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US4076684A
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US
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Organopolysiloxane compositions and elastomers prepared therefrom
Assignee: Wacker Chemie AG
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Filing: 1976-12-02
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Granted: 1978-02-28
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Expires: 1996-12-02
Abstract
Abstract Organopolysiloxane compositions which contain glass fibers having an average length of up to about 0.5 mm. The compositions are flowable in the absence of a solvent and can be cured at room temperature or moderately elevated temperatures to form elastomers having a high tear resistance and a high durometer.
Inventors
- 👤 Ernst Wohlfarth
- 👤 Wolfgang Hechtl
- 👤 Klaus Matejcek
- 👤 Adolf Kleinschwarzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:48
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08K5/00; C08K5/0008; C08K5/0025
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
22 words
A diorganopolysiloxane composition curable at room temperature to elastomers containing glass fibers which have an average length up to about 0.2 mm.
Claim 2
Dependent Claim
22 words
A diorganopolysiloxane composition curable at room temperature to elastomers containing glass fibers which have an average length up to about 0.2 mm.
Claim 3
Dependent Claim
19 words
The curable composition of claim 1 wherein the glass fibers have an average length up to about 0.1 mm.
Claim 4
Dependent Claim
27 words
The curable composition of claim 1 wherein the glass fibers are substantially free of any agents which tend to improve the adhesion of polymers to a substrate.
Claim 5
Dependent Claim
30 words
The curable composition of claim 1 wherein the diorganopolysiloxane contains terminal hydroxyl groups and further contains a crosslinking agent having at least 3 condensable groups or condensable atoms per molecule.
Claim 6
Dependent Claim
14 words
The curable composition of claim 1 wherein the diorganopolysiloxane composition contains a condensation catalyst.
Claim 7
Dependent Claim
57 words
The curable composition of claim 1 wherein the diorganopolysiloxane has an aliphatic unsaturated bond linked to a silicon atom via carbon in each of its terminal units and also contains an organosilicon compound having at least three Si-bonded hydrogen atoms per molecules and a catalyst which promotes the addition of Si-bonded hydrogen to the aliphatic unsaturated bonds.
Claim 8
Dependent Claim
28 words
The curable composition of claim 1 wherein the glass fibers are present in an amount up to 50 percent by weight based on the weight of the composition.
Claim 9
Dependent Claim
14 words
An organopolysiloxane elastomer containing glass fibers with an average length up to 0.2 mm.
Claim 10
Dependent Claim
14 words
An organopolysiloxane elastomer containing glass fibers with an average length up to 0.2 mm.
Claim 11
Dependent Claim
27 words
The elastomer of claim 8 wherein the glass fibers are present in an amount up to 50 percent by weight based on the weight of the composition.
Claim 12
Dependent Claim
18 words
A process for preparing an organopolysiloxane elastomer which comprises curing the composition of claim 5 at room temperature.
Claim 13
Dependent Claim
23 words
A process for preparing an organopolysiloxane elastomer which comprises heating the composition of claim 5 up to a temperature of about 150° C.
References Cited (Backward Citations)
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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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |