Patent · US Expired

High color strength diarylide yellow pigment compositions

US4648907A · kind A · utility

7Cited by

7References

6Claims

0Family size

Assignee

BASF SE

Inventors

Byron G. Hays · Chagrin Falls, US
Robert J. Stanaback · Gladstone, US

Key dates

Filing date	Apr 12, 1985
Grant date	Mar 10, 1987
Priority date	—
Expiry date	Apr 12, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B67/0055
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Improved diarylide yellow pigment compositions having high color strength. The compositions are manufactured by modifying tetrazotized 3,3'-dichlorobenzidine with a solution of about 3 to about 5 mole percent of a first acetoacetarylide, followed by coupling into a second acetoacetarylide such as acetoacetanilide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.