US4870047A
Expired / Lapsed
US
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Thermally-responsive record material
Assignee: Appvion LLC
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Filing: 1988-09-01
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Granted: 1989-09-26
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Expires: 2008-09-01
Abstract
Abstract A novel thermally-responsive record material is disclosed which is resistant to image fade from one or more common external challenges including contact with common fats or oils, skin oil, carbonless solvents, plasticizers or high heat and humidity, such as in a 90°F./90% humidity test. The heat-sensitive material of the invention contains a fade resistance imparting ascorbic acid ester of the formula ##STR1## where R 1 is hydrogen or a straight chain or branched chain acyl group of from 9 to 22 carbons inclusive, wherein R 2 is a straight chain or branched chain alkyl group of from 8 to 21 carbons inclusive.
Inventors
- 👤 Kenneth D. Glanz
- 👤 Gerald C. Bartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:25
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
95 words
A thermally-responsive record material comprising a support member bearing a thermally-sensitive color-forming composition comprising a chromogenic material and an acidic developer material in proximate relationship, whereby the melting, softening or sublimation of either material produces a change in color by reaction between the two, and an ascorbic acid ester of the formula ##STR6## wherein R 1 is selected from hydrogen or a straight chain or branched chain acyl group of from 9 to 22 carbons inclusive, wherein R 2 is a straight chain or branched chain alkyl group of from 8 to 21 carbons inclusive.
Claim 2
Dependent Claim
95 words
A thermally-responsive record material comprising a support member bearing a thermally-sensitive color-forming composition comprising a chromogenic material and an acidic developer material in proximate relationship, whereby the melting, softening or sublimation of either material produces a change in color by reaction between the two, and an ascorbic acid ester of the formula ##STR6## wherein R 1 is selected from hydrogen or a straight chain or branched chain acyl group of from 9 to 22 carbons inclusive, wherein R 2 is a straight chain or branched chain alkyl group of from 8 to 21 carbons inclusive.
Claim 3
Dependent Claim
18 words
The thermally-responsive record material according to claim 1, wherein, in the ascorbic acid ester, R 1 is hydrogen.
Claim 4
Dependent Claim
31 words
The record material according to claim 1 wherein the ascorbic acid ester is selected from the group consisting of ascorbic acid-6-palmitate, ascorbic acid-6-stearate, ascorbic acid-6-laurate, iso ascorbic acid-6-laurate, and ascorbic acid-2,6-dipalmitate.
Claim 5
Dependent Claim
15 words
The record material according to claim 1 wherein the ascorbic acid ester is ascobic acid-6-palmitate.
Claim 6
Dependent Claim
16 words
The record material according to claim 1 wherein the ascorbic acid ester is iso ascorbic acid-6-laurate.
Claim 7
Dependent Claim
15 words
The record material according to claim 1 wherein the ascorbic acid ester is ascorbic acid-6-stearate.
Claim 8
Dependent Claim
15 words
The record material according to claim 1 wherein the ascorbic acid ester is ascorbic acid-2,6-dipalmitate.
Claim 9
Dependent Claim
11 words
The record material of claim 1 comprising in addition a binder.
Claim 10
Dependent Claim
16 words
The record material of claim 1 in which the acidic developer material is a phenol compound.
Claim 11
Dependent Claim
36 words
The record material of claim 9 in which the phenol compound is selected from the group consisting of 4,4'-isopropylindinediphenol, ethyl-4,4-bis(4-hydroxyphenyl)-pentanoate, n-propyl-4,4-bis(4-hydroxyphenyl)pentanoate, isopropyl-4,4-bis(4-hydroxyphenyl)pentanoate, methyl-4,4-bis(4-hydroxyphenyl)-pentanoate, bis(3-allyl-4-hydroxyphenylsulfone), allyl-4,4-bis(hydroxyphenyl)pentanoate, 2,2-bis(4-hydroxyphenyl)-4-methylpentane, p-hydroxybenzophenone, 2,4-dihydroxybenzophenone, 1,1-bis(4-hydroxyphenyl)cyclohexane, 2,2-bis(4-hydroxyphenyl)-5-methylhexane, benzyl-p-hydroxybenzoate, 4-(4-(1-methylethoxy)phenyl)sulphonylphenyl, 4,4'-[1,3-phenylenebis(1-methylethylene]bisphenol, and mixtures thereof.
Claim 12
Dependent Claim
13 words
The record material of claim 9 in which the phenol compound is 2,2-bis(4-hydroxyphenyl)-4-methylpentane.
Claim 13
Dependent Claim
13 words
The record material of claim 9 in which the phenol compound is benzyl-p-hydroxybenzoate.
Claim 14
Dependent Claim
13 words
The record material of claim 9 in which the phenol compound is 4,4'-isopropylidinediphenol.
Claim 15
Dependent Claim
33 words
The record material of claim 1 in which the chromogenic material is selected from the group consisting of 3-diethylamino-6-methyl-7-anilinofluoran; 7-(1-ethyl-2-methylindol-3-yl)-7-(4-diethylamino-2-ethoxyphenyl)-5,7-dihydrofuro[3,4-b]pyridin-5-one; 3-diethylamino-7-(2-chloroanilino)fluoran; 3-(N-methylcyclohexylamino)-6-methyl-7-anilinofluoran; 7-(1-octyl-2-methylindol-3-yl)-7-(4-diethylamino-2-ethoxyphenyl)-5,7-dihydrofuro[3,4-b]pyridin-5-one; 3'-phenyl-7-dibenzylamino-2,2'-spiro-di-[2H-1-benzopyran]; 3-dibutylamino-6-methyl-7-anilinofluoran; 3-(N-ethyl-N-tetrahydrofurfurylamino)-6-methyl-7-anilinofluoran; 3-dibutylamino-7-(2-chloroanilino)fluoran; 3,3-bis(4-dimethylaminophenyl)-6-dimethylaminophthalide; 7-(1-ethyl-2-methylindol-3-yl)-7-(4-diethylamino-2-ethoxyphenyl)-5,7-dihydrofuro,[3,4-b]pyridine-5-one; 3,5',6-tris(dimethylamino)spiro[9H-fluorene-9,1'(3'H)-isobenzofuran]3'-one, and mixtures thereof.
Claim 16
Dependent Claim
11 words
The record material of claim 1 comprising in addition a modifier.
Claim 17
Dependent Claim
18 words
The record material of claim 15 wherein the modifier is selected from 1,2-diphenoxyethane, stearamide, acetoacet-o-toluidine, p-benzylbiphenyl, and phenyl-1-hydroxy-2-naphthoate.
References Cited (Backward Citations)
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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) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |