Thermostable pigments, films and effect coatings, and mixtures for their production

US6423246B1 · kind B1 · utility

Assignee

• Consortium für elektrochemische Industrie GmbH · DE

Inventors

• Michael Kasch · Klagenfurt, AT
• Jurgen Kupfer · Berlin, DE
• Franz-Heinrich Kreuzer · Martinsried, DE

Key dates

• Filing date: Apr 10, 2000
• Grant date: Jul 23, 2002
• Expiry date: Apr 10, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A mixture of crosslinkable liquid-crystalline substances having a chiral phase (LC mixture), containing polymerizable groups, where at least 90% of the polymerizable groups are part of molecules containing at least two polymerizable groups (crosslinker molecules), wherein from 3.2 to 15 mmol of polymerizable groups are present per g of LC mixture. The crosslinked pigments show little color shift in the presence of solvents or upon application to substrate different temperatures.