Process for producing pigment particles of defined shape and size

US6136251A · kind A · utility

Assignee

• BASF SE

Inventors

• Karl-Heinz Etzbach · Bischofswerda, DE
• Harald Keller · Ludwigshafen, DE
• Reinhold J. Leyrer · Schifferstadt, DE
• Tillmann Faust · Bad Dürkheim, DE
• Peter Schuhmacher · Mannheim, DE
• Karl Siemensmeyer · Bischofswerda, DE

Key dates

• Filing date: Mar 22, 1999
• Grant date: Oct 24, 2000
• Expiry date: Mar 22, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/38
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing pigment particles of defined size and shape comprises treating a sheetlike structure having through openings of defined shape and size with a polymerizable substance or mixture of substances in such a way that the openings are filled, removing any solvent present, polymerizing the substance or substance mixture, and isolating the resulting pigment particles from the openings. The pigments are readily varied in size and shape by variation of the substrate parameters and are useful for the known pigment applications, especially coatings, paints and inks.