US5032660A
Expired / Lapsed
US
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Curable compositions
Assignee: ACMA Ltd
•
Filing: 1989-10-17
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Granted: 1991-07-16
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Expires: 2009-10-17
Abstract
Abstract Curable compositions comprise a silanol-terminated polyorganosiloxane, a cross-linking agent which is an organic silane free of isocyanate groups and a metal organic compound containing a Ti-O-P bond. The compositions cure on exposure to the atmosphere and, in comparison to known compositions containing organotitanium compounds show a reduced tendency to be discoloured.
Inventors
- 👤 Peter D. Kay
- 👤 David A. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0091; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
A composition curable at room temperature which comprises (a) a silanol-terminated polyorganosiloxane, (b) a cross-linking agent which is an organic silane free of isocyanate groups selected from the class consisting of alkoxysilanes, oxime silanes and alkyl silanes with hydrolysable Si--N groups, and (c) a metal organic compound containing a Ti--O--P bond which is the reaction product of (c1) a titanium orthoester of formula Ti(OR) 4 in which R represents an alkyl group containing up to 10 carbon atoms and (c2) a mixture of mono- and di-alkyl acid phosphates.
Claim 2
Dependent Claim
88 words
A composition curable at room temperature which comprises (a) a silanol-terminated polyorganosiloxane, (b) a cross-linking agent which is an organic silane free of isocyanate groups selected from the class consisting of alkoxysilanes, oxime silanes and alkyl silanes with hydrolysable Si--N groups, and (c) a metal organic compound containing a Ti--O--P bond which is the reaction product of (c1) a titanium orthoester of formula Ti(OR) 4 in which R represents an alkyl group containing up to 10 carbon atoms and (c2) a mixture of mono- and di-alkyl acid phosphates.
Claim 3
Dependent Claim
26 words
A composition according to claim 1 in which the said silanol-terminated polyorganosiloxane is selected from the class consisting of alkyl siloxanes, aryl siloxanes and alkyl-aryl siloxanes.
Claim 4
Dependent Claim
29 words
A composition according to claim 1 in which the said silanol-terminated polyorganosiloxane has a viscosity at 25° C. in the range of from about 100 to about 400,000 centipoise.
Claim 5
Dependent Claim
29 words
A composition according to claim 3 in which the viscosity at 25° C. of the said silanol-terminated polyorganosiloxane is in the range of from about 1000 to 250,000 centipoise.
Claim 6
Dependent Claim
19 words
A composition according to claim 1 in which R represents an alkyl group containing up to 6 carbon atoms.
Claim 7
Dependent Claim
23 words
A composition according to claim 1 in which the said metal organic compound has a Ti:P molar ratio of from 10:1 to 1:4.
Claim 8
Dependent Claim
18 words
A composition according to claim 6 in which the said Ti:P molar ratio is from 2:1 to 1:2.
Claim 9
Dependent Claim
38 words
A composition according to claim 1 in which the said metal organic compound is a compound produced by reacting a mixture of mono- and di-alkyl acid phosphates with a titanium orthoester and removing alcohol formed during the reaction.
Claim 10
Dependent Claim
30 words
A composition according to claim 1 in which the said cross-linking agent is present in an amount of 0.1 to 30 parts by weight per 100 parts of said polyorganosiloxane.
Claim 11
Dependent Claim
27 words
A composition according to claim 9 in which the amount of cross-linking agent is from 0.5 to 25 parts by weight per 100 parts of said polyorganosiloxane.
Claim 12
Dependent Claim
31 words
A composition according to claim 1 in which the amount of said metal organic compound is in the range 0.1 to 25 parts by weight per 100 parts of said polyorganosiloxane.
Claim 13
Dependent Claim
28 words
A composition according to claim 11 in which the amount of metal organic compound is in the range 0.5 to 15 parts by weight per 100 parts polyorganosiloxane.
Claim 14
Dependent Claim
28 words
A composition according to claim 11 in which the amount of metal organic compound is in the range 0.5 to 8 parts by weight per 100 parts polyorganosiloxane.
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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) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |