from about 0.02 to about 2 percent by weight of reactive polydimethylsiloxane (b).
Claim 13
Dependent Claim
11 words
The lubricant composition of claim 1 containing a polymeric film former.
Claim 14
Dependent Claim
16 words
The lubricant composition of claim 12 wherein the polymeric film former is an acrylic film former.
Claim 15
Dependent Claim
65 words
The lubricant composition of claim 1 containing at least one additional component distinct from the components a), b), c), d), and e), in the aforementioned claim selected from the group consisting of a crosslinking catalyst, a lubricant in addition to that recited in the aforementioned claim, air bleed agent, defoaming agent, thickening agent which functions as a thickener, filler or stabilizer, preservative and combinations thereof.
Claim 16
Dependent Claim
11 words
The lubricant composition of claim 14 containing a polymeric film former.
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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) | 1998-07-10 | 1999-01-09 | 1999-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-10 | 2003-01-09 | 2003-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-10 | 2007-01-09 | 2007-07-11 | $7700.00 | Window Closed / Lapsed |