Patents Assigned to Sinco Ricerche S.p.A.
  • Mono-or biaxially-stretched polyester resin foamed sheets and films
    Patent number: 6696146
    Abstract: Mono- or biaxially-stretched polyester resin foamed sheets and films wherein the polyester resin has a melt strength of more than 1 centinewton at 280° C., a melt viscosity of at least 1500 Pa.s at 280° C. for a shear ratio which tends to zero and a crystallization rate such that for a 10-minute heating at 120° C. the crystallinity can reach values as high as 30-35%.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: February 24, 2004
    Assignee: Sinco Ricerche S.p.A.
    Inventors: Hussein Al Ghatta, Sandro Cobror, Tonino Severini
  • Preparation of polyester resins using a masterbatch of polyaryleneamide
    Patent number: 6630542
    Abstract: Use of masterbatches of polyarylene amides in polyester resins containing from 10 to 40% by weight of polyamide resin in the preparation of mixtures of aromatic polyester rensins added with the polyamide resin at a concentration of less than 15% by weight.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: October 7, 2003
    Assignee: Sinco Ricerche S.p.A.
    Inventors: Hussain Al Ghatta, Sandro Cobror
  • Recovery of dicarboxylic aromatic acids from polyester-resin contained in articles for recycling
    Patent number: 6562877
    Abstract: A method for the recovery of dicarboxylic aromatic acids, in particular terephthalic acid, from manufactured aromatic polyester-resin articles for recycling, wherein the article, fragmented into chip form, is reacted in solution in a carboxylic acid with 2-6 carbon atoms and with a pKa from 4 to 6, preferably glacial acetic acid, in the presence of catalytic quantities of a strong acid with a pKa of less than 1, preferably aqueous hydrochloric acid or sulfuric acid, operating at temperatures from 160° to 250° C.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: May 13, 2003
    Assignee: Sinco Ricerche S.p.A.
    Inventor: Hussain Al Ghatta
  • Blow-molded foamed films of polyester resin
    Patent number: 6479562
    Abstract: A blown foamed film of polyester resin, obtained by blow-molding a foamed tubular sheet at the outlet of a foaming extruder.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: November 12, 2002
    Assignee: Sinco Ricerche S.p.A.
    Inventors: Hussein Al Ghatta, Tonino Severini
  • Stretched polyester foamed sheets and containers obtained therefrom
    Patent number: 6472035
    Abstract: Polyester resin foamed sheet, mono e biaxially stretched usable for the production of containers for beverages and foods, having a density lower than 700 kg/m3 and a crystallization rate such that, when the sheet is heated at 120° C. for 5 minutes, the crystallinity does not exceeds 15%. The aromatic polyester resin used for preparing the foamed sheet can be mixed with an aliphatic polyester resin to impart biodegradability and/or compostability to the sheet or with 1-10% by weight of a polyamide.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: October 29, 2002
    Assignee: Sinco Ricerche S.p.A.
    Inventors: Hussein Al Ghatta, Sandro Cobror, Tonino Severini
  • Process for the dimensional stabilization of containers in polyethylene terephthalate
    Patent number: 6458314
    Abstract: Treatment for the dimensional stabilization of containers in PET or COPET obtained by injection-blow molding consisting in subjecting to beat treatment during the blowing phase, preforms obtained from PET or COPET upgraded in the solid state in the presence of small quantities (0.01-0.2% by weight) of a dianhydride of an aromatic tettacarboxylic acid, preferably pyromellitic dianhydride.
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: October 1, 2002
    Assignee: Sinco Ricerche S.p.A.
    Inventor: Hussain Al Ghatta
  • Foamed polyester resins with flame retardant properties
    Patent number: 6444717
    Abstract: Flame retardant compositions comprising a polyester resin having a melt strength higher than 8 centinewton an intrinsic viscosity greater than 0.8 dl/g, suitable for the preparation of foamed cellular material and a flame retardant compound capable of not reducing below 3 Nm the torque intake of the resin in a heating test at 280° C. under nitrogen for 10 minutes in the presence of 10% by weight of the flame retardant compound.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: September 3, 2002
    Assignee: Sinco Ricerche S.p.A.
    Inventors: Hussain Al Ghatta, Arianna Giovannini, Tonino Severini
  • Recovery of dicarboxylic aromatic acids from polyester-resin contained in articles for recycling
    Publication number: 20020077500
    Abstract: A method for the recovery of dicarboxylic aromatic acids, in particular terephthalic acid, from manufactured aromatic polyester-resin articles for recycling, wherein the article, fragmented into chip form, is reacted in solution in a carboxylic acid with 2-6 carbon atoms and with a pKa from 4 to 6, preferably glacial acetic acid, in the presence of catalytic quantities of a strong acid with a pKa of less than 1, preferably aqueous hydrochloric acid or sulphuric acid, operating at temperatures from 160° to 250° C.
    Type: Application
    Filed: December 11, 2001
    Publication date: June 20, 2002
    Applicant: Sinco Ricerche S.p.A.
    Inventor: Hussain Al Ghatta
  • Polyester resin foamed sheets
    Patent number: 6365249
    Abstract: Polyester resin foamed sheet, usable for the production of containers for beverages and foods, having a density lower than 700 kg/m3 and crystallization rate such that, when the material is heated at 120° C. for 5 minutes, the crystallinity does not reach values higher than 15%. The aromatic polyester resin used for preparing the foamed sheet can be mixed with an aliphatic polyester resin to impart biodegradability and/or compostability to the sheet.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: April 2, 2002
    Assignee: Sinco Ricerche S.p.A.
    Inventors: Hussein Al Ghatta, Guido Ghisolfi
  • Polyester resin blends with high-level gas barrier properties
    Patent number: 6346307
    Abstract: Compositions comprising a polyester resin and a polyamide derived from a dicarboxylic acid with 6-22 carbon atoms and from m-xylylene diamine having high-level gas barrier properties, obtained by mixing in the melted state the polyester resin premixed with a dianhydride of a tetracarboxylic acid and the polyamide, operating under conditions such as to render the polymeric components theologically compatible each other. The compositions are suitable for preparing containers and biaxially-orientated films.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: February 12, 2002
    Assignee: Sinco Ricerche S.p.A.
    Inventors: Hussein Al Ghatta, Sandro Cobror, Tonino Severini
  • Preparation of polyester resins using a masterbatch of polyaryleneamide
    Publication number: 20020002251
    Abstract: Use of masterbatches of polyarylene amides in polyester resins containing from 10 to 40% by weight of polyamide resin in the preparation of mixtures of aromatic polyester rensins added with the polyamide resin at a concentration of less than 15% by weight.
    Type: Application
    Filed: June 26, 2001
    Publication date: January 3, 2002
    Applicant: Sinco Ricerche S.p.A.
    Inventors: Hussain Al Ghatta, Sandro Cobror
  • Foamed beads of polyester resin
    Patent number: 6306921
    Abstract: Foamed beads of polyester resin having rheological and crystallizability characteristics suitable for the preparation of foamed articles by sintering beads in a mold heated with superheated steam or with inert gas or air.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: October 23, 2001
    Assignee: Sinco Ricerche S.p.A.
    Inventors: Hussein Al Ghatta, Tonino Severini, Luigi Pulcini
  • Blow-molded foamed films of polyester resin
    Publication number: 20010020046
    Abstract: A blown foamed film of polyester resin, obtained by blow-molding a foamed tubular sheet at the outlet of a foaming extruder.
    Type: Application
    Filed: February 26, 2001
    Publication date: September 6, 2001
    Applicant: SINCO RICERCHE S.p.A.
    Inventors: Hussein Al Ghatta, Tonino Severini
  • Transparent articles of polyester resin
    Patent number: 6258452
    Abstract: Transparent, articles, in particular sheets, having a thickness greater than 5 mm obtained from polyalkylene terephthalate/isophthalate resin containing 5-20% of isophthalic, acid units,. characterised by an intrinsic viscosity greater than 0.8 dl/g; a melt strength at 280° C. greater than 1 cN and a melt viscosity at 280° C. greater than 2000 Pa·s for shear rates tending to zero and not less than 200 Pa·s for shear rates of 1000 sec−1.
    Type: Grant
    Filed: January 20, 2000
    Date of Patent: July 10, 2001
    Assignee: Sinco Ricerche S.p.A.
    Inventors: Hussain Al Ghatta, Enrico Ballico, Tonino Severini
  • Process for the preparation of polyester resin
    Patent number: 6143837
    Abstract: A process for the preparation of aromatic polyester resins, in which the resin obtained from the polycondensation phase in the molten state conducted by utilizing a titanium based compound as a catalyst, is subjected to a solid state polycondensation reaction in the presence of a dianhydride of a tetracarboxylic acid.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: November 7, 2000
    Assignee: Sinco Ricerche, S.p.A.
    Inventors: Hussain Al Ghatta, Enrico Ballico, Arianna Giovannini
  • Polyester resins with improved properties
    Patent number: 6057016
    Abstract: Polyester resins with a low formaldehyde content, to which an antioxidant acting as free-radical scavenger is added, containing less than 150 ppb of formaldehyde and having a formaldehyde generation rate of less than 15 ppb/min at 290.degree. C.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: May 2, 2000
    Assignee: Sinco Ricerche S.p.A.
    Inventors: Hussein Al Ghatta, Antonio Pinto
  • Flexible polyester foams
    Patent number: 6054500
    Abstract: A foamed cellular material which can be obtained from foamed aromatic polyester resins with a bulk density of 50 to 700 kg/m3 by heating in vacuum to temperatures which are higher than the Tg of the material and lower than its melting point. The foamed material, generally in the form of a sheet or panel, has high-level characteristics in terms of flexibility and dimensional thermostability depending on the degree of crystallinity after the vacuum treatment.
    Type: Grant
    Filed: December 9, 1998
    Date of Patent: April 25, 2000
    Assignee: Sinco Ricerche, S.p.A.
    Inventors: Hussain Al Ghatta, Renato Vosa, Tonino Severini, Sandro Cobror