Patents by Inventor Ralf Kruger

Ralf Kruger 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).

  • Patent number: 5247036
    Abstract: The title compounds contain one or more fluorinated monomers and alkenyl isocyanurates and/or alkenyl cyanurates of the formulae ##STR1## wherein R.sup.1, R.sup.2, R.sup.4 and R.sup.5 independently of one another denote C.sub.3 -C.sub.6 -alkenyl having a terminal double bond andR.sup.3 and R.sup.6 independently of one another denote C.sub.3 -C.sub.6 -alkenyl having a terminal double bond or C.sub.1 -C.sub.5 -alkyl.The alkenyl (iso)cyanurates (I) and (II) are contained in the copolymers in an amount of 0.1-5 mol %. based on the number of moles of all the comonomers. The fluorinated monomers can also be partly replaced by comonomers which do not contain fluorine.The title compounds can be crosslinked after shaping and can then be used as elastic or dimensionally stable shaped articles.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: September 21, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Kruger, Karl-Erwin Piejko, Gerhard Langstein
  • Patent number: 5227441
    Abstract: Copolymers of fluoroethylenes and masked phenols of the formula ##STR1## wherein R.sup.1 is H, C.sub.1 -C.sub.4 -alkyl,which may be further ring substituted and in which X is OY or ##STR2## Y is Si(R.sup.3).sub.3, ##STR3## R.sup.3 is alkyl, cycloalkyl or aryl.
    Type: Grant
    Filed: September 16, 1992
    Date of Patent: July 13, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Kruger, Holger Lutjens, Karl-Erwin Piejko
  • Patent number: 5214115
    Abstract: An uncrosslinked copolymer of comonomers (a), (b) and (c) and containing reactive double bonds, the comonomers based on the total mols of (a), (b) and (c) comprising(a) 45 to 99.9 mol-% of at least one ethylene containing 1 to 4 fluorine atoms,(b) 0 to 54.9 mol-% of at least one comonomer selected from the group consisting of(b1) a linear or branched C.sub.3-8 alkene containing at least one fluorine atom,(b2) an alkyl vinyl ether containing at least one fluorine atom,(b3) an open-chain or cyclic C.sub.3-6 ketone containing fluorinated .alpha.,.alpha.'-positions and(b4) non-fluorinated C.sub.2-4 alkene, C.sub.3-6 alkyl vinyl ether or C.sub.4-6 vinyl ester, and(c) 0.1 to 5 mol-% of at least one unconjugated diene. They are produced by radical polymerization. Because of the absence of bromine and/or iodine, during subsequent peroxidic cross-linking no toxic alkyl bromide and/or iodide is released.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: May 25, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Langstein, Ralf Kruger, Karl-Erwin Piejko