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US4260179A
Expired / Lapsed
US
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Color-developing sheet for pressure-sensitive recording sheets
Assignee: Jujo Paper Co Ltd
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Filing: 1979-08-22
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Granted: 1981-04-07
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Expires: 1999-08-22
Abstract
Abstract A color-developing sheet for pressure-sensitive recording sheets, said sheet comprising as a color-developing agent at least one 2,2'-bisphenolsulfone zinc salt selected from compounds of the general formula <IMAGE> (I) wherein R1 and R2 are identical or different, and represent a hydrogen atom, a halogen atom, an alkyl group containing 1 to 10 carbon atoms, a cycloalkyl group containing 3 to 10 carbon atoms, an aralkyl group containing 7 to 11 carbon atoms, or a phenyl group.
Inventors
- 👤 Akihiro Yamaguchi
- 👤 Tadashi Kobayashi
- 👤 Keizaburo Yamaguchi
- 👤 Kisuke Osawa
- 👤 Hisamichi Murakami
- 👤 Noboru Yamato
- 👤 Akira Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:10
CPC Classifications
C; C07; C07C; C07C317/00; C07F; C07F3/00; C07F3/003; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
A color-developing sheet for pressure-sensitive recording sheets, said color-developing sheet comprising a base sheet and associated therewith a color-developing agent comprising at least one 2,2'-bisphenolsulfone zinc salt selected from the group consisting of compounds of the following formula ##STR5## wherein R 1 and R 2 are identical or different, and represent a hydrogen atom, a halogen atom, an alkyl group containing 1 to 10 carbon atoms, a cycloalkyl group containing 3 to 10 carbon atoms, an aralkyl group containing 7 to 11 carbon atoms, or a phenyl group.
Claim 2
Dependent Claim
88 words
A color-developing sheet for pressure-sensitive recording sheets, said color-developing sheet comprising a base sheet and associated therewith a color-developing agent comprising at least one 2,2'-bisphenolsulfone zinc salt selected from the group consisting of compounds of the following formula ##STR5## wherein R 1 and R 2 are identical or different, and represent a hydrogen atom, a halogen atom, an alkyl group containing 1 to 10 carbon atoms, a cycloalkyl group containing 3 to 10 carbon atoms, an aralkyl group containing 7 to 11 carbon atoms, or a phenyl group.
Claim 3
Dependent Claim
32 words
The color-developing sheet of claim 1 wherein the 2,2'-bisphenolsulfone zinc salt is a product from at least one p-substituted phenol selected from the group consisting of p-halophenols, p-alkylphenols, p-cycloalkylphenols, p-(α,α-dimethylbenzyl)phenol and p-phenylphenol.
Claim 4
Dependent Claim
36 words
The color-developing sheet of claim 1 which further comprises at least one polyvalent metal compound selected from the group consisting of oxides, hydroxides and carbonates of zinc, magnesium, aluminum, lead, titanium, calcium, cobalt, nickel and manganese.
Claim 5
Dependent Claim
14 words
The color-developing sheet of claim 3, wherein the polyvalent metal compound is zinc oxide.
Claim 6
Dependent Claim
32 words
The color-developing sheet of claim 3 or 4, wherein the amount of the polyvalent metal compound is from 0.01 to 10 parts by weight, per part by weight of the color-developing agent.
Claim 7
Dependent Claim
30 words
The color-developing sheet of claim 5, wherein the amount of the polyvalent metal compound is from 0.2 to 5 parts by weight, per part by weight of the color-developing agent.
Claim 8
Dependent Claim
30 words
The color-developing sheet of claim 1, wherein the color-developing sheet comprises the base sheet and a layer of a coating composition containing said color-developing agent coated on said base sheet.
Claim 9
Dependent Claim
27 words
The color-developing sheet of claim 7, wherein the color-developing agent is applied to the base sheet in an amount of from 0.1 to 7 g/m 2 .
Claim 10
Dependent Claim
30 words
The color-developing sheet of claim 8 wherein said coating further comprises from about 0.01 to 10 parts by weight of zinc oxide per part by weight of the color-developing agent.
Claim 11
Dependent Claim
16 words
The color-developing sheet of claim 1, wherein the color-developing agent is incorporated in said base sheet.
Claim 12
Dependent Claim
33 words
The color-developing sheet of claim 1, wherein the zinc salt of formula (I) is selected from the group consisting of 2,2'-bis(p-tert-octylphenol)sulfone zinc salt, 2,2'-bis(p-tert-butylphenol)sulfone zinc salt, 2,2'-bis(p-cyclohexylphenol)sulfone zinc salt, and 2,2'-bis(p-phenylphenol)sulfone zinc salt.
References Cited (Backward Citations)
JPS4910856A
Cited
JPS521329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |