Patent US4256788A successfully refreshed from Google Patents.
US4256788A
Expired / Lapsed
US
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Process for the coating of glass surfaces
Assignee: Huels AG
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Filing: 1978-09-29
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Granted: 1981-03-17
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Expires: 1998-09-29
Abstract
Abstract A process for the coating of glass surfaces with a transparent, duroplastic protective layer of more than 50 microns which comprises first treating the clean glass surface with an aqueous or alcoholic silane skim coat, drying the treated surface and then coating the dry surface with a paste of aliphatic or cycloaliphatic diisocyanates or mixtures thereof or the reaction products with water in the mole ratio of 2:≦1 and a mixture of hydroxy-group-containing compounds consisting of 40-80 wt. %, trifunctional, hydroxy-group-containing polyester polyols made of aliphatic or cycloaliphatic dicarboxylic acids or mixtures thereof and a mixture of triols, diols or tricarboxylic acids, with an average molecular weight of 300 to 1400, 15-50 wt. % bifunctional, hydroxy-group-containing polyester polyols from aliphatic or cycloaliphatic dicarboxylic acids or mixtures thereof and diols, with an average molecular weight of 400 to 2000 and, if necessary, 2.5-25 wt. % aliphatic or cycloaliphatic diols or mixtures thereof, with respect to the total quantity of polyols, and optionally hardening the coated surface with further added heat.
Inventors
- 👤 Rainer Gras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:57
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6633; B; B65; B65D; B65D23/00; B65D23/08; B65D23/0807; B65D23/0814; C03; C03C; C03C17/00; C03C17/28; C03C17/32; C03C17/322; Y; Y10; Y10S; Y10S215/00; Y10S215/06; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317; Y10T428/1321; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31536; Y10T428/31551; Y10T428/31598; Y10T428/31609; Y10T428/31612
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
167 words
A process for the coating of glass surfaces to prevent the strewing of glass particles in case of bursting, with a transparent, duroplastic protective layer of more than 50 microns which comprises first treating the clean glass surface with an aqueous or alcoholic silane skim coat, drying said treated surface, and then coating said dry surface with a paste of aliphatic or cycloaliphatic diisocyanates or mixtures thereof or their reaction products with water in a mole ratio of 2:≦1 and a mixture of hydroxyl-group-containing compounds consisting of 4- 80wt.% trifunctional, hydroxyl-group-containing polyester polyols made of aliphatic or cycloaliphatic dicarboxylic acids or mixtures thereof and a mixture of triols, diols or tricarboxylic acids, with an average molecular weight of 300 to 1400, 15-50 wt.% bifunctional, hydroxy-group-containing polyester polyols from aliphatic or cyloaliphatic dicarboxylic acids or mixtures thereof and diols, with an average molecular weight of 400 to 2000 and, if necessary 2.5-25 wt.% aliphatic or cycloaliphatic diols or mixtures thereof, with respect to the total quantity of polyols.
Claim 2
Dependent Claim
167 words
A process for the coating of glass surfaces to prevent the strewing of glass particles in case of bursting, with a transparent, duroplastic protective layer of more than 50 microns which comprises first treating the clean glass surface with an aqueous or alcoholic silane skim coat, drying said treated surface, and then coating said dry surface with a paste of aliphatic or cycloaliphatic diisocyanates or mixtures thereof or their reaction products with water in a mole ratio of 2:≦1 and a mixture of hydroxyl-group-containing compounds consisting of 4- 80wt.% trifunctional, hydroxyl-group-containing polyester polyols made of aliphatic or cycloaliphatic dicarboxylic acids or mixtures thereof and a mixture of triols, diols or tricarboxylic acids, with an average molecular weight of 300 to 1400, 15-50 wt.% bifunctional, hydroxy-group-containing polyester polyols from aliphatic or cyloaliphatic dicarboxylic acids or mixtures thereof and diols, with an average molecular weight of 400 to 2000 and, if necessary 2.5-25 wt.% aliphatic or cycloaliphatic diols or mixtures thereof, with respect to the total quantity of polyols.
Claim 3
Dependent Claim
22 words
A process according to claim 1, wherein the trifunctional, hydroxyl-group containing polyester polyol has an average molecular weight of 500 to 800.
Claim 4
Dependent Claim
23 words
A process according to claim 1 or 2, wherein the bifunctional, hydroxyl-group-containing polyesterpolyol has an average molecular weight of 500 to 1 200.
Claim 5
Dependent Claim
30 words
A process according to claim 1, wherein polyesterpolyols and diols as well as polyisocyanates are used in such quantities that there are 0.8 to 1.2 isocyanate groups for one OH-group.
Claim 6
Dependent Claim
15 words
A process according to claim 4, wherein there are 0.95-1.1 isocyanate groups for one OH-group.
Claim 7
Dependent Claim
21 words
A process according to claim 1, wherein a prepolymer from the polyisocyanates and aliphatic diols is first prepared and then used.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein said glass surfaces are glass bottles.
Claim 9
Dependent Claim
14 words
Coated glass bottles with a transparent, duroplastic protected layer, manufactured according to claim 7.
Claim 10
Dependent Claim
18 words
The process of claim 1 wherein said trifunctional hydroxy-group-containing polyester polyol is present in an amount of 50-75%.
Claim 11
Dependent Claim
18 words
The process of claim 1 wherein said bifunctional hydroxy-group-containing polyester polyol is present in an amount of 20-40%.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein said mixture of hydroxy-group-containing compounds contains 2.5-25% by weight of aliphatic or cycloaliphatic diols or mixtures thereof.
Claim 13
Dependent Claim
15 words
The process of claim 11 wherein said diols are present in an amount of 5-15%.
Claim 14
Dependent Claim
14 words
The process of claim 1 wherein said coated surface is hardened by further heating.
Claim 15
Dependent Claim
25 words
A process according to claim 13, wherein the coated glass surfaces are subjected to the hardening at a temperature in the range of 150°-240° C.
Claim 16
Dependent Claim
20 words
A process according to claim 14, wherein the hardening is carried out at temperatures in the range of 180°-210° C.
Claim 17
Dependent Claim
32 words
The process of claim 1 wherein said silane has at least two functionally correlated groups, one of which will react with said glass surface and the other will react with isocyanate groups.
Claim 18
Dependent Claim
16 words
The process of claim 1 wherein said coating paste contains 0.05-0.5 wt.% of a flowing agent.
Claim 19
Dependent Claim
14 words
Coated glass surfaces with a transparent, duroplastic protective layer, manufactured according to claim 1.
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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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |