US3686357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room temperature vulcanizable silicone rubber stocks
Assignee: Midland Silicones Ltd
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Filing: 1970-11-19
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Granted: 1972-08-22
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Expires: 1990-11-19
Abstract
Abstract A silicone rubber stock which cures at room temperature under the influence of water and exhibits improved adhesion to substrates, particularly metals, is prepared by mixing a polyalkoxysilyl endblocked diorganosiloxane with a liquid siloxane containing amino or polyamino groups bonded to silicon and a curing catalyst.
Inventors
- 👤 Carl Anthony Cheeseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:37
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/18; Y; Y10; Y10S; Y10S528/00; Y10S528/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
28 words
A composition as claimed in claim 1 wherein the R'''' radicals and substantially all of the radicals bonded to non-terminal silicon atoms in polydiorganosiloxane (a) are methyl radicals.
Claim 2
Dependent Claim
26 words
A composition as claimed in claim 1 wherein the diorganopolysiloxane (a) has a viscosity within the range from 1, 000 to 10,000 cs. at 25* C.
Claim 3
Dependent Claim
24 words
A composition as claimed in claim 1 wherein in the liquid organosiloxane (b) the silicon-bonded amino-substituted radicals -QZ are radicals of the formula -(CH2)3NHCH2CH2NH2.
Claim 4
Dependent Claim
37 words
A composition as claimed in claim 1 wherein the proportion of liquid organosiloxane (b) present is sufficient to provide from 3 to 20 -QNX2 or -QZ radicals for every 1,000 total silicon atoms in (a) and (b).
Claim 5
Dependent Claim
12 words
A composition as claimed in claim 1 which also contains a filler.
Claim 6
Dependent Claim
37 words
A process for the production of an article comprising a substrate having bonded thereto an organopolysiloxane elastomer which comprises applying to a substrate a curable composition as claimed in claim 1 and exposing the composition to water.
Claim 7
Dependent Claim
16 words
An article comprising a substrate having bonded thereto an organopolysiloxane elastomer as defined in claim 1.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |