Patents by Inventor Leo L. Valdiserri

Leo L. Valdiserri 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).

  • Organic phosphite ester compositions containing hindered piperdinyl light stabilizers
    Patent number: 5342978
    Abstract: Hydrolytically stabilized phosphite compositions are provided. The compositions contain an organic phosphite ester antioxidant and a hindered piperidinyl light stabilizer. The hindered piperidinyl component is not only a light stabilizer but also functions to hydrolitically stabilize the organic phosphite antioxidant. The compositions are useful as stabilizer additives to polymeric compositions.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: August 30, 1994
    Assignee: General Electric Company
    Inventors: William P. Enlow, Leo L. Valdiserri
  • Stabilization composition for clear, impact-modified PVC
    Patent number: 4614756
    Abstract: A composition comprising a dioctyl tin mercaptide, a zinc salt of a fatty acid such as zinc stearate and a conventional phosphite ester stabilizer is effective in stabilizing PVC resins. The stabilized resins exhibit excellent initial color and stability under processing conditions.
    Type: Grant
    Filed: August 1, 1985
    Date of Patent: September 30, 1986
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Leo L. Valdiserri
  • Process for preparing phosphite-isocyanurates oligomers
    Patent number: 4546180
    Abstract: A process for preparing certain phosphite-isocyanurate oligomers. The process requires the reaction of a trishydroxyalkyl isocyanurate with a tris-organophosphite and, optionally, an alcohol or alkylphenol. The process is promoted by an alkaline catalyst such as sodium methoxide. The oligomeric product is useful as a thermal stabilizer in polymer compositions.
    Type: Grant
    Filed: April 19, 1983
    Date of Patent: October 8, 1985
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Leo L. Valdiserri, Richard P. Woodbury
  • Oligomeric aromatic polyphosphites
    Patent number: 4413077
    Abstract: Aromatic, phenol-free polyphosphites containing at least two pentaerythritol residues and three bis-phenolic residues. They are effective polymer additives and are especially useful in enhancing the thermal stability of polypropylene.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: November 1, 1983
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Leo L. Valdiserri, Ingenuin Hechenbleikner
  • Light-stable polyolefins
    Patent number: 4413078
    Abstract: An olefin polymer composition having improved stability to deterioration resulting from exposure to ultraviolet radiation. The enhanced stability results from the effective presence of a combination of an organic phosphite ester and a hydroxybenzophenone.
    Type: Grant
    Filed: May 7, 1982
    Date of Patent: November 1, 1983
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Elyse B. Lewis, Leo L. Valdiserri
  • Light-stable polyolefins
    Patent number: 4410650
    Abstract: An olefin polymer composition containing an ultraviolet light stabilizer. The ultraviolet light stabilizer is a zerovalent nickel complex the organic portion of which is an ester of pentaerythritol phosphite.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: October 18, 1983
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Elyse M. Lewis, Leo L. Valdiserri
  • Phosphite-isocyanurate oligomers
    Patent number: 4376857
    Abstract: Certain phosphite-isocyanurate oligomers and their use as thermal stabilizers in polymer compositions. The phosphite-isocyanurates may be prepared from a tris-hydroxyalkyl isocyanurate by reaction with an organic phosphite such as triphenyl phosphite or tributyl phosphite. Optionally, an alcohol such as decyl alcohol may be employed as a reactant.
    Type: Grant
    Filed: September 3, 1981
    Date of Patent: March 15, 1983
    Assignee: Borg-Warner Corporation
    Inventors: Leo L. Valdiserri, Richard P. Woodbury
  • Light-stable polypropylene compositions
    Patent number: 4331585
    Abstract: Light-stable polypropylene fibers containing a combination of a hindered piperidinyl compound and a pentaerythritol polyphosphite.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: May 25, 1982
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Leo L. Valdiserri, Elyse M. Bullock
  • Polyolefins stabilized with cyclic diphosphites
    Patent number: 4305866
    Abstract: A process for the preparation of mixed aromatic-aliphatic phosphites. The process involves the reaction of an alkylphenol with diphenyl-(or a lower dialkyl-) pentaerythritol diphosphite. The process is simple and inexpensive, and produces a relatively pure product.
    Type: Grant
    Filed: August 30, 1979
    Date of Patent: December 15, 1981
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: James F. York, Leo L. Valdiserri
  • Stabilized olefin polymers
    Patent number: 4302383
    Abstract: An olefin polymer composition containing a cyclic, hindered amine in combination with an organic phosphite ester. The composition is relatively stable in the presence of ultraviolet light.
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: November 24, 1981
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Leo L. Valdiserri, Elyse M. Bullock
  • Phosphite-isocyanurates
    Patent number: 4287339
    Abstract: This invention of the present application relates to the stabilizing component in the stabilization of olefin polymers, especially polypropylene during processing, i.e., at elevated temperatures. The stabilizing component is a phosphite-isocyanurate compound having the structural formula: ##STR1## wherein R is a hydrocarbon radical and R.sup.1 is methyl or hydrogen.
    Type: Grant
    Filed: February 29, 1980
    Date of Patent: September 1, 1981
    Assignee: Borg-Warner Corporation
    Inventor: Leo L. Valdiserri
  • Stabilized polyolefins
    Patent number: 4206111
    Abstract: An ultraviolet stabilizer for olefin polymers. It is a combination of a 2-hydroxyphenylbenzotriazole, a dialkyl pentaerythritol diphosphite and a phenolic ester oxidation inhibitor.
    Type: Grant
    Filed: August 10, 1978
    Date of Patent: June 3, 1980
    Assignee: Borg-Warner Corporation
    Inventors: Leo L. Valdiserri, Elyse M. Bullock
  • Flame-retardant phosphonate compositions
    Patent number: 4154721
    Abstract: Flame-retardant polymer compositions containing a pentaerythritol diphosphonate and a halogenated organic compound having at least about 30% halogen. Dimethyl pentaerythritol disphosphonate, i.e., ##STR1## is a preferred ingredient of the composition, as is polypropylene.
    Type: Grant
    Filed: September 21, 1976
    Date of Patent: May 15, 1979
    Assignee: Borg-Warner Corporation
    Inventors: Leo L. Valdiserri, Murray S. Cohen
  • Olefin polymers stable to copper
    Patent number: 4130540
    Abstract: Stabilization of olefin polymers against deterioration in the presence of copper. The stabilization is accomplished by means of a small proportion of a bis-phosphoramidate having the structure ##STR1## where the R's are inert, organic groups.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: December 19, 1978
    Assignee: Borg-Warner Corporation
    Inventors: Leo L. Valdiserri, Elyse M. Bullock
  • Process for curing olefin polymers
    Patent number: 3974132
    Abstract: Heat-curable ethylene polymer compositions wherein triallyl phosphate is used as a coagent. The composition also contains an organic peroxide catalyst.
    Type: Grant
    Filed: May 15, 1975
    Date of Patent: August 10, 1976
    Assignee: Borg-Warner Corporation
    Inventor: Leo L. Valdiserri