Title:
フルオロポリマー分散系の製造方法
Document Type and Number:
Japanese Patent JP6840073
Kind Code:
B2
Abstract:
The invention pertains to a method for making a fluoropolymer dispersion, said method comprising an aqueous emulsion polymerization of one or more fluorinated monomers wherein said aqueous emulsion polymerization is carried out in an aqueous medium comprising a surfactant mixture [mixture (S)] comprising: at least one perfluorohexanoic acid or salt thereof [surfactant (C6)], in an amount of 1 to 5 g/I, with respect to said aqueous medium; and at least one linear bifunctional perfluoropolyether surfactant [surfactant (PFPE)] complying with formula (I) here below: XpOOC—CF2-0-(CF20) n(CF2CF20)m-CF2—COOXp (I) wherein: Xp, equal to or different from each other, is a hydrogen atom, a monovalent metal, preferably an alkaline metal, or an ammonium group of formula —N(R′n)4, wherein R′n, equal or different at each occurrence, is a hydrogen atom or a C1-C6hydrocarbon group, preferably an alkyl group; n′ and m′ are independently integers >0 such that the number average molecular weight of the surfactant (PFPE) is of 500 to 2500, said surfactant (PFPE) being used in an amount of 0.005 to 0.5 g/I, with respect to said aqueous medium.
Inventors:
Musico, Stefana
Marvaji, Marco
Caperusico, valery
Marvaji, Marco
Caperusico, valery
Application Number:
JP2017516826A
Publication Date:
March 10, 2021
Filing Date:
September 29, 2015
Export Citation:
Assignee:
Solvay Specialty Polymers Italy S.P.A.
International Classes:
C08F2/26; C08F14/18; C08F14/26; C08L27/18
Domestic Patent References:
| JP2003286379A | ||||
| JP2013514407A | ||||
| JP2009052034A | ||||
| JP2013514415A | ||||
| JP11240993A | ||||
| JP2003500495A |
Foreign References:
| US20140200310 | ||||
| CN103764684A | ||||
| WO2013027850A1 |
Attorney, Agent or Firm:
Sonoda/Kobayashi Patent Business Corporation