Fluoropolymer dispersions

US6174979A · kind A · utility

Assignee

• Ausimont S.p.A. · IT

Inventors

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

Key dates

• Filing date: Jul 23, 1998
• Grant date: Jan 16, 2001
• Expiry date: Jul 23, 2018

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: EQU R.sub.f --L--(OCH(R.sub.1)--CH(R.sub.2)).sub.n --O--A (I) wherein: PA1 n is an integer comprised between 4 and 60; PA1 L is selected from: PA1 --(CF(Y)--CO--O).sub.p R'--; --(CF(Y)--CO--NH).sub.p R'--; --(CF(Y)--SO.sub.2 --NH).sub.p R'--; PA1 wherein: p is 0 or 1; Y can be F or CF.sub.3 ; R' is an alkylic radical C.sub.1 -C.sub.5 ; PA1 R.sub.1, R.sub.2 can preferably be both H or the former H and the latter CH.sub.3, PA1 R.sub.f can be a radical of (per)fluoroalkane type from 4 to 20 C atoms or of (per)fluoropolyether type; PA1 A is selected from the following ones: PA1 --H; --CH, --CH.sub.2 OH; --CH.sub.2 OCH.sub.2 CH.sub.2 OH; --CH.sub.2 (OCH.sub.2 CH.sub.2).sub.n'" OR' wherein n'" is an integer between 2 and 15 and R' is H, CH.sub.3, COCH.sub.3 ; --CONHCH.sub.2 CH.sub.2 OH.