Patents by Inventor S. Andries R. Sebastian

S. Andries R. Sebastian 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).

  • Aqueous processible photosensitive compositions containing core shell microgels
    Patent number: 5075192
    Abstract: The present invention concerns an aqueous processible solid photosensitive composition for relief printing plates comprising(a) an addition photopolymerizable ethylenically unsaturated monomer;(b) a photoinitiator or photoinitiating system activated by actinic light; and(c) a core shell microgel binder;wherein the core shell microgel binder has two domains, a core having less than 10% crosslinking and an aqueous processible non-crosslinked outer shell consisting of an acid-modified copolymer, and further wherein the monomer partitions in the shell of the microgel and the shell is grafted to the core using at least 0.1% of a grafting agent.The invention also concerns a photosensitive element containing this composition.
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: December 24, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael Fryd, Ernst Leberzammer, S. Andries R. Sebastian
  • Aqueous processible photosensitive compositions containing core shell microgels
    Patent number: 4956252
    Abstract: The present invention concerns an aqueous processible solid photosensitive composition for making relief plates comprising(a) an addition photopolymerizable ethylenically unsaturated monomer;(b) a photoinitiator or photoinitiating system activated by actinic light; and(c) a core shell microgel binder; wherein the core shell microgel binder has two domains, a core having less than 10% crosslinking and an aqueous processible non-crosslinked outer shell consisting of an acid-modified copolymer, and further wherein the monomer partitions in the shell of the microgel. The invention also concerns a photosensitive element containing this composition.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: September 11, 1990
    Assignee: E. I. duPont de Nemours and Company
    Inventors: Michael Fryd, Ernst Leberzammer, S. Andries R. Sebastian