US5109094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of organosilicon compounds
Assignee: Dow Silicones UK Ltd
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Filing: 1990-01-31
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Granted: 1992-04-28
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Expires: 2010-01-31
Abstract
Abstract A process for the production of an organosilicon condensation product which comprises contacting (A) at least one organosilicon compound having in the molecule at least one silicon-bonded hydroxyl group, the organic substituents being selected from monovalent hydrocarbon groups having from 1 to 14 carbon atoms and monovalent substituted hydrocarbon groups having from 1 to 10 carbon atoms in which the substituents are selected from amino, halogen, mercapto, hydroxyl, amido and ester, with (B) a hydroxide selected from the group consisting of magnesium, calcium, strontium and barium hydroxides.
Inventors
- 👤 Sian B. Rees
- 👤 Stephen Westall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:33
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
A process for the production of an organosilicon condensation product which comprises contacting at a temperature of 30° C. to 200° C. (A) at least one organosilicon compound having in the molecule at least one silanol group and wherein the organo substituents are selected from the group consisting of monovalent hydrocarbon groups having 1 to 14 carbon atoms and monovalent substituted hydrocarbon groups having 1 to 10 carbon atoms in which the substituents are selected from the group consisting of amino, halogen, mercapto, hydroxyl, amido and ester, with (B) a hydroxide selected from the group consisting of magnesium, calcium, strontium and barium hydroxides.
Claim 2
Dependent Claim
103 words
A process for the production of an organosilicon condensation product which comprises contacting at a temperature of 30° C. to 200° C. (A) at least one organosilicon compound having in the molecule at least one silanol group and wherein the organo substituents are selected from the group consisting of monovalent hydrocarbon groups having 1 to 14 carbon atoms and monovalent substituted hydrocarbon groups having 1 to 10 carbon atoms in which the substituents are selected from the group consisting of amino, halogen, mercapto, hydroxyl, amido and ester, with (B) a hydroxide selected from the group consisting of magnesium, calcium, strontium and barium hydroxides.
Claim 3
Dependent Claim
21 words
A process as claimed in claim 1 wherein the organosilicon compound (A) is passed over or through a bed containing (B).
Claim 4
Dependent Claim
27 words
A process as claimed in claim 1 wherein the hydroxide (B) is dispersed in the organosilicon compound (A) and is thereafter separated from the organosilicon condensation product.
Claim 5
Dependent Claim
29 words
A process as claimed in claim 3 wherein the hydroxide (B) is employed in an amount of from 0.001 to 5% by weight based on the weight of (A).
Claim 6
Dependent Claim
25 words
A process as claimed in claim 1 wherein (B) is present dispersed in or on a particulate solid which is inert under the reaction conditions.
Claim 7
Dependent Claim
15 words
A process as claimed in claim 1 wherein organosilicon compound (A) is a silanol-terminated polydiorganosiloxane.
Claim 8
Dependent Claim
25 words
A process as claimed in claim 1 wherein (A) and (B) are contacted at a temperature in the range from 70° C. to 150° C.
Claim 9
Dependent Claim
37 words
A process as claimed in claim 1 wherein the organosilicon compound (A) comprises both (i) a silanol-terminated polydiorganosiloxane and (ii) a polydiorganosiloxane terminated with a silanol group at one end and a triorganosiloxy group at the other.
Claim 10
Dependent Claim
33 words
A process as claimed in claim 1 wherein at least 50% of the total substituents in (A) are methyl and any remaining substituents are selected from the group consisting of phenyl and vinyl.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-28 | 1995-10-28 | 1996-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-28 | 1999-10-28 | 2000-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-28 | 2003-10-28 | 2004-04-28 | $7700.00 | Window Closed / Lapsed |