US4268554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the coating of glass surfaces
Assignee: Huels AG
•
Filing: 1978-09-29
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Granted: 1981-05-19
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Expires: 1998-09-29
Abstract
Abstract 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 the treated surface, and then coating the dry surface with a mass 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 comprising 40-80 wt. % trifunctional, hydroxy-group-containing polyesters made of ω-hydroxy-carboxylic acids or their lactones with at least four C-atoms, with an average molecular weight of 300 to 1400, 15-50 wt. % bifunctional, hydroxy-group-containing polyesters made of ω-hydroxy-carboxylic acids or thier lactones with a least 4 C-atoms with an average molecular weight of 400 to 2000 and 2.5-20 wt. % aliphatic or cycloaliphatic diols or mixtures thereof, with respect to the total quantity of the polyols, an optionally hardening the coated surfaces with additional heat.
Inventors
- 👤 Rainer Gras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:17
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8012; C08G18/8016; B; B65; B65D; B65D23/00; B65D23/08; B65D23/0807; B65D23/0814; C03; C03C; C03C17/00; C03C17/28; C03C17/32; C03C17/322; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/65; C08G18/66; C08G18/6633; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/753; C08G18/755; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317; Y10T428/1321; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601; Y10T428/31609; Y10T428/31612; Y10T428/31616; Y10T428/3162; Y10T428/31652; Y10T428/31663; Y10T428/31786; Y10T428/31794
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
169 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 mass 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 hydroxy-group-containing compounds comprising 4- 80wt.% trifunctional, hydroxy group-containing polyesters made of ω-hydroxy-carboxylic acids or their lactones with at least 4 C-atoms with an average molecular weight of 300 to 1400, 15-50 wt.% bifunctional, hydroxy group-containing polyesters made of ω-hydroxy carboxylic acids or their lactones with at least 4 C-atoms with an average molecular weight of 400 to 2000 and 2.5-20 wt.% aliphatic or cycloaliphatic diols, or mixtures thereof with respect to the total quantity of the polyols, and optionally hardening said coated surface with additional heat.
Claim 2
Dependent Claim
169 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 mass 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 hydroxy-group-containing compounds comprising 4- 80wt.% trifunctional, hydroxy group-containing polyesters made of ω-hydroxy-carboxylic acids or their lactones with at least 4 C-atoms with an average molecular weight of 300 to 1400, 15-50 wt.% bifunctional, hydroxy group-containing polyesters made of ω-hydroxy carboxylic acids or their lactones with at least 4 C-atoms with an average molecular weight of 400 to 2000 and 2.5-20 wt.% aliphatic or cycloaliphatic diols, or mixtures thereof with respect to the total quantity of the polyols, and optionally hardening said coated surface with additional heat.
Claim 3
Dependent Claim
20 words
A process according to claim 1, wherein the trifunctional, hydroxyl-group-containing polyester has an average molecular weight of 500 to 800.
Claim 4
Dependent Claim
23 words
A process according to claims 1 or 2, wherein the bifunctional, hydroxyl-group-containing polyester has an average molecular weight of 500 to 1 200.
Claim 5
Dependent Claim
30 words
A process according to claim 1, wherein polyester diols and diols as well as polyisocyanates are used in such quantities that there are 0.8 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
23 words
A process according to the claim 1, wherein a prepolymer is first made from the polyisocyanates and aliphatic diols and is then used.
Claim 8
Dependent Claim
24 words
A process according to claim 14, wherein the coated glass surfaces are subjected to hardening at a temperature in the range of 150°-240° C.
Claim 9
Dependent Claim
20 words
A process according to claim 7, wherein the hardening is carried out at temperatures in the range of 180°-210° C.
Claim 10
Dependent Claim
12 words
The process of claim 1 wherein said glass surfaces are glass bottles.
Claim 11
Dependent Claim
14 words
Coated glass bottles with a transparent, duroplastic protective layer, prepared according to claim 9.
Claim 12
Dependent Claim
19 words
The process of claim 1 wherein said trifunctional hydroxy-group-containing polyesters are present in an amount of 50-75% by weight.
Claim 13
Dependent Claim
19 words
The process of claim 1 wherein said bifunctional hydroxy-group-containing polyester are present in an amount of 20-40% by weight.
Claim 14
Dependent Claim
19 words
The process of claim 1 wherein said aliphatic or cycloaliphatic diols are present in an amount of 5-15 wt.%.
Claim 15
Dependent Claim
14 words
The process of claim 1 wherein said coated surface is hardened by further heating.
Claim 16
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 a glass surface and the other will react with isocyanate groups.
Claim 17
Dependent Claim
17 words
The process of claim 1 wherein said coating mass contains 0.05-0.5% by weight of a flowing agent.
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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) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |