Ausimont S.p.a.

Solvay Solexis S.p.a.

Solvay Specialty Polymers Italy S.p.a.

Ausimont S.r.l.

Daimler-benz Ag

Margherita Albano

Vincenzo Arcella

Giulio Brinati

Marco Apostolo

Milena Stanga

Stefano Arrigoni

Vito Tortelli

Giovanni Comino

Claudia Manzoni

Anna Minutillo

Ivan Diego Wlassics

Graziella Chiodini

Francesco Triulzi

Julio A Abusleme

Anna M Staccione

Enrico Marchese

Enzo Giannetti

Walter Navarrini

Matteo Fantoni

Stefano Bossolo

Francesco Maria Triulzi

Thomas Schuh

Udo Gayer

Graziell Chiodini

Claudio Pizzi

Anna Staccione

The invention pertains to a fluoroelastomer composition comprising a vinylidene-fluoride based fluoroelastomer, a polyhydroxylated compound, a basic compound, a pyridinium-type salt having an aromatic ring-quaternized nitrogen atom, and comprising at least two groups having a central carbon atom which bears acidic hydrogen atoms; and an accelerant, which possesses an improved molding behaviour, leading to shaped parts possessing less blisters and surface defects.

Fluoroelastomer composition

A peroxide curable perfluoroelastomer comprising: recurring units derived from tetrafluoroethylene (TFE); recurring units derived from perfluoroethylvinylether (EVE), in an amount of between 2 and 17% by moles, with respect to total recurring units derived from TFE, perfluoromethylvinylether (MVE) and EVE; and recurring units derived from perfluoromethylvinylether (MVE), in an amount of between 23 and 35% by moles, with respect to total recurring units derived from TFE, perfluoromethylvinylether (MVE) and EVE. A process for its manufacture and its use for the manufacture of cured articles.

Perfluoroelastomer

A peroxide curable perfluoroelastomer comprising: recurring units derived from tetrafluoroethylene (TFE); and recurring units derived from perfluoromethylvinylether (MVE); such perfluoroelastomer possessing a Mooney Viscosity (ML2+9) at 121&#xb0; C. of from 25 to 140 MU, when measured according to ASTM D1646 standard, and comprising such MVE recurring units in an amount of from 26 to 33% by moles with respect to total moles of TFE and MVE. A process for the manufacture of such perfluoroelastomer, and cured articles obtainable therefrom.

Perfluoroelastomeric gel having the following properties:

Perfluoroelastomer gels

Fluoroelastomeric gel having the following properties:

Fluoroelastomer gels

A (per)fluoroelastomeric composition curable by peroxidic way comprising for 100 phr of (per)fluoroelastomer: 

(Per)fluoroelastomeric compositions

This invention pertains to sealing articles of vulcanized (per)fluoroelastomer compositions incorporating particles of a vinylidene fluoride (VDF) polymers having a Shore A hardness of at least 85 when determined according to ASTM D 2240 Type A Durometer method, and a compression set of less than 30%, when determined according to ASTM D395 at 200&#xb0; C. for 70 h on O-ring according to ASTM D1414, and to a process for their manufacture by vulcanizing-molding and thermal post-treating at a temperature above the melting point of the VDF polymer.

Vulcanized (per) fluoroelastomer sealing articles

Extrudable (per)fluoroelastomer compositions comprising crosslinkable (per)fluoroelastomers having:

A fluoroelastomer composition comprising: The incorporation of the polymer (F) in the fluoroelastomer composition as described above enables easier processing of the fluoroelastomer composition, both in injection molding and extrusion molding technologies, yielding improved behavior in mold release, mold fouling, and aspect surface of the molded parts.

Vulcanizable fluoroelastomer compositions comprising:

Vulcanisable fluoroelastomeric compositions

A (per)fluoroelastomeric composition curable by peroxidic way comprising: 

VDF-based curable fluorelastomers, having a glass transition temperature from &#x2212;10&#xb0; C. to &#x2212;35&#xb0; C., comprising: B) monomer of formula: CF&#x2550;CFOCFOCF(a), C) one or more comonomers selected from: tetrafluoroethylene (TFE), per-fluoromethylvinylether (PMVE), perfluoropropene (HFP), and an amount of &#x2014;COF end groups in the polymer lower than the sensitivity limit of the method which uses the FT-IR spectroscopy described in the present application.

Fluoroelastomers

VDF-based curable fluoroelastomers, having a glass transition temperature lower than &#x2212;49&#xb0; C., preferably lower than &#x2212;50&#xb0; C., and having the following composition, as percent moles: A) from 25% to 50%, preferably from 30% to 45%, of the monomer of formula: CF2&#x2550;CFOCFOCF(a); B) one or more (per)fluorinated comonomers having at least one unsaturation of ethylene type in amounts from 75% to 50%; preferably from 70% to 55%; said one or more comonomers comprising vinylidene fluoride (VDF) in amounts from 50% to 75% on the total of the monomer moles; the sum of the molar percentages of the monomers being 100%; said fluoroelastomers containing an amount of &#x2014;COF end groups in the polymer lower than the sensitivity limit of the method reported in the description.

VDF curable fluoroelastomers, ionically cured, having a compression set after a time of 24 h (ASTM D 39/B) at &#x2212;10&#xb0; C. lower than 60%, preferably lower than 50% and at &#x2212;25&#xb0; C. lower than 90%, preferably lower than 75%, comprising hexafluoropropene (HFP) in amounts higher than 10% by moles and one vinylether of formula: CF&#x2550;CFOCFOCF(a), an amount of &#x2014;COF and groups in the polymer lower than the sensitivity limit of the method using the FT-IR spectroscopy described in the present application.

Growing community of inventors

Milan, Italy

Margherita Albano