US4748151A
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Heat transfer recording sheet
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1986-08-05
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Granted: 1988-05-31
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Expires: 2006-08-05
Abstract
Abstract A heat transfer recording sheet is disclosed, comprising a base film having provided on one side thereof a coloring material layer containing at least a subliming dye and a binder, wherein said binder is a polycarbonate resin having a repeating unit represented by the formula (I): <IMAGE> (I) wherein R1 represents an aryl group; and R2 represents a hydrogen atom, an alkyl group or an aryl group. In another embodiment, said binder is a copolymer of polycarbonate resin having a repeating unit represented by the formula (I) and a repeating unit represented by the formula (II) <IMAGE> (II) wherein rings A and B each represents a phenylene group or a phenylene group substituted with an alkyl group or a halogen atom; and X represents a divalent group selected from <IMAGE> -O-, -S-, -SO-, and -SO2-, wherein R3 and R4 each represents a hydrogen atom or an alkyl group; and R5 represents an alkylene group.
Inventors
- 👤 Yukichi Murata
- 👤 Takao Hirota
- 👤 Hiroshi Urabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:42
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/392; B41M5/395; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
66 words
A heat transfer recording sheet comprising a base film having provided on one side thereof a coloring material layer containing at least a subliming dye and a binder, wherein said binder is a polycarbonate resin having a repeating unit represented by the formula (I): ##STR20## wherein R 1 represents an aryl group; and R 2 represents a hydrogen atom, an alkyl group or an aryl group.
Claim 2
Dependent Claim
66 words
A heat transfer recording sheet comprising a base film having provided on one side thereof a coloring material layer containing at least a subliming dye and a binder, wherein said binder is a polycarbonate resin having a repeating unit represented by the formula (I): ##STR20## wherein R 1 represents an aryl group; and R 2 represents a hydrogen atom, an alkyl group or an aryl group.
Claim 3
Dependent Claim
31 words
A heat transfer recording sheet as in claim 1, wherein R 1 represents a phenyl group, and R 2 represents a hydrogen atom, a lower alkyl group or a phenyl group.
Claim 4
Dependent Claim
25 words
A heat transfer recording sheet as in claim 2, wherein said lower alkyl group is a methyl group, an ethyl group or a propyl group.
Claim 5
Dependent Claim
27 words
A heat transfer recording sheet as in claim 1, wherein R 1 represents a phenyl group, and R 2 represents a methyl group or a phenyl group.
Claim 6
Dependent Claim
34 words
A heat transfer recording sheet as in claim 1, wherein said polycarbonate resin has a reduced viscosity of from 0.22 to 1.50 as measured in a 0.6 g/dl methylene chloride solution at 20° C.
Claim 7
Dependent Claim
34 words
A heat transfer recording sheet as in claim 1, wherein said polycarbonate resin has a reduced viscosity of from 0.31 to 1.20 as measured in a 0.6 g/dl methylene chloride solution at 20° C.
Claim 8
Dependent Claim
21 words
A heat transfer recording sheet as in claim 1, wherein said subliming dye is a methine dye or an indoaniline dye.
Claim 9
Dependent Claim
182 words
A heat transfer recording sheet comprising a base film having provided on one side thereof a coloring material layer containing at least a subliming dye and a binder, wherein said binder is a copolymer of polycarbonate resin having a repeating unit represented by the formula (I): ##STR21## wherein R 1 represents an aryl group; and R 2 represents a hydrogen atom, an alkyl group or an aryl group, and repeating unit represented by the formula (II): ##STR22## wherein rings A and B each represents a phenylene group or a phenylene group substituted with an alkyl group or a halogen atom; and X represents a divalent group selected from ##STR23## --O--, --S--, --SO--, and --SO 2 --, wherein R 3 and R 4 each represents a hydrogen atom or an alkyl group; and R 5 represents an alkylene group, said repeating unit of the formula (I) being present in an amount of not less than 30 weight percent and not more than 99 weight percent, and said repeating unit of the formula (II) being present in an amount less than 70 weight percent.
Claim 10
Dependent Claim
182 words
A heat transfer recording sheet comprising a base film having provided on one side thereof a coloring material layer containing at least a subliming dye and a binder, wherein said binder is a copolymer of polycarbonate resin having a repeating unit represented by the formula (I): ##STR21## wherein R 1 represents an aryl group; and R 2 represents a hydrogen atom, an alkyl group or an aryl group, and repeating unit represented by the formula (II): ##STR22## wherein rings A and B each represents a phenylene group or a phenylene group substituted with an alkyl group or a halogen atom; and X represents a divalent group selected from ##STR23## --O--, --S--, --SO--, and --SO 2 --, wherein R 3 and R 4 each represents a hydrogen atom or an alkyl group; and R 5 represents an alkylene group, said repeating unit of the formula (I) being present in an amount of not less than 30 weight percent and not more than 99 weight percent, and said repeating unit of the formula (II) being present in an amount less than 70 weight percent.
Claim 11
Dependent Claim
65 words
A heat transfer recording sheet as in claim 1, wherein R 1 represents a phenyl group; R 2 represents a hydrogen atom, a lower alkyl group or a phenyl group; R 3 and R 4 each represents a hydrogen atom or an alkyl group having from 1 to 2 carbon atoms; and R 5 represents an alkylene group having from 5 to 6 carbon atoms.
Claim 12
Dependent Claim
23 words
A heat transfer recording sheet as in claim 1, wherein X is --CH 2 --, ##STR24## --O--, --S--, --SO-- or --SO 2 --.
Claim 13
Dependent Claim
56 words
A heat transfer recording sheet as in claim 1, wherein rings A and B each represents a phenylene group substituted with one or two methyl groups or one or two bromine atoms at the ortho-position or positions with respect to the carbon atom connecting to the oxygen atom derived from a hydroxyl group of starting bisphenol.
Claim 14
Dependent Claim
16 words
A heat transfer recording sheet as in claim 11, wherein the moiety of the formula ##STR25##
Claim 15
Dependent Claim
16 words
A heat transfer recording sheet as in claim 11, wherein the moiety of the formula ##STR26##
Claim 16
Dependent Claim
29 words
A heat transfer recording sheet as in claim 8, wherein R 1 represents a phenyl group; R 2 represents a methyl group or a phenyl group; X represents ##STR27##
References Cited (Backward Citations)
US4541830A
Cited
JPS60229790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |