Modified nacreous luster pigments for water paint systems

US6176918A · kind A · utility

Assignee

• Merck Patent Gesellschaft mit Beschrankter Haftung and Huels AG · DE

Inventors

• Ralf Glausch · Darmstadt, DE
• Nicole Fornoff · Darmstadt, DE
• Joachim Duschek · Pfungstadt, DE
• Burkhard Standke · Soest, DE
• Roland Edelmann · Wehr, DE

Key dates

• Filing date: May 22, 1998
• Grant date: Jan 23, 2001
• Expiry date: May 22, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2220/106
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Modified pearl luster pigments for waterborn coating systems, based on a platelet-form substrate coated with metal oxides and, located on the topmost metal oxide layer, a top layer consisting of at least two oxides and/or mixed oxides from the group consisting of silicon dioxide, aluminium oxide, cerium oxide, titanium oxide and zirconium oxide, and on a water-based oligomeric silane system. The oligomeric silane system can be described, for example, by the following approximate structure: EQU [HO[Si(A)(OH).sub.z (CH.sub.3).sub.1-z O].sub.a [Si(B)(OH).sub.y (CH.sub.3).sub.1-y O].sub.b [Si(E)(OH).sub.w (CH.sub.3).sub.1-w O].sub.c [Si(D)(OH).sub.v (CH.sub.3).sub.1-v O].sub.d H].(HX).sub.e (IX) where A=aminoalkyl radical derived from the general formula V, B=glycidyl ether alkyl radical derived from the general formula VI, E=acryloxyalkyl or methacryloxyalkyl radical of the general formula VII, D=alkyl radical of the general formula VIII, HX=monobasic acid, where X=inorganic or organic acid radical such as, for example, chloride, nitrate, formate, acetate, v is equal to 0 or 1 and w is equal to 0 or 1 and y is equal to 0 or 1 and z is equal to 0 or 1 and a+b+c+d.gtoreq.4 and a.ltoreq.…