Montedipe S.p.a.

Societa' Italiana Additivi Per Carburanti S.r.l.

Vedril S.p.a.

Ausimont S.r.l.

Societa' Italiana Additivi Per Carburanti

Mountedipe S.r.l.

Luciano Canova

Umberto Giannini

Enrico Albizzati

Paolo Falchi

Ettore Santoro

Antonio Alfonso Proto

Italo Borghi

Federico Milani

Enrico Dalcanale

Giorgio Giannotta

Stefanio Bonsignore

Luciano Bonoli

The filter plugging point and the pour-point at low temperatures of compositions based on liquid hydrocarbons from refining are improved by means of the addition, preferably in solution, of a mixture of an ethylene copolymer with another copolymerizable monomer and of an imidized acrylic polymer.

Compositions of liquid hydrocarbons from refining endowed with improved

The fluidity at low temperatures of compositions based on refinery liquid hydrocarbons can be improved by adding, preferably under solution, [l.sub.4 ]-methacyclophanes with substituents, obtained from the condensation reaction of a resorcin with a product containing an aldehyde group, followed by a reaction with halides of organic acids or alkyl halides.

Compositions of refinery hydrocarbons endowed with improved fluidity at

Compatible mixtures of styrene copolymers of type SAN (AES, ABS, SAN) with polyglutarimides, characterized in that the polyglutarimides are prepared by imidization of poly(meth)acrylates and/or poly(meth)acrylic acid with amides of formula

Compatible mixtures of N-aryl polyglutarimides with styrene copolymers

The fluidity at low temperatures of compositions based on liquid hydrocarbons from refining is improved by the addition, preferably in solution, of ethylene/propylene/(conjugated diene) copolymers or terpolymers, containing 20-55% of propylene, optionally degraded by thermo-oxidation, and structurally characterized by values of at least one of X.sub.2 and X.sub.4 parameters, which are equal to, or lower than, about 0.02, indicative of the absence in the polymeric chain of propylene linking inversions.

Compositions of hydrocarbons from refining, endowed with improved

Imidized acrylic polymers obtained by means of the reaction of an acrylic resin in the molten state, with at least one modifying agent having the general formula:

Imidized acrylic polymers and process for their preparation

Process for the imidization of vinyl-aromatic copolymers containing maleic anhydride, using as an imidizing agent an amide, the imidization being conducted in an anhydrous state and in the presence of a catalyst.

Process for imidizing vinyl-aromatic copolymers

The invention concerns a process for the imidization of copolymers of maleic anhydride with vinyl-aromatic monomers using an urea as the imidizing agent.

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Novara, Italy

Luciano Canova