US3624022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room temperature curing organopolysiloxanes
Assignee: Dow Silicones Corp
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Filing: 1970-04-01
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Granted: 1971-11-30
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Expires: 1990-04-01
Abstract
Abstract Compositions comprising 100 parts of a hydroxyl-terminated polymer of RRfSiO- units, in which R is a lower alkyl radical and Rf is a beta-perfluoroalkylethyl radical, 0.5-20 parts of a silane of the formula R''SiX3, in which R'' is a phenyl or vinyl radical or mixtures thereof and X is a methoxy or ethoxy radical; and 0.1 to 10 parts of certain metal salts of carboxylic acids, such as stannous octoate, will cure at room temperature to give reversion resistant fluorosilicone elastomers.
Inventors
- 👤 Marcus E Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:17
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/22; C08G77/24; C08L83/08; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1018; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
14 words
The composition of claim 1 wherein the polysiloxane a. consists essentially of CF3CH2CH2(CH3)SiO- units.
Claim 2
Dependent Claim
11 words
The composition of claim 1 wherein the silane (b) is phenyltrimethoxysilane.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein (c) is dibutyl tin diacetate.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein the silane (b) is a mixture of phenyltrimethoxysilane and vinyltrimethoxysilane.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein a filler is also present.
Claim 6
Dependent Claim
11 words
The composition of claim 3 wherein a filler is also present.
Claim 7
Dependent Claim
11 words
The composition of claim 5 wherein a filler is also present.
Claim 8
Dependent Claim
26 words
The composition of claim 6 including from about 10 to 200 parts by weight of a filler per 100 parts by weight of the curable composition.
Claim 9
Dependent Claim
10 words
The composition of claim 9 wherein the filler is silica.
Claim 10
Dependent Claim
33 words
The composition of claim 9 wherein said filler is present in an amount in the range of about 10 to 50 parts by weight per 100 parts by weight of the curable composition.
Claim 11
Dependent Claim
13 words
The composition of claim 11 wherein the filler material is hollow glass spheres.
Claim 12
Dependent Claim
82 words
In accordance with claim 1, a cured sealant composition prepared by mixing the ingredients consisting essentially of: a. 100 parts by weight of hydroxyl-endblocked 3,3,3-trifluoropropylmethylpolysiloxane having a viscosity of from 10,000 to 200,000 cs. at 25* C.; b. from 0.5 to 20 parts by weight of phenyltrimethoxysilane, c. from 0.1 to 10 parts by weight of dibutyl tin diacetate, and d. from 10 to 50 parts by weight per 100 parts of the mixture of (a), (b) and (c), of silica filler.
Claim 13
Dependent Claim
86 words
In accordance with claim 1, a cured sealant composition prepared by mixing the ingredients consisting essentially of: a. 100 parts by weight of hydroxyl-endblocked 3,3,3-trifluoropropylmethylpolysiloxane having a viscosity of from 10,000 to 200,000 cs. at 25* C., b. from 0.5 to 20 parts by weight of a mixture of phenyltrimethoxysilane and vinyltrimethoxysilane, c. from 0.1 to 10 parts by weight of dibutyl tin diacetate, and d. from 10 to 50 parts by weight per 100 parts of the mixture (a), (b) and (c), of silica filler.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |