Snamprogetti

Anic S.p.a.

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Brevetti E Licenze

Aldo Priola

Sebastiano Cesca

Giuseppe Ferraris

Fiorenzo Renzi

Ugo Romano

Arnaldo Roggero

Giampaolo Giuliani

A composition based on aliphatic polycarbonates containing urethan groups and acrylic or metacrylic end groups, to be cross-linked in the presence of radicalic initiators for their functionalization with acrylic or metacrylic groups of a mixture composed of diols, polyols and their oligomeric derivatives terminated by OH groups and containing in their molecule carbonate groups and urethan groups.

Composition based on aliphatic polycarbonates which contain urethan

There is disclosed the coating of a metallic substrate with a cross-linked polymeric film by contacting the substrate with an aqueous composition containing:

Process and a composition for coating a metallic substrate with a

A method for coating various surfaces is disclosed, which comprises the step of preparing a mixture composed by at least one compound such as an epoxy-acrylic resin, a polyester alpha-omega-acrylate resin, an unsaturated polyester resin, or a urethane-acrylate resin and by at least one unsaturated compound of the amide, lactam, piperidone and urea classes and using said mixture for compounding a varnish to be applied to the selected substrate and then irradiated with an appropriate radiation (range 200 to 400 nm wavelength).

Coating method and composition

Oligomers are obtained from straight-chain alpha olefins by contacting these with a catalytic system of the binary type, which is composed of an organic metallic compound of aluminum and a haloid acid. Subsequent hydrogenation of the oligomers is carried out in order to remove possible residual unsaturations.

Method for producing oligomers from straight-chain alpha olefins,

This invention relates to the preparation of linear alpha-olefin oligomers and more particularly to the catalyst system which consists of a two component mixture comprising an aluminium halide and a compound capable of reacting with said aluminium halide and selected among

Process for the preparation of linear alpha-olefin oligomers, subsequent

A process is described whereby homopolymers and copolymers of isobutylene are prepared by effecting the polymerization at a temperature in the range of -100.degree. to 30.degree. C in the presence of a catalyst system including:

Process for the production of polymers and copolymers of isobutylene

A class of soluble polymers of high molecular weight is disclosed whose members are: copolymers of polycyclic polyenes containing two conjugated double bonds which are members of the group consisting of a) polycyclic polyenes having an endomethylenic system orthocondensed with another hydrocarbon ring wherein the two common carbon atoms form a part of a conjugated diene system whose double bonds are located inside the non-endomethylenic ring, b) polyenes presenting an alkylidene group conjugated with a double bond of a ring which forms a part of an endocyclic system, and c) orthocondensed polycyclic polyenes substituted with an alkylidene type ring whose double bond is conjugated with a double bond of one of the cycles; and homopolymers of at least one of said polycyclic polyenes with at least one other conjugated diene. They may be prepared by reacting the selected monomers in the presence of a cationic catalyst selected from the halides of metals of the second to eighth groups of the periodic system and the alkyl derivatives thereof, which may be complexed with water, alcohols, acids, ethers or alkylhalides.

High molecular weight soluble polymers starting from polycyclic polyenes

The invention relates to the preparation of oligomers starting from linear alpha-olefins and to the subsequent hydrogenation thereof to saturated oligomers products, and more particularly to the catalyst system used in the oligomer preparation reaction, the catalyst system consisting of a first component selected amongst the halogenated organo-metal aluminium components, and a second component capable of reacting with the first one and chosen amongst halogens or interhalogenic compounds and metal halides; thus higher yields of oligomers, as well as an easier performance and a control of the reaction are achieved. In turn the hydrogenation step is carried out in the presence of a known hydrogenation catalyst, at a temperature of 150 to 300.degree. C and under a pressure of from 20 to 150 atmospheres.

A method is described for the polymerization of isobutylene and, in particular, the copolymerization of isobutylene and isoprene to produce butyl rubber, by contacting the monomers with a catalyst prepared from: (a) an organoaluminum compound (e.g. Al(C.sub.2 H.sub.5).sub.2 Cl) and (b) a compound represented by the formula X'.sub.n M.sub.e Y.sub.m in which X' is a halogen atom; Y is oxygen, sulphur or a functional group selected from the alkoxies, esters, amides, simple or substituted alkyls, cycloalkyls, aromatics, arenes, phosphines, acetylacetones and oximes; Me is an element selected from Ti, Sn, Zn, B, Al, Hg, Pb, W, Sb, Ge, V, Zr, As, Bi and Mo; n and m are whole numbers whose sum equals the valence of Me except where Y is oxygen or sulphur, when the valency equals 2m + n, (e.g. Ti(O nC.sub.4 H.sub.9)Cl.sub.3), in a liquid reaction medium constituted by an aliphatic, aromatic, cycloaliphatic or halogenated hydrocarbon such as methyl chloride, and at a temperature in the range from -100.degree. to 30.degree.C.

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San Donato Milanese, Italy

Aldo Priola