Title:
TOLUENE SULFONIC ACID SWELLING OF PERYLENE PIGMENTS
Document Type and Number:
WIPO Patent Application WO2002048267
Kind Code:
A3
Abstract:
A method of acid swelling crude perylene pigment by treating the crude with about 2 to 10 parts by weight of toluene sulfonic acid at an elevated pressure and at temperatures ranging from 40 to 140 C.
Inventors:
SUNG EDWARD
ROBERTSON GEORGE H
ARIZO CHRIS M
ROBERTSON GEORGE H
ARIZO CHRIS M
Application Number:
PCT/US2001/049878
Publication Date:
October 31, 2002
Filing Date:
November 01, 2001
Export Citation:
Assignee:
SUN CHEMICAL CORP (US)
International Classes:
C09B67/14; (IPC1-7): C09B67/14; C09B5/62
Foreign References:
| DE1237530B | 1967-03-30 | |||
| EP0075182A1 | 1983-03-30 | |||
| FR1205925A | 1960-02-05 | |||
| FR2442875A1 | 1980-06-27 | |||
| US3544586A | 1970-12-01 | |||
| DE946560C | 1956-08-02 | |||
| US3697526A | 1972-10-10 | |||
| EP0807668A2 | 1997-11-19 | |||
| GB710229A | 1954-06-09 | |||
| DE2209040A1 | 1972-09-07 | |||
| US2473015A | 1949-06-14 |
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