Solvay Specialty Polymers Italy S.p.a.

Solvay Solexis, Inc.

Syensqo Specialty Polymers Italy S.p.a.

Valeriy Kapelyushko

Alessio Marrani

Mattia Bassi

Bradley Lane Kent

Stefana Musio

Pasqua Colaianna

Marco Malvasi

Vito Tortelli

Giulio Brinati

Marco Mirenda

Fiorenza D'Aprile

Stefano Vincenzo Radice

Giuseppe Marchionni

Vincenzo Arcella

Ivan Diego Wlassics

Marco Galimberti

Serena Carella

Matteo Fantoni

Stefano Millefanti

Giovanni Comino

Cristiano Monzani

Emanuela Antenucci

Liubov Chernysheva

Ivan Falco

Fabio Polastri

Letanzio Bragante

Eliana Ieva

Alessandro Veneroni

Laura Ponta

Fulvia Roncati

Ritu Ahuja

Evgeny Denisov

Sibdas Singha Mahapatra

Gajanan Manohar Pawar

Vijay Kadam

Rahul Shingte

Chinmay Nardele

The present invention relates to a process for preparing a fluoropolymer in a liquid reaction medium, comprising the following steps:

Method for manufacturing fluoropolymers

The present invention relates to a method for exchanging heat with an object said method comprising using a heat transfer fluid wherein said heat transfer fluid comprises one or more chemical compounds having the general formula (I) wherein: —Rcan be any C-Cfluorinated linear or branched carbon chain which can be partially or fully fluorinated, and can comprise O or S atoms, —X, Y and Z can be independently selected from halogens or hydrogen, with the provision that at least one of X, Y or Z is a halogen.

Heat exchange method using fluorinated compounds having a low GWP

The present invention pertains to a melt-processible fluoropolymer, to a composition comprising the melt-processible fluoropolymer, to a process for manufacturing the melt-processible fluoropolymer and to uses of the melt-processible fluoropolymer in various applications.

Melt-processible fluoropolymer

The invention provides novel latexes of particles of vinylidene fluoride/trifluoroethylene copolymers possessing a more ordered ferroelectric crystalline phase, and hence improved ferro-, pyro-, and piezo-electric properties, and a method for manufacturing the same by emulsion polymerization in the presence of certain cyclic fluorosurfactants.

Vinylidene fluoride and trifluoroethylene containing polymers latexes

The present invention relates to a fluorosurfactant-free emulsion polymerization method for the synthesis of a fluoropolymer, more in particular of a VDF-based polymer.

Method for the synthesis of fluoropolymers

The present invention pertains to a process for manufacturing a semi-crystalline fluoropolymer, to the fluoropolymer obtainable by said process and to uses of said fluoropolymer in various applications.

Process for manufacturing a fluoropolymer

The present invention pertains to a method for manufacturing a melt-processible fluoropolymer, to the melt-processible fluoropolymer obtainable by the process and to uses of the melt-processible fluoropolymer in various applications.

Method for manufacturing an aqueous latex comprising particles of a fluoropolymer

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&#x2014;CF-0-(CF0)(CFCF0)-CF&#x2014;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 &#x2014;N(R'), wherein R&#x2032;, equal or different at each occurrence, is a hydrogen atom or a C-Chydrocarbon group, preferably an alkyl group; n&#x2032; and m&#x2032; are independently integers &#x3e;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.

Method of making fluoropolymer dispersion

The invention pertains to a tetrafluoroethylene (TFE) copolymer comprising recurring units derived from at least one per(halo)fluoroolefin different from TFE [monomer (F)] [monomer (F)], in an amount of 0.005 to 0.250% moles, with respect to the total moles of the copolymer, wherein a particular relation between monomer content and amorphous index is satisfied, and to a process for its manufacture by emulsion polymerization in the presence of certain cyclic surfactants.

Tetrafluoroethylene copolymers

The invention mainly pertains to a method for heat treating a composition [composition (C)] which contains at least one melt-processible perfluoropolymer [polymer (F)] formed of tetrafluoroethylene (TFE) copolymer with one or more perfluorinated comonomers [comonomer (F)] containing at least one unsaturation of ethylene type in amounts from 0.5% to 13% by weight, preferably from 0.6% to 11% by weight, and more preferably from 0.8% to 9% by weight; said polymer (F) possessing reactive end groups comprising at least one of the group consisting of hydrogen atoms, oxygen atoms and ethylenically unsaturated double bonds in an amount of at least 4.5 mmol/kg, the process comprising at least the step of heat-treating the composition (C) at a temperature of at least 260&#xb0; C.

Melt-processable perfluoropolymers having improved thermal and mechanical properties after heating treatment

The invention pertains to a fluoropolymer composition comprising: &#x2014;at least one fluoropolymer [polymer (A)]; &#x2014;at least one benzoxazine compound [compound (B)] of formula (I), wherein each of R, equal to or different at each occurrence, is H or a C-Calkyl group; Ris a C-Chydrocarbon group, possibly comprising heteroatoms, optionally comprising at least one benzoxazine group; j is zero or an integer of 1 to 4; each of R, equal or different at each occurrence, is a halogen or a C-Chydrocarbon group, possibly comprising heteroatoms, optionally comprising at least one benzoxazine group; &#x2014;at least one aromatic polyimide polymer [polymer (PI)]; &#x2014;at least one organic solvent [solvent (S)], and to a method for coating a surface, specifically a metal surface, with a fluoropolymer, using said fluoropolymer composition. 

Fluoropolymer composition

The invention pertains to a tetrafluoroethylene (TFE) copolymer comprising recurring units derived from at least one perfluoroalkyl(oxy)vinylether of formula CF&#x2550;CF&#x2014;O&#x2014;R, wherein Ris a C-Cperfluoroalkyl radical possibly comprising one or more ethereal oxygen atoms [monomer (F)], in an amount of 0.005 to 0.025% moles, with respect to the total moles of the copolymer, wherein a particular relation between monomer content and amorphous index is satisfied, and to a process for its manufacture by emulsion polymerization in the presence of certain cyclic surfactants.

The invention pertains to a process for manufacturing a fluoroelastomer [fluoroelastomer (A)] having a heat of fusion of less than 5 J/g as measured by ASTM D-3418-08, said method comprising emulsion polymerizing vinylidene fluoride (VDF) in the presence of at least one additional fluorinated monomer, in an aqueous polymerization medium, said method comprising polymerizing VDF and said additional fluorinated monomer(s) in the presence of a redox radical initiator system comprising: &#x2014;at least one organic oxidizing agent [agent (O)]; &#x2014;at least one organic reducing agent [agent (R)]; wherein agent (O) is fed to said polymerization medium separately from agent (R), so that agent (O) comes in contact with agent (R) exclusively in said polymerization medium comprising VDF and optional additional monomer(s), to fluoroelastomers having low amount of chain defects and low amount of polar end groups, notably obtainable from said process, and to curable compositions therefrom.

Method for manufacturing fluoroelastomers

The invention mainly pertains to a process for heat treating a composition [composition (C)] which contains at least one melt-processible perfluoropolynner [polymer (F)] formed of tetrafluoroethylene (TFE) copolymer with one or more perfluorinated comonomers [comonomer (F)] containing at least one unsaturation of ethylene type in amounts from 0.5% to 13% by weight, preferably from 0.6% to 11% by weight, and more preferably from 0.8% to 9% by weight; the process comprising at least the step of heat-treating the composition (C) at a temperature of at least 260&#xb0; C. and in the absence of a melt flowable polytetrafluoroethylene. The invention is also related to a melt-processible perfluoropolynner [polymer (F1)] formed of tetrafluoroethylene (TFE) copolymer with one or more perfluorinated comonomers [comonomer (F)] containing at least one unsaturation of ethylene type in amounts from 0.5% to 13% by weight, preferably from 0.6% to 11% by weight, and more preferably from 0.8% to 9% by weight, wherein a particular relation between comonomer (F) content and first melting temperature of polymer (F1) is satisfied.

The invention pertains to a method for making a fluoropolymer comprising an aqueous emulsion polymerization of one or more fluorinated monomers wherein said aqueous emulsion polymerization is carried out in the presence of at least one cyclic fluorocompound of the following formula (I): wherein X, X, X, equal or different from each other are independently selected among H, F, and C(per)fluoroalkyl groups, optionally comprising one or more catenary or non-catenary oxygen atoms; L represents a bond or a divalent group; Ris a divalent fluorinated Cbridging group; Y is a hydrophilic function selected among anionic functionalities, cationic functionalities and non-ionic functionalities.

Growing community of inventors

Alessandria, Italy

Valeriy Kapelyushko