Coating of a hydrophobic polymer substrate with a nonstoichiometric
polyelectrolyte complex
    5.
    发明授权
    Coating of a hydrophobic polymer substrate with a nonstoichiometric polyelectrolyte complex 失效
    用非化学计量的聚电解质复合物涂覆疏水性聚合物基材

    公开(公告)号:US6060410A

    公开(公告)日:2000-05-09

    申请号:US64243

    申请日:1998-04-22

    摘要: A method of coating the surface of a substrate, such as a film or a fibrous web, which is composed of a hydrophobic polymer. The method involves providing a solution of a first polyelectrolyte having ionizable groups and a solution of a second polyelectrolyte having ionizable groups. The two solutions then are mixed under conditions adapted to result in the formation of a nonstoichiometric polyelectrolyte complex. Finally, the surface of the hydrophobic polymer substrate is contacted with a solution of the complex under conditions sufficient to result in the coating of the surface of the substrate with the complex. The ionizable groups of the second polyelectrolyte have a latent charge opposite the latent charge of the ionizable groups of the first polyelectrolyte. Moreover, the amounts of the first and second polyelectrolytes are selected to give a ratio of the number of ionizable groups in the first polyelectrolyte to the number of ionizable groups in the second polyelectrolyte of at least about 2, and the molecular weight of the first polyelectrolyte is at least about 40,000 daltons and at least about 2 times the molecular weight of the second polyelectrolyte.

    摘要翻译: 涂布由疏水性聚合物构成的基材例如薄膜或纤维网的表面的方法。 该方法包括提供具有可离子化基团的第一聚电解质和具有可离子化基团的第二聚电解质溶液的溶液。 然后将两种溶液在适于导致形成非化学计量的聚电解质络合物的条件下混合。 最后,疏水聚合物基材的表面在足以导致用复合物涂覆基材表面的条件下与络合物的溶液接触。 第二聚电解质的可电离基团具有与第一聚电解质的可离子化基团的潜在电荷相反的潜在电荷。 此外,选择第一和第二聚电解质的量以使第一聚电解质中的可电离基团的数量与第二聚电解质中的可离子化基团的数量的比率至少为约2,第一聚电解质的分子量 是至少约40,000道尔顿和至少约2倍于第二聚电解质的分子量。