JOHN T OUDERKIRK
Broker in Westerly, RI
License number
Massachusetts 144970
Issued Date
Jul 11, 2005
Expiration Date
May 10, 2008
Type
Broker
Address
Address
Westerly, RI 02891
Professional information
John T. Ouderkirk, Jr., Westerly RI - Lawyer
Office:
John T. Ouderkirk, Jr.
116 High St STE 112, Westerly, RI
116 High St STE 112, Westerly, RI
ISLN:
913624553
Admitted:
1980
Diaryl Pigments With Improved Heat Stability And Transparency Containing Coupled Mixed Bis-Diazotized Diamines And Acid-Substituted Aromatic Amines
US Patent:
4968352, Nov 6, 1990
Filed:
Apr 28, 1988
Appl. No.:
7/187623
Inventors:
Boyd A. Keys - Providence RI
John T. Ouderkirk - Westerly RI
John T. Ouderkirk - Westerly RI
Assignee:
Hoechst Celanese Corporation - Somerville NJ
International Classification:
C09B 6706, C09B 6720, C09B 6722
US Classification:
106494
Abstract:
Diaryl pigments having excellent dried ink transparency and improved process heat stability are prepared by carrying out the coupling of a bisdiazotized substituted 4,4' diaminobiphenyl with acetoacetanilides and/or pyrazolinones in the presence of an added quantity of one or more substituted aromatic amines containing at least one sulfonic or carboxylic acid substituent, or their salts. The pigments exhibit improved tolerance to variations in drying temperatures and to high drying temperatures, and have improved transparency when present in dried ink formulations.