US4289535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sensitive coating
Assignee: Labelon Corp
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Filing: 1980-03-14
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Granted: 1981-09-15
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Expires: 2000-03-14
Abstract
Abstract A heat-sensitive coating composition for a thermo-responsive printing or recording record material for thermal printing devices comprising a color-forming amount of a finely divided solid chromogenous basic 3, 3-bisarylphthalane derivative, and a color-developing amount of a finely divided solid phenol derivative which at thermal printing temperature is at least partially fluidizable and capable of a color-forming reaction with the chromogenous 3,3-bisarylphthalane derivative distributed in a carrier composition comprising a substantially water soluble anionic polysaccharide gum and a stability enhancing amount of sucrose benzoate.
Inventors
- 👤 Barry L. Marginean
- 👤 Warren A. Hookway, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:20
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/333
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
83 words
A heat-sensitive coating composition for a thermo-responsive printing or recording record material for thermal printing devices which comprises: a color-forming amount of a finely divided solid chromogenous basic 3,3-bisarylphthalane derivative, and a color-developing amount of a finely divided solid phenol derivative which at thermal printing temperature is at least partially fluidizable and capable of a color-forming reaction with the chromogenous 3,3-bisarylphthalane derivative distributed in a carrier composition comprising a substantially water soluble anionic polysaccharide gum and a stability enhancing amount of sucrose benzoate.
Claim 2
Dependent Claim
83 words
A heat-sensitive coating composition for a thermo-responsive printing or recording record material for thermal printing devices which comprises: a color-forming amount of a finely divided solid chromogenous basic 3,3-bisarylphthalane derivative, and a color-developing amount of a finely divided solid phenol derivative which at thermal printing temperature is at least partially fluidizable and capable of a color-forming reaction with the chromogenous 3,3-bisarylphthalane derivative distributed in a carrier composition comprising a substantially water soluble anionic polysaccharide gum and a stability enhancing amount of sucrose benzoate.
Claim 3
Dependent Claim
44 words
The heat-sensitive coating composition as defined in claim 1 wherein the carrier composition further comprises a filler selected from the group consisting of di(lower alkyl)dithiocarbamates and lower alkylxanthates of lead, zinc, cadmium and alkaline earth metals and tetra(lower alkyl) thiuram disulfides and di(lower alkyl)xanthogens.
Claim 4
Dependent Claim
31 words
The heat-sensitive coating composition as defined in claim 1 wherein the carrier composition further comprises a high molecular polymer selected from the group consisting of micronized polyolefins and micronized modified polyolefins.
Claim 5
Dependent Claim
16 words
The heat-sensitive coating composition as defined in claim 1 wherein the polysaccharide gum is gum arabic.
Claim 6
Dependent Claim
15 words
The heat-sensitive coating composition as defined in claim 2 wherein the filler is zinc di-n-butyldithiocarbamate.
Claim 7
Dependent Claim
34 words
The heat-sensitive coating composition as defined in claim 4 which comprises between about 16 and about 50% by weight of gum arabic and between about 3 and about 10% by weight of sucrose benzoate.
Claim 8
Dependent Claim
53 words
The heat-sensitive coating composition as defined in claim 6 which further comprises between about 2 and about 12% by weight of zinc di-n-butyldithiocarbamate and between about 2 and about 12% by weight of micronized polyolefin or micronized modified polyolefin with a molecular weight from about 1,500-2,000 and melting point from about 240°-700° F.
Claim 9
Dependent Claim
35 words
The heat-sensitive coating composition as defined in claim 7 which comprises between about 9 and about 30% by weight of the chromogenous 3,3-bisarylphthalane derivative and from about 16 to about 36% of the phenol derivative.
Claim 10
Dependent Claim
30 words
The heat-sensitive coating composition as defined in claims 1, 2, 3, 4, 5, 6, 7, or 8 wherein the chromogenous 3,3-bisarylphthalane derivative is 6-dimethylamino-3,3-bis(p-dimethylaminophenyl)phthalide and the phenol derivative is 4,4'-isopropylidenediphenol.
Claim 11
Dependent Claim
57 words
The heat-sensitive coating composition as defined in claim 9 which comprises between about 10 and about 15% of 6-dimethylamino-3,3-bis(p-dimethylaminophenyl)phthalide, between about 30 and 35% of gum arabic, between about 5 and about 8% of sucrose benzoate, between about 5 and about 10% of zinc di-n-butyldithiocarbamate and between about 5 and about 10% of the high molecular polymer.
Claim 12
Dependent Claim
79 words
A composition for preparing heat-sensitive coating for thermo-responsive record material for thermal printing devices which comprises a chromogenous mixture comprising a color-forming amount of a finely divided solid basic 3,3-bisarylphthalane derivative, gum arabic, a stability enhancing amount of sucrose benzoate, and a separate color-developer mixture comprising a color-developing amount of a finely divided solid phenol derivative which at thermal printing temperature is at least partially fluidizable and capable of a color-forming reaction with the chromogenic 3,3-bisarylphthalane and gum arabic.
Claim 13
Dependent Claim
79 words
A composition for preparing heat-sensitive coating for thermo-responsive record material for thermal printing devices which comprises a chromogenous mixture comprising a color-forming amount of a finely divided solid basic 3,3-bisarylphthalane derivative, gum arabic, a stability enhancing amount of sucrose benzoate, and a separate color-developer mixture comprising a color-developing amount of a finely divided solid phenol derivative which at thermal printing temperature is at least partially fluidizable and capable of a color-forming reaction with the chromogenic 3,3-bisarylphthalane and gum arabic.
Claim 14
Dependent Claim
30 words
The composition as defined in claim 11 wherein the chromogenous mixture further comprises zinc di-n-butyldithiocarbamate and a high molecular polymer selected from the group consisting of polyethylenes and fluorinated polyethylenes.
Claim 15
Dependent Claim
30 words
A heat-sensitive record sheet for thermal printing devices which comprises a support sheet which carries on at least one of its surfaces the coating composition as defined in claim 1.
References Cited (Backward Citations)
US4168845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |