Patents Represented by Attorney Joseph Shekleton

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  • Process for preparing pentaerythritol phosphate
    Patent number: 4454064
    Abstract: A process involving the reaction of pentaerythritol with phosphorus oxychloride. A solvent is used in the process, but not catalyst or amine (as a hydrogen chloride acceptor) is required.
    Type: Grant
    Filed: October 29, 1982
    Date of Patent: June 12, 1984
    Assignee: Borg-Warner Corporation
    Inventors: Yuval Halpern, Ron H. Niswander
  • Zerovalent nickel phosphite complexes
    Patent number: 4450113
    Abstract: Organic zerovalent nickel complexes wherein the organic portion is derived from an ester of pentaerythritol phosphite. The complexes are believed to have a tetrahedral structure; one nickel atom is complexed with four molecules of the pentaerythritol phosphite ester. The nickel complexes are useful as polymer additives, being effective to impart improved resistance to deterioration of olefin polymers upon exposure to ultraviolet light.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: May 22, 1984
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Ingenuin Hechenbleikner, William P. Enlow, David C. Lankin
  • Asbestos-free friction materials
    Patent number: 4446203
    Abstract: An asbestos-free friction material characterized by good friction and wear properties. It comprises the combination of a binder resin, copper oxide, antimony sulfide and an aromatic polyamide resin. Barytes is also a valuable additive in the combination.
    Type: Grant
    Filed: March 21, 1983
    Date of Patent: May 1, 1984
    Assignee: Borg-Warner Corporation
    Inventors: Howard S. Okubo, Clarence E. Albertson, Roger K. Nibert
  • 5,5-Bis-(Bromomethyl)-2-hydroxy-2-oxo-1,3,2-dioxaphosphorinanes and process for preparing same
    Patent number: 4424172
    Abstract: A process for preparing 5,5-bis(halomethyl)-2-hydroxy-2-oxo-1,3,2-dioxaphosphorinanes by hydrolysis of the corresponding phosphoryl chloride. The product is effective, in small proportions, to impart flame-retardant properties to polymer compositions, especially polypropylene and styrenic polymers.
    Type: Grant
    Filed: July 2, 1981
    Date of Patent: January 3, 1984
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • 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
  • Oxidation of alkyl phosphonous dichlorides
    Patent number: 4411842
    Abstract: A method for converting methylphosphonous dichlorides to methyl phosphonic dichlorides.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: October 25, 1983
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Ingenuin Hechenbleikner, William P. Enlow
  • 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
  • Asbestos-free friction material
    Patent number: 4403047
    Abstract: An asbestos-free friction material containing "soft" glass fibers. The friction material, in a clutch or brake apparatus, is characterized by unusually smooth, quiet, vibrationless operation.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: September 6, 1983
    Assignee: Borg-Warner Corporation
    Inventor: Clarence C. Albertson
  • Stabilized olefin polymers
    Patent number: 4403053
    Abstract: An ultraviolet stabilizer for olefin polymers. It is a combination of a 2-hydroxyphenylbenzotriazole, a bis-(dialkylphenyl)pentaerythritol diphosphite.
    Type: Grant
    Filed: May 7, 1982
    Date of Patent: September 6, 1983
    Assignee: Borg-Warner Corporation
    Inventor: Elyse B. Lewis
  • Phosphite stabilizers for polyester resins
    Patent number: 4385145
    Abstract: Poly(alkylene terephthalate) compositions containing a stabilizing proportion of a pentaerythritol diphosphite ester. The compositions are relatively stable under usual processing conditions which include high temperatures. Color formation, molecular degradation and acetaldehyde contamination are inhibited significantly.
    Type: Grant
    Filed: November 18, 1981
    Date of Patent: May 24, 1983
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: William E. Horn, Jr.
  • 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
  • Flame-retardant polymer compositions containing metal or amine salts
    Patent number: 4365033
    Abstract: Polymer compositions containing minor proportions of polyvalent metal or amine salts of 5,5-bis-(bromomethyl)-2-hydroxy-2-oxo-1,3,2-dioxaphosphorinane. Aluminum, calcium and melamine salts are preferred.
    Type: Grant
    Filed: July 2, 1981
    Date of Patent: December 21, 1982
    Assignee: Borg-Warner Corporation
    Inventors: Yuval Halpern, Donna M. Mott
  • Flame-retardant polymer compositions
    Patent number: 4361664
    Abstract: Polymer compositions containing minor proportions of a 5,5-bis-(halomethyl)-2-hydroxy-2-oxo-1,3,2-dioxaphosphorinane. The halo atom may be either chlorine or bromine.
    Type: Grant
    Filed: July 2, 1981
    Date of Patent: November 30, 1982
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • Compatible polystyrene blends
    Patent number: 4361675
    Abstract: A blend of polystyrene, a block copolymer of styrene and certain conjugated diolefins, and a graft copolymer of styrene, acrylonitrile, and butadiene. Methyl methacrylate may be substituted for all or a portion of the acrylonitrile. The blend retains the good qualities of the individual polymers and is characterized by a stable compatibility.
    Type: Grant
    Filed: March 2, 1981
    Date of Patent: November 30, 1982
    Assignee: Borg-Warner Corporation
    Inventors: King-Han Tan, Jan L. de Greef
  • 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
  • Fiberizable glass
    Patent number: 4303446
    Abstract: A lead-free, fiberizable glass composition. The glass is characterized by a relatively low hardness rating and is accordingly useful in preparing friction surfaces. Its composition includes, on a weight basis, from about 45% to about 75% of silicon dioxide, from about 15% to about 30% of potassium oxide and from about 2% to about 10% of magnesium oxide.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: December 1, 1981
    Assignee: Borg-Warner Corporation
    Inventors: William C. LaCourse, Terence J. Clark
  • 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
  • Encapsulated phosphites
    Patent number: 4299885
    Abstract: An improved polymer additive characterized by excellent stability to hydrolysis. Dialkyl pentaerythritol diphosphites are encapsulated in a petroleum or ester wax and thereby rendered relatively immune to decomposition under ordinary conditions of storage. At the same time, the wax coating is sufficiently low melting as to present no problem during milling operations at elevated temperatures, for example, where the heat stabilizing qualities of the dialkyl pentaerythritol diphosphite are required.
    Type: Grant
    Filed: August 24, 1979
    Date of Patent: November 10, 1981
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Ved K. Sahajpal, Jacques Delaere, Zigmunt K. Kromolicki, Mattheus R. Settels