Patent US2624991A successfully refreshed from Google Patents.
US4379897A
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US
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Color-developer for pressure-sensitive sheets
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1981-03-17
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Granted: 1983-04-12
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Expires: 2001-03-17
Abstract
Abstract Disclosed is a color-developer for pressure-sensitive recording sheets, comprising a co-condensate of a reaction intermediate of a p-substituted phenol and a trifunctional or higher phenol, or a polyvalent metal salt of said co-condensate, said reaction intermediate being obtained by the reaction of said p-substituted phenol under alkaline conditions with formaldehyde or a substance capable of generating formaldehyde.
Inventors
- 👤 Makoto Asano
- 👤 Yoshimitu Tanabe
- 👤 Hisamichi Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:19
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; C08G8/08; C08G8/12; C08G8/24; C08L; C08L61/00; C08L61/04; C08L61/06; Y; Y10; Y10S; Y10S525/00; Y10S525/936
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
70 words
A color-developer for pressure-sensitive recording sheets, said color-developer comprising a polyvalent metal salt of a co-condensate obtained by co-condensing a reaction intermediate of at least one p-substituted phenol with at least one trifunctional or higher phenol selected from phenol, 4,4'-isopropylidene-bisphenol, 4,4'-cyclohexylidene-biphenol and 4,4'-biphenol-sulfon under neutral or acidic conditions, said reaction intermediate being obtained by reacting said p-substituted phenol under alkaline conditions with formaldehyde or a substance capable of generating formaldehyde.
Claim 2
Dependent Claim
70 words
A color-developer for pressure-sensitive recording sheets, said color-developer comprising a polyvalent metal salt of a co-condensate obtained by co-condensing a reaction intermediate of at least one p-substituted phenol with at least one trifunctional or higher phenol selected from phenol, 4,4'-isopropylidene-bisphenol, 4,4'-cyclohexylidene-biphenol and 4,4'-biphenol-sulfon under neutral or acidic conditions, said reaction intermediate being obtained by reacting said p-substituted phenol under alkaline conditions with formaldehyde or a substance capable of generating formaldehyde.
Claim 3
Dependent Claim
61 words
The color-developer of claim 1 wherein the p-substituted phenol is a compound represented by the general formula ##STR2## wherein R represents an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or a halogen atom.
Claim 4
Dependent Claim
16 words
The color-developer of claim 1 wherein the p-substituted phenol is p-tert-butylphenol, p-tert-octylphenol, p-cyclohexylphenol or p-α, α-dimethylbenzylphenol.
Claim 5
Dependent Claim
26 words
The color-developer of claim 1 wherein the amount of the trifunctional or higher phenol is from 0.3 to 2.0 moles per mole of the p-substituted phenol.
Claim 6
Dependent Claim
26 words
The color-developer of claim 1 wherein the polyvalent metal salt of the co-condensate is a salt of the co-condensate with zinc, nickel, magnesium, calcium or aluminum.
Claim 7
Dependent Claim
24 words
The color-developer of claim 1 wherein the metal content of the polyvalent metal salt of the co-condensate is from 1.0 to 8.0% by weight.
Claim 8
Dependent Claim
29 words
The color developer of claim 1 wherein 1 mole of at least one p-substituted phenol is reacted with 0.8 to 2.0 moles of the formaldehyde or the formaldehyde-generating substance.
Claim 9
Dependent Claim
22 words
The color developer of claim 1 wherein said reaction intermediate is formed at a reaction temperature of 60° C. to 120° C.
Claim 10
Dependent Claim
49 words
The color developer of claim 1 or 4 wherein the mole ratio (F/P) of the moles of formaldehyde or the formaldehyde-generating substance to the total of the moles of the p-substituted phenol and the moles of trifunctional or higher phenol is within the range of from 0.5 to 0.9.
Claim 11
Dependent Claim
20 words
The color developer of claim 9 wherein said mole ratio (F/P) is within the range of from 0.6 to 0.8.
Claim 12
Dependent Claim
26 words
The color developer of claim 1 or 8 wherein said reaction intermediate is co-condensed with said trifunctional or higher phenol at 80° C. to 130° C.
Claim 13
Dependent Claim
24 words
The color developer of claim 1 wherein the co-condensate or its polyvalent metal salt has a softening point of 70° C. to 140° C.
Claim 14
Dependent Claim
24 words
The color developer of claim 1 wherein the co-condensate or its polyvalent metal salt has a softening point of 80° C. to 110° C.
Claim 15
Dependent Claim
20 words
The color developer of claim 1 wherein said co-condensate or polyvalent metal salt thereof is micropulverized and dispersed in water.
References Cited (Backward Citations)
CA842709A
Cited
US2208331A
Cited
US3672935A
Cited
US3516845A
Cited
US3723156A
Cited
US3732120A
Cited
US3737410A
Cited
US4112160A
Cited
US3988386A
Cited
US4025490A
Cited
US4216299A
Cited
US4216300A
Cited
US4235769A
Cited
US4165103A
Cited
US4165102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |