Matting agent radiation for curing coatings

US6770128B1 · kind B1 · utility

Assignee

• Grace GmbH & Co. KG · DE

Inventors

• Georg Lueers · Westhofen, DE
• David J. Kent · La Mirada, US
• Volker Petry · Hettenleidelheim, DE
• Ute Pospesch · Worms, DE

Key dates

• Filing date: Apr 11, 2000
• Grant date: Aug 3, 2004
• Expiry date: Apr 11, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D7/42
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A matting agent composition comprises silica and wax wherein the composition has a median particle size in the range of about 2-12 microns, a wax content in the range of about 15-30 wt. % and the silica has a pore volume in the range of about 0.8 to 1.4 cc/g. The matting agent is particularly suitable for radiation curable coatings. The matting agent has been shown to be particularly efficient in such coatings, as well as shows consistent gloss over varying coat weights.