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    • 7. 发明授权
    • Polyvinyl pyrrolidone-grafted coatings on preformed polymers
    • 聚乙烯吡咯烷酮接枝涂层在预成型聚合物上
    • US5274028A
    • 1993-12-28
    • US622917
    • 1990-12-06
    • William J. BertrandStephen L. CoulterCary ReichPaul DeAntonio
    • William J. BertrandStephen L. CoulterCary ReichPaul DeAntonio
    • C08F291/00C08F291/18C08J7/16C08F283/00C08F283/12
    • C08J7/16C08F291/18
    • In an improved method for producing a surface graft of a hydrophilic polymer upon a preformed solid or semi-solid polymer substrate having hydroperoxide groups along its surface, n-vinyl pyrrolidone is utilized as the surface-grafting monomer, the substrate is selected to be insoluble in n-vinyl pyrrolidone, and the polymerization is carried out in aqueous alkaline conditions utilizing a combination of metal salts to provide a variable valence metal ion in a reduced state capable of oxidizing to suppress homopolymerization of the monomer in the solution.When the substrate is at least partially soluble in the n-vinyl pyrrolidone, an ethylenically unsaturated monomer having a higher reactivity with the substrate than n-vinyl pyrrolidone is added to the alkaline polymerization solution as a "seeding" monomer. Addition of the "seeding" monomer results in a surface-grafted copolymer effectively externalized from the substrate.
    • 在将亲水性聚合物的表面接枝物制成在其表面具有氢过氧化物基团的预制固体或半固体聚合物基材上的改进方法中,使用N-乙烯基吡咯烷酮作为表面接枝单体,将底物选择为不溶的 在乙烯基吡咯烷酮中进行聚合,并且使用金属盐的组合在水性碱性条件下进行聚合,以提供能够氧化的还原状态的可变价金属离子,以抑制溶液中单体的均聚。 当底物至少部分可溶于n-乙烯基吡咯烷酮时,作为“接种”单体,向碱性聚合溶液中加入与底物比具有高于N-乙烯基吡咯烷酮的反应性更高的烯属不饱和单体。 添加“接种”单体导致有效地从基底外化的表面接枝共聚物。