Fluoropolymer dispersions

US6359044B1 · kind B1 · utility

Assignee

• Ausimont S.p.A. · IT

Inventors

• Valerio Biancardi · Milano, IT
• Enrico Marchese · Asti, IT
• Fabio Polastri · Milano, IT

Key dates

• Filing date: Jun 18, 2001
• Grant date: Mar 19, 2002
• Expiry date: Jun 18, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2327/18
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Fluoropolymer aqueous dispersions comprising an hydrogenated nonionic surfactant and a fluorinated nonionic surfactant selected from the following classes:Rf—L—(OCH(R1)—CH(R2))n—O—A  (I)wherein:n is an integer comprised between 4 and 60;L is selected from:—(CF(Y)—CO—O)pR′—; —(CF(Y)—CO—NH)pR′—;—(CF(Y)—SO2—NH)pR′—;wherein: p is 0 or 1; Y can be F or CF3; R′ is an alkylic radical C1-C5;R1, R2 can preferably be both H or the former H and the latter CH3,Rf can be a radical of (per)fluoroalkane type from 4 to 20 C atoms or of (per)fluoropolyether type;A is selected from the following ones:—H; —CH, —CH2OH; —CH2OCH2CH2OH; —CH2(OCH2CH2)n′″OR′ wherein n′″ is an integer between 2 and 15 and R′ is H, CH3, COCH3; —CONHCH2CH2OH.