Patents Assigned to Montedipe S.r.l.
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Patent number: 5622763Abstract: Containers, which are impervious to hydrocarbon vapors, in particular to fuel vapors, and comprise an outer shell of plastic material, which is coated with a polyamide layer at least on the surface in contact with the fuel.Said containers are used in the sector of the fuel industry, in particular in the automotive industry, as tanks for automobiles and motor vehicles.Type: GrantFiled: July 22, 1996Date of Patent: April 22, 1997Assignee: Montedipe S.r.l.Inventors: Annibale Vezzoli, Aldemaro Ciaperoni, Piero Furlan
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Patent number: 5567491Abstract: Containers, which are impervious to hydrocarbon vapors, in particular to fuel vapors, and comprise an outer shell of plastic material, which is coated with a polyamide layer at least on the surface in contact with the fuel.Said containers are used in the sector of the fuel industry, in particular in the automotive industry, as tanks for automobiles and motor vehicles.Type: GrantFiled: January 31, 1995Date of Patent: October 22, 1996Assignee: Montedipe S.r.l.Inventors: Annibale Vezzoli, Aldemaro Ciaperoni, Piero Furlan
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Patent number: 5338796Abstract: A thermoplastic composition having a good balance of mechanical and thermal properties, an improved impact strength and a good processability includes a functionalized polyphenylene ether, a polyamide, and an olefinic elastomer containing a vinylaromatic monomer grafted thereon.Type: GrantFiled: February 9, 1993Date of Patent: August 16, 1994Assignee: Montedipe s.r.l.Inventors: Domenico Vianello, Armando Benetton, Alessandro Moro, Roberto Pippa, Aldo Longo
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Patent number: 5278117Abstract: A supported Ziegler-Natta catalyst active in ethylene polymerization and in the copolymerization of ethylene with alpha-olefins consists of:(A) a cocatalyst in the form of an organometallic compound of aluminium, and(B) a solid catalyst component obtained by:(i) impregnating a granular solid support with a solution of a titanium alcoholate and magnesium chloride in a liquid aliphatic hydrocarbon, followed by evaporation of the hydrocarbon solvent;(ii) impregnating the support treated in (i) with a solution of magnesium chloride in a liquid aliphatic ester, followed by evaporation of the ester solvent; and(iii) activating the support treated in (ii) by contact with an alkyl aluminium halide.In a preferred embodiment, measured quantities of a silicon halide are introduced in stage (i) and/or (ii), this considerably improving catalytic activity.Type: GrantFiled: March 8, 1991Date of Patent: January 11, 1994Assignee: Montedipe S.r.l.Inventors: Luciano Luciani, Renzo Invernizzi, Francesco Masi, Maddalena Pondrelli, Mario Polesello, Italo Borghi
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Patent number: 5256722Abstract: Blends having a high molding fluidity and flowability and high thermoresistance comprising:(a) at least one vinyl-aromatic thermoplastic polymer; and(b) at least one copolyester having a melting point lower than the molding temperature of the thermoplastic polymer (a), and preferably lower than 200.degree. C., a melt viscosity, at 232.degree. C., lower than 50 Pa.S., and obtained from at least one bicarboxylic aromatic acid, at least one aliphatic bicarboxylic acid, and at least one glycol.Type: GrantFiled: August 6, 1992Date of Patent: October 26, 1993Assignee: Montedipe S.r.l.Inventors: Gianfranco Biglione, Gian Claudio Fasulo
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Patent number: 5250618Abstract: This invention relates to blends based on vinyl aromatic polymers endowed with high mechanical characteristics, even after successive processings at temperatures equal to or greater than 200.degree. C., comprising:a vinyl aromatic polymer containing from 0.5 to 5% by weight of a vinyl aromatic monomer-conjugated diene linear block polymer and from 5 to 15% by weight of a diene rubber;a polyolefine; anda vinyl aromatic monomer-conjugated diene linear block polymer, having a diene content between 20 and 80% by weight;the sum of the three components being equal to 100%.Type: GrantFiled: February 13, 1991Date of Patent: October 5, 1993Assignee: Montedipe S.r.l.Inventors: Gian C. Fasulo, Dario Ghidoni, Andrea Callaioli, Savino Matarrese
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Patent number: 5205975Abstract: A process for producing large-size formed articles consisting of a modified polyamide, by polymerization of a mixture containing, besides the omega-lactam corresponding to the polyamide, the following reagents:a) a polymerization catalyst selected from the sodium salt and the potassium salt of said omega-lactam;b) a polyoxyalkylene polyamine having a molecular weight ranging from 400 to 5,000 and an amine functionality ranging from 1.9 to 2.5;c) an activator consisting of a polyisocyanate having all the isocyanic groups blocked with a lactam;said reagents being fed, at a temperature of from 105.degree. to 125.degree. C., to a mold heated to 130.degree.-170.degree. C.Type: GrantFiled: March 30, 1990Date of Patent: April 27, 1993Assignee: Montedipe S.r.l.Inventors: Piero Furlan, Sergio Tonti, Gianpietro Talamini
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Patent number: 5198495Abstract: Blends based on vinyl-aromatic polymers endowed with high mechanical characteristics, even after successive processings at temperatures equal to or higher than 200.degree. C. and unvaried rheological properties, comprising:10 to 90% by weight of a vinyl-aromatic polymer containing from 0.5 to 5% by weight of a vinyl-aromatic monomer conjugated diene linear block copolymer and from 5 to 15% by weight of a diene rubber;5-50% by weight of a polyolefin; and5-40% by weight of a vinyl-aromatic monomer-conjugated diene star block radial copolymer, having a diene content comprised between 5 and 35% by weight; the sum of the three components being equal to 100%.Type: GrantFiled: October 2, 1990Date of Patent: March 30, 1993Assignee: Montedipe S.r.l.Inventors: Gian C. Fasulo, Dario Ghidoni, Andrea Callaioli, Andrea Licon
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Patent number: 5189000Abstract: A supported catalyst for the polymerization and copolymerization of olefinically unsaturated compounds is described, comprising an organometallic compound of aluminium and a second component obtained by bringing a titanium, vanadium or chromium compound, at least one compound of a second metal chosen from V, Al, Zr, Hf, Mo and Nd and optionally a magnesium compound into contact with a porous support consisting of microbeads of aerogels of one or more inorganic oxides distinguished by low density, high porosity and the fact that at least 90% of the pores have a diameter lying within a very narrow range of values. The process for the polymerization or copolymerization of olefinically unsaturated compounds based on the use of said catalyst is also described.Type: GrantFiled: March 21, 1991Date of Patent: February 23, 1993Assignees: Montedipe S.r.l., Enichem S.p.A.Inventors: Francesco Masi, Renzo Invernizzi, Antonio Carbonaro, Lorenzo Costa, Angelo Moalli
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Patent number: 5173465Abstract: A solid catalyst component for ethylene (co)polymerization, consisting of a particulate silica support and a catalytically active part containing titanium, magnesium, chlorine and alkoxy groups is obtained by a) preparing a solution of magnesium chloride in ethanol; b) impregnating particulate silica with said solution; c) eliminating the unabsorbed ethanol from the suspension; d) eliminating absorbed ethanol from the solid; e) interacting the resultant solid with a titanium chloride, alkoxide or chloroalkoxide; and possibly interacting with an alkylaluminium chloride. In a preferred embodiment in stage e), a silicon halide is added to improve the catalyst activity.Type: GrantFiled: June 14, 1991Date of Patent: December 22, 1992Assignee: Montedipe S.r.l.Inventors: Luciano Luciani, Maddalena Pondrelli, Renzo Invernizzi
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Patent number: 5166260Abstract: Process for the continuous bulk production of high impact vinylaromatic copolymers in which the vinylaromatic monomer, and if present, a comonomer selected from the group consisting of acrylonitrile, methacrylonitrile, acrylic acid, methacrylic acid and their alkyl- or cyclo-alkyl-esters containing from 1 to 8 carbon atoms in the alkyl group, the rubber, a part of the diluent solvent and the catalyst are premixed in a premixer at a temperature under 100.degree. C. and fed to a plug-flow agitated tubular reactor, which is divided into several stages or zones. The excess mixture is recycled to the premixer and the remaining part of the diluent solvent is injected into the top of the reactor to prevent the formation of incrustations. In the first zone of the reactor, the temperature and the residence time of the mixture are regulated so to have the halving the catalyst life.Type: GrantFiled: February 28, 1990Date of Patent: November 24, 1992Assignee: Montedipe S.r.l.Inventors: Claudio Buonerba, Savino Matarrese, Franco Balestri, Italo Borghi
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Patent number: 5098937Abstract: Flexible polyurethane foams having bulk densities within the range of from 15 to 60 kg/cm.sup.3 and a load bearing capacity, under a compression rate of 40%, higher than 50 N, obtained by the reaction of a modified polyisocyanate with a compound containing activated hydrogen atoms in chain-end position, and wherein agents different from chloro-fluoroalkanes are used as the foaming agent.Type: GrantFiled: May 17, 1990Date of Patent: March 24, 1992Assignee: Montedipe S.r.l.Inventors: Bruno Gallo, Gianflavio Lunardon
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Patent number: 5086080Abstract: Exapandable beads of blends of poly (phenylene-ether) and a vinyl aromatic polymer are prepared by carrying out the polymerization of the vinyl aromatic monomer in presence of the poly(phenylene-ether) and of an expanding agent.Type: GrantFiled: June 13, 1990Date of Patent: February 4, 1992Assignee: Montedipe S.r.l.Inventors: Francesco Anfuso, Andrea Mattiussi, Savino Matarrese, Italo Borghi
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Patent number: 5084134Abstract: A process for the devolatilization of polymer solutions including:(a) feeding the solution to a zone of indirect thermal exchange in which the ratio between the surface of thermal exchange and the flow per hour of the solution is over 80 m.sup.2 /m.sup.3 /h;(b) moving the solution forward into each channel at a speed below 0.5 mm/second;(c) keeping the solution of the polymer in each channel for about 120-200 seconds; and(d) separating the volatile components from the devolatilized polymer solution.Type: GrantFiled: January 16, 1991Date of Patent: January 28, 1992Assignee: Montedipe S.r.L.Inventors: Andrea Mattiussi, Claudio Buonerba, Franco Balestri, Dino Dall'Acqua, Savino Matarrese, Italo Borghi
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Patent number: 5017657Abstract: Rapidly-crystallizing polyester compositions comprising a polyester thermoplastic resin and a styrene polymer having an essentially syndiotactic structure.Type: GrantFiled: September 5, 1989Date of Patent: May 21, 1991Assignee: Montedipe S.r.l.Inventors: Leonardo Fiore, Italo Borghi, Andrea Mattiussi
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Patent number: 4973766Abstract: A process for recovering phenol from a rectification purge containing various organic foreign matters, which includes the steps of subjecting the purge to an extraction operation, using, as an extracting solvent, an aqueous solution of an alkali metal phenate.Type: GrantFiled: October 23, 1989Date of Patent: November 27, 1990Assignee: Montedipe S.r.l.Inventors: Renzo Penzo, Paolo Reggiani, Claudio Spaggiari