Infrared-reflecting colorants

US6180025A · kind A · utility

Assignee

• Clariant Corporation · DE

Inventors

• Axel Schoenfeld · Wiesbaden, DE
• Andreas Stohr · Freinsheim, DE

Key dates

• Filing date: Apr 16, 1999
• Grant date: Jan 30, 2001
• Expiry date: Apr 16, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G9/0926
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Colorant composition consisting essentially of one or more cholesteric liquid-crystalline polymers having a pitch of the helical superstructure of between 760 nm and 500 .mu.m, and of at least one colorant which absorbs light in the visible wavelength range. Suitable colorants are organic or inorganic pigments or dyes. Coatings featuring such colorant compositions are notable for heat insulation properties.