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    Slow release films and methods of making same
    45.
    发明授权
    Slow release films and methods of making same 失效
    慢释片及其制备方法

    公开(公告)号：US3655129A

    公开(公告)日：1972-04-11

    申请号：US3655129D

    申请日：1968-07-17

    Applicant: PPG INDUSTRIES INC

    Inventor： SEINER JEROME A

    IPC: A61L9/04 ,  C08J9/28 ,  C08K5/00 ,  A24F25/00

    CPC classification number: A61L9/042 ,  C08J9/28 ,  C08J2201/0502 ,  C08K5/0058 ,  Y10S428/905

    Abstract: Disclosed herein are various coatable films which have entrapped within their polymeric matrix minute droplets of a liquid nonsolvent. The polymeric matrix and non-solvent are chosen such that there is effected about the film a controlled release of the non-solvent from the film. Utility lies in choosing the nonsolvent so that it comprises substances such as perfumes, deodorants, air fresheners, medicines, pesticides, corrosion inhibitors, fungicides, etc. The atmospheres generated are thus used to supply the various substances to a needy environment.

    Abstract translation: 本文公开了各种可涂覆的膜，其在其聚合物基质中截留了液体非溶剂的微小液滴。 选择聚合物基体和非溶剂使得可以使膜对膜的非溶剂的受控释放。 实用性在于选择非溶剂，使其包括香料，除臭剂，空气清新剂，药物，农药，腐蚀抑制剂，杀真菌剂等物质。因此，所生成的气氛用于将各种物质供应给有需要的环境。

    Expanded polyelectrolyte resin and process for making same
    46.
    发明授权
    Expanded polyelectrolyte resin and process for making same 失效
    膨胀聚电解质树脂及其制备方法

    公开(公告)号：US3635846A

    公开(公告)日：1972-01-18

    申请号：US3635846D

    申请日：1967-07-13

    Applicant: AMICON CORP

    Inventor： SPLITZ STEPHEN A

    IPC: C08J9/28 ,  C08F47/08 ,  C08F33/08

    CPC classification number: C08J9/28 ,  C08J2201/0502

    Abstract: A process for making highly expanded polyelectrolyte gel powders suitable for incorporation into, and imparting improved moisture vapor transmission rates to, films comprising hydrophobic polymers and the like. This process comprises the removal of water and other plasticizing components from precipitated polyelectrolyte complex gels, redispersing the gel in a volatile liquid medium, and thereupon causing the rapid evaporation of said volatile medium under conditions, conveniently moderately elevated temperatures, which prevent moisture from condensing on the polyelectrolyte gel as it is separated from the aforesaid volatile medium. The unique products of the invention are highly porous and characterized by their high absorptivity of dioctyl phthalate, their low-bulk density and their ability to enhance the moisture vapor transmission of a standard polyvinylchloride film formulation by a factor in excess of about 5 when incorporated therein at loadings of about 15 percent on total polymer weight.

    Abstract translation: 一种用于制备高度膨胀的聚电解质凝胶粉末的方法，其适于掺入并赋予包含疏水性聚合物等的膜的改善的水蒸汽透过率。 该方法包括从沉淀的聚电解质复合凝胶中除去水和其它增塑组分，将凝胶再分散在挥发性液体介质中，并随后引起所述挥发性介质的快速蒸发，条件适宜温和升高，防止水分冷凝 该聚电解质凝胶与上述挥发性介质分离。 本发明的独特产品是高度多孔的，其特征在于其邻苯二甲酸二辛酯的高吸收性，它们的低堆积密度以及当将标准聚氯乙烯薄膜制剂掺入其中时将其增加超过约5的因子的水蒸汽透过性的能力 在总聚合物重量上的载体量为约15％。

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