Whitened polymers and the use thereof in coating slips for coating substrates

US6339117B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Udo Eckstein · Cologne, DE
• Siegfried Korte · Odenthal, DE
• Ulrich Feldhues · Bensberg, DE
• Hans Geiger · Gettorf, DE
• Bernhard Hunke · Hennef (Sieg), DE
• Thomas Roick · Leverkusen, DE
• Gunter Sackmann · Leverkusen, DE

Key dates

• Filing date: Feb 28, 2000
• Grant date: Jan 15, 2002
• Expiry date: Feb 28, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/2861
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to polymers whitened with optical brighteners obtained by(a) emulsion polymerization of acrylonitrile with or without a comonomer in the presence or absence of a graftable substrate, and(b) addition of an optical brightener before, during, or after the emulsion polymerization.