Patents by Inventor Karsten Flatau

Karsten Flatau 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).

  • Polyvinyl chloride molding composition, a process for its production, and its use
    Patent number: 4563318
    Abstract: A polyvinyl chloride molding composition, suitable for the manufacture of sheet stock according to the "Luvitherm" method, consists essentially of emulsion polyvinyl chloride and 0.5-3.0% by weight of a processing aid which is a copolymer of 40-90% by weight of vinyl monomers whose corresponding homopolymers have a glass point below 0.degree. C., and of 10-60% by weight of vinyl monomers whose corresponding homopolymers have a glass transition temperature above 20.degree. C.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: January 7, 1986
    Assignee: Huels Aktiengesellschaft
    Inventor: Karsten Flatau
  • Process for the production of pourable, tack-free vinyl chloride graft polymers
    Patent number: 4451614
    Abstract: Pourable, tack-free vinyl chloride graft polymers based on ethylene-vinyl acetate copolymers and vinyl chloride, having more than 30% by weight of ethylene-vinyl acetate copolymer content, are prepared by thermally precipitating small amounts (0.5-10 wt. %) of polyvinyl chloride in the form of a latex onto the graft polymer.
    Type: Grant
    Filed: August 19, 1982
    Date of Patent: May 29, 1984
    Assignee: Chemische Werke Huels, AG
    Inventor: Karsten Flatau
  • Production of polyvinyl chloride and acrylate copolymer modifier useful for high-speed calendar manufacture of sheet stock
    Patent number: 4408015
    Abstract: Modified polyvinyl chloride is produced by suspension polymerization in the presence of monomersoluble catalysts and conventional protective colloids. After polymerization, there is added to the polymerized mixture, 0.1 to 3% by weight, based on the amount of polyvinyl chloride of the latex of a copolymer of 75-95% by weight of methyl methacrylate, 0-20% by weight of styrene, and 5-25% by weight of an acrylic acid ester of 4-8 carbon atoms in the alcohol component. Precipitation of the latex is then effected under continued agitation. Precipitation can be accomplished, for example, thermally or using coagulants. The thus-modified suspension polymer is subsequently obtained by ordinary removal by filtration and drying.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: October 4, 1983
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventor: Karsten Flatau
  • Process for preventing encrustations during the manufacture of polymers and copolymers of vinyl chloride by suspensions polymerization
    Patent number: 3995096
    Abstract: Encrustations on reactor walls and associated equipment employed in the aqueous suspension polymerization of vinyl chloride and mixtures thereof with other monomers at 30.degree.-70.degree. C. are prevented by employing in the polymerization charge 0.0005 - 0.05% by weight of hydrogen peroxide, calculated on the monomer or monomers, preferably at a pH of at least 7.5, e.g., 7.5 - 8.5 when using a suspending agent which is sensitive to hydrolysis.
    Type: Grant
    Filed: July 30, 1975
    Date of Patent: November 30, 1976
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Karsten Flatau, Lothar Hinz, Bernd Terwiesch
  • Prevention of wall deposits during polyvinyl chloride polymerizations
    Patent number: 3966695
    Abstract: The formation of polymer on the surfaces of the reactor equipment in the commercial production of polyvinyl chloride and copolymers thereof is avoided by employing equipment whose surfaces which contact the monomer are formed of substantially pure nickel.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: June 29, 1976
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Karsten Flatau, Bernd Terwiesch