Patent · US Expired

Aqueous dispersion of fluoropolymers of different particle size

US6867261B2 · kind B2 · utility

10Cited by

8References

42Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Gerd Grossmann · Burgkirchen an der Alz, DE
Gernot Lohr · Altötting, DE
Hermann Bldel · Emmerting, DE

Key dates

Filing date	Apr 3, 2003
Grant date	Mar 15, 2005
Priority date	—
Expiry date	Apr 3, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2205/02
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Aqueous dispersions of fluoropolymers obtained by emulsion polymerization and containing at least one fluoropolymer A) with an average particle size (number-average) of at least 200 nm and at least one fluoropolymer B) with an average particle size (number-average) of not more than 100 nm, one of components A) and B) being a thermoplastic and the other component not being processable from the melt, and the entire dispersion having a non-monomodal number distribution of particle diameter, are suitable for saturating, impregnating surfaces, for example of fibers or sheet-like articles made from fibers or porous materials, in particular for coating glass-fiber fabrics as well as for formulating metal-coating systems.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.