High melt flow fluoropolymer composition
AssigneeArkema Inc.
InventorsJames T. Goldbach, James J. Henry, Sean M. Stabler, Jérôme Chauveau
Life of this patent
Estimating the term…
Abstract
The invention relates to very high melt flow fluoropolymer compositions, having low melt viscosities. The fluoropolymers have low molecular weights of from 5 kDa to 200 kDa and melt viscosities of less than 2 kilopoise (kP) at 232° C. and 100 s−1. One use for the high melt flow fluoropolymers is in the formation of very small diameters fibers, useful for melt-blown non-woven materials. Fiber diameters of less than 9 microns, and preferably 500 to 2000 nm can be produced.
Claims17
A fluoropolymer composition comprising a fluoropolymer, wherein said fluoropolymer is a homopolymer of vinylidene fluoride or a copolymer having a random homogeneous distribution of monomers and at least 70 weight percent of vinylidene fluoride monomer units;
- and wherein said fluoropolymer has a melt viscosity of 0.01 to 0.4 kP, at 100 s−1 and 232° C., as measured by parallel plate rheology, and has a weight average molecular weight of from 15,000 to 140,000 Dalton as measured by GPC relative to polymethyl methacrylate (PMMA) narrow standards.
Dependencies are inferred from the claim text.