Patent US4154638A successfully refreshed from Google Patents.
US4154638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling agent for bonding an organic polymer to an inorganic surface
Assignee: PPG Industries Inc
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Filing: 1977-08-04
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Granted: 1979-05-15
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Expires: 1997-08-04
Abstract
Abstract A coupling agent for bonding an organic polymer to an inorganic coating on glass is prepared by the stoichiometric conversion of silicon-functional terminal groups in a multifunctional silane primer into tin-functional terminal groups which have a high affinity for inorganic surfaces such as tin oxide or indium oxide films on glass.
Inventors
- 👤 Helmut Franz
- 👤 James C. Vanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:14
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10018; B32B17/10165; B32B17/10174; B32B17/1022; B32B17/1055; B32B17/10688; B32B17/1077; B32B27/00; B32B27/40; C; C08; C08J; C08J5/00; C08J5/12; B32B2264/00; B32B2264/10; B32B2264/102; C08J2375/00; C08J2375/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31605
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
50 words
In a method for laminating polyurethane to a surface of a glass sheet, said surface being coated with a metal-containing film, the improvement which comprises employing, at the interface of the polyurethane and coated glass, a coupling agent prepared by the reaction of an amino-functional silane and an organotin compound.
Claim 2
Dependent Claim
50 words
In a method for laminating polyurethane to a surface of a glass sheet, said surface being coated with a metal-containing film, the improvement which comprises employing, at the interface of the polyurethane and coated glass, a coupling agent prepared by the reaction of an amino-functional silane and an organotin compound.
Claim 3
Dependent Claim
23 words
The improved method according to claim 1, wherein the metal-containing film is selected from the group consisting of tin oxide and indium oxide.
Claim 4
Dependent Claim
27 words
The improved method according to claim 1, wherein the amino-functional silane is selected from the group consisting of N-beta (aminoethyl) gamma aminopropyl trimethoxysilane and gamma aminopropyl triethoxysilane.
Claim 5
Dependent Claim
16 words
The improved method according to claim 1, wherein the organometal compound is an alkyl metal carboxylate.
Claim 6
Dependent Claim
32 words
The improved method according to claim 4, wherein the alkyl metal carboxylate is dibutyl tin diacetate and the metal-containing film is selected from the group consisting of tin oxide and indium oxide.
Claim 7
Dependent Claim
34 words
The improved method according to claim 1, wherein the coupling agent is prepared by the reaction of an amino trialkoxy silane with dibutyl tin diacetate in a molar ratio of from 1:1 to 1:3.
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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) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |