Process for preparing curable polyolefin polymers
    6.
    发明授权
    Process for preparing curable polyolefin polymers 失效
    制备可固化聚烯烃聚合物的方法

    公开(公告)号:US4522957A

    公开(公告)日:1985-06-11

    申请号:US414646

    申请日:1982-09-03

    申请人: Billy H. Ashley

    发明人: Billy H. Ashley

    摘要: The disclosure is directed to improvements in a process for preparing curable polyolefin polymers in which a mass of dry, discrete, free-flowing particles of polyolefin polymer is tumbled in admixture with a curing agent effective to cause curing when the finished product is subjected to curing temperature, which comprises tumbling said mass in two separate and discrete steps in which essentially all of the curing agent is incorporated into said mass in the first tumbling step and equilibration between the curing agent and the polymer is effected in the second tumbling step while maintaining in both tumbling steps a temperature above the melting point of said curing agent but below both the agglomerating temperature and the curing temperature and, at least in the second tumbling step, a temperature which provides equilibration between the curing agent and the polymer; and thereafter tumble-cooling the thus-treated mass until a dry, discrete, free-flowing mass of polymer particles is obtained. The tumbling steps are advantageously effected in a Zig-Zag Blender.TM., wherein incorporation of the curing agent is effected by spraying liquid curing agent onto particles of said polymer while they are separated from said mass and dispersed in the atmosphere which envelopes said mass.

    摘要翻译: 本发明涉及制备可固化聚烯烃聚合物的方法的改进,其中大量干燥,离散的,自由流动的聚烯烃聚合物颗粒与固化剂混合,当最终产品经过固化时有效地引起固化 温度,其包括在两个分离和离散的步骤中翻转所述物质,其中在第一翻滚步骤中基本上将所有固化剂并入所述物质中,并且在第二次翻滚步骤中进行固化剂和聚合物之间的平衡,同时保持 两个翻转步骤是高于所述固化剂的熔点但低于凝聚温度和固化温度的温度,并且至少在第二翻滚步骤中,提供固化剂和聚合物之间的平衡的温度; 然后对这样处理的物质进行翻滚冷却,直到获得干燥,离散,自由流动的聚合物颗粒物质。 翻转步骤有利地在Zig-Zag Blender TM中实现,其中固化剂的并入通过将液体固化剂喷射到所述聚合物的颗粒上而与所述物质分离并分散在包围所述物质的气氛中来实现。