Patent US5175282A successfully refreshed from Google Patents.
US5175282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of copper phthalocyanine pigments of the beta-modification
Assignee: BASF SE
•
Filing: 1991-12-09
•
Granted: 1992-12-29
•
Expires: 2011-12-09
Abstract
Abstract Strong, transparent and readily dispersible copper phthalocyanine pigments are obtained by grinding the crude pigment in the presence of from 1 to 10% by weight (based on the crude pigment) of an organic liquid at from 90° to 140° C., the pigment forms obtained giving printing inks with very good flow characteristics.
Inventors
- 👤 Karl Roth
- 👤 Rudolf Polster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:42
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0025; C09B67/0026; C09B67/0001; C09B67/0014; C09B67/0016; C09B67/0022; C09B67/0023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
A process for preparing a strong, transparent and readily dispersible copper phthalocyanine pigment of the β-modification consisting of grinding crude copper phthalocyanine in the absence of any grinding aids in the presence of from 1 to 10% by weight, based on the crude pigment, an organic liquid selected from the group consisting of di-C 1 -C 12 -alkyl phthalate, N-methylpyrrolidone, diethylene glycol, butoxyethanol, phenoxyethanol, ethylene glycol acetate, ethylene glycol diacetate and mixtures thereof, at from 90° to 140° C., and then recrystallizing the mill base in an aqueous organic phase.
Claim 2
Dependent Claim
90 words
A process for preparing a strong, transparent and readily dispersible copper phthalocyanine pigment of the β-modification consisting of grinding crude copper phthalocyanine in the absence of any grinding aids in the presence of from 1 to 10% by weight, based on the crude pigment, an organic liquid selected from the group consisting of di-C 1 -C 12 -alkyl phthalate, N-methylpyrrolidone, diethylene glycol, butoxyethanol, phenoxyethanol, ethylene glycol acetate, ethylene glycol diacetate and mixtures thereof, at from 90° to 140° C., and then recrystallizing the mill base in an aqueous organic phase.
Claim 3
Dependent Claim
24 words
A process as claimed in claim 1, wherein the amount of organic liquid is from 2 to 5% by weight, based on crude pigment.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1, wherein the grinding takes place at from 100° to 120° C.
Claim 5
Dependent Claim
19 words
A process as claimed in claim 1, wherein the organic liquid used is di-C 1 -C 12 -alkyl phthalate.
References Cited (Backward Citations)
CA676700A
Cited
US2556726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-29 | 1996-06-29 | 1996-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-29 | 2000-06-29 | 2000-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-29 | 2004-06-29 | 2004-12-29 | $7700.00 | Window Closed / Lapsed |