Patents by Inventor Guglielmo Bertolini

Guglielmo Bertolini has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5026675
    Abstract: A catalyst active in the polymerization of ethylene or the copolymerization of ethylene with unsaturated monomers consists of a nickel complex catalyst bonded to a polystyrene substrate, and definable by the general formula (I): ##STR1## where R, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 have the meanings given in the description.The preparation is described of the catalyst and its use in the polymerization of ethylene and the copolymerization of ethylene with other unsaturated monomers.
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: June 25, 1991
    Assignee: Eniricerche S.p.A.
    Inventors: Giuseppe Braca, Alessandro Ricci, Glauco Sbrana, Maurizio Brunelli, Aldo Giusti, Guglielmo Bertolini, Anna M. R. Galletii
  • Patent number: 4980477
    Abstract: Sterically hindered amino compounds definable by the general formula (I): ##STR1## where R represents a hydrogen atom, a C.sub.1 -C.sub.18 alkyl radical or a C.sub.7 -C.sub.18 alkaryl radical, are useful as organic polymer stabilizers. Processes for preparing these compounds are described.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: December 25, 1990
    Assignees: Eniricerche SpA, Enichem Synthesis SpA
    Inventors: Arnaldo Roggero, Guglielmo Bertolini
  • Patent number: 4853440
    Abstract: Polymeric stabilizer compounds are formed by an organic polymeric matrix, of paraffinic character, deriving from a hydrogenated polydiene and bearing bonded at at least one chain end a sterically hindered aminic function.Such polymeric stabilizer compounds are obtained by means of a process, which provides:(a) the polymerization of a diene, by the technique of the living polymers, under the influence of alkyl metal-alkyl or alkyl metal-aryl catalysts, to yield a polydiene bearing on its chain end a terminal metal atom;(b) the reaction of said metal-bearing polydiene with a sterically hindered aminic compound, bearing in its molecule an electrophilic group, in particular a carbonyl group, reactive towards said metal of the metal-bearing polydiene;(c) the catalytic hydrogenation of the polydiene bearing said sterically hindered aminic function at its chain end.The so-obtained compounds are particularly useful in the stabilization of polypropylene towards the U.V. light degrading action.
    Type: Grant
    Filed: June 2, 1987
    Date of Patent: August 1, 1989
    Assignees: Eniricerche, S.p.A., Enichem Sintesi, S.p.A.
    Inventors: Arnaldo Roggero, Guglielmo Bertolini
  • Patent number: 4833211
    Abstract: Solid polymeric stabilizer compound containing the hydroxybenzophenone function, having the general formula (I): ##STR1## wherein: m=from 0.01 to 0.99 (preferably from 0.1 to 0.6);l=from 0.99 to 0.01 (preferably from 0.9 to 0.4):m+l=1;R=H, --OH, --OR" (R"+(C.sub.1 -C.sub.20)-alkyl; aryl, alkylaryl cycloalkyl). halogen, (C.sub.1 -C.sub.20)-alkyl, cycloalkyl;R'=H, (C.sub.1 -C.sub.20)-alkyl, cycloalkyl.Also the process for preparing said solid polymeric stabilizers and the stabilized polymeric compositions comprising at least an organic polymer and a stabilizing amount of said solid polymeric stabilizers are disclosed.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: May 23, 1989
    Assignees: Eniricherche S.p.A., Enichem Sintesi S.p.A.
    Inventors: Arnaldo Roggero, Mario Clerici, Guglielmo Bertolini
  • Patent number: 4797451
    Abstract: Solid polymeric stabilizer compounds are disclosed comprising an organic polymeric matrix, to which are linked groups containing a sterically hindered aminic function, the organic polymeric matrix being a polymeric matrix of a vinyl-aromatic, aromatic with heteroatoms, dienic or olefinic polymer, containing hydrogen atoms replaceable by metal atoms, the groups containing the sterically hindered aminic function replacing, at least partially, said replaceable-by-metal hydrogen atoms of the matrix.Also disclosed are processes for the preparation of said solid polymeric stabilizers and stabilized polymeric compositions comprising an organic polymer and a stabilizing amount of said solid polymeric stabilizers.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: January 10, 1989
    Assignee: Eniricerche S.p.A.
    Inventors: Arnaldo Roggero, Guglielmo Bertolini, Carlo Busetto
  • Patent number: 4524187
    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##
    Type: Grant
    Filed: December 9, 1982
    Date of Patent: June 18, 1985
    Assignees: Anic S.p.A., Dow Corning Corporation
    Inventors: Alberto Greco, Guglielmo Bertolini, Omero Zavattini
  • Patent number: 4518766
    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.
    Type: Grant
    Filed: February 3, 1984
    Date of Patent: May 21, 1985
    Assignee: Enichimica Secondaria, S.p.A.
    Inventors: Alberto Greco, Guglielmo Bertolini
  • Patent number: 4333881
    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.
    Type: Grant
    Filed: February 25, 1980
    Date of Patent: June 8, 1982
    Assignees: Anic S.p.A., Snamprogetti S.p.A.
    Inventors: Alberto Greco, Guglielmo Bertolini
  • Patent number: 4304729
    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.
    Type: Grant
    Filed: January 4, 1980
    Date of Patent: December 8, 1981
    Assignees: Anic S.p.A., Snamprogetti, S.p.A.
    Inventors: Alberto Greco, Guglielmo Bertolini, Gianfranco Pazienza
  • Patent number: 4284526
    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.
    Type: Grant
    Filed: May 12, 1980
    Date of Patent: August 18, 1981
    Assignee: Snamprogetti S.p.A.
    Inventors: Sebastiano Cesca, Alberto Greco, Guglielmo Bertolini, Mario Bruzzone
  • Patent number: 4239873
    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.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: December 16, 1980
    Assignee: Snamprogetti
    Inventors: Sebastiano Cesca, Alberto Greco, Guglielmo Bertolini, Mario Bruzzone
  • Patent number: 4151110
    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.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: April 24, 1979
    Assignee: Snamprogetti S.p.A.
    Inventors: Sebastiano Cesca, Alberto Greco, Guglielmo Bertolini, Mario Bruzzone
  • Patent number: 4037041
    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.
    Type: Grant
    Filed: March 27, 1975
    Date of Patent: July 19, 1977
    Assignee: Snam Progetti, S.p.A.
    Inventors: Sebastiano Cesca, Alberto Greco, Guglielmo Bertolini, Mario Bruzzone