Patents Assigned to Unitech Chemical Inc.
  • Cutting of high surface-tack hot melt adhesives
    Patent number: 4247502
    Abstract: High surface-tack hot melt adhesives, when coated with certain powders, can be cut into small pieces with little difficulty after extrusion onto a cooling belt.
    Type: Grant
    Filed: July 3, 1979
    Date of Patent: January 27, 1981
    Assignee: Unitech Chemical Inc.
    Inventor: Carl C. Loechell
  • Hot melt adhesive having both high peel and tensile shear strength
    Patent number: 4129607
    Abstract: Blends of certain block copolymers and epoxy resins, which have superior thermoplastic adhesive properties are disclosed. The blends are prepared by mixing hydroxy-terminated poly(ester/ether) block copolymers with epoxy resins. These unreacted blends are useful as hot melt thermoplastic adhesives having very high peel strength, high tensile shear strength, creep resistance at elevated temperatures, and good viscosity stability.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: December 12, 1978
    Assignee: Unitech Chemical Inc.
    Inventors: John H. Kooi, Ralph M. Schure, John M. Brown
  • Rerefining of used motor oils
    Patent number: 4101414
    Abstract: Screened and drained used lubricating oil stock is predistilled in a steam stripping still for about 4 hours or more. The thus predistilled used oil then flows to an evaporator for a vacuum distillation at a temperature below the cracking temperature of the stock, about 480.degree.-650.degree. F., to effect an evaporation of the used lubricating oil and its separation from a concentrate by-product of heavy lube hydrocarbons and additives.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: July 18, 1978
    Assignee: Unitech Chemical Inc.
    Inventors: Yang J. Kim, Belton R. Williams
  • High peel strength adhesives
    Patent number: 4093675
    Abstract: A polymeric compound having superior thermoplastic adhesive properties is disclosed. The compound is a poly(ester/ether) block copolymer which is extended with an anhydride to introduce carboxyl groups thereinto. Also disclosed are thermoset adhesives having superior properties and which are such carboxylated copolymers that have been crosslinked with a suitable resin.
    Type: Grant
    Filed: June 26, 1975
    Date of Patent: June 6, 1978
    Assignee: Unitech Chemical Inc.
    Inventors: Ralph M. Schure, John H. Kooi, John M. Brown
  • Cured epoxy resins
    Patent number: 4040994
    Abstract: Improved epoxy resins are prepared by the anhydride curing of an epoxy system containing three or more epoxy compounds, at least two of which are epoxidized fatty acid esters.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: August 9, 1977
    Assignee: Unitech Chemical Inc.
    Inventors: Morton Lewis, John F. Rohrer
  • Tail control and transfer adhesives for rolled paper products
    Patent number: 3994396
    Abstract: A novel adhesive composition for tail control of rolled paper stock, said composition including a modified starch, polyethylene resin and water. The adhesive is applied onto the paper stock so as to form a non-continuous film.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: November 30, 1976
    Assignee: Unitech Chemical Inc.
    Inventors: Raymond J. Reilly, Howard R. Adamson
  • Tail control and transfer adhesives for rolled paper products
    Patent number: 3951890
    Abstract: A novel adhesive composition for tail control of rolled paper stock, said composition including a modified starch, polyethylene resin and water. The adhesive is applied onto the paper stock so as to form a non-continuous film.
    Type: Grant
    Filed: July 22, 1974
    Date of Patent: April 20, 1976
    Assignee: Unitech Chemical Inc.
    Inventors: Raymond J. Reilly, Howard R. Adamson