Versalis S.p.a.

Polimeri Europa S.p.a.

Ecp Enichem Polimeri S.r.l.

Enichem S.p.a

Montedipe S.r.l.

Eni S.p.a.

Montedipe

Dario Ghidoni

Antonio Ponticiello

Gian C Fasulo

Alessandra Simonelli

Italo Borghi

Alessandro Casalini

Riccardo Felisari

Anna Grazia Rossi

Francesco Anfuso

Attilio Arienti

Andrea Callaioli

Loris Zamperlin

Aldo Longo

Savino Matarrese

Giuseppe Cigna

Giovanni Regattieri

Giovanni Cuder

Francesco Pasquali

Tommaso Prando

Maria Parisi

Francesco Mori

Andrea La Piccirella

Roberto Lanfredi

Gilberto Frigerio

Chiara Cecilia Piseri

Andrea Licon

Luigi Bonetti

Andrea Castiglioni

Emilj Soncin

The present invention relates to an expandable polymeric composition comprising: a) a polymeric matrix containing vinyl aromatic polymers and/or copolymers; b) from 0.1% to 20% by weight, calculated on the polymeric matrix (a), of an athermanous agent; c) from 0.01% to 10% by weight, calculated on the polymeric matrix (a), of at least one non-polymeric brominated flame retardant additive; d) from 0.01% to 10% by weight, calculated on the polymeric matrix (a), of at least one brominated polymer containing at least 50% bromine; e) from 0.01% to 5% by weight, calculated on the polymeric matrix (a), of a synergistic flame retardant additive; f) from 1% by weight to 10% by weight of at least one blowing agent.

Expandable compositions containing aromatic vinyl polymers having self-extinguishing properties and improved processability

Expandable vinyl aromatic polymers which comprise: a matrix obtained by polymerizing 50-100% by weight of one or more vinyl aromatic monomers and 0-50% by weight of at least one copolymer izable monomer; 1-10% by weight, calculated with respect to the polymer (a), of an expanding agent englobed in the polymeric matrix; 0.05-25% by weight, calculated with respect to the polymer (a), of a filler comprising coke with a surface area, measured according to ASTM D-3037/89, ranging from 5 to 50 m/g.

Compositions of expandable vinyl aromatic polymers with an improved thermal insulation capacity, process for their preparation and expanded articles obtained therefrom

Expandable vinyl aromatic polymers comprising:

Compositions of expandable vinyl aromatic polymers with an improved thermal insulation capacity, process for their production and expanded articles obtained therefrom

The present invention relates to a process for separating natural rubber deriving from non-type plants, in the form of solid crumbs, from solutions in an organic solvent system including it, where said organic solvent system may comprise at least one nonpolar organic solvent, or a mixture of at least one nonpolar organic solvent and at least one polar organic solvent, and the concomitant removal of said organic solvent system from said rubber, where the aforementioned process comprises subjecting said solution to a stripping stage by means of water vapor, in presence of a dispersing system, separating the aforementioned crumbs of natural rubber from the liquid phase, obtained through the stripping stage, and subjecting said crumbs to drying.

Process for separating non-natural rubber in solid form from solutions including it

A mixture comprising: a) from 0% to 95% of aromatic compounds and/or polycyclic aromatic compounds, said polycyclic aromatic compounds, if present, always being in an amount less than 10% with respect to component (a); b) from 0% to 85% of a mixture containing aliphatic compounds and a content of aromatic compounds lower than 30% with respect to (b); c) from 0% to 20% of an acetate component; d) from 1% to 50% of a mixture of compounds containing keto groups; with the proviso that said solvent mixture contains at least three components, one of which is (d) and the other two selected from (a), (b) or (c) and that their sum is always 00%; and with the proviso that said mixture has a solubility, measured with the Hansen parameters, characterized in that the dispersion force component of the solubility &#x3b4;varies from 17 to 20 Mpathe polar force component of the solubility &#x3b4;varies from 0.65 to 5 Mpa, and the strength of the hydrogen bond component of the solubility &#x3b4;varies from 0.65 to 5 MPa.

Mixture of solvents for removing asphaltenes

The present invention relates to a polymeric composition which comprises: a) vinyl aromatic polymers and/or copolymers in an amount ranging from 50% to 99% by weight, calculated with respect to the overall composition, b) a polyolefin or a relative copolymer with an ester in an amount ranging from 1% to 50% by weight, calculated with respect to the overall composition, c) olefinic elastomer grafted with a.-vinyl aromatic polymer in an amount ranging from 0.01% to 40% by weight, calculated with respect to the sum of (a)+(b), d) an expanding agent in an amount ranging from 1% to 10% by weight, calculated with respect to the sum of (a)+(b)+(c).

Expandable polymeric composition with improved flexibility and relative preparation process

Compositions based on self-extinguishing expandable vinyl aromatic polymers in granules comprising: a. a polymeric matrix and, homogeneously englobed in the polymeric matrix, b. 3-10% by weight, calculated with respect to the polymer (a), of an expanding system; c. 0.005-5% by weight, calculated with respect to the polymer (a), of a brominated flame-retardant agent; d. 0.001-2% by weight, calculated with respect to the polymer (a), of a synergic additive; e. 0.005-5% by weight, calculated with respect to the polymer (a), of at least one stabilizing additive selected from: i. pyrophosphates of alkaline or alkaline earth metals, an ammonium group or a unit deriving from melamine; ii. melamine polyphosphate; iii. partially or completely salified polycarboxylic acids; iv. citrates of alkaline or alkaline earth metals; v. polyfunctional alcohols with 2 or more alcohol functions; vi. esters of poly-functional alcohols.

Compositions of self-extinguishing expandable vinyl aromatic (co)polymers and process for their preparation

Process for the preparation of beads of expandable vinyl aromatic polymers by means of polymerization in aqueous suspension, which comprises polymerizing at least one vinyl aromatic monomer in aqueous suspension in the presence of a peroxide initiator system, active at a temperature higher than 800 C, an expanding agent, and in the presence of: &#x2014;an amide having the general formula RCONHCH&#x2014;CHNHCOR(I) a flame retardant system comprising a brominated additive with a bromine content higher than 30% by weight.

Process for the preparation of expandable vinyl aromatic polymers with a reduced thermal conductivity by polymerization in suspension

Expandable particle composite material suitable for the preparation of expanded materials having a density lower than 40 g/l and a content of closed cells of at least 60%, including heterophase cavities and/or heterophase domains, whose matrix is a synthetic thermoplastic resin having at least 60% by weight of a vinyl aromatic polymer and in which an expanding system is contained, together with a heterogeneously distributed graphite material, having a graphitization degree, calculated by means of the Maire and Mering formula, of at least 0.2.

Composite material based on vinylaromatic polymers having enhanced thermal insulation properties and process for the preparation thereof

Process for improving the insulating capacity of expanded vinyl aromatic which includes:

Process for improving the insulating capacity of expanded vinyl aromatic polymers and the products thus obtained

Process for improving the insulating capacity of expanded vinyl aromatic which comprises:

Process or improving the insulating capacity of expanded vinyl aromatic polymers and the products thus obtained

Expandable vinylaromatic polymers which comprise: a) a matrix obtained by polymerizing 50-100% by weight of one or more vinylaromatic monomers and 0.50% by weight of a copolymerizable monomer; b) 1-10% by weight, calculated with respect to the polymer (a), of an expanding agent englobed in the polymeric matrix; c) 0.05-25% by weight, calculated with respect to the polymer (a), of an inorganic filler homogeneously distributed in the polymeric matrix with a substantially spherical granulometry, an average diameter ranging from 0.01 to 100 &#x3bc;m, a refraction index higher than 1.6 and a white index, as defined in 'Colour Index' (third edition published by the Society of Dyers and Colourists, 1982), equal to or lower than 22.

Expandable vinylaromatic polymers and process for their preparation

Process for the production of expandable particles of styrene polymers, having improved processability characteristics, which comprises:

Process for the production of expandable particles of styrene polymers

Thermoplastic compositions having improved mechanical characteristics and particularly an improved impact resistance, especially when measured on test pieces having high thickness, comprising:

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Gonzaga, Italy

Dario Ghidoni