The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 2021
Filed:
Dec. 17, 2013
Solvay Specialty Polymers Italy S.p.a., Bollate, IT;
Julio A. Abusleme, Saronno, IT;
Christine Hamon, Arese, IT;
Giorgio Canil, Monza, IT;
Marco Mirenda, Rho, IT;
SOLVAY SPECIALTY POLYMER ITALY S.P.A., Bollate, IT;
Abstract
The present invention pertains to a process for the manufacture of a dense film. The process includes processing, in a molten phase, a solid composition [composition (C)] comprising; at least one vinylidene fluoride (VDF) fluoropolymer comprising one or more carboxylic acid functional end groups [polymer (F)], at least one poly(alkylene oxide) (PAO) of formula (I):HO—(CHCHRO)—R  (I) wherein Ris a hydrogen atom or a C-Calkyl group, Ris a hydrogen atom or a —CHalkyl group and n is an integer comprised between 2000 and 40000, preferably between 4000 and 35000, more preferably between 11500 and 30000, and -optionally, at least one inorganic filler [filler (I)]; thereby providing a dense film having a thickness of from 5 μm to 30 μm. The present invention also pertains to the dense film provided by this process and to the use of the dense film as dense separator in electrochemical devices.