US5173477A
Expired / Lapsed
US
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Polyphenylmethane heat-sensitive recording media
Assignee: Arkema France SA
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Filing: 1991-12-19
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Granted: 1992-12-22
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Expires: 2011-12-19
Abstract
Abstract Novel heat-sensitive recording media include a support substrate, e.g., paper or a synthetic polymer film, having a thermosensitive recording layer deposited thereon, such thermosensitive recording layer comprising a colorant precursor, a heat-sensitive developer therefor and at least one polyphenylmethane of the formula (A1): ##STR1## in which R 1 and R 2 , which may be identical or different, are each a halogen atom, NO 2 , CN, OCH 3 , H or an alkyl radical having up to 5 carbon atoms; n is 3, 4 or 5; p is 1, 2 or 3; g is 0 or 1 and the maximum value of p+g is 2; and the melting point of which polyphenylmethane being at least 50° C.
Inventors
- 👤 Raymond Commandeur
- 👤 Jean-Pierre Sarron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:10
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375; C; C07; C07C; C07C15/00; C07C15/12; C07C15/16; C07C25/00; C07C25/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A heat-sensitive recording material including a support substrate having a thermosensitive recording layer deposited thereon, said thermosensitive recording layer comprising a colorant precursor, a heat-sensitive developer therefor and at least one polyphenylmethane of the formula (A1): ##STR14## in which R 1 and R 2 , which may be identical or different, are each a halogen atom, NO 2 , CN, OCH 3 , H or an alkyl radical having up to 5 carbon atoms; n is 3, 4 or 5; p is 1 or 2; q is 0 or 1 and the maximum value of p+q is 2; and the melting point of which polyphenylmethane being at least 50° C.
Claim 2
Dependent Claim
110 words
A heat-sensitive recording material including a support substrate having a thermosensitive recording layer deposited thereon, said thermosensitive recording layer comprising a colorant precursor, a heat-sensitive developer therefor and at least one polyphenylmethane of the formula (A1): ##STR14## in which R 1 and R 2 , which may be identical or different, are each a halogen atom, NO 2 , CN, OCH 3 , H or an alkyl radical having up to 5 carbon atoms; n is 3, 4 or 5; p is 1 or 2; q is 0 or 1 and the maximum value of p+q is 2; and the melting point of which polyphenylmethane being at least 50° C.
Claim 3
Dependent Claim
22 words
The heat-sensitive recording material as defined by claim 1, the melting point of said polyphenylmethane (A1) ranging from 50° to 220° C.
Claim 4
Dependent Claim
23 words
The heat-sensitive recording material as defined by claim 1, wherein R 1 and R 2 are each CH 3 , Cl or H.
Claim 5
Dependent Claim
20 words
The heat-sensitive recording material as defined by claim 1, wherein said support substrate comprises paper or a synthetic polymer film.
References Cited (Backward Citations)
EP0367228A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-22 | 1996-06-22 | 1996-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-22 | 2000-06-22 | 2000-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-22 | 2004-06-22 | 2004-12-22 | $7700.00 | Window Closed / Lapsed |