US5354724A
Expired / Lapsed
US
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Heat sensitive recording materials with polymer enrobed sensitizer
Assignee: BASF SE
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Filing: 1993-07-29
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Granted: 1994-10-11
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Expires: 2013-07-29
Abstract
Abstract Recording materials which contain one or more optionally polymer-enrobed dye precursors, one or more optionally polymer-enrobed developers and one or more polymer-enrobed sensitizers are described.
Inventors
- 👤 Dietrich Hoffmann
- 👤 Bernhard Schuler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:43
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
Heat-sensitive recording materials comprising one or more optionally polymer encapsulated dye precursors, one or more optionally polymer encapsulated developers and one or more polymer encapsulated sensitizers, wherein said one or more sensitizers are encapsulated separately from said one or more dye precursors and said one or more developers and wherein said sensitizers are monohydric or polyhydric aliphatic C 6 -C 34 -alcohols or mixtures thereof.
Claim 2
Dependent Claim
65 words
Heat-sensitive recording materials comprising one or more optionally polymer encapsulated dye precursors, one or more optionally polymer encapsulated developers and one or more polymer encapsulated sensitizers, wherein said one or more sensitizers are encapsulated separately from said one or more dye precursors and said one or more developers and wherein said sensitizers are monohydric or polyhydric aliphatic C 6 -C 34 -alcohols or mixtures thereof.
Claim 3
Dependent Claim
52 words
Heat-sensitive recording materials as claimed in claim 1, wherein the polymer around the sensitizer consists essentially of a urea/formaldehyde resin, a urea/melamine/formaldehyde resin, a melamine/formaldehyde resin, a polyurethane, a polyurea, a polyamide, a polyester, a polycarbonate, a polystyrene, a styrene/acrylate copolymer, a styrene/methacrylate copolymer, a polyacrylate, a polymethacrylate, gelatin or combinations thereof.
Claim 4
Dependent Claim
30 words
Heat-sensitive recording materials as claimed in claim 1, wherein the polymer around the sensitizer consists essentially of a melamine/formaldehyde resin,a urea/melamine-formaldehyde resin, a urea/formaldehyde resin, a polyacrylate or a polymethacrylate.
Claim 5
Dependent Claim
28 words
Heat-sensitive recording materials as claimed in claim 1, wherein the polymer around the sensitizer was formed in the presence of 2-acrylamidopropanesulfonic acid homopolymers or copolymers as protective colloids.
Claim 6
Dependent Claim
32 words
Heat-sensitive recording materials as claimed in claim 1, wherein the dye precursor has been provided with a first microcapsule comprising a water-soluble, nonionic polymer and a second microcapsule comprising a crosslinked polymer.
Claim 7
Dependent Claim
31 words
Heat-sensitive recording materials as claimed in claim 1, wherein the developer has been provided with a first microcapsule comprising a water-soluble, nonionic polymer and a second microcapsule comprising a crosslinked polymer.
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) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |