Patents Assigned to Cellutech, LLC
  • Composition board binding material
    Patent number: 6291558
    Abstract: This invention features a graft copolymer of lignosulfonates reacted with an unsaturated carbonyl compound and an aldehyde, in two separate reaction steps. The resin can be used as a substitute for a majority of pure urea formaldehyde resin in the manufacture of composite board products. The resin can also be introduced directly into the urea formaldehyde resin production process.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: September 18, 2001
    Assignee: Cellutech, LLC
    Inventors: Mikhail Raskin, Lazar O. Ioffe, Azariy Z. Pukis, Martin H. Wolf