Latex blends of amorphous perfluorinated polymers and articles derived therefrom

US12116476B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Klaus Hintzer · Woodbury, US
• Tamon Aoki · Tokyo, JP
• Tatsuo Fukushi · Woodbury, US
• Florian D. Jochum · Neuötting, DE
• Peter J. Scott · Madison, US
• Yuta Suzuki · Tsukuba, JP
• Karl D. Weilandt · Minneapolis, US
• Steffen Vowinkel · Mühldorf a. Inn, DE

Key dates

• Filing date: Dec 19, 2019
• Grant date: Oct 15, 2024
• Expiry date: Aug 13, 2041

Classification

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

Abstract

Described herein is a latex blend comprising (i) an amorphous perfluoropolymer and (ii) an aqueous dispersion of semi crystalline fluoropolymer particles, wherein the particles comprise a TFE homopolymer or a TFE copolymer comprising no more than 1 wt % of a second fluorinated monomer, wherein the semi crystalline fluoropolymer particles (a) have an MFI (372° C. with 2.16 kg) of less than 50 g/10 min or (b) are not melt processible and have an SSG of less than 2.190, wherein the semi crystalline fluoropolymer particles have an average diameter greater than 100 nm.