US4585849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
RTV Silicone pastes
Assignee: Bayer AG
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Filing: 1984-09-26
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Granted: 1986-04-29
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Expires: 2004-09-26
Abstract
Abstract In a polydiorganosilixane composition which is capable of storage in the absence of moisture and can be cured at ambient temperature under the action of water or moisture to give elastomers, the composition comprising a diorganosiloxane having reactive terminal groups, a diorganosilane having groups which are sensitive to hydrolysis, a cross-linking agent, and optionally fillers which have a thixotropic effect, condensation catalysts and/or other known auxiliaries, the improvement which comprises employing as the silane (a) a silane of the formula RR.sup.1 Si(NR.sup.2 R.sup.3).sub.2 plus (b) an organosilane of the formula RSi (O--N═R.sup.4).sub.3 in which R, R 1 , R 2 and R 3 each independently is alkyl, aryl, aralkyl and vinyl groups, or R 2 and R 3 together can be an alkanediyl radical having up to 8 C atoms or hydrogen, and R 4 is an R 2 R 3 C group having up to 8 C atoms. The composition cures at room temperature in the presence of moisture to elastomers of desirable physical properties.
Inventors
- 👤 Franz Saykowski
- 👤 Thomas Wurminghausen
- 👤 Hans Stattlegger
- 👤 Theo Achtenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/22; C08G77/26; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
149 words
In a polydiorganosiloxane composition which is capable of storage in the absence of moisture and can be cured at ambient temperature under the action of water or moisture to give elastomers, the composition comprising a diorganosiloxane having reactive terminal groups, a diorganosilane having groups which are sensitive to hydrolysis, a cross-linking agent, and optionally fillers which have a thixotropic effect, and condensation catalysts, the improvement which comprises employing as the silane (a) a silane of the formula RR.sup.1 Si(NR.sup.2 R.sup.3).sub.2 plus (b) an organosilane of the formula RSi(O--N═R.sup.4).sub.3 in which R, R 1 , R 2 and R 3 each independently is alkyl, aryl, aralkyl and vinyl groups, or R 2 and R 3 can be H or together can be an divalent alkyl radical radical having up to 8 C atoms, and R 4 is an R 2 R 3 --C group having up to 8 C atoms.
Claim 2
Dependent Claim
149 words
In a polydiorganosiloxane composition which is capable of storage in the absence of moisture and can be cured at ambient temperature under the action of water or moisture to give elastomers, the composition comprising a diorganosiloxane having reactive terminal groups, a diorganosilane having groups which are sensitive to hydrolysis, a cross-linking agent, and optionally fillers which have a thixotropic effect, and condensation catalysts, the improvement which comprises employing as the silane (a) a silane of the formula RR.sup.1 Si(NR.sup.2 R.sup.3).sub.2 plus (b) an organosilane of the formula RSi(O--N═R.sup.4).sub.3 in which R, R 1 , R 2 and R 3 each independently is alkyl, aryl, aralkyl and vinyl groups, or R 2 and R 3 can be H or together can be an divalent alkyl radical radical having up to 8 C atoms, and R 4 is an R 2 R 3 --C group having up to 8 C atoms.
Claim 3
Dependent Claim
15 words
A composition according to claim 1, in which R and R 1 are methyl groups.
Claim 4
Dependent Claim
23 words
A composition according to claim 1, in which the group (NR 2 R 3 ) is a cyclohexylamino radical or a butylamino radical.
Claim 5
Dependent Claim
13 words
A composition according to claim 1 in which the organosilane (b) is methyltris-(2-butanone-oxime)-silane.
Claim 6
Dependent Claim
63 words
A composition according to claim 1, comprising by weight 100 parts of α, ω-dihydroxypolydiorganosiloxane having a viscosity of 100 to 500,000 mPa.s, 3-15 parts of a dimethyldiaminosilane, 6-30 parts of an organotrioximesilane, 0 to 400 parts of a filler, 0.01-5.0 parts of a condensation catalyst, and 0 to 100 parts by weight of α, ω-bis-(trialkylsiloxy)-polydiorganosiloxane having a viscosity of 100 to 10,000 mPa.s.
Claim 7
Dependent Claim
14 words
A composition according to claim 5, wherein the α, ω-dihydroxypolydiorganosiloxane is an α, ω-dihydroxypolydimethylsiloxane.
Claim 8
Dependent Claim
12 words
A composition according to claim 5, wherein the organotrioximesilane is a methyltrioximesilane.
Claim 9
Dependent Claim
14 words
A composition according to claim 5, wherein the α, ω-bis-(trialkylsiloxy)-polydiorganosiloxane is an α, ω-bis-(trimethylsiloxy)-polydimethylsiloxane.
Claim 10
Dependent Claim
25 words
A composition according to claim 5, wherein the filler is optionally surface-treated chalk or dolomite having a mean particle size of less than 3 μm.
Claim 11
Dependent Claim
18 words
A composition according to claim 5, wherein the condensation catalyst is a metal salt of an organic acid.
Claim 12
Dependent Claim
19 words
A composition according to claim 1, wherein the reactive terminal groups of the polydiorganosiloxane are amino and/or oxime groups.
Claim 13
Dependent Claim
11 words
An elastomer produced by curing a composition according to 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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |