Patents by Inventor Hyung M. Lee

Hyung M. Lee 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).

  • Process for the preparation of a highly water absorptive resin from acrylic resin, epoxy crosslinker and hydrophilic silicate
    Patent number: 5032628
    Abstract: A method for the production of a highly water absorptive resin comprises the steps of neutralizing acrylic acid with alkali metal hydroxide to form an alkali metal acrylate; mixing the alkali metal acrylate, methacrylic acid, a polymerization initiator, and a first crosslinking agent; suspending and dispersing the mixture in an aqueous medium to for an initial mixture; polymerizing the initial mixture to produce a polymerized intermediate, and separating the moisture from the polymerized intermediate by azeotropic distillation to reduce the water content to 15-35% by weight; adding a second crosslinking agent, said second crosslinking agent having two epoxy radicals; and mixing "Syloid" of silicate, to form a highly water absorptive resin.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: July 16, 1991
    Assignee: Lucky, Ltd.
    Inventors: Su B. Choi, Hyung M. Lee