Patents by Inventor Rainer Spittka

Rainer Spittka 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).

  • Coatings based on thermoplastic polyesters with addition of an unsaturated polyester as additive resin
    Patent number: 6143841
    Abstract: A coating formulation comprises (A) a base polyester consisting of the copolymerization product of at least one aliphatic, cycloaliphatic and/or aromatic polybasic acid and/or anhydride thereof or at least one hydroxycarboxylic acid or derivative thereof and at least one diol, and (B) an additive polyester resin prepared by condensing at least one unsaturated dicarboxylic acid and optionally at least one saturated dicarboxylic acid monomer with at least one diol and/or triol, wherein the proportion of unsaturated additive polyester to base polyester ranges from 0.1-15 parts to 99.9-85 parts.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: November 7, 2000
    Assignee: Huels Aktiengesellschaft
    Inventors: Rainer Spittka, Hans-Dieter Zagefka, Dirk Hoppe
  • Adhesion-promoting additive for coatings based on thermoplastic polyesters
    Patent number: 6028162
    Abstract: An epoxy resin-free coating system based on thermoplastic polyesters into which a polyester is incorporated as adhesion-promoting additive, which polyester is non-toxic.
    Type: Grant
    Filed: August 20, 1998
    Date of Patent: February 22, 2000
    Assignee: Huels Aktiengesellschaft
    Inventors: Siegfried Hahn, Rainer Spittka