US4093759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass container coated with polyurethane
Assignee: Artience Co Ltd
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Filing: 1976-02-17
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Granted: 1978-06-06
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Expires: 1996-02-17
Abstract
Abstract A process for preventing the scattering of glass fragments in the event of the bursting of a glass container such as a bottle, which comprises coating the surface of the glass container with a resin composition in a thickness of at least 100 microns, said composition comprising a dispersion of (A) a powder with a particle diameter of about 1 to 100 microns of a solid compound capable of reaction with (B) upon heating to form a higher molecular weight cured product, in (B) a normally liquid urethane prepolymer having a molecular weight of at least 400 per isocyanato group, and being capable of forming a film having a tensile strength of at least 300 kg/cm 2 and a percent elongation of at least 200%.
Inventors
- 👤 Akira Otsuki
- 👤 Michihisa Naito
- 👤 Yukifumi Mashimo
- 👤 Akira Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:56
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/28; C03C17/32; C03C17/322; B; B65; B65D; B65D23/00; B65D23/08; B65D23/0807; B65D23/0814; Y; Y10; Y10S; Y10S215/00; Y10S215/06; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317; Y10T428/1321; Y10T428/25; Y10T428/254; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
A glass container carrying on the surface thereof a single layer coating of a transparent non-tacky film in a thickness of at least 100 microns and having a tensile strength of at least 300 kg/cm 2 and a percent elongation of at least 200%, said film being a cured high molecular weight compound formed by the reaction of a powder having a particle diameter of about 1 to 100 microns of a solid compound having a melting point of more than 20° C. selected from the group consisting of melamine, benzoguanamine, and acetoguanamine with 0.9 to 1.5 equivalents per equivalent of said powder of a urethane prepolymer which is normally liquid and has at least 2 isocyanate groups and has a molecular weight of at least 400 per isocyanate group, said coating having been cured at a temperature of 180° to 200° C.
Claim 2
Dependent Claim
143 words
A glass container carrying on the surface thereof a single layer coating of a transparent non-tacky film in a thickness of at least 100 microns and having a tensile strength of at least 300 kg/cm 2 and a percent elongation of at least 200%, said film being a cured high molecular weight compound formed by the reaction of a powder having a particle diameter of about 1 to 100 microns of a solid compound having a melting point of more than 20° C. selected from the group consisting of melamine, benzoguanamine, and acetoguanamine with 0.9 to 1.5 equivalents per equivalent of said powder of a urethane prepolymer which is normally liquid and has at least 2 isocyanate groups and has a molecular weight of at least 400 per isocyanate group, said coating having been cured at a temperature of 180° to 200° C.
Claim 3
Dependent Claim
68 words
The container of claim 1 wherein said urethane prepolymer is a reaction product of 1 equivalent of a polyol selected from the group consisting of polypropylene glycol, polyethylene glycol adipate, polybutylene glycol adipate, polytetramethylene glycol, a polyester-polyol, trimethylolpropane, 1,4-butylene glycol, trimethylhexanediol, and 2,2,4-trimethyl-1,3-pentanediol, and 2 equivalents of a diisocyanate selected from the group consisting of tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, 4,4-diphenylmethane diisocyanate, xylylene diisocyanate and naphthalene diisocyanate.
Claim 4
Dependent Claim
26 words
The container of claim 1 wherein said normally solid compound is a powder of melamine or benzoguanamine having a particle diameter of 3 to 10 microns.
Claim 5
Dependent Claim
20 words
The container of claim 1 wherein the ratio between said urethane prepolymer and said solid compound is an equivalent ratio.
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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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |