Aqueous compositions of perfluoropolyether phosphates and use thereof to confer oleo-repellence to paper

US7141140B2 · kind B2 · utility

Assignee

• SOLVAY SOLEXIS S.P.A. · IT

Inventors

• Patrizia Maccone · Milano, IT
• Fiorenza D'Aprile · Milano, IT
• Mario Visca · Alessandria, IT

Key dates

• Filing date: Jan 13, 2003
• Grant date: Nov 28, 2006
• Expiry date: Jan 13, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/327
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous compositions of (per)fluoropolyether phosphates of formula:T—O—[Rf—CFY—L—O]P(O)(O−Z+)(OH);   (A)and/or(OH)m(O−Z+)2-mP(O)[O—L—YFC—O—Rf—CFY—L—O—P(O)(O−Z+)]m′——[O—L—YFC—O—Rf—CFY—L—O]P(O)(O−Z+)2-m(OH)m   (B)and use thereof to confer oleo-repellence to the paper by means of the size-press method.