Chromate curable sealant compositions
    4.
    发明授权
    Chromate curable sealant compositions 失效
    铬酸盐可固化密封剂组合物

    公开(公告)号:US3849381A

    公开(公告)日:1974-11-19

    申请号:US31551172

    申请日:1972-12-15

    发明人: DOSS R GINGERICH L

    摘要: 1. A COMPOSITION CURABLE TO A SEALANT COMPRISING (A) A POLY(OXYALKYLENE) - POLYESTER - POLY(MONOSULFIDE)-POLYTHIOL HAVING AN AVERAGE OF MORE THAN TWO MERCAPTO GROUPS PER MOLECULE AND (B) A CHROMATE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL MONOCHROMATES, DICHROMATES, TRICHROMATES AND TETRACHROMATES IN AN AMOUNT SUFFICIENT TO CONVERT AT LEAST ABOUT 70 PERCENT OF THE PENDANT THIOL GROUPS TO POLYSULFIDE GROUPS AND THUS FORM A SEALANT, SAID (A) BEING THE ACIDIC, UNNEUTRALIZED POLYMERIC REACTION PRODUCT OF AT LEAST ONE MERCAPTOALKANOIC ACID, AT LEAST ONE THIODIALKANOIC ACID, AND AT LEAST ONE POLY(OXYALKYLENE)-POLYOL HAVING AN AVERAGE OF MORE THAN TWO HYDROXY GROUPS PER MOLECULE.