Patents by Inventor Berit Simonsson

Berit Simonsson 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).

  • Initiator suspensions, their preparation and use
    Patent number: 5574200
    Abstract: A process for the preparation of an aqueous suspension of a solid free-radical forming initiator, a plant for the preparation, an initiator suspension and use of the suspension in polymerization of ethylenically unsaturated monomers. The process for the preparation of the suspension comprises the steps of:(a) heating the initiator to its melting point;(b) finely dividing the initiator in water while it is in a molten state;(c) rapid cooling so that the initiator is in a molten state for a period of time which is less than about 5 minutes.The initiator suspension has very small particles and a narrow particle size distribution whereby at least 50% by weight of the particles are smaller than 5 .mu.m and at least 90% by weight of the particles are smaller than 10 .mu.m.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: November 12, 1996
    Assignee: Akzo Nobel N.V.
    Inventors: Claes Lundin, Berit Simonsson
  • Initiator suspension, their preparation and use
    Patent number: 5403804
    Abstract: An initiator suspension for use in the suspension polymerization of ethylenically unsaturated monomers is prepared by (a) heating the initiator to its melting point; (b) finely dividing the initiator in water while it is in a molten state; and (c) rapidly cooling so that the initiator is in a molten state for a period of time which is less than about 5 minutes. The initiator suspension has very small particles and a narrow particle size distribution whereby at least 50% by weight of the particles are smaller than 5 .mu.m and at least 90% by weight of the particles are smaller than 10 .mu.m.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: April 4, 1995
    Assignee: Akzo Nobel N.V.
    Inventors: Claes Lundin, Berit Simonsson
  • Initiator suspensions, their preparation and use
    Patent number: 5270271
    Abstract: A process for the preparation of an aqueous suspension of a solid free-radical forming initiator, a plant for the preparation, an initiator suspension and use of the suspension in polymerization of ethylenically unsaturated monomers. The process for the preparation of the suspension comprises the steps of:(a) heating the initiator to its melting point;(b) finely dividing the initiator in water while it is in a molten state;(c) rapid cooling so that the initiator is in a molten state for a period of time which is less than about 5 minutes.The initiator suspension has very small particles and a narrow particle size distribution whereby at least 50% by weight of the particles are smaller than 5 .mu.m and at least 90% by weight of the particles are smaller than 10 .mu.m.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: December 14, 1993
    Assignee: Berol Nobel AB
    Inventors: Claes Lundin, Berit Simonsson