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    • 86. 发明授权
    • Plasticizer containing polyvinyl alcohol granules
    • 含增塑剂的聚乙烯醇颗粒
    • US4323492A
    • 1982-04-06
    • US211627
    • 1980-12-01
    • Wolfgang ZimmermannAlbrecht Harreus
    • Wolfgang ZimmermannAlbrecht Harreus
    • C08L29/00C08J3/12C08J3/16C08J3/18C08K5/00C08K5/05C08L29/02C08L29/04C08K3/18
    • C08J3/18C08J3/12C08K5/0016C08J2329/04
    • For the thermoplastic processing of polyvinyl alcohol, the processing temperature must be below the decomposition temperature of the polyvinyl alcohol; this is attained by incorporating plasticizers. For preparing a plasticizer-containing granular polyvinyl alcohol wherein the plasticizer is homogeneously distributed, there is used as starting material a granular polyvinyl alcohol consisting substantially of particles having a definite diameter. The plasticizer is incorporated in the presence of a small amount of water insufficient to dissolve the polyvinyl alcohol, and the temperature is adjusted in a definite manner during the mixing operation. Simultaneous presence of fine particles of a high molecular weight organic compound soluble or dispersible in water is advantageous. The plasticizer-containing granular polyvinyl alcohol is suitable for the manufacture of any shaped articles, especially films and sheets.
    • 对于聚乙烯醇的热塑性加工,加工温度必须低于聚乙烯醇的分解温度; 这是通过加入增塑剂来实现的。 为了制备含增塑剂的粒状聚乙烯醇,其中增塑剂均匀分布,用作基本上由具有一定直径的颗粒组成的颗粒状聚乙烯醇作为原料。 在不足以溶解聚乙烯醇的少量水的存在下引入增塑剂,并且在混合操作期间以一定的方式调节温度。 同时存在可溶于或可分散在水中的高分子量有机化合物的细颗粒是有利的。 含增塑剂的颗粒状聚乙烯醇适用于任何成型制品,特别是薄膜和片材的制造。