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Invention Grant
US08053509B2 Starch-(meth)acrylate graft copolymer, oil-swellable material and oil- and water-swellable material comprising the same, and sealing articles and packers prepared from said swellable material 有权
淀粉 - （甲基）丙烯酸酯接枝共聚物，油溶胀性材料和包含该淀粉 - （甲基）丙烯酸酯接枝共聚物的油 - 水可膨胀材料，以及由所述可溶胀材料制备的密封制品和包装机

Starch-(meth)acrylate graft copolymer, oil-swellable material and oil- and water-swellable material comprising the same, and sealing articles and packers prepared from said swellable material
Abstract:
The present invention provides a starch-(meth)acrylate graft copolymer and the preparation process thereof. The starch-(meth)acrylate graft copolymer is prepared by copolymerizing (meth)acrylate monomer and starch in a weight ratio of (0.4˜8):1, the graft copolymer having a skeleton of large starch molecule is grafted with one or more (meth)acrylate monomer with a grafting ratio of no less than 70%. The present invention further provides an oil swellable material, which comprises the starch-(meth)acrylate graft copolymer above as the swelling agent; and also an oil- and water-swellable material, which comprises the starch-(meth)acrylate graft copolymer above, water absorbing agent, reactive monomer, surfactant and material matrix. Further, sealing articles and packers prepared from the above oil swellable material and oil- and water-swellable material are also provided.
Abstract(Chinese):

本发明提供了一种淀粉 - （甲基）丙烯酸酯接枝共聚物及其制备方法。 淀粉 - （甲基）丙烯酸酯接枝共聚物通过以（重量比）（0.4〜8）：1共聚合（甲基）丙烯酸酯单体和淀粉来制备，具有大淀粉分子骨架的接枝共聚物与一个或多个（ 甲基）丙烯酸酯单体，接枝率不低于70％。 本发明还提供一种油溶胀性材料，其包含上述淀粉 - （甲基）丙烯酸酯接枝共聚物作为溶胀剂; 以及包含上述淀粉 - （甲基）丙烯酸酯接枝共聚物，吸水剂，反应性单体，表面活性剂和材料基质的油和水可溶胀材料。 此外，还提供了由上述油溶胀材料和油和水可溶胀材料制备的密封制品和包装机。

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