Vulcanization inhibiting compounds
    3.
    发明授权
    Vulcanization inhibiting compounds 失效
    硫化抑制化合物

    公开(公告)号:US4022828A

    公开(公告)日:1977-05-10

    申请号:US454628

    申请日:1974-03-25

    CPC分类号: C08K5/435

    摘要: Novel compounds for inhibiting the premature vulcanization of vulcanizable rubber formulations comprising bis-(sulfonamido)-sulfides or polysulfides having the formula: ##STR1## where R and R' are independently selected from the group consisting of aryl, alkyl, cycloalkyl or substituted derivatives thereof and x is an integer of from 1 to 3. These novel compounds may be exemplified by bis-(N-methyl-p-toluenesulfonamido)-disulfide.

    摘要翻译: 用于抑制可硫化橡胶制剂的过早硫化的新型化合物,其包含具有下式的双((磺酰胺基) - 硫醚或多硫化物:其中R和R'独立地选自芳基,烷基,环烷基或取代的衍生物 并且x是1至3的整数。这些新化合物可以举例为双 - (N-甲基对甲苯磺酰氨基) - 二硫化物。

    Preparation of polybenzimidazoles
    9.
    发明授权
    Preparation of polybenzimidazoles 失效
    聚苯并咪唑的制备

    公开(公告)号:US4002679A

    公开(公告)日:1977-01-11

    申请号:US563007

    申请日:1975-03-27

    申请人: Fred E. Arnold

    发明人: Fred E. Arnold

    CPC分类号: C08G73/18

    摘要: A process for preparing polybenzimidazoles is disclosed in which aromatic bis-orthoaminosulfonamides and aromatic dicarboxylic acids or derivatives thereof are polymerized in polyphosphoric acid. The process provides thermally stable heterocyclic polymers of very high molecular weight that are especially useful in forming films and fibers.

    摘要翻译: 公开了一种制备聚苯并咪唑的方法,其中芳族双 - 异氨基磺酰胺和芳族二羧酸或其衍生物在多磷酸中聚合。 该方法提供了特别适用于形成薄膜和纤维的非常高分子量的热稳定性杂环聚合物。