Patent US4345053A successfully refreshed from Google Patents.
US4345053A
Expired / Lapsed
US
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Silicon-terminated polyurethane polymer
Assignee: Essex Chemical Corp
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Filing: 1981-07-17
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Granted: 1982-08-17
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Expires: 2001-07-17
Abstract
Abstract What are disclosed are the method of making a moisture-curable silicon terminated organic polymer which comprises reacting a polyurethane prepolymer having terminal active hydrogen atoms with an isocyanato organosilane having at least one hydrolyzable alkoxy group bonded to silicon, silicon terminated organic polymers so produced, and moisture-curable sealant compositions comprising such a silicon terminated polymer.
Inventors
- 👤 Sidky D. Rizk
- 👤 Harry W. S. Hsieh
- 👤 John J. Prendergast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:32
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1021; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/70; C08G18/71; C08G18/718; C09K2003/1034; C09K2003/1056
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
39 words
The method of making a moisture-curable silicon terminated polymer which comprises reacting a polyurethane prepolymer having terminal active hydrogen atoms with an isocyanato organosilane having a terminal isocyanate group and at least one hydrolyzable alkoxy group bonded to silicon.
Claim 2
Independent Claim
39 words
The method of making a moisture-curable silicon terminated polymer which comprises reacting a polyurethane prepolymer having terminal active hydrogen atoms with an isocyanato organosilane having a terminal isocyanate group and at least one hydrolyzable alkoxy group bonded to silicon.
Claim 3
Dependent Claim
21 words
A method as in claim 1 wherein said isocyanato organosilane has from one to three hydrolyzable alkoxy groups bonded to silicon.
Claim 4
Dependent Claim
58 words
A method as in claim 1 wherein said isocyanato organosilane is a compound of the formula OCN--R--Si--(X).sub.m (R').sub.(3-m), wherein R is a divalent organic radical, R' is hydrogen or alkyl having 1 to 4 carbon atoms, X is an hydrolyzable alkoxy group having from 1 to 4 carbon atoms, and m is an integer from 1 to 3.
Claim 5
Dependent Claim
23 words
A method as in claim 1 wherein said isocyanato organosilane having at least one hydrolyzable alkoxy group bonded to silicon is gamma-isocyanatopropyl triethoxysilane.
Claim 6
Dependent Claim
13 words
A moisture-curable silicon terminated organic polymer made by the method of claim 4.
Claim 7
Dependent Claim
18 words
A method as in claim 1 wherein said polyurethane prepolymer has terminal --OH, --SH, or --NH 2 groups.
Claim 8
Dependent Claim
28 words
A method as in claim 1 wherein said polyurethane prepolymer has terminal --OH groups and is prepared by reacting an excess of a polyol with an organic polyisocyanate.
Claim 9
Dependent Claim
13 words
A method as in claim 7 wherein said polyol is a polyether polyol.
Claim 10
Dependent Claim
14 words
A method as in claim 8 wherein said polyether polyol is a polyether diol.
Claim 11
Dependent Claim
14 words
A method as in claim 9 wherein said polyether diol is a polyoxyalkylene diol.
Claim 12
Dependent Claim
21 words
A method as in claim 8 wherein said polyether polyol is a mixture of a polyether diol and a polyether triol.
Claim 13
Dependent Claim
22 words
A method as in claim 11 wherein said polyether diol is a polyoxyalkylene diol and said polyether triol is a polyoxyalkylene triol.
Claim 14
Dependent Claim
42 words
A method as in claim 1 wherein said polyurethane prepolymer has terminal --OH groups and also has urea groups within the polymer chain and is prepared by reacting an excess of a mixture of a polyol and water with an organic polyisocyanate.
Claim 15
Dependent Claim
24 words
A method as in claim 13 wherein up to 25 percent of the total hydroxyl equivalents in said mixture are present in said water.
Claim 16
Dependent Claim
13 words
A method as in claim 7 wherein said polyol is a polyester polyol.
Claim 17
Dependent Claim
14 words
A method as in claim 15 wherein said polyester polyol is a polyester diol.
Claim 18
Dependent Claim
14 words
A method as in claim 16 wherein said polyester diol is a polyalkanolactone diol.
Claim 19
Dependent Claim
14 words
A moisture curable silicon terminated organic polymer made by the method of claim 1.
Claim 20
Dependent Claim
23 words
A moisture-curable sealant composition comprising a moisture curable silicon terminated organic polymer as in claim 18 in combination with at least one filler.
Claim 21
Dependent Claim
19 words
A sealant composition as in claim 19 which additionally comprises a curing catalyst for said silicon terminated organic polymer.
Claim 22
Dependent Claim
15 words
A sealant composition as in claim 20 wherein said catalyst is a quaternary ammonium hydroxide.
Claim 23
Dependent Claim
13 words
A sealant composition as in claim 21 wherein said catalyst is benzyltrimethylammonium hydroxide.
Claim 24
Dependent Claim
23 words
A sealant composition as in claim 19 which additionally comprises an amino organosilane having at least one hydrolyzable alkoxy group bonded to silicon.
Claim 25
Dependent Claim
14 words
A sealant composition as in claim 23 wherein said amino organosilane is N-(beta-aminoethyl)-gamma-aminopropyltrimethoxy silane.
Claim 26
Dependent Claim
15 words
A sealant composition as in claim 23 wherein said amino organosilane is N-(beta-aminoethyl),N'-(gamma-trimethoxysilyl propyl)-ethylene diamine.
References Cited (Backward Citations)
US2759007A
Cited
US3208972A
Cited
US3632557A
Cited
US3494951A
Cited
US3821218A
Cited
US3627722A
Cited
US3703499A
Cited
US3886226A
Cited
US3979344A
Cited
US4146585A
Cited
US4222925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |