Polyurethane polymers characterized by lactone groups and hydroxyl
groups in the polymer backbone
    4.
    发明授权
    Polyurethane polymers characterized by lactone groups and hydroxyl groups in the polymer backbone 失效
    聚氨酯聚合物以聚合物主链中的内酯基团和羟基为特征

    公开(公告)号:US4156066A

    公开(公告)日:1979-05-22

    申请号:US809260

    申请日:1977-06-23

    Inventor: Francis E. Gould

    Abstract: Polyurethane polymers characterized by a molecular weight above 6,000 and having lactone groups and hydroxyl groups in the polymer backbone are prepared by reacting a mixture of polyglycols proportioned so as to provide the desired polymer properties, a polyfunctional lactone and a polyfunctional isocyanate. The product is soluble in alkaline solutions and may be used for light sensitive photographic layers on films, paper or glass; in drug delivery systems, as burn dressings, in body implants such as vascular prosthesis, and in the manufacture of catheters. The novel polymers also find use in the manufacture of artificial finger nails, finger cots, adhesives, and in protective and hydrostatic drag resistant coatings. The water absorptivity of the polyurethane lactone polymers is above 10%, preferably above 20%, and these polymers may range to completely gel-like high water absorptive polymers. The polymers of the present invention can provide a leachable substrate wherein the leaching agent may be water, gases, alcohols, esters and body fluids, e.g., animal or human.

    Abstract translation: 聚合物主链中分子量高于6000并具有内酯基团和羟基的聚氨酯聚合物通过使成比例的聚二醇混合物反应以提供所需的聚合物性质,多官能内酯和多官能异氰酸酯来制备。 该产品可溶于碱性溶液,可用于薄膜,纸张或玻璃上的感光照相层; 在药物递送系统中,作为烧伤敷料,体内植入物例如血管假体,以及制造导管。 新型聚合物也可用于制造人造指甲,手指套,粘合剂,以及保护和静电阻力涂层。 聚氨酯内酯聚合物的吸水率高于10%,优选高于20%,这些聚合物可以是完全凝胶状的高吸水性聚合物。 本发明的聚合物可以提供可浸出的底物,其中浸出剂可以是水,气体,醇,酯和体液,例如动物或人。

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