US3979344A
Expired / Lapsed
US
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Vulcanizable silicon terminated polyurethane polymer composition having improved cure speed
Assignee: Adco Products Inc
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Filing: 1974-11-19
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Granted: 1976-09-07
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Expires: 1994-11-19
Abstract
Abstract Room-temperature-curable silicon-terminated organic sealant compositions having improved cure speeds, and metal and glass primer compositions for use therewith. These sealant compositions comprise a blend of a small amount of N-beta-aminoethyl, gamma - aminopropyl trimethoxy silane with an organosilicon-capped, isocyanate-terminated polyurethane polymer. The composition preferably further comprises a moisture-curing catalyst such as dibutyl tin diacetate.
Inventors
- 👤 Earle Ruskin Bryant
- 👤 Joseph August Weis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; B; B32; B32B; B32B15/00; B32B15/04; C08K; C08K5/00; C08K5/54; C09; C09J; C09J175/00; C09J175/04; C08L; C08L2666/00; C08L2666/28; C08L2666/44; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
107 words
A sealant composition comprising a prepolymer which is a blend of: a. a silicon terminated vulcanizable polyurethane polymer of the formula ##EQU2## wherein R is a lower alkyl radical of from 1 to 6 carbon atoms; wherein R' is a divalent bridging radical selected from the groups consisting of a divalent hydrocarbon radical, a divalent hydrocarbon ether radical and a divalent hydrocarbon amino radical; and wherein Z is a member selected from the group consisting of --S and --NR", where R" is H or a lower alkyl radical of from 1 to 6 carbon atoms. with b. a small amount of N-beta aminoethyl, gamma aminopropyl trimethoxy silane.
Claim 2
Dependent Claim
107 words
A sealant composition comprising a prepolymer which is a blend of: a. a silicon terminated vulcanizable polyurethane polymer of the formula ##EQU2## wherein R is a lower alkyl radical of from 1 to 6 carbon atoms; wherein R' is a divalent bridging radical selected from the groups consisting of a divalent hydrocarbon radical, a divalent hydrocarbon ether radical and a divalent hydrocarbon amino radical; and wherein Z is a member selected from the group consisting of --S and --NR", where R" is H or a lower alkyl radical of from 1 to 6 carbon atoms. with b. a small amount of N-beta aminoethyl, gamma aminopropyl trimethoxy silane.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein the small amount is between about 0.5 and about 2.0%, based on the polymer weight.
Claim 4
Dependent Claim
15 words
The composition of claim 2, wherein the composition additionally comprises a conventional silanol condensation catalyst.
Claim 5
Dependent Claim
22 words
The composition of claim 3 wherein said catalyst is present in an amount less than about 0.1% by weight of the polymer.
Claim 6
Dependent Claim
12 words
The composition of claim 4 wherein the catalyst is dibutyl tin diacetate.
Claim 7
Dependent Claim
21 words
The composition of claim 5 wherein R is CH 3 , R' is C 3 H 6 and Z is NH.
Claim 8
Dependent Claim
53 words
The composition of claim 6 wherein said composition develops at least 56 lbs/in 2 cleavage strength after 6 hours moisture curing and has a viscosity as indicated by a K value of 450 - 850, and wherein said composition additionally comprises effective amounts of anhydrous carbon black and an asbestos/castor wax rheology modifier.
Claim 9
Dependent Claim
107 words
The process of preparing a rapidly curing sealant composition comprising mixing: a. a silicon terminated vulcanizable polyurethane polymer of the formula ##STR2## wherein R is a lower alkyl radical of from 1 to 6 carbon atoms; wherein R' is a divalent bridging radical selected from the groups consisting of a divalent hydrocarbon radical, a divalent hydrocarbon ether radical, and a divalent hydrocarbon amino radical; and wherein Z is a member selected from the group consisting of --S and --NR", where R" is H or a lower alkyl radical of from 1 to 6 carbon atoms. with b. a small amount of N-beta aminoethyl, gamma aminopropyl trimethoxy silane.
Claim 10
Dependent Claim
107 words
The process of preparing a rapidly curing sealant composition comprising mixing: a. a silicon terminated vulcanizable polyurethane polymer of the formula ##STR2## wherein R is a lower alkyl radical of from 1 to 6 carbon atoms; wherein R' is a divalent bridging radical selected from the groups consisting of a divalent hydrocarbon radical, a divalent hydrocarbon ether radical, and a divalent hydrocarbon amino radical; and wherein Z is a member selected from the group consisting of --S and --NR", where R" is H or a lower alkyl radical of from 1 to 6 carbon atoms. with b. a small amount of N-beta aminoethyl, gamma aminopropyl trimethoxy silane.
Claim 11
Dependent Claim
16 words
The process of claim 8 wherein the small amount is between about 0.5 and about 2.0%.
Claim 12
Dependent Claim
14 words
The process of claim 9, wherein a conventional silanol condensation catalyst is also admixed.
Claim 13
Dependent Claim
26 words
The process of claim 10 wherein said catalyst is admixed in an amount less than about 0.1% by weight, based on the weight of the polymer.
Claim 14
Dependent Claim
12 words
The process of claim 11 wherein the catalyst is dibutyl tin diacetate.
Claim 15
Dependent Claim
21 words
The process of claim 12 wherein R is CH 3 , R' is C 3 H 6 and Z is NH.
References Cited (Backward Citations)
US3632557A
Cited
US3856756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |