Patents by Inventor Heert Andringa

Heert Andringa 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).

  • Photoactivatable water borne coating composition
    Patent number: 6987135
    Abstract: Photoactivatable water born coating composition comprising a) a (meth)acryloyl-functional polyurethane dispersion, with the (meth)acryloyl-functional polyurethane comprising 5 to 18 wt. % of alkylene oxide groups while the (meth)acryloyl functionality is in the range of 2 to 40, and b) a UV-initiator. Preferably, the (meth)acryloyl-functional polyurethane comprises 8 to 18 wt. % of alkylene oxide groups. More preferably, the coating composition comprises a reactive diluent.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: January 17, 2006
    Assignee: Akzo Nobel N.V.
    Inventors: Keimpe Jan Van Den Berg, Arie Noomen, Frederik Rous, Ignace Damiaan Christiaan Rood, Heert Andringa, Klaas Jan Hendrik Kruithof, Ann Kerstin Birgitta Lindell Kjellqvist
  • Photoactivatable water borne coating composition
    Publication number: 20020156145
    Abstract: Photoactivatable water born coating composition comprising
    Type: Application
    Filed: October 25, 2001
    Publication date: October 24, 2002
    Inventors: Keimpe Jan Van Den Berg, Arie Noomen, Frederik Rous, Ignace Damiaan Christiaan Rood, Heert Andringa, Klaas Jan Hendrik Kruithof, Ann Kerstin Birgitta Lindell Kjellqvist
  • Coating composition comprising a reactive diluent
    Publication number: 20020122947
    Abstract: Coating composition comprising one or more compounds having functional groups which are reactive to olefinically unsaturated bonds, and a citraconimide functional compound, e.g., benzyl citraconimide, octyl citraconimide, or methoxy propyl citraconimide and/or an itaconimide functional compound as a reactive diluent. The reactive diluents are particularly suitable for use in oxidatively drying coating compositions, such as alkyd based coatings, or coating compositions which are curable by radical copolymerization.
    Type: Application
    Filed: October 18, 2001
    Publication date: September 5, 2002
    Inventors: Keimpe Van Den Berg, Frederik Rous, Robert Paul Klaasen, Heert Andringa, Huig Klinkenberg, Berend Hoving
  • Process of preparing 2-alkyl-2,3-dihydro-1H-benz ?e!indene-1-one derivatives
    Patent number: 5942636
    Abstract: The invention relates to a process of preparing a 2-alkyl-2,3-dihydro-1H-benz?e!indene-1-one derivative, preferably 2,3-dihydro-2-methyl-benz?e!indene-1-one, characterized in that a naphthalene derivative is condensed with an active ester of 2-alkyl-2-propenoic acid, preferably with 2-methyl-2-propenoyl chloride. The product which is obtained in high yield and substantially free from its isomer is an intermediate in the preparation of rac-dimethyl bis(2-alkyl-1H-benz?e!indenyl)silandiyl zirconium dichloride complex.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: August 24, 1999
    Assignee: Akzo Nobel N.V.
    Inventors: Richard Herman Woudenberg, Heert Andringa