Patents by Inventor Heinz Uelzmann

Heinz Uelzmann 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: 4101602
    Abstract: Novel products can be prepared by reaction of monohydrazides and/or polyhydrazides, in particular dihydrazides, with mono-, di- or, poly-acrylyl compounds. The reactants can be chosen such that the resulting polymers are strictly linear as in the case of reaction of a monohydrazide with a diacrylyl compound as follows: ##STR1## wherein each (O) is a carbonyl oxygen, n is a positive integer, each R is hydrogen or a monovalent group, and each Q is an organic group, R and Q being free of functions which would interfere with the desired reaction at 80.degree. C. Various degrees of crosslinking can be achieved by reacting monohydrazdes with components containing an average of more than two acrylate double bonds per molecule or by reacting di-hydrazides with di- or poly-acrylyl compounds.Fumaric, maleic and itaconic esters and acid esters add to hydrazides in a similar fashion as acrylates, the aliphatic double bond being similarly activated by the carbonyl group.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: July 18, 1978
    Assignee: The General Tire & Rubber Company
    Inventors: Hubert J. Fabris, David P. Gruber, David R. Sponseller, Heinz Uelzmann
  • Patent number: 4061845
    Abstract: Novel products can be prepared by reaction of monohydrazides and/or polyhydrazides, in particular dihydrazides, with mono-, di- or, poly-acrylyl compounds. The reactants can be chosen such that the resulting polymers are strictly linear as in the case of reaction of a monohydrazide with a diacrylyl compound as follows: ##STR1## WHEREIN EACH (O) is a carbonyl oxygen, n is a positive integer, each R is hydrogen or a monovalent group, and each Q is an organic group, R and Q being free of functions which would interfere with the desired reaction at 80.degree. C. Various degrees of crosslinking can be achieved by reacting monohydrazides with components containing an average of more than two acrylate double bonds per molecule or by reacting di-hydrazides with di- or poly-acrylyl compounds.Fumaric, maleic and itaconic esters and acid esters add to hydrazides in a similar fashion as acrylates, the aliphatic double bond being similarly activated by the carbonyl group.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: December 6, 1977
    Assignee: The General Tire & Rubber Company
    Inventors: Hubert J. Fabris, David P. Gruber, David R. Sponseller, Heinz Uelzmann
  • Patent number: 3980594
    Abstract: Quaternary ammonium salts or inorganic and organic oxygen acids having pK values (where pK is the negative log of the dissociation constant) for at least one of the dissociable hydrogen atoms equal to or greater than 2.0 in aqueous solution are employed as extremely efficient catalysts for trimerization of organic isocyanates, particularly aromatic isocyanates, to isocyanurates and for urethane formation.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: September 14, 1976
    Assignee: The General Tire & Rubber Company
    Inventors: Hubert J. Fabris, Edwin M. Maxey, Heinz Uelzmann
  • Patent number: 3977923
    Abstract: A new class of multiaziridines are provided having the formula: ##EQU1## WHEREIN R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are monovalent radicals that may be the same or different and are hydrogen, 1-5 carbon alkyl or 1-5 carbon alkenyl,R.sub.5 is a multivalent hydrocarbon radical containing 2 to 24 carbon atoms, andn is an integer from 2 to 4.These multiaziridines are used to produce elastomeric compositions of controlled plasticity and gel content, plus other unique polymeric products, by reaction with polycarboxylic organic compounds, e.g., controlled combination of chain-extending and cross-linking of polycarboxylated polymers.
    Type: Grant
    Filed: December 3, 1969
    Date of Patent: August 31, 1976
    Assignee: The General Tire & Rubber Company
    Inventor: Heinz Uelzmann