Patents by Inventor Jaap M. Akkerman

Jaap M. Akkerman 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).

  • Liquid coating composition and a process for coating a substrate with such coating composition
    Patent number: 4772680
    Abstract: The invention provides a liquid coating composition curable at ambient temperature comprising an acetoacetate groups-containing addition polymer having a number average molecular weight of 1000-100,000, a glass transition temperature of 250.degree.-370.degree. K., a hydroxyl number of 0-200 and a content of acetoacetate groups of 3,5-45% by weight, the acetoacetate groups being present as ester of hydroxyalkyl acrylate, hydroxyalkyl methacrylate or allyl alcohol structural units, and a polyamine having primary and/or secondary amino groups and blocked with an aldehyde or ketone. A process for coating a substrate with such composition is also provided.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: September 20, 1988
    Assignee: Akzo N.V.
    Inventors: Arie Noomen, Paul M. Vandevoorde, Jaap M. Akkerman
  • Liquid, 2-component coating composition curable at ambient temperature comprising a malonate compound and an unsaturated carbonyl compound, and the Michael addition product thereof
    Patent number: 4602061
    Abstract: An ambient temperature curable composition is prepared from a .alpha.,.beta.-ethylenically unsaturated carbonyl compound (such as trimethylol propane triacrylate) and a compound chosen from a particular class of compounds having an activated CH group (such as malonate group-containing oligomeric or polymeric esters). The coatings of the invention cure quickly without heating, and have excellent hardness.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: July 22, 1986
    Assignee: Akzo N.V.
    Inventor: Jaap M. Akkerman