Patent US3754958A successfully refreshed from Google Patents.
US3754958A
Expired / Lapsed
US
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Ammonium salt t reated sulfonated phthalocyanines
Assignee: Wyeth Holdings LLC
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Filing: 1972-05-08
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Granted: 1973-08-28
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Expires: 1992-05-08
Abstract
Abstract A copper phthalocyanine pigment having improved body in a wide variety of vehicle formulations is prepared by treating a partially sulfonated copper phthalocyanine, which contains red and/or green shade unsulfonated copper phthalocyanine together with the sulfonated copper phthalocyanine, with a salt of a primary, secondary, or tertiary alkyl, cycloalkyl, aralkyl, cyclized alkyl or cycloalkyl amine or quaternary ammonium compound having a total of about four to about 18 carbon atoms attached to each nitrogen, in an aqueous medium at a temperature between about 20*C. and about 100*C., the pH of the treated pigment being between about 4 and about 7.
Inventors
- 👤 V Giambalvo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:49
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
41 words
The process of claim 1 where the unsulfonated copper phthalocyanine which is blended has been treated with a nitrogenous compound in an aqueous medium of pH between about 4 and about 7 at a temperature of about 20*C. to about 100*C.
Claim 2
Dependent Claim
28 words
The process of claim 1 which comprises: treating a partially sulfonated copper phthalocyanine containing from 0.03 to 0.18 sulfonic acid groups per phthalocyanine molecule, with said nitrogenous compound.
Claim 3
Dependent Claim
45 words
The process of claim 1 in which the sulfonated copper phthalocyanine being treated with said nitrogenous compound is prepared by blending unsulfonated copper phthalocyanine with a sulfonated copper phthalocyanine to give a mixture having 0.03 to 0.18 sulfonic acid groups per molecule of copper phthalocyanine.
Claim 4
Dependent Claim
28 words
The process of claim 1 wherein 2 to 15 percent of said nitrogenous compound based on the weight of copper phthalocyanine pigment in the final product is used.
Claim 5
Dependent Claim
14 words
The process of claim 1 in which said nitrogenous compound is 1,1,3,3-tetramethylbutyl ammonium acetate.
Claim 6
Dependent Claim
25 words
The process of claim 4 in which at least part of the copper phthalocyanine is green shade copper phthalocyanine blended with a sulfonated copper phthalocyanine.
Claim 7
Dependent Claim
17 words
The process of claim 4 in which red shade copper phthalocyanine is blended with sulfonated cooper phthalocyanine.
Claim 8
Dependent Claim
39 words
The process of claim 4 in which the blending is carried out between dry, partially sulfonated copper phthalocyanine and dry unsulfonated copper phthalocyanine to give a partially sulfonated mixture prior to the nitrogenous compound treatment in the aqueous medium.
Claim 9
Dependent Claim
27 words
The process of claim 4 in which the blending is carried out in the aqueous medium prior to adding the nitrogenous compound in the same aqueous medium.
Claim 10
Dependent Claim
69 words
A readily dispersible copper phthalocyanine pigment consisting essentially of copper phthalocyanine sulfonated to between about 0.03 and about 0.18 sulfonic acid groups per copper phthalocyanine molecule, in pigmentary form and on the surface thereof, a salt of a nitrogenous compound having a total of about four to about 18 carbon atoms total, and which pigment when suspended in water has a pH of between about 4 and about 7.
Claim 11
Dependent Claim
21 words
The pigment of claim 11 in which the total nitrogenous compound present is from about 0.35 to 8 percent by weight.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |