1,3-diazole Patents (Class 524/93)
  • Patent number: 4356274
    Abstract: Smoke suppressed rigid polyurethane foams are prepared from a reaction mixture comprising as the smoke suppressant additive a metal salt of a: dialkyl dithiocarbamate, a mercaptobenzothiazole, a 2,5-dimercapto-1,3,4-thiadiazole, a mercaptotriazine, a hydroxy thiophenol or an aliphatic dimercapto compound of 2 to 10 carbons.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: October 26, 1982
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Jeffrey D. Miano
  • Patent number: 4341693
    Abstract: Oligomeric, essentially linear epoxide resins with chlorine-containing and/or bromine-containing benzimidazolone radicals in the oligomer chain are particularly suitable as flameproofing agents for thermosetting and thermoplastic polymers.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: July 27, 1982
    Assignee: Ciba-Geigy Corporation
    Inventor: Lothar Buxbaum
  • Patent number: 4340735
    Abstract: Isoindoline colorants of the formula ##STR1## where R.sup.1 is the radical of a 5-membered or 6-membered heterocyclic unsaturated ring, which may or may not be fused to a benzo ring, X is ##STR2## R.sup.2 and R.sup.3 independently of one another are hydrogen, C.sub.1 -C.sub.4 -alkyl, benzyl, phenyl or 1-naphthyl, and R.sup.1, the phenyl and naphthyl radicals, and the ring A may or may not be substituted by groups which do not confer solubility.In surface coatings, printing inks and plastics the novel colorants give yellow to red or brown very deep colorations which have good lightfastness, and fastness to weathering and to overspraying.
    Type: Grant
    Filed: January 22, 1981
    Date of Patent: July 20, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Lotsch, Reinhard Kemper
  • Patent number: 4317759
    Abstract: An aqueous acrylamide polymer solution is stabilized by causing it to contain in combination a 2-mercaptobenzimidazole compound and a phenolic antioxidant compound.
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: March 2, 1982
    Assignees: Nitto Kagaku Kogyo Kabushiki Kaisha, Kawaguchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Shoichi Kanda, Toshikazu Oda, Yasunosuke Tanabe, Takeshi Arai