Patents by Inventor Robert E. Karabetsos

Robert E. Karabetsos 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).

  • Polyol blends of low TG and high TG acrylic copolymers
    Patent number: 5098956
    Abstract: A polyol blend, comprising a low-Tg high-hydroxyl number acrylic copolymer and a high-Tg low-hydroxyl number acrylic copolymer, is disclosed. The low-Tg and high-Tg acrylic copolymers each comprise a hydroxyalkyl acrylate or methacrylate, and a non-hydroxy moiety-containing alkyl methacrylate. The low-Tg copolymer has a hydroxyl number of about 112 to about 187, a number-average molecular weight of about 1500 to about 6000, a polydispersity value of no greater than about 5, and a Tg of about -10.degree. to about 20.degree. C. The high-Tg copolymer has a hydroxyl number of about 35 to about 112, a number-average molecular weight of about 2000 to about 8000, a polydispersity value of no greater than about 5, and a Tg of about 25.degree. to about 100.degree. C. Also disclosed are coating compositions comprising the polyol blend.
    Type: Grant
    Filed: November 14, 1990
    Date of Patent: March 24, 1992
    Assignee: S.C. Johnson & Son, Inc.
    Inventors: John E. Blasko, Robert E. Karabetsos, Douglas B. Rahrig
  • Polyol blends of low Tg and high Tg acrylic copolymers
    Patent number: 5098952
    Abstract: A polyol blend, comprising a low-Tg high-hydroxyl number acrylic copolymer and a high-Tg low-hydroxyl number acrylic copolymer, is disclosed. The low-Tg and high-Tg acrylic copolymers each comprise a hydroxyalkyl acrylate or methacrylate, and a non-hydroxy moiety-containing alkyl methacrylate. The low-Tg copolymer has a hydroxyl number of about 112 to about 187, a number-average molecular weight of about 1500 to about 6000, a polydispersity value of no greater than about 5, and a Tg of about -10.degree. to about 20.degree. C. The high-Tg copolymer has a hydroxyl number of about 35 to about 112, a number-average molecular weight of about 2000 to about 8000, a polydispersity value of no greater than about 5, and a Tg of about 25.degree. to about 100.degree. C. Also disclosed are coating compositions comprising the polyol blend.
    Type: Grant
    Filed: November 14, 1990
    Date of Patent: March 24, 1992
    Assignee: S. C. Johnson & Son, Inc.
    Inventors: John E. Blasko, Robert E. Karabetsos, Douglas B. Rahrig