Patent · US Expired

Bulk dyeing using quinophthalone dyestuffs

US5874582A · kind A · utility

0Cited by

1References

2Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Stephan Michaelis · Leverkusen, DE
Peter Roschger · Ludwigshafen, DE
Volker Hederich

Key dates

Filing date	Jan 27, 1998
Grant date	Feb 23, 1999
Priority date	—
Expiry date	Jan 27, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B25/00
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Dyestuffs of the formula (I) ##STR1## wherein Z represents SO.sub.2 or CO, PA0 A represents optionally substituted alkyl or aryl and PA0 p denotes 1 or 2, which are particularly suitable for the bulk dyeing of plastics, in particular thermoplastics, have been found.

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