US4100124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone binding compositions useful in preparing gaskets and packings
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1977-03-28
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Granted: 1978-07-11
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Expires: 1997-03-28
Abstract
Abstract Silicone compositions which are useful as binders for fibrous gasketing and packing materials are disclosed. Such silicone compositions are a mixture of hydroxyl end-blocked diorganosiloxanes, a crosslinking silane, catalysts, emulsifiers and water.
Inventors
- 👤 Kunihiro Ichikawa
- 👤 Terumi Mie
- 👤 Isao Ona
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:56
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/04; C08K5/00; C08K5/04; C08K5/09; C08K5/10; C08K5/54; C08K5/56; C08K5/57; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
105 words
A composition of matter which is useful in preparing gaskets and packings which consists essentially of (A) 100 parts by weight an an α,ω-dihydroxydiorganopolysiloxane having a viscosity of at least 100 cs. at 25° C., (b) 5-150 parts by weight of a silane of the general formula RSi(OR').sub.3 wherein R is a substituted or unsubstituted monovalent hydrocarbon radical, R' is an aliphatic hydrocarbon radical containing 1 to 4 carbon atoms, (C) 0.1-15 parts by weight of an organometallic catalyst, (D) 1-20 parts by weight of an emulsifying agent and (E) 50-1000 parts by weight of water, (F) sufficient solid gasketing material to form a gasket.
Claim 2
Dependent Claim
105 words
A composition of matter which is useful in preparing gaskets and packings which consists essentially of (A) 100 parts by weight an an α,ω-dihydroxydiorganopolysiloxane having a viscosity of at least 100 cs. at 25° C., (b) 5-150 parts by weight of a silane of the general formula RSi(OR').sub.3 wherein R is a substituted or unsubstituted monovalent hydrocarbon radical, R' is an aliphatic hydrocarbon radical containing 1 to 4 carbon atoms, (C) 0.1-15 parts by weight of an organometallic catalyst, (D) 1-20 parts by weight of an emulsifying agent and (E) 50-1000 parts by weight of water, (F) sufficient solid gasketing material to form a gasket.
Claim 3
Dependent Claim
19 words
A composition of matter as claimed in claim 1 in which the solid gasketing material is in fibrous form.
Claim 4
Dependent Claim
18 words
A composition of matter as claimed in claim 2 which contains asbestos fibers as the solid gasketing material.
Claim 5
Dependent Claim
12 words
A composition of matter as claimed in claim 2 which is cured.
Claim 6
Dependent Claim
18 words
A composition of matter as claimed in claim 1 which contains pulp paper as the solid gasketing material.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |