Patents by Inventor Hendrik Hansma

Hendrik Hansma 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).

  • Desensitized solution of dihydroperoxycyclohexane
    Patent number: 4230889
    Abstract: 1,1-dihydroperoxycyclohexane is desensitized by dissolving it in water, an alcohol, an ester or ketoether. The solution can be handled safely. 1,1-dihydroperoxycyclohexane may be used as an initiator in polymerizing ethylenically unsaturated compounds.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: October 28, 1980
    Assignee: Akzona Incorporated
    Inventors: Hendrik Hansma, Arnold Schroeder
  • Process for the preparation of granular or pulverulent organic peroxides
    Patent number: 3966787
    Abstract: A process is disclosed for the preparation of granular or pulverulent organic peroxides which are solid at temperatures ranging from -20.degree. to 55.degree.C by solidifying the peroxide in liquid form with a liquid cooling medium which at most hardly dissolves the peroxide, which is liquid at a temperature of -20.degree.C or lower, and which is gaseous at the storage temperature of the peroxide to be solidified. An example of the liquid cooling medium is liquid nitrogen and an example of the organic peroxide is diisopropylperoxydicarbonate. The present process permits the formation of granular or pulverulent solid organic peroxides without traces of liquid peroxide which can cause safety problems.
    Type: Grant
    Filed: June 10, 1974
    Date of Patent: June 29, 1976
    Assignee: Akzo N.V.
    Inventors: Johannes DE Jager, Hendrik Hansma