Patents by Inventor Francesco Gratani

Francesco Gratani 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).

  • Method for stabilizing lacquers and coatings, and the stabilized compositions obtained
    Patent number: 5158998
    Abstract: 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: Grant
    Filed: March 18, 1991
    Date of Patent: October 27, 1992
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Carlo Neri, Francesco Gratani, Gianluigi Landoni, Silvestro Costanzi
  • N,N-Di-(hydroxy-phenyl) derivatives of piperazine and use thereof as stabilizers for polymers
    Patent number: 4373042
    Abstract: New N,N'-di-(hydroxy-phenyl) derivatives of piperazine are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation.A process for producing the new compounds is also disclosed, as well as the polymeric compositions stabilized with said new compounds.
    Type: Grant
    Filed: May 9, 1980
    Date of Patent: February 8, 1983
    Assignee: Montedison S.p.A.
    Inventors: Francesco Gratani, Giuseppe Nelli, Piero Di Battista, Osvaldo Cicchetti
  • Stabilizers for polymers and polymers stabilized thereby
    Patent number: 4371695
    Abstract: New N-alkyl-piperidine derivatives of hydroxy-benzyl-malonic acid are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyole fins, against sunlight, heat and oxidation.A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.
    Type: Grant
    Filed: June 3, 1981
    Date of Patent: February 1, 1983
    Assignee: Montedison S.p.A.
    Inventors: Piero Di Battista, Francesco Gratani
  • Polyesters of N,N-di-alkanol-amines with di-(hydroxy-alkyl-benzyl) malonic acids and use thereof as stabilizers for polymers
    Patent number: 4361695
    Abstract: New polyesters of N,N-di-alkanol-amines with di-(hydroxy-alkyl-benzyl) malonic acids are disclosed.The new polyesters are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation.A process for producing the new polyesters is also disclosed, as well as the polymeric compositions stabilized with said new polyesters.
    Type: Grant
    Filed: November 5, 1980
    Date of Patent: November 30, 1982
    Assignee: Montedison S.p.A.
    Inventors: Piero Di Battista, Giuseppe Nelli, Francesco Gratani
  • Stabilizers for polymers and polymers stabilized thereby
    Patent number: 4317767
    Abstract: New N-alkyl-piperidine derivatives of hydroxy-benzyl-malonic acid are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in partcular polyole fins, against sunlight, heat and oxidation.A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.
    Type: Grant
    Filed: January 30, 1980
    Date of Patent: March 2, 1982
    Assignee: Montedison S.p.A.
    Inventors: Piero Di Battista, Francesco Gratani
  • Piperidine phosphite stabilizers for polymers and polymers stabilized thereby
    Patent number: 4293466
    Abstract: New derivatives of N,N'-4-piperidyl-tetraalkyl-substituted alkylene diamines are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.
    Type: Grant
    Filed: December 5, 1978
    Date of Patent: October 6, 1981
    Assignee: Montedison S.p.A.
    Inventors: Piero Di Battista, Renzo Fontanelli, Francesco Gratani, Giuseppe Nelli
  • Stabilizers for polymers and polymers stabilized thereby
    Patent number: 4210576
    Abstract: New derivatives of N,N'-4-piperidyl-tetralkyl-substituted alkylene diamines are disclosed. These new compounds are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new compounds is also disclosed, as well as the use thereof as stabilizers of polymers and polymeric compositions.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: July 1, 1980
    Assignee: Montedison S.p.A.
    Inventors: Piero Di Battista, Renzo Fontanelli, Francesco Gratani, Giuseppe Nelli
  • Photodegradable polymeric compositions having high thermal stability containing a halogenated quinone and a transition metal compound
    Patent number: 4042764
    Abstract: Disclosed are photodegradable and thermostable polymeric compositions based on a vinyl or vinylidene polymer such as polyethylene or polypropylene, at least one compound of a transition metal which is soluble in said polymer and which has photodegrading properties with respect to the polymer and at least one halogenated p-quinoid compound.
    Type: Grant
    Filed: June 24, 1975
    Date of Patent: August 16, 1977
    Assignee: Montedison S.p.A.
    Inventors: Francesco Gratani, Marco Binaghi