Patents Represented by Attorney, Agent or Law Firm Charles A. Cross
  • Isocyanates blocked with 1-amino-alkyl imidazoles as epoxy curing agents
    Patent number: 4797455
    Abstract: Novel curing agents for heat-curable single package epoxy resins, the agents being adducts of aminoalkyl imidazoles with isocyanates. Cures are effected on heating the epoxy resin for times as short as 5 seconds.
    Type: Grant
    Filed: August 6, 1987
    Date of Patent: January 10, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Shiow-Ching Lin, Ping-Lin Kuo
  • Reaction product of O-epoxyalkylated tetrakis(hydroxyphenyl)ethane resin and phenol with product having no remaining epoxy groups
    Patent number: 4785062
    Abstract: This invention is directed to the reaction product of an O-epoxyalkylated tetrakis (hydroxyphenyl) alkane resin with a phenol, which is used either as an upper layer over a lower layer of a diazo resin in a bi-layer system or as a homogeneous mixture with a diazo resin in a mono-layer system to provide a water-developable, negative-working, lithographic printing plate.
    Type: Grant
    Filed: July 31, 1984
    Date of Patent: November 15, 1988
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Alan R. Browne