Patents by Inventor Herbert Jenkner

Herbert Jenkner 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).

  • Polypentabromostyrene, process for the production and use
    Patent number: 4394484
    Abstract: Polypentabromostyrene with a bromine content of 76% to 80%, which is plastic at a temperature of 280.degree. C. and is thermally decomposed at a temperature of about 400.degree. C., can be produced by reacting pentabromophenylethyl bromide with an alkali metal hydroxide or carbonate in an alcoholic solvent and subsequently by catalytically initiating polymerization. The polypentabromostyrene is useful as a flame retardant for thermoplastic synthetic resins.
    Type: Grant
    Filed: July 7, 1981
    Date of Patent: July 19, 1983
    Assignee: Chemische Fabrik Kalk GmbH
    Inventors: Herbert Jenkner, Robert Strang, Peter Adermann
  • Flame retardant tetrabromophthalic acid esters useful in synthetic resins
    Patent number: 4376837
    Abstract: Tetrabromophthalic acid esters of pentabromobenzyl alcohol with a softening temperature of 270.degree.-280.degree. C. and a bromine content of about 75% by weight and of a tetrakis(bromomethyl)-o-xylylene glycol with a softening temperature of 220.degree.-230.degree. C. and a bromine content of about 67% by weight are good flame retardants for synthetic resins.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: March 15, 1983
    Assignee: Chemische Fabrik Kalk GmbH
    Inventors: Herbert Jenkner, Robert Strang
  • Flame-retardant agents for phenolic resins and process for their production
    Patent number: 4182706
    Abstract: Bromated phenylglycerin ethers, prepared by reacting a brominated phenol with 2,3-epoxypropanol-1 in the presence of an alkali at elevated temperatures, are useful flame retardant agents for phenol resins and phenolic resin laminates when used in amounts of about 3 to 30 parts by weight per 100 parts of resin.
    Type: Grant
    Filed: May 16, 1978
    Date of Patent: January 8, 1980
    Assignee: Chemische Fabrik Kalk GmbH
    Inventors: Herbert Jenkner, Robert Strang
  • Process for producing halogenated 2,2-bis-(4-hydroxyphenyl)-propane
    Patent number: 4036894
    Abstract: In producing successive batches of halogenated 2,2-bis-(4-hydroxyphenyl)-propane by reacting bisphenol A with elemental halogen in acetic acid wherein the mother liquor of a preceding batch is used as the reaction medium, the improvement comprising adding to the mother liquor an acetate such as sodium acetate to react with free hydrogen halide in the reaction medium and to increase the yield.
    Type: Grant
    Filed: March 16, 1976
    Date of Patent: July 19, 1977
    Assignee: Chemische Fabrik Kalk GmbH
    Inventor: Herbert Jenkner
  • Bis-(guanidine)-tetrabromodian and its production
    Patent number: 4022698
    Abstract: Tetrabromobisphenol A dissolved in aqueous alkalide solution is reacted with an aqueous guanidine carbonate solution to produce bis-(guanidine)-tetrabromodian having the following formula ##STR1## which compound has flame retardant properties.
    Type: Grant
    Filed: February 5, 1976
    Date of Patent: May 10, 1977
    Assignee: Chemische Fabrik Kalk GmbH
    Inventor: Herbert Jenkner
  • Process for the production of halogenated carboxylic acid amides
    Patent number: 3963674
    Abstract: A process for the production of halogenated carboxylic acid amides wherein an amide of the unsaturated aliphatic carboxylic acid is reacted with an anhydrous hydrogen halide and an epoxide compound is added to the reaction mixture and after cooling, the precipitated halogenated carboxylic acid amide is separated.
    Type: Grant
    Filed: March 7, 1975
    Date of Patent: June 15, 1976
    Assignee: Chemische Fabrik Kalk GmbH
    Inventors: Otto Konigstein, Herbert Jenkner
  • Self-extinguishing acrylonitrile-butadiene-styrene moulding composition
    Patent number: 3962164
    Abstract: Flame-proofing acrylonitrile-butadiene-styrene (ABS) polymers by incorporating therein certain mono and diphenyl aromatic bromine compounds such as octabromodiphenyl, antimony trioxide or antimony oxychloride and optionally an organo chlorine compound.
    Type: Grant
    Filed: July 3, 1974
    Date of Patent: June 8, 1976
    Assignee: Chemische Fabrik Kalk GmbH
    Inventors: Hans Eberhard Praetzel, Herbert Jenkner