Abstract: Isobutene is copolymerized with an unsaturated comonomer containing the chlorosilanic function, and the chlorosilanic function is subsequently transformed into an alkoxysilanic function by means of a reaction of alcoholysis, thus silylated copolymers of isobutene being obtained, which are crosslinkable under ambient conditions, suitable for use in sealants and paints.

Abstract: Siliconic compounds, stabilizer for organic polymers, containing in their molecule the aromatic phosphite or phosphonite function and the sterically hindered aminic function, are obtained by making a 2,2,6,6-tetramethyl-piperidinyl-4-oxyalkylene-.gamma.-alkyl-di(alkyloxy)si lane, an aliphatic glycol, an aromatic phosphite, phosphonite or diphosphite and possibly an aliphatic mono-hydroxy alcohol interact with each other.

Abstract: Fluid compositions capable of crosslinking in ambient humidity to form elastomeric products are disclosed, comprising:(A) an elastomeric aliphatic polycarbonate;(B) an organic compound containing at least two N.dbd.C< groups, selected from bisketimines, bisketiminoenamines and bisketiminosilazanes;(C) a tertiary amine with stress nitrogen bonded to a ketiminic carbon atom, preferably a bicyclic ketimine.

Abstract: An organosiliconic fluid composition, suitable for use in sealants, formed by a liquid phase and by a solid and insoluble polymeric phase, dispersed in said liquid phase, is obtained by polymerizing, under the influence of free-radical initiators, styrene, or a mixture of styrene with at least one other vinyl-containing monomer, the polymerization being carried out in the presence of a liquid polyoxypropylenediol-.alpha.,.omega.-bis-allyl silylate having formula (I): ##STR1## or in the presence of a liquid polycarbonate of polyoxypropylenediol-.alpha.,.omega.-bis-allyl silylate having formula (II): ##STR2## wherein: R is an alkyl radical,X is a hydrolyzable radical selected from alkoxy, aminooxy and acyloxy radicals,y is 0, 1 or 2,p is a number ranging from about 10 to about 100,m and n are numbers such as to give to compounds (I) and (II) a molecular weight value, or an average molecular weight value, of from 2000 to 20,000.

Abstract: Adhesion promoters for metal substrates for paints cross-linkable with U.V. or E.B. radiations or with peroxides of general formula: ##STR1## (wherein R, m and n have the meaning which we will specify in the disclosure), obtained by means of the reaction of glycidyl acrylate and/or glycidyl methacrylate with dihydrophosphonoacetic acid.

Abstract: Reactive stabilizing compounds, able to stabilize organic polymers, contain in their molecule a sterically hindered amino group and a hydrolyzable silyl function.In stabilizing organic polymers, said reactive stabilizing compounds can be hydrolyzed at the silyl function with the formation of silanol groups, which are made to interact in order to form complex resinous stabilizing structures. These latter are added in stabilizing quantities to the polymer to be stabilized.According to one particular embodiment, the hydrolysis at the silyl function and the formation of the resinous structure take place spontaneously within the polymer to be stabilized.According to a further embodiment, the reactive stabilizing compound is added to the polymer after being stably supported on a solid support by reaction with an inorganic solid having surface hydroxyl groups.

Abstract: Isobutylene copolymers, cross-linkable under ambient humidity conditions, characterized by the presence of pendant functions containing a silyl radical, are prepared by a process comprising the preliminary formation of new copolymers of isobutylene with a triene containing a system of two conjugate double bonds in position 1,3 and at least one other double bond of vinyl type, followed by the silylation of the polymers thus produced by means of a silicon derivative chosen from those of formula (I) or (II): ##STR1##

Abstract: For preparing polyoxyalkylenediol-.alpha.,.omega.-bisallyl policarbonates, diallyl carbonate is reacted in a first reaction stage with a polyoxyalkylenediol having a mol wt between 400 and 4500 in the presence of a transesterification catalyst at a temperature in the neighborhood of 100.degree. C. and under reduced pressures, whereafter, in a second reaction stage, the product as obtained from the first stage is treated at a temperature between 70.degree. C. and 150.degree. C. under reduced pressures, still in the presence of a transesterification catalyst. By so doing, the chain extension of the bisallyl carbonate of the polyoxyalkylenediol is achieved, whereas the unreacted diallyl carbonate coming from the first stage, and that produced in the second stage, are eliminated, and the final reaction product can thus be collected.

Abstract: Alkoxides of transition metals, selected from among tetravalent Ti, tetravalent and pentavalent V, tetravalent Cr and tetravalent Zr, actinides and lanthanides, are reduced to corresponding alkoxides of lower valency by reacting such higher valency metal alkoxides, in liquid phase, with vapors of metals of the alkaline earth group, the III group and the IV group metals and magnesium. Very efficient polymerization catalysts for the polymerization of unsaturated compounds are thus obtained.

Abstract: Novel salt-like compounds adapted to be used as component of catalytic systems in the polymerization of ethylenically unsaturated monomers are disclosed: these compounds are obtained by reacting halides of transition metals or of aluminium with halides of alkaline earth metals, in the presence of phosphorous oxide derivatives which have the function of solvating agents. Also oxyhalides of transition metals lie within the scope of the invention.

Abstract: For the polymerization of ethylene, as such or with one or more alpha-olefines, a novel catalyst composition is suggested, which has a high yield of polymer per weight unit of catalyst. Such compositions are prepared from a titanium compound in which the valency of Ti is 3 or more, said compound being reacted with the vapors of one or more metals of the group consisting of Al, Cr, Mn, V, Ti, Zr, Mo, Zn and Ca in the presence of a halogen donor which is preferably an organic halide, certain inorganic halides being capable of being used provided that the halide metal has at least two degrees of valency. The composition is used in association with an aluminium hydrocarbyl halide. Yields as high as 30,000 grams of polymer per gram of elemental Ti can be obtained.

Abstract: An alpha-olefin such as ethylene is polymerized in the presence of a catalyst system consisting of (1) an alkyl-halide, alkyl-derivative or hydride of a metal belonging to one of the first three groups of the periodic system and (2) the combination product of a transition metal chloride and titanium trichloride, supported on a previously chlorinated material such as chlorinated .alpha.-alumina having a high superficial area.

Abstract: An alpha-olefin such as ethylene is polymerized in the presence of a catalyst system consisting of (1) an alkyl-halide, alkyl-derivative or hydride of a metal belonging to one of the first three groups of the periodic system and (2) the combination product of a transition metal chloride and titanium trichloride, supported on a previously chlorinated material such as chlorinated .gamma.-alumina having a high superficial area.

Abstract: For the polymerization of ethylene, as such or with one or more alpha-olefins, a novel catalyst composition is described, which gives a high yield of polymer per weight unit of catalyst. Such compositions are prepared from a titanium compound in which the valency of Ti is 3 or more, said compound being reacted with the vapors of one or more metals of the group consisting of Al, Cr, Mn, V, Ti, Zr, Mo, Zn and Ca in the presence of a halogen donor which is preferably an organic halide, certain inorganic halides being capable of being used provided that the halide metal has at least two degrees of valency. The composition is used in association with an aluminium hydrocarbyl halide. Yields as high as 30,000 grams of polymer per gram of elemental Ti can be obtained.

Abstract: A novel catalyst system for the polymerization or copolymerization as the case may be, of alpha-olefines is disclosed, which comprises a cocatalyst which is an aluminum-organic compound and a catalyst proper which is obtained by reacting metal vapors (such as vapors of Mg, Al, Ti, V, Cr, Mn, Fe or their alloys) with Ti or V compounds, a halogen donor and a hydrocarbonaceous inert diluent being possibly present. Another aspect of the invention is the conduct of the polymerization, or copolymerization, run proper. Numerous examples of practical application of the catalyst preparation and use are given and the advantages of the novel approach shown.

Abstract: An alpha-olefin such as ethylene is polymerized in the presence of a catalyst system consisting of (1) an alkyl-halide, alkyl-derivative or hydride of a metal belonging to one of the first three groups of the periodic system and (a) the combination product of a transition metal chloride and titanium trichloride said transition metal chloride being derived from the reaction of a transition metal carbonyl and titanium tetrachloride.

Abstract: Ethylene is polymerized through the use of an improved catalyst system consisting of a carrier such as neodymium oxide having a high superficial area, an aluminum compound such as triisobutylaluminum and the combination product of titanium trichloride and an isostructural chloride of another transition metal prepared by impregnating the carrier with a solution of a carbonyl derivative of the other transition metal, refluxing the impregnated carrier with titanium tetrachloride until that carbonyl derivative is converted to the chloride of the other transition metal, and then removing the excess of titanium tetrachloride.

Abstract: New three-component metathesis catalysts prepaed from a tungsten compound, an organic ligand and an organometallic compound of a metal belonging to Group I to IV of the Mendelyeev Periodic System are disclosed. More particularly, the disclosed catalysts are prepared from a tungsten oxychloride, an organic ligand containing a nitrile or ester group, and an organic aluminum compound.