Patents by Inventor Rudolf Mayer-Mader

Rudolf Mayer-Mader 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).

  • Xanthogen disulphides with functional groups
    Patent number: 4032541
    Abstract: This invention relates to xanthogen disulphides of the formula ##STR1## in which R is the same or different and denotes the following groups: ##STR2## WHEREIN X = H, alkyl, aryl, aralkyl or halogenn = 1 to 20,A process for preparing them, a process for polymerizing dienes and .alpha.-olefines in the presence of these particular xanthogen disulphides and to vulcanizable rubber mixtures consisting of an uncross-linked benzene soluble chloroprene homopolymer or copolymer which is prepared in the presence of said xanthogen disulphides.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: June 28, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rudolf Mayer-Mader, Wilhelm Gobel
  • Xanthogen disulphides with functional groups
    Patent number: 4016177
    Abstract: This invention relates to xanthogen disulphides of the formula ##STR1## in which R is the same or different and denotes the following groups: ##STR2## wherein X = H, alkyl, aryl, aralkyl or halogenn = 1 to 20,A process for preparing them, a process for polymerizing dienes and .alpha.-olefines in the presence of these particular xanthogen disulphides and to vulcanizable rubber mixtures consisting of an uncross-linked benzene soluble chloroprene homopolymer or copolymer which is prepared in the presence of said xanthogen disulphides.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: April 5, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rudolf Mayer-Mader, Wilhelm Gobel
  • Mixture of benzene-soluble and benzene-insoluble chloroprene polymers wherein the former polymer is prepared in the presence of a dialkoxyxanthogendisulphide
    Patent number: 4000222
    Abstract: Dialkoxyxanthogendisulphides, their production by reacting an alcohol and carbondisulphide in the presence of alkali and subsequent oxidation, use of these dialkoxyxanthogendisulphides as molecular weight regulators in polymerization processes and a mixture of chloroprene-copolymers made in the presence of dialkoxyxanthogendisulphides.
    Type: Grant
    Filed: August 7, 1974
    Date of Patent: December 28, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rudolf Mayer-Mader, Jurgen Boldt
  • Process using dialkoxy-xanthogendisulphides as molecular weight regulators
    Patent number: 3984384
    Abstract: Dialkoxyxanthogendisulphides, their production by reacting an alcohol and carbondisulphide in the presence of alkali and subsequent oxydation, use of these dialkoxyxanthogendisulphides as molecular weight regulators in polymerization processes and a mixture of chloroprene-copolymers made in the presence of dialkoxyxanthogendisulphides.
    Type: Grant
    Filed: August 7, 1974
    Date of Patent: October 5, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rudolf Mayer-Mader, Jurgen Boldt
  • Process employing xanthogen disulphides with functional groups to produce chloroprene polymer blends
    Patent number: 3954916
    Abstract: This invention relates to xanthogen disulphides of the formula ##EQU1## in which R is the same or different and denotes the following groups: ##EQU2## wherein X = H, alkyl, aryl, aralkyl or halogenn = 1 to 20,A process for preparing them, a process for polymerising dienes and monoethylenically unsaturated copolymerizable monomers in the presence of these particular xanthogen disulphides and to vulcanisable rubber mixtures consisting of an uncross-linked benzene soluble chloroprene homopolymer or copolymer which is prepared in the presence of said xanthogen disulphides.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: May 4, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rudolf Mayer-Mader, Wilhelm Gobel