US4877828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-bonding silicone caulking compositions
Assignee: General Electric Co
•
Filing: 1988-05-31
•
Granted: 1989-10-31
•
Expires: 2008-05-31
Abstract
Abstract Certain bissilyl ureas have been found useful as adhesion promoters for silicone latex compositions. Self-bonding silicone elastomers are provided which exhibit enhanced adhesion to a variety of substrates.
Inventors
- 👤 Judith Stein
- 👤 Tracey M. Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/544; C08K5/5455
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
Silicone caulking composition comprising (A) a base formulation having 40 to 60% solids comprising a silanol terminated polydimethylsiloxane having a molecular weight of about 5000 to 15,000 stabilized with nonionic surfactant and having a pH in the range of 4 to 6, (B) a calcium carbonate filler, (C) a trialkoxy silane, (D) a tin catalyst and (E) a bissilyl urea having the formula ##STR3## where the bissilyl urea is present in the silicone caulking composition at from 0.1 to 5 parts per 100 parts of the base formulation, R, R 1 and R 2 are selected from the same or different C.sub.(1-8) alkyl radicals, and R 4 and R 5 are selected from the same or different C.sub.(2-4) divalent alkylene radicals.
Claim 2
Dependent Claim
121 words
Silicone caulking composition comprising (A) a base formulation having 40 to 60% solids comprising a silanol terminated polydimethylsiloxane having a molecular weight of about 5000 to 15,000 stabilized with nonionic surfactant and having a pH in the range of 4 to 6, (B) a calcium carbonate filler, (C) a trialkoxy silane, (D) a tin catalyst and (E) a bissilyl urea having the formula ##STR3## where the bissilyl urea is present in the silicone caulking composition at from 0.1 to 5 parts per 100 parts of the base formulation, R, R 1 and R 2 are selected from the same or different C.sub.(1-8) alkyl radicals, and R 4 and R 5 are selected from the same or different C.sub.(2-4) divalent alkylene radicals.
Claim 3
Dependent Claim
28 words
A silicone caulking composition in accordance with claim 1, where the bissilyl urea is the reaction product of substance under equal molar amounts of aminobutyldimethylmethoxy silane and isocyanatopropyltrimethoxysilane.
Claim 4
Dependent Claim
27 words
A silicone caulking composition in accordance with claim 1, where the tin catalyst is Cl(C 4 H 7 ) 2 SnOSn(C 4 H 7 ) 2 OH.
References Cited (Backward Citations)
US2891920A
Cited
US3294725A
Cited
US3355406A
Cited
US3664997A
Cited
US4100124A
Cited
US4221688A
Cited
US4277382A
Cited
US4506058A
Cited
US4735979A
Cited
US4587288A
Cited
US4618642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |