Antifreeze concentrate containing the colorant C.I. Reactive Violet 5

US6818147B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Bernd Wenderoth · Lampertheim, DE
• Ladislaus Meszaros · Mutterstadt, DE
• Uwe Nitzschke · Ludwigshafen, DE
• Stefan Dambach · Nümbrecht, DE

Key dates

• Filing date: Oct 2, 2003
• Grant date: Nov 16, 2004
• Expiry date: Oct 2, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K5/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Antifreeze concentrates based on alkylene glycols or derivatives thereof or on glycerol, comprising from 0.0005 to 0.1% by weight of the dye C.I. Reactive Violet 5 (Color Index No. 18097), based on the total amount of the concentrate.