Patents by Inventor Rajnikant P. Shah

Rajnikant P. Shah 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).

  • Automotive undercoat coating compositions containing reactive urea/urethane compounds
    Patent number: 5977245
    Abstract: Low VOC automotive sealer compositions containing reactive urea/urethane compounds are disclosed. Sealers and tintable sealers utilyzing the reactive urea/urethane compounds have improved physical properties with a faster dry times without sacrificing other desirable properties. These compositions are found to be useful for automotive refinish according to this invention.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: November 2, 1999
    Assignee: BASF Corporation
    Inventors: Rajnikant P. Shah, Sudhakar Dantiki, Stewart Shepler
  • Aldimine based coating compositions and pigment dispersions
    Patent number: 5973097
    Abstract: The present invention relates to a coating composition and a pigment dispersant comprising aldimine having the formula ##STR1## wherein R.sub.1 is alkyl, aryl, cycloaliphatic or substituted alkyl, aryl, cycloaliphatic or heterocyclic group, and R.sub.2 is monomeric or polymeric aliphatic, aromatic, arylaliphatic or cycloaliphatic group which may contain O, N, S, or Si.The coating composition further comprises:b) an isocyanate compound having ubetdione functionality,c) at least one moisture absorbing compound, andd) acid catalyst,wherein the coating composition demonstrates increased pot life and decreased dry time.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: October 26, 1999
    Assignee: BASF Corporation
    Inventors: Sudakhar Dantiki, David W. Braun, Rajnikant P. Shah, Bradley M. Richards, Thomas J. Laginess, Henry J. Stateczny, Brian P. Koevenig
  • Coating composition based on amines, aldimines and isocyanates
    Patent number: 5661216
    Abstract: A coating composition based on amines, aldimines and isocyanates which forms a polyurea coating or film. These coating compositions are especially useful in the automotive refinish industry due to the cure rate at ambient conditions. The coatings of these compositions can be useful for obtaining low VOC (Volatile Organic Content) levels.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: August 26, 1997
    Assignee: BASF Corporation
    Inventors: Thomas J. Laginess, Sudhakar Dantiki, Brian P. Koevenig, Rajnikant P. Shah
  • Non-isocyanate basecoat/clearcoat coating compositions which may be ambient cured
    Patent number: 5578675
    Abstract: Improved basecoat--clearcoat paint coating compositions which may be ambient cured are disclosed. The coating compositions comprise:1) a hydroxyl functional coreactant,2) at least one anhydride functional coreactant and,3) a carbodiimide compound.The improved compositions cure at a rate especially useful as refinish paint compositions.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: November 26, 1996
    Assignee: BASF Corporation
    Inventors: Patrick J. Mormile, Rajnikant P. Shah, Anthony J. Tye