US4171222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-component diazotype material
Assignee: Morton International LLC
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Filing: 1977-11-21
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Granted: 1979-10-16
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Expires: 1997-11-21
Abstract
Abstract This invention relates to an improvement in a two-component diazotype material comprising a film support and a light-sensitive layer thereon, the light-sensitive layer being composed of at least one polymeric hydrophobic binder, a light-sensitive diazonium salt and a coupler, the improvement that the light-sensitive layer additionally contains at least one resin containing acid groups, which resin has an acid number of at least about 100 and which is derived from the maleic acid or phthalic acid type.
Inventors
- 👤 Hans-Dieter Frommeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:55
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
In a two-component diazotype material comprising a film support and a light-sensitive layer thereon, the light-sensitive layer being composed of at least one polymeric hydrophobic binder, a light-sensitive diazonium salt, and a coupler for the diazonium salt, the improvement that the light-sensitive layer additionally contains at least one resin, containing acid groups, which resin has an acid number of at least about 100, is derived from the maleic acid or phthalic acid type, and is present in a concentration of about 5 to 30 percent by weight, relative to the hydrophobic binder used.
Claim 2
Dependent Claim
93 words
In a two-component diazotype material comprising a film support and a light-sensitive layer thereon, the light-sensitive layer being composed of at least one polymeric hydrophobic binder, a light-sensitive diazonium salt, and a coupler for the diazonium salt, the improvement that the light-sensitive layer additionally contains at least one resin, containing acid groups, which resin has an acid number of at least about 100, is derived from the maleic acid or phthalic acid type, and is present in a concentration of about 5 to 30 percent by weight, relative to the hydrophobic binder used.
Claim 3
Dependent Claim
22 words
A material in accordance with claim 1, in which the resin containing acid groups has an acid number of at least 200.
Claim 4
Dependent Claim
28 words
A material in accordance with claim 1, in which the resin containing acid groups is a copolymer of maleic anhydride with styrene, ethylene or an alkyl vinyl ether.
Claim 5
Dependent Claim
23 words
A material in accordance with claim 1, in which the resin containing acid groups is an acid alkyd resin based on phthalic anhydride.
Claim 6
Dependent Claim
32 words
A material in accordance with claim 1, in which a cellulose ester is used as a hydrophobic binder and a copolymer of maleic anhydride is used as a resin containing acid groups.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |