Versalis S.p.a.

Eni S.p.a.

Attilio Arienti

Dario Ghidoni

Antonio Ponticiello

Alessandro Casalini

Aldo Longo

Alessandra Simonelli

Giuditta Vannucci

Francesco Pasquali

Chiara Cecilia Piseri

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 vinyl polymers having certain characteristics which confer flame-retardant properties to the polymer and their polymeric compositions with other vinyl polymers.

Vinyl polymers having a flame-retardant function

The present invention relates to a concentrated polymeric composition which comprises: a) vinyl aromatic polymers and/or copolymers in an amount ranging from 10% to 90% by weight, calculated with respect to the overall composition, with respect to the overall composition, b) at least one compound containing epoxy functional groups in an amount ranging from 0.01% to 5% by weight, calculated with respect to the overall composition, with respect to the overall composition, c) at least one infrared absorbing agent, in an amount ranging from 10% to 90% by weight, calculated with respect to the overall composition, with respect to the overall composition.

Concentrated polymeric compositions of vinyl aromatic polymers and/or copolymers

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.

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Mantova, Italy

Attilio Arienti