US4020218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysulfide sealant and caulk compositions
Assignee: OSI Specialties Inc
•
Filing: 1975-03-27
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Granted: 1977-04-26
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Expires: 1995-03-27
Abstract
Abstract This invention relates to enchancing the bonding of polysulfide sealants to a variety of inorganic substrates, most particularly, to metal, ceramic, concrete, and glass substrates. This improved bonding of sealant is achieved by the use of a silane adhesion promoter which is characterized by the following formula:
Inventors
- 👤 Maurice W. Ranney
- 👤 Robert J. Pickwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
The process for enhancing the bonding of polysulfide sealant or caulks to solid inorganic substrates which comprises providing at the interface of the substrate and the sealant or caulk a silane or its hydrolyzate or condensate of the formula R -- SiX.sub.3 wherein R is a bicyclopentenyl or mercaptonorbornyl containing radical, and X is a hydrolyzable group comprised of chlorine, alkoxy or acetoxy radicals.
Claim 2
Dependent Claim
64 words
The process for enhancing the bonding of polysulfide sealant or caulks to solid inorganic substrates which comprises providing at the interface of the substrate and the sealant or caulk a silane or its hydrolyzate or condensate of the formula R -- SiX.sub.3 wherein R is a bicyclopentenyl or mercaptonorbornyl containing radical, and X is a hydrolyzable group comprised of chlorine, alkoxy or acetoxy radicals.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein R is a bicyclopentenyl containing radical.
Claim 4
Dependent Claim
35 words
The process of claim 2 wherein the silane has the formula ##STR7## in which R' is ##STR8## X is a hydrolyzable group comprised of chlorine, alkoxy or acetoxy radicals, and a is 0 or 1.
Claim 5
Dependent Claim
8 words
The product of the process of claim 2.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein R is a mercaptonorbornyl containing radical.
Claim 7
Dependent Claim
61 words
The process of claim 5 wherein the silane has the formula (HS).sub.b -R"-SiX.sub.3 in which b is 1 or 2, X is as defined, R" is one of the polyvalent cycloaliphatic hydrocarbon radicals of the formula ##STR9## and when b is two, the two mercapto groups are attached to separate carbon atoms and such carbon atoms are adjacent to one another.
Claim 8
Dependent Claim
8 words
The product of the process of claim 5.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |