Non-uniform water-insoluble interpenetrating polymer blend compositions comprising a first permeable water swellable polymer substrate interpenetrated in a gradient substantially normal to the substrate surface by a second less permeable condensation polymer to form a diffusion rate controlling membrane therein. Such compositions are useful as polymers with reduced permeabilities for water and organic solvents and therefore for the controlled delivery of active ingredients such as fragrances and bioaffecting agents into air or aqueous environments, or in membrane separation processes.
非均匀
水不溶性互穿聚合物混合物组合物,包括第一种可渗透
水膨胀聚合物基材,在基材表面与第二种渗透性较低的缩合聚合物呈梯度互穿,以在其中形成扩散速率控制膜。这种混合物可用作降低
水和有机溶剂渗透性的聚合物,因此可用于将活性成分(如
香料和
生物影响剂)有控制地输送到空气或
水环境中,或用于膜分离过程。