Patent · US Expired

Preparation of dyed plastics or polymeric dye particles

US6923836B2 · kind B2 · utility

1Cited by

3References

4Claims

0Family size

Assignee

Ciba Specialty Chemicals Corporation · US

Inventors

Rainer Hildebrand · Lörrach, DE
Peter Werner Sutter · Westhampton Beach, US

Key dates

Filing date	Dec 13, 2001
Grant date	Aug 2, 2005
Priority date	—
Expiry date	Jan 14, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/3437
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present application relates to a process for preparing dyed plastics or polymeric dye particles characterized in that it comprises mixing a high molecular weight organic material with a coloristically effective amount of at least one dye of the formula where R1 is hydrogen, hydroxyl or a radical —NHCO—R6, where R6 is C1-C6alkyl or unsubstituted or C1-C4alkyl- or halogen-substituted phenyl, R2 is hydrogen, hydroxyl or a radical W—R7, where W is —NHCO— or —S— and R7 is C1-C6alkyl or unsubstituted or C1-C4alkyl- or halogen-substituted phenyl, R3 is hydrogen, R4 is hydrogen or hydroxyl, R5 is hydrogen, or R3 and R4 combine to form the radical of the formula, where the rings A and B may independently bear further substituents.

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