Patents by Inventor John W. Lightsey

John W. Lightsey 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).

  • Compatibilized silica and polymer silica-reinforced masterbatch containing same
    Patent number: 5985953
    Abstract: A compatibilized silica for incorporation into natural and synthetic polymers in latex form or dry blending operations is described. Said compatibilized silica is formed by the reaction of precipitated or fumed silica with organosilicon coupling compounds in aqueous suspension. Polymer-silica reinforced masterbatches are prepared by addition of the compatibilized silica slurry to natural and synthetic polymer latices. Also described is a process for preparing the compatibilized silica.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: November 16, 1999
    Assignee: DSM Copolymer, Inc.
    Inventors: John W. Lightsey, David J. Kneiling, John M. Long, Andrew C. Kolbert
  • Continuous polymerization process for producing NBR rubber having a high bound content of acrylonitrile
    Patent number: 5770660
    Abstract: An improved continuous process for the production of nitrile butadiene rubber with high bound acrylonitrile is provided wherein incremental amounts of butadiene monomer are continuously added in each of a plurality of reaction vessels to obtain a copolymer having superior environmental resistance and tensile strength properties.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: June 23, 1998
    Inventor: John W. Lightsey
  • Process for producing improved silica-reinforced masterbatch of polymers prepared in latex form
    Patent number: 5763388
    Abstract: A process for the incorporation of silica into a polymer in latex in which a silica is treated with an organo silicon compound coupling agent in aqueous suspension to form a compatibilized silica and then contacting a polymer latex with the compatibilized silica whereby the silica becomes substantially uniformly distributed throughout the latex and can be recovered when the latex is coagulated to yield little residual silica in the liquid residue from the latex. Also described is a process for preparing the compatibilized silica.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: June 9, 1998
    Assignee: DSM Copolymer, Inc.
    Inventors: John W. Lightsey, David J. Kneiling, John M. Long
  • Low temperature stable polymethylene polyphenylene polyisocyanates
    Patent number: 4937012
    Abstract: Low temperature stable polymethylene polyphenylene polyisocyanates are composed of crude polymethylene polyphenylene polyisocyanate containing from about 50 to about 80 percent by weight 2-ring diphenylmethane diisocyanate wherein from about 65 to about 93 weight percent of the 2-ring diisocyanate is 4,4'- and from about 7 to about 35 weight percent is 2,4'- and furthermore the composition contains from about 1 to about 5 weight percent carbodiimide-uretonimine structure. The polyisocyanates are useful in preparing polyurethane foams.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: June 26, 1990
    Assignee: BASF Corporation
    Inventors: Peter T. Kan, John W. Lightsey
  • Alkylated vicinal toluenediamines and their use as chain extenders in the preparation of polyurethane-polyurea elastomers
    Patent number: 4529746
    Abstract: This invention relates to alkylated vicinal toluenediamines and their use as chain extenders in the preparation of polyurethane elastomers.
    Type: Grant
    Filed: January 11, 1984
    Date of Patent: July 16, 1985
    Assignee: BASF Wyandotte Corporation
    Inventors: Robert A. Markovs, John W. Lightsey, Gerhard G. Ramlow, Peter T. Kan