Patents by Inventor Udo Kowalczik

Udo Kowalczik 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).

  • Thermoplastic moulding materials based on polyphenylene ethers and polyamides
    Patent number: 5252647
    Abstract: A thermoplastic moulding material is prepared by the admixture ofa) 3 to 80 parts by weight of polyphenylene ethers,b) 20 to 97 parts by weight of polyamides,c) 0.1 to 10 parts by weight of carbonates of the general formula ##STR1## in which X and Y independently of one another denote an alkyl, cycloalkyl, aryl or substituted aryl radical, each having up to 12 C atoms,d) 0 to 30 parts by weight of impact modifiers ande) 0 to 75 parts by weight of further polymers, if necessary.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: October 12, 1993
    Assignee: Huels Aktiengesellschaft
    Inventors: Joachim Mugge, Udo Kowalczik, Friedrich G. Schmidt
  • Thermoplastic molding compound based on modified co-polyphenylene ether
    Patent number: 5144002
    Abstract: Molding compounds that contain polyphenylene ethers which have been prepared from comonomers consisting of phenols substituted with benzyl groups exhibit improved mechanical properties, for example impact strength. Such molding compounds are useful for the production of industrial items such as pipes, panels or cases.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: September 1, 1992
    Assignee: Huels Aktiengesellschaft
    Inventors: Udo Kowalczik, Wolfgang Neugebauer, Martin Bartmann
  • Block copolymers based on polyphenylene ethers and polycondensates, and process for producing them
    Patent number: 5128422
    Abstract: Block copolymers based on polyphenylene ethers and polycondensates obtained by a process that comprises of the following steps:a polyphenylene ether with a functional end group is prepared by oxidative coupling of a mixture of 90.0 to 99.8 mole % of a substituted phenol and 10.0 to 0.2 mole % of a functionalized phenol;a polycondensation of suitable monomers is then carried out in the presence of this functionalized polyphenylene ether,are disclosed.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: July 7, 1992
    Assignee: Huels Aktiengesellschaft
    Inventors: Udo Kowalczik, Martin Bartmann, Heinz G. Poll
  • Thermoplastic molding compounds based on functionalized polyphenylene ethers and polyamides
    Patent number: 5039746
    Abstract: Thermoplastic molding compounds are prepared from a functionalized polyphenylene ether and a polyamide. The polyphenylene ether is functionalized by the incorporation of a small quantity of a functionalized phenol monomer.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: August 13, 1991
    Assignee: Huels Aktiengesellschaft
    Inventors: Wolfgang Neugebauer, Martin Bartmann, Udo Kowalczik, Joachim Mugge
  • Polyphenylene ether end capped with oxazoline moiety
    Patent number: 5039781
    Abstract: A polyphenylene ether having at least one functional end group of the formula: ##STR1## in which R is a divalent C.sub.1-12 aliphatic group, n is 0 or 1, and R.sub.5 is hydrogen, a C.sub.1-8 alkyl group or a hydroxy-C.sub.2-8 -alkyl.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: August 13, 1991
    Assignee: Huels Aktiengesellschaft
    Inventors: Wolfgang Neugebauer, Martin Bartmann, Udo Kowalczik
  • Process for the preparation of 4,4'-dihydroxybiphenyl
    Patent number: 4950808
    Abstract: Reducing 3,3', 5,5'-tetra-t-butyldiphenoquinone with 2,6-di-t-butylphenol, in the melt, in the presence of a 4-dialkylaminopyridine, and then dealkylating the intermediate formed, in the melt, by adding a phosphorus-containing acid or its derivative provides 4,4'-dihydroxybiphenyl of high purity in high yield.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: August 21, 1990
    Assignee: Huels Aktiengesellschaft
    Inventors: Udo Kowalczik, Martin Bartmann, Juergen Finke