Patents by Inventor Silvestro Costanzi
Silvestro Costanzi 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).
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Patent number: 8178607Abstract: The present invention relates to a thermoplastic composition comprising at least aluminum hypophosphite (aluminum phosphinate), corresponding to the chemical formula Al(H2PO2)3 as halogen-free flame retardant agent, and at least a polymer based on polyamide. The flame retarded halogen-free thermoplastic molding compositions according to the invention is used to produce articles based on polyamide polymers with or without glass fiber reinforcement, which are flame retarded.Type: GrantFiled: January 7, 2004Date of Patent: May 15, 2012Assignee: Italmatch Chemicals S.p.A.Inventors: Silvestro Costanzi, Maurizio Leonardi
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Patent number: 7700680Abstract: The present invention relates to halogen-free flame retarded thermoplastic moulding compositions based on a polyester resin, a process for their preparation and halogen-free flame retarded corresponding articles. The composition according to the invention comprises at least from 0.1 to 30% by weight of aluminium hypophosphite as halogen free flame retardant additive, in case in addition to a mixture of other halogen free flame retardant additives and at least from 5 to 95% by weight of a polymer based on polyester, particularly a linear polyester resin.Type: GrantFiled: June 10, 2004Date of Patent: April 20, 2010Assignee: Italmatch Chemicals S.p.A.Inventors: Silvestro Costanzi, Maurizio Leonardi
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Patent number: 7619022Abstract: The present invention provides flame retardant thermoplastic moulding compositions comprising: A) from 65% to 99.5% by weight (with respect of the total weight of the final composition) of a polyolefinic polymer particularly selected among polypropylene polymers; B) from 0.1% to 30% by weight (with respect of the total weight of the final composition) of a synergic mixture of an hypophosphorous acid metal salt and halogenated organic compounds; C) from 0.5% to 10% by weight (with respect of the total weight of the final composition) of a plurality of selected additives consisting of processing aids, heat and process stabilizers, UV stabilizers, antidripping agents (PTFE—Polytetrafluoroethylene), pigments, mould releasing agents, nucleating agents; D) from 0% to 50% by weight (with respect of the total weight of the final composition) of an inorganic filler. The total of the percentages by weight of components A to D is 100%.Type: GrantFiled: July 22, 2005Date of Patent: November 17, 2009Assignee: Italmatch Chemicals S.p.A.Inventor: Silvestro Costanzi
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Patent number: 7608654Abstract: The present invention relates to a thermoplastic halogen-free flame retardant composition comprising at least an hypophosphorous acid metal salts as halogen-free flame retardant agent, and at least an aromatic polycarbonate s resin and/or its blends. The flame retardant composition may in addition comprise additives and fillers. The invention also refers to moulded thermoplastic articles made by using the flame retardant composition.Type: GrantFiled: November 7, 2003Date of Patent: October 27, 2009Assignee: Italamatch Chemicals S.p.A.Inventors: Silvestro Costanzi, Maurizio Leonardi
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Publication number: 20080214715Abstract: The present invention provides flame retardant thermoplastic moulding compositions comprising: A) from 65% to 99.5% by weight (with respect of the total weight of the final composition) of a polyolefinic polymer particularly selected among polypropylene polymers; B) from 0.1% to 30% by weight (with respect of the total weight of the final composition) of a synergic mixture of an hypophosphorous acid metal salt and halogenated organic compounds; C) from 0.5% to 10% by weight (with respect of the total weight of the final composition) of a plurality of selected additives consisting of processing aids, heat and process stabilisers, UV stabilisers, antidripping agents (PTFE—Polytetrafluoroethylene), pigments, mould releasing agents, nucleating agents; D) from 0% to 50% by weight (with respect of the total weight of the final composition) of an inorganic filler. The total of the percentages by weight of components A to D is 100%.Type: ApplicationFiled: July 22, 2005Publication date: September 4, 2008Applicant: ITALMATCH CHEMICALS S.P.A.Inventor: Silvestro Costanzi
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Publication number: 20080090950Abstract: The present invention relates to halogen-free flame retarded thermoplastic moulding compositions based on a polyester resin, a process for their preparation and halogen-free flame retarded corresponding articles. The composition according to the invention comprises at least from 0,1 to 30% by weight of aluminium hypophosphite as halogen free flame retardant additive, in case in addition to a mixture of other halogen free flame retardant additives and at least from 5 to 95% by weight of a polymer based on polyester, particularly a linear polyester resin.Type: ApplicationFiled: June 10, 2004Publication date: April 17, 2008Applicant: Italmatch ChemicalsInventors: Silvestro Costanzi, Maurizio Leonardi
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Publication number: 20080033079Abstract: The present invention relates to a thermoplastic composition comprising at least aluminium hypophosphite (aluminium phosphinate), corresponding to the chemical formula Al(H2PO2)3 as halogen-free flame retardant agent, and at least a polymer based on polyamide. The flame retarded halogen-free thermoplastic moulding compositions according to the invention is used to produce articles based on polyamide polymers with or without glass fiber reinforcement, which are flame retarded.Type: ApplicationFiled: January 7, 2004Publication date: February 7, 2008Applicant: ITALMATCH CHEMICALS S.p.A.Inventors: Silvestro Costanzi, Maurizio Leonardi
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Publication number: 20070082995Abstract: The present invention relates to a thermoplastic halogen-free flame retardant composition comprising at least an hypophosphorous acid metal salts as halogen-free flame retardant agent, and at least an aromatic polycarbonate s resin and/or its blends. The flame retardant composition may in addition comprise additives and fillers. The invention also refers to moulded thermoplastic articles made by using the flame retardant composition.Type: ApplicationFiled: November 7, 2003Publication date: April 12, 2007Applicant: ITALMATCH CHEMICALS S.P.A.Inventors: Silvestro Costanzi, Maurizio Leonardi
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Patent number: 6180011Abstract: A method for removing hydrocarbon products from water surfaces, which entails contacting the hydrocarbon products with a crystalline polypropylene, which when observed under a microscope of 2500 magnetization, exhibits a spongy surface having relatively homogeneous intercommunicating pores, with dimensions of between about 3 &mgr;m and 20 &mgr;m in diameter.Type: GrantFiled: June 16, 1997Date of Patent: January 30, 2001Assignee: Enichem Synthesis S.p.AInventors: Carlo Neri, Silvestro Costanzi, Franco Groppelli
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Patent number: 6056897Abstract: Solid form of a stabilizer for organic polymers consisting of one or more tocopherols, as such or in formulation, absorbed on porous polypropylene with a high crystallinity, in a quantity ranging from 30% to 85% by weight. The above tocopherols, as such or in formulation, can also be used in a mixture with other stabilizers such as, for example, secondary antioxidants containing phosphorous or sulfur, sterically hindered phenols and sterically hindered amines.Type: GrantFiled: February 18, 1998Date of Patent: May 2, 2000Assignee: Great Lakes Chemical (Europe) GmbHInventors: Luciano Pallini, Silvestro Costanzi, Carlo Neri, Francesco Groppelli
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Patent number: 5462984Abstract: Solid stabilizers for polymers comprises a blend of (a) organic polymer and (b) at least one silicon-containing compound having a sterically hindered amine group in the molecule in quantities of between 40% and 50% by weight of the final solid blend.Type: GrantFiled: February 24, 1995Date of Patent: October 31, 1995Assignee: Enichem Synthesis S.p.A.Inventors: Carlo Neri, Silvestro Costanzi, Mariangela Angaroni
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Patent number: 5350786Abstract: Stabilizers for organic polymers, consisting of one or more compounds of the classis of the sterically hindered amines (HALS) are directly added to the reaction mixture during the (co)polymerization of the .alpha.-olefins or of their mixtures with other unsaturated monomers.The so-obtained polymeric compositions result perfectly stabilized and show a thermo- and photo-oxidative resistance higher than that of the same polymeric compositions to which the same stabilizers are added by a traditional route.Type: GrantFiled: March 4, 1993Date of Patent: September 27, 1994Assignee: Enichem Synthesis S.p.A.Inventors: Silvestro Costanzi, Damiano Gussoni, Luciano Pallini
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Patent number: 5270470Abstract: A process is disclosed for the synthesis of 4-allyloxy-2,2,6,6-tetraalkylpiperidinic derivatives by starting from the corresponding 2,2,6,6-tetraaLkyLpiperidinols and from an allyl halide, characterized in that the reaction is made to take place in the absence of water, and in the presence of a finely subdivided allyl-metal hydroxide and of small amounts of a phase-transfer catalyst. The products, which are thus obtained with yields higher than 90%, are useful a stabilizers for polymers or as intermediates for such products.Type: GrantFiled: February 16, 1990Date of Patent: December 14, 1993Assignee: Enichem Sintesi S.p.A.Inventors: Silvestro Costanzi, Luciano Pallini, Damiano Gussoni
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Patent number: 5218116Abstract: Procedure for the preparation of nitroxyl radicals of sterically hindered amines, consisting of the reaction of amines with hydrogen peroxide in the presence of a titanium containing catalyst, particularly in the presence of titanium silicalites.The catalyst can be recovered at the end of the reaction and recycled.Type: GrantFiled: November 29, 1991Date of Patent: June 8, 1993Assignee: Enichem Synthesis S.p.A.Inventors: Carlo Neri, Silvestro Costanzi, Rosa M. Riva, Mariangela Angaroni
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Patent number: 5216103Abstract: Polymeric stabilizers having a polysiloxanic structure contain reactive groups which can be linked to the polymeric structure to be stabilized and sterically hindered piperidinic groups. These polymeric stabilizers are particularly suitable for the stabilization of organic polymers against U.V. radiation and heat, when it is required for them not to be extracted by solvents, fats or soaps.Type: GrantFiled: October 10, 1991Date of Patent: June 1, 1993Assignee: Enichem Synthesis S.p.A.Inventors: Silvestro Costanzi, Carlo Neri, Rossella Farris
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Patent number: 5158998Abstract: Acrylic or alkyd resin and polyester based covering or coating compositions are stabilized against the action of light and moisture by adding, possibly in the presence of conventional stabilizers and antioxidants, at least one compound containing at least one N-substituted, sterically hindered piperidino, morpholino or pyrrolidino group, and at least one silyl function, or a polymer structure with a polyorganosiloxane structure containing sterically hindered piperidino groups in the molecule.Type: GrantFiled: March 18, 1991Date of Patent: October 27, 1992Assignee: Enichem Synthesis S.p.A.Inventors: Carlo Neri, Francesco Gratani, Gianluigi Landoni, Silvestro Costanzi
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Patent number: 5051458Abstract: Polymeric stabilizer compounds with a polyorganosiloxane structure suitable for stabilizing organic polymers against UV radiation and heat, containing sterically hindered piperidino groups in their molecule and easily prepared in well defined, predetermined structures.Type: GrantFiled: May 17, 1989Date of Patent: September 24, 1991Assignee: Enichem Synthesis S.p.A.Inventors: Silvestro Costanzi, Luigi Cassar, Carlo Bosetto, Carlo Neri, Damiano Gussoni
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Patent number: 4946880Abstract: Reactive stabilizer compounds, to be used in the stabilization of organic polymers, contain a sterically hindered, N-substituted piperidinic, morpholinic or pyrrolidinic group, and at least a hydrolysable silicic function.Such compounds give rise, by hydrolysis of the silicic function, to complex resinous structures endowed with stabilizing properties.The reactive stabilizer compounds can spontaneously hydrolyse inside the polymer, or they can be stably supported on a solid support, or they can be chemically linked to the polymeric chain to be stabilized.Type: GrantFiled: October 5, 1987Date of Patent: August 7, 1990Assignee: Enichem Synthesis S.p.A.Inventors: Silvestro Costanzi, Damiano Gussoni, Omero Zavattini, deceased, by Clara Pungiluppi, heir, by Renato Zavattini, heir, Luciano Pallini
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Patent number: 4935063Abstract: Stabilizing inorganic fillers or pigments having simultaneous reinforcing effect and stabilizing effect on organic polymers are obtained by a process comprising the following stages:(a) bringing the inorganic filler or pigment into contact with a solution, in an inert organic solvent, of a sterically hindered amine comprising one or more alkoxysilane groups in its molecule;(b) maintaining the obtained mixture at higher than ambient temperature (20.degree.-25.degree. C.) for a period of at least 0.5 hours;(c) removing the solvent, treating at a temperature of 120.degree.-200.degree. C. and recovering the stabilizing filler or pigment obtained.Type: GrantFiled: September 9, 1988Date of Patent: June 19, 1990Assignee: Enichem Synthesis S.p.A.Inventors: Silvestro Costanzi, Omero Zavattini, deceased, Ugo Bersellini, Damiano Gussoni
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Patent number: 4898946Abstract: A process is described for the preparation of N-allyl-2,2,6,6-tetraalkyl-piperidine derivatives which involves reaction of the corresponding 2,2,6,6-tetraalkyl-piperidine with an allylic carbonate in the presence of palladium catalysts. The products which are thus obtained are useful as polymer stabilizers and chemical intermediates.Type: GrantFiled: June 3, 1987Date of Patent: February 6, 1990Assignee: Enichem Synthesis S.p.A.Inventors: Silvestro Costanzi, Damiano Gussoni, Luciano Pallini