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US4820683A
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US
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Thermally-responsive record material
Assignee: APPLETON PAPERS Inc PO BOX 359 APPLETON WISCONSIN 54912
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Filing: 1987-12-04
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Granted: 1989-04-11
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Expires: 2007-12-04
Abstract
Abstract An improved thermally-responsive record material having improved image retention is disclosed. The invention is an improved thermally-responsive record member, typically a sheet material, bearing a thermally-responsive color-forming composition comprising a chromogenic material, an acidic developer material, and a metal salt of a compound of the formula ##STR1## wherein R a is selected from --CH═CH, ##STR2## --(CH 2 ) 4 --, --(CH 2 ) 3 --, --(CH 2 ) 3 --, --CH 2 --CH═CH--, and --CH 2 --wherein R 1 is selected from hydrogen, halogen, alkyl, oxyalkyl, or NO 2 with the proviso that the alkyl groups are of 1-5 carbons wherein M is a metal selected from Zn, Ca, Sn, Ni, Cu, Al, Co, and Mg.
Inventors
- 👤 Steven L. Vervacke
- 👤 Kenneth D. Glanz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:08
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/32; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 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 contiguous relationship, whereby the melting, softening or sublimation of either material produces a change in color by reaction between the two, a metal salt of the compound of the formula ##STR10## wherein M is a metal selected from Zn, Sn, Ni, Cu, Al, Co, and Mg, and a suitable binder therefor.
Claim 2
Dependent Claim
74 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 contiguous relationship, whereby the melting, softening or sublimation of either material produces a change in color by reaction between the two, a metal salt of the compound of the formula ##STR10## wherein M is a metal selected from Zn, Sn, Ni, Cu, Al, Co, and Mg, and a suitable binder therefor.
Claim 3
Dependent Claim
28 words
The thermally-responsive record material of claim 1 wherein the metal salt of the compound of the formula set forth therein is a zinc salt of styrene acetic acid.
Claim 4
Dependent Claim
16 words
The record material of claim 1, in which the acidic developer material is a phenol compound.
Claim 5
Dependent Claim
33 words
The record material of claim 3 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, 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, and mixtures thereof.
Claim 6
Dependent Claim
13 words
The record material of claim 3 in which the phenol compound is 2,2-bis(4-hydroxyphenyl)-4-methylpentane.
Claim 7
Dependent Claim
13 words
The record material of claim 3 in which the phenol compound is benzyl-p-hydroxybenzoate.
Claim 8
Dependent Claim
21 words
The record material of claim 1 wherein in the metal salt of the compound of the formula (I), M is zinc.
Claim 9
Dependent Claim
21 words
The record material of claim 1 wherein in the metal salt of the compound of the formula (I), M is calcium.
Claim 10
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-benzoypyran]; 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 11
Dependent Claim
11 words
The record material of claim 1 comprising in addition a sensitizer.
Claim 12
Dependent Claim
17 words
The record material of claim 10 wherein the sensitizer is selected from 1,2-diphenoxyethane, acetoacet-o-toluedine, p-benzylbiphenyl, and phenyl-1-hydroxy-2-naphthoate.
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |