Patents Assigned to Century Chemical Corporation
  • Process and product for lubricating metal prior to cold forming
    Patent number: 6376433
    Abstract: A two- or a one-step process and composition which coats metal workpiece surfaces (aluminum, copper, steel, stainless steel, etc.) with a thin lubricant film capable of allowing the metal to be deformed at room temperature. The lubricant consists essentially of polymers, dispersants, high molecular weight waxes and insoluble metallic stearates. With some ferrous surfaces, a separate coating layer is simultaneously formed (in the one-step process) or pre-formed (in the two-step process) at the metal interface, acting as a base for the lubricant. The process, after pickling in a mineral acid to remove scale and oxides, comprises the step(s) of immersing the workpiece either once or twice. The workpiece is then dried in a heated, forced air dryer.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: April 23, 2002
    Assignee: Century Chemical Corporation
    Inventor: Patrick J. Connor
  • Process and product for lubricating metal prior to cold forming
    Patent number: 5776867
    Abstract: A composition for lubricating a metal workpiece prior to cold forming consists essentially of: an aqueous alkaline stearate compound present in an amount sufficient to impart metal lubrication between about 180.degree. F. and about 320.degree. F.; an aqueous alkaline palmitate compound present in an amount sufficient to impart metal lubrication below about 160.degree. F.; an aqueous metallic stearate compound present in an amount sufficient to impart metal lubrication between about 320.degree. F. and 440.degree. F.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: July 7, 1998
    Assignee: Century Chemical Corporation
    Inventors: Gerald W. Przybylski, Patrick J. Connor, David W. Peters
  • Process and product for lubricating metal prior to cold forming
    Patent number: 5624888
    Abstract: A composition for lubricating a metal workpiece prior to cold forming consists essentially of: an aqueous alkaline stearate compound present in an amount sufficient to impart metal lubrication between about 180.degree. F. and about 320.degree. F.; an aqueous alkaline palmitate compound present in an amount sufficient to impart metal lubrication below about 160.degree. F.; an aqueous metallic stearate compound present in an amount sufficient to impart metal lubrication between about 320.degree. F. and 440.degree. F.
    Type: Grant
    Filed: September 6, 1995
    Date of Patent: April 29, 1997
    Assignee: Century Chemical Corporation
    Inventors: Gerald W. Przybylski, Patrick J. Connor, David W. Peters
  • Process and product for lubricating metal prior to cold forming
    Patent number: 5484541
    Abstract: A composition for lubricating a metal workpiece prior to cold forming consists essentially of: an aqueous alkaline stearate compound present in an amount sufficient to impart metal lubrication between about 180.degree. F. and about 320.degree. F.; an aqueous alkaline palmitate compound present in an amount sufficient to impart metal lubrication below about 160.degree. F.; an aqueous metallic stearate compound present in an amount sufficient to impart metal lubrication between about 320.degree. F. and 440.degree. F.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: January 16, 1996
    Assignee: Century Chemical Corporation
    Inventors: Gerald W. Przybylski, Patrick J. Connor, David W. Peters