Patent US4348548A successfully refreshed from Google Patents.
Patent US4262938A successfully refreshed from Google Patents.
US4262938A
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: 1981-04-21
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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 nickel salt selected from compounds of the following formula <IMAGE> (II) and <IMAGE> wherein R3, R4, R5, R6, R7 and R8 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, or a mixture of at least one 2,2'-bisphenolsulfone nickel salt of the above formulae (II) and (III) and at least one 2,2'-bisphenolsulfone zinc salt of the following formula <IMAGE> (I) wherein R1 and R2 are the same as R3 through R8 defined above.
Inventors
- 👤 Akihiro Yamaguchi
- 👤 Tadashi Kobayashi
- 👤 Kenzaburo Yamuguchi
- 👤 Hisamichi Murakami
- 👤 Noboru Yamato
- 👤 Akira Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:07
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; C; C07; C07C; C07C317/00; C07C317/16; C07C317/22; C07F; C07F15/00; C07F15/04; C07F15/045; C07F3/00; C07F3/003; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
141 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'-bisphenol-sulfone nickel salt selected from compounds of the following formula ##STR8## wherein R 3 , R 4 , R 5 , R 6 , R 7 and R 8 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 atoms, an aralkyl group containing 7 to 11 carbon atoms, or a phenyl group, or a mixture of at least one 2,2'-bisphenolsulfone nickel salt of the above formulae (II) and (III) and at least one 2,2'-bisphenolsulfone zinc salt of the following formula. ##STR9## wherein R 1 and R 2 are the same as R 3 through R 8 defined above.
Claim 2
Dependent Claim
141 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'-bisphenol-sulfone nickel salt selected from compounds of the following formula ##STR8## wherein R 3 , R 4 , R 5 , R 6 , R 7 and R 8 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 atoms, an aralkyl group containing 7 to 11 carbon atoms, or a phenyl group, or a mixture of at least one 2,2'-bisphenolsulfone nickel salt of the above formulae (II) and (III) and at least one 2,2'-bisphenolsulfone zinc salt of the following formula. ##STR9## wherein R 1 and R 2 are the same as R 3 through R 8 defined above.
Claim 3
Dependent Claim
23 words
The color-developing sheet of claim 1 wherein the color-developing agent is at least one 2,2'-bisphenolsulfone nickel salt of general formulae (II) and (III).
Claim 4
Dependent Claim
37 words
The color-developing sheet of claim 1 wherein the color-developing agent is a mixture of at least one 2,2'-bisphenolsulfone zinc salt of general formula (I) and at least one 2,2'-bisphenolsulfone nickel salt of general formulae (II) and (III).
Claim 5
Dependent Claim
23 words
The color-developing sheet of claim 3 wherein the weight ratio of the zinc salt to the nickel salt is from 20:1 to 1:100.
Claim 6
Dependent Claim
23 words
The color-developing sheet of claim 4 wherein the weight ratio of the zinc salt to the nickel salt is from 10:1 to 1:10.
Claim 7
Dependent Claim
23 words
The color-developing sheet of claim 4 wherein the weight ratio of the zinc salt to the nickel salt is from 5:1 to 1:3.
Claim 8
Dependent Claim
38 words
The color-developing sheet of claim 1 or 3 wherein the 2,2'-bisphenolsulfone zinc salt or nickel 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) phenols and p-phenylphenol.
Claim 9
Dependent Claim
42 words
The color-developing sheet of any one of claims 1, 2 and 3 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 10
Dependent Claim
14 words
The color-developing sheet of claim 8 wherein the polyvalent metal compound is zinc oxide.
Claim 11
Dependent Claim
29 words
The color-developing sheet of claim 9 wherein the amount of the zinc oxide is from 0.01 to 10 parts by weight, per part by weight of the color-developing agent.
Claim 12
Dependent Claim
29 words
The color-developing sheet of claim 9 wherein the amount of the zinc oxide is from 0.2 to 5 parts by weight, per part by weight of the color-developing agent.
Claim 13
Dependent Claim
30 words
The color-developing sheet of claim 8 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 14
Dependent Claim
30 words
The color-developing sheet of claim 8 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 15
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 16
Dependent Claim
27 words
The color-developing sheet of claim 14 wherein the color-developing agent is applied to the base sheet in an amount of from 0.1 to 7 g/m 2 .
Claim 17
Dependent Claim
30 words
The color-developing sheet of claim 15 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 18
Dependent Claim
16 words
The color-developing sheet of claim 1 wherein the color-developing agent is incorporated in said base sheet.
Claim 19
Dependent Claim
14 words
The color-developing sheet of claim 1 wherein the color-developing agent is 2,2'-bis(p-tert-octylphenol)sulfone nickel 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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |