Patents by Inventor Walter T. Murphy

Walter T. Murphy 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).

  • Thermoplastic polyurethanes having improved binder properties for magnetic media recording
    Patent number: 4988574
    Abstract: A magnetic recording tape, as for audio apparatus, video apparatus, or computers, has a binder containing magnetic particles therein bonding the magnetic particles to the substrate. The binder comprises the reaction product of a polyisocyanate and a blend of a hydroxyl terminated polyester intermediate and a derivative of a bis-phenol A chain extender having the formula ##STR1## where R.sup.1 and R.sup.2, independently, is an alkylene having from 2 to 4 carbon atoms, with 2 carbon atoms, that is, ethylene, being preferred.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: January 29, 1991
    Assignee: The B. F. Goodrich Company
    Inventors: Walter T. Murphy, Hsiungto S. Tseng, Edmond G. Kolycheck
  • Electron curable polyurethanes
    Patent number: 4762902
    Abstract: Electron beam curable polyurethanes that have significantly improved dispersibility, improved magnetic pigment binder utility and result in improved magnetic tape for use in a variety of applications. This is accomplished by providing an oligomeric polyurethane that contains pendant carboxyl groups along the backbone chain.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: August 9, 1988
    Assignee: The B. F. Goodrich Company
    Inventor: Walter T. Murphy
  • Process for treating hydroxyl terminated liquid polymers
    Patent number: 4442039
    Abstract: Hydroxyl terminated liquid polymers that are excessively active in reaction with organic diisocyanates may be deactivated by treating the hydroxyl terminated liquid polymer with phosphoric acid or sulfuric acid prior to reaction with the organic diisocyanate so that the hydroxyl terminated liquid polymer is adjusted to an acid number of at least about 6 but not greater than 12. The treated hydroxyl terminated liquid polymer can be used to prepare polyurethanes having improved low temperature properties flexibility and hydrolytic stability.
    Type: Grant
    Filed: May 6, 1982
    Date of Patent: April 10, 1984
    Assignee: The B. F. Goodrich Company
    Inventors: Walter T. Murphy, Clifford D. Guiley, Jr.
  • Stabilized hydroxyl terminated reactive liquid polymers
    Patent number: 4405817
    Abstract: Shelf stability of hydroxyl terminated liquid polymers is vastly improved by mixing a strong inorganic or organic acid, therewith in order to adjust acid number thereof up to about 12. Amount of the acid used is less than 1% by weight of the liquid polymer.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: September 20, 1983
    Assignee: The B. F. Goodrich Company
    Inventors: Walter T. Murphy, Clifford D. Guiley, Jr.
  • Antifouling polyurethanes
    Patent number: 4329277
    Abstract: Polyurethane formulations that are resistant to fouling by marine organisms when exposed to sea water are prepared by mixing tetrachloroisophthalonitrile with a polyurethane. Any of the known polyurethanes may be used and liquid castable compositions are particularly useful.
    Type: Grant
    Filed: October 3, 1980
    Date of Patent: May 11, 1982
    Assignee: The B. F. Goodrich Company
    Inventor: Walter T. Murphy
  • Curable thixotropic epoxy/amine terminated liquid polymer compositions
    Patent number: 4320047
    Abstract: A curable thixotropic composition comprising an amine terminated liquid polymer and a novel combination of fumed silica and a mildly alkaline particulate substance in sufficient amount to accelerate gel time of the composition.
    Type: Grant
    Filed: November 13, 1980
    Date of Patent: March 16, 1982
    Assignee: The B. F. Goodrich Company
    Inventors: Walter T. Murphy, Clifford D. Guiley, Jr.
  • Rotocasting process for producing rubbery reinforced articles
    Patent number: 4258917
    Abstract: A process is provided for making reinforced rubbery sport and play balls by rotational casting, in a mold lined with a nonwoven fabric, a liquid polymer composition containing an epoxy resin, a liquid carboxyl-terminated polymer, an amine, a dihydric compound, and a plasticizer. The sections of nonwoven fabric in the mold are preshrunk and sealed together by means of an amine-terminated liquid polymer. The resultant sport and play balls have good dimensional stability and the desired flex and tear properties.
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: March 31, 1981
    Assignee: The B. F. Goodrich Company
    Inventor: Walter T. Murphy