Nitrogen Compound Contains A Nitrogen Atom Bonded To A Nitrogen Or Oxygen Atom Patents (Class 521/95)
  • Foamable resinous polymer compositions containing acid mixtures
    Patent number: 4101469
    Abstract: A foamable polymer composition comprising a resinous polymer and a mixture of polycyclic aromatic polycarboxylic acids carrying nuclear nitro groups that is substantially soluble in acetone but substantially insoluble in water obtained as a result of the nitric acid oxidation of a carbonaceous material, such as coal.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: July 18, 1978
    Assignee: Gulf Research & Development Company
    Inventors: J. Gustav Schulz, Edward T. Sabourin
  • Process for preparing foamed solids using two or more azo compounds
    Patent number: 4101464
    Abstract: Cellular polymeric solids are made by mixing an acidulous or acidic polymerizable medium that is polymerizable and/or cross-linkable by a free radical mechanism (e.g. an unsaturated polyester) with an effective amount of two or more acid sensitive mono- or poly-azo compounds containing the group: ##STR1## wherein Y is an acid sensitive group (e.g.
    Type: Grant
    Filed: September 16, 1976
    Date of Patent: July 18, 1978
    Assignee: Pennwalt Corporation
    Inventors: Ernest Rudolph Kamens, Donald Milton Kressin, Harold Carl Lange, Ronald Edward MacLeay