Mixtures of mono-, bi- and non-functional fluorinated polymers comprising a plurality of (per)fluoropolyether segments

US10533071B2 · kind B2 · utility

Assignee

• SOLVAY SPECIALTY POLYMERS ITALY S.P.A. · IT

Inventors

• Claudio Adolfo Pietro Tonelli · Sesto San Giovanni, IT
• Ivan Wlassics · Albenga, IT
• Giuseppe Marchionni · Milano, IT
• Letanzio Bragante · Padova, IT

Key dates

• Filing date: Nov 23, 2015
• Grant date: Jan 14, 2020
• Expiry date: Jan 10, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/025
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed are mixtures containing: mono- and bi-functional polymers [polymers (P-A) and (P—B)] comprising a plurality of (per)fluoropolyether segments [segments (SRF)] joined together by hydrogenated (poly)ether segments [segments (SH)], said polymers having two ends, wherein one or both ends comprises a hydroxy or a leaving group; a non-functional polymer comprising a plurality of (per)fluoropolyether segments (SRF) joined together by hydrogenated (poly)ether segments (SH), with the proviso that the hydrogenated (poly)ether segments (SH) are not segments of formula —CH2OCH2OCH2—. Disclosed are also monofunctional polymers (P-A) that can be isolated from such mixtures. Methods for the obtainment of the mixtures and for separating the polymers therein contained are also provided, as well as methods of using the mixtures or each polymer therein contained as intermediates or building blocks for the synthesis of other polymers or as ingredients of compositions.