Patents Examined by J. T. Smith
  • Adhesive polymer
    Patent number: 5124422
    Abstract: Improved adhesive polymers based on monovinylidene aromatic and conjugated diene monomers (e.g. styrene and butadiene) are prepared using a hydroxyalkyl (meth)acrylate monomer and itaconic acid to provide improved combinations of shear strength and tack. Itaconic acid is used in the range of 0.5 to 5 percent by weight and the hydroxyalkyl (meth)acrylate in the range of 1.5 to 17 weight percent. Hydroxyethyl acrylate is a preferred hydroxyalkyl (meth)acrylate compound.
    Type: Grant
    Filed: June 17, 1988
    Date of Patent: June 23, 1992
    Assignee: The Dow Chemical Company
    Inventors: Robert W. Rance, Etienne R. D. A. Lazarus