Patents by Inventor Philip W. Sherwood

Philip W. Sherwood 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).

  • Azetidinedione compounds as crosslinkers for electrodeposited coatings
    Patent number: 4683302
    Abstract: Novel coating compositions are disclosed which comprise aqueous dispersions of polyamine resins in the form of their acid salts along with azetidinedione crosslinking agents and other optional adjuvants.The compositions give rise to improved methods for the electrodeposition of heat-curable films on substrates.The compositions and methods find particular utility in the cathodic deposition of coatings and films on automotive parts and household appliances.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: July 28, 1987
    Assignee: The Dow Chemical Company
    Inventors: Shenghong A. Dai, Philip W. Sherwood
  • Process for electrodeposition using azetidinedione compounds as crosslinkers
    Patent number: 4612098
    Abstract: Novel coating compositions are disclosed which comprise aqueous dispersions of polyamine resins in the form of their acid salts along with azetidinedione crosslinking agents and other optional adjuvants.The compositions give rise to improved methods for the electrodeposition of heat-curable films on substrates.The compositions and methods find particular utility in the cathodic deposition of coatings and films on automotive parts and household appliances.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: September 16, 1986
    Assignee: The Dow Chemical Company
    Inventors: Shenghong A. Dai, Philip W. Sherwood
  • Azetidinedione compounds as crosslinkers for electrodeposited coatings
    Patent number: 4576980
    Abstract: Novel coating compositions are disclosed which comprise aqueous dispersions of polyamine resins in the form of their acid salts along with azetidinedione crosslinking agents and other optional adjuvants.The compositions give rise to improved methods for the electrodeposition of heat-curable films on substrates.The compositions and methods find particular utility in the cathodic deposition of coatings and films on automotive parts and household appliances.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: March 18, 1986
    Assignee: The Dow Chemical Company
    Inventors: Shenghong A. Dai, Philip W. Sherwood
  • Compounds, compositions and process
    Patent number: 4448816
    Abstract: Described are compounds characterized by the following formula: ##STR1## wherein C.sub.n H.sub.2n is alkylene from 2 to 12 carbon atoms and C.sub.m H.sub.2m is alkylene from 2 to 20 carbon atoms. Each of the alkylene groups can, optionally, be substituted by inert substituents. The compounds contain a free isocyanato group and a masked isocyanate group, namely, the cyclic urea moiety, which, when the compounds are heated, preferably in the presence of a catalyst, opens to give the group OCN--C.sub.n H.sub.2n --. Thus, the compounds can be reacted via the free isocyanate group with active hydrogen-containing monomers or polymers to form storage stable compositions which, upon heating, are curable via reaction with the cyclic urea group.
    Type: Grant
    Filed: August 4, 1983
    Date of Patent: May 15, 1984
    Assignee: The Upjohn Company
    Inventors: Edward A. Barsa, Philip W. Sherwood