US3872103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of deep-shade 3,4,9,10-perylenetetracarboxylic acid dianhydride pigments
Assignee: BASF SE
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Filing: 1973-10-24
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Granted: 1975-03-18
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Expires: 1993-10-24
Abstract
Abstract A process for the manufacture of deep-shade perylene-3,4,9,10tetracarboxylic acid dianhydride pigments, wherein finely ground crude pigment of which the average primary particle size is from 0.01 to 1 Mu is treated with a primary or tertiary aromatic amine which is liquid at the treatment temperature, or with a strongly polar aprotic solvent, as swelling agent, until the pigment has acquired the optimum color strength. After removal of the swelling agent, a deep-shade, pure pigment is obtained, which is suitable for all pigmentation purposes.
Inventors
- 👤 Wolfgang Fabian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:59
CPC Classifications
C; C09; C09B; C09B68/00; C09B68/20; C09B68/24; C09B3/00; C09B3/14; C09B3/18; C09B67/00; C09B68/40; C09B68/44; C09B68/443
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
129 words
A PROCESS FOR THE MAUNFACTURE OF A DEEP-SHADE 3,4,9,10PERYLENETETRACARBOXYLIC ACID DIANHYDRIDE PIGMENT, WHICH PROCESS COMPRISES: GRINDING THE INITIAL PIGMENT IN DRY CRUDE FROM UNTIL ITS AVERAGE PRIMARY PARTICLE SIZE IS 0.01 TO 1U, THEN TREATING THE RESULTING GROUND PIGMENT AT A TEMPERATURE OF FROM 50* TO 200*C, WITH A LIQUID CONSISTING ESSENTIALLY OF A SWELLING AGENT SELECTED FROM THE GROUP CONSISTING OF PRIMARY OR TERTIARY AROMATIC AMINES WHICH ARE LIQUID AT THE TREATMENT TEMPERATURE, DIMETHYL FORMAMIDE, NMETHYL-PYRROLIDONE, DIMETHYLSULFOXIDE, ACETONITRILE OR ACRYLONITRILE, THE RATIO OF SAID GROUND PIGMENT TO SWELLING AGENT BEING FROM 1:0.5 TO 1:5 PARTS BY WEIGHT, SAID TREATMENT BEING CARRIED OUT FOR A PERIOD OF TIME SUFFICIENT FOR THE PIGMENT TO ACQUIRE APPROXIMATELY ITS OPTIMUM COLOR STRENGTH, AND REMOVING THE SWELLING AGENT FROM THE THUS TREATED PIGMENT.
Claim 2
Dependent Claim
129 words
A PROCESS FOR THE MAUNFACTURE OF A DEEP-SHADE 3,4,9,10PERYLENETETRACARBOXYLIC ACID DIANHYDRIDE PIGMENT, WHICH PROCESS COMPRISES: GRINDING THE INITIAL PIGMENT IN DRY CRUDE FROM UNTIL ITS AVERAGE PRIMARY PARTICLE SIZE IS 0.01 TO 1U, THEN TREATING THE RESULTING GROUND PIGMENT AT A TEMPERATURE OF FROM 50* TO 200*C, WITH A LIQUID CONSISTING ESSENTIALLY OF A SWELLING AGENT SELECTED FROM THE GROUP CONSISTING OF PRIMARY OR TERTIARY AROMATIC AMINES WHICH ARE LIQUID AT THE TREATMENT TEMPERATURE, DIMETHYL FORMAMIDE, NMETHYL-PYRROLIDONE, DIMETHYLSULFOXIDE, ACETONITRILE OR ACRYLONITRILE, THE RATIO OF SAID GROUND PIGMENT TO SWELLING AGENT BEING FROM 1:0.5 TO 1:5 PARTS BY WEIGHT, SAID TREATMENT BEING CARRIED OUT FOR A PERIOD OF TIME SUFFICIENT FOR THE PIGMENT TO ACQUIRE APPROXIMATELY ITS OPTIMUM COLOR STRENGTH, AND REMOVING THE SWELLING AGENT FROM THE THUS TREATED PIGMENT.
Claim 3
Dependent Claim
26 words
A process as claimed in claim 1 wherein the treatment with said swelling agent is carried out at a temperature of from 80* to 130* C.
Claim 4
Dependent Claim
22 words
A process as claimed in claim 1 wherein the swelling agent is selected from the group consisting of p-chloroaniline, anisidine and phenetidine.
Claim 5
Dependent Claim
13 words
A process as claimed in claim 1 wherein the swelling agent is dimethylformamide.
Claim 6
Dependent Claim
13 words
A process as claimed in claim 1 wherein the swelling agent is quinoline.
Claim 7
Dependent Claim
22 words
A process as claimed in claim 1 wherein the initial dry crude pigment is ground in the presence of solid grinding aids.
Claim 8
Dependent Claim
28 words
A process as claimed in claim 1 wherein the initial dry crude pigment is ground to an average primary particle size of from 0.01 to 0.05 Mu .
Claim 9
Dependent Claim
32 words
A process as claimed in claim 7 wherein the ground pigment is treated with said swelling agent until the average particle size reaches a value of from 0.03 to 0.1 Mu .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |