Patent US20120021646A1 successfully refreshed from Google Patents.
US4015044A
Expired / Lapsed
US
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Process of bonding polyurethane-sealants and caulks
Assignee: OSI Specialties Inc
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Filing: 1975-03-27
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Granted: 1977-03-29
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Expires: 1995-03-27
Abstract
Abstract This invention involves a new class of silane adhesion promoters for the bonding of polyurethane sealants to a variety of substrates. These silane adhesion promoters are bis-trialkoxysilylorgano polysulfide compounds.
Inventors
- 👤 Maurice W. Ranney
- 👤 Robert J. Pickwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:45
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; C09D183/08; C09J; C09J5/00; C09J5/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31533; Y10T428/31551; Y10T428/31598; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
The process of enhancing the bonding of polyurethane sealants and caulk compositions to solid inorganic surfaces which comprises providing at the interface of the caulk or sealant composition and said surface a silane, or the hydrolyzate or condensate of silane, having the formula: (S.sub.n).sub.a [R - SiX.sub.3 ].sub.b wherein n is a number ranging from about 2 to about 6, a is a number equal to one-half the free valence of R, b is a number equal to at least 2, R is a divalent organic radical joined at one end to sulphur and at the other end to silicon, and X is a hydrolyzable group comprised of halogen, alkoxy or acyloxy radicals.
Claim 2
Dependent Claim
113 words
The process of enhancing the bonding of polyurethane sealants and caulk compositions to solid inorganic surfaces which comprises providing at the interface of the caulk or sealant composition and said surface a silane, or the hydrolyzate or condensate of silane, having the formula: (S.sub.n).sub.a [R - SiX.sub.3 ].sub.b wherein n is a number ranging from about 2 to about 6, a is a number equal to one-half the free valence of R, b is a number equal to at least 2, R is a divalent organic radical joined at one end to sulphur and at the other end to silicon, and X is a hydrolyzable group comprised of halogen, alkoxy or acyloxy radicals.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein R in the silane is alkylene.
Claim 4
Dependent Claim
167 words
The process of claim 1 wherein the silane has the formula: ##STR21## wherein X represents a hydrolyzable group such as halogen, alkoxy and acyloxy radicals; R' represents an alkyl radical containing from 1 to 4 carbon atoms; y has a value of from 0 to 2 inclusive; R o represents a divalent bridging group such as alkylene and alkyleneoxy radicals containing from 1 to 7 carbon atoms; n has a value of 0 to 1; Ar represents an aryl radical containing, e.g., from 6 to 12 carbon atoms; (S) x represents a divalent polysulfide radical each free valence of which is directly bonded to an aromatic carbon atom of an Ar radical whereby each Ar radical is bonded to another Ar radical through a (S) x radical; x has a value of from 2 to 6; a' has a value of at least 2; b' has a value of at least 1; and the ratio of a' to b' is a value of not more than 2.
Claim 5
Dependent Claim
11 words
The process of claim 2 wherein the silane is bis-(gamma-trimethoxysilylpropyl) disulfide.
Claim 6
Dependent Claim
11 words
The process of claim 2 wherein the silane is bis-(gamma-trimethoxysilylpropyl) trisulfide.
Claim 7
Dependent Claim
11 words
The process of claim 2 wherein the silane is bis-(gamma-trimethoxysilylpropyl) tetrasulfide.
Claim 8
Dependent Claim
11 words
The process of claim 3 wherein the silane is bis-(4-trimethoxysilyltolyl) trisulfide.
Claim 9
Dependent Claim
8 words
The product of the process of claim 1.
Claim 10
Dependent Claim
8 words
The product of the process of claim 2.
Claim 11
Dependent Claim
8 words
The product of the process of claim 3.
References Cited (Backward Citations)
US3246671A
Cited
US3476826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |