Patents by Inventor Steven Richard Rapacki

Steven Richard Rapacki 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).

  • Impact-modified poly(vinyl chloride) exhibiting improved low-temperature fusion
    Patent number: 6031047
    Abstract: Poly(vinyl chloride), when impact modified with a core/shell acrylic impact modifier whose shell is predominantly formed from 50-90 parts of polymerized units of methyl methacrylate and 10-50 parts of polymeric units of a C.sub.2 -C.sub.8 alkyl acrylate and whose core is a crosslinked copolymer mainly of polymeric units of butyl acrylate, exhibits improved fusion behavior, allowing conversion to an intimate, fused, processable blend at lower temperatures and faster rates, than when the shell of the impact modifier is substantially formed from methyl methacrylate alone.
    Type: Grant
    Filed: December 30, 1997
    Date of Patent: February 29, 2000
    Assignee: Rohm and Haas Company
    Inventors: Jean Marie Brady, Steven Richard Rapacki