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    • 4. 发明授权
    • Catalyzed non-toxic polyurethane forming compositions and separatory
devices employing the same
    • 催化无毒的聚氨酯形成组合物和采用其的分离装置
    • US4256617A
    • 1981-03-17
    • US90206
    • 1979-11-01
    • Thaddeus F. KroplinskiBarton C. Case
    • Thaddeus F. KroplinskiBarton C. Case
    • C08G18/10C08G18/12C08G18/16
    • C08G18/168C08G18/10C08G18/12Y10S524/906
    • The present invention is directed to improvements in non-toxic polyurethane compositions and separatory devices employing the same, such as hollow fiber separatory devices intended to be used in biomedical applications. The separatory device employs at least one separatory membrane suitable for the intended end use application which is secured, potted or sealed in a housing using a cured flexible polyurethane composition. The improvement in the polyurethane composition employed in the separatory device is achieved by reacting at least one NCO-terminated prepolymer and at least one polyol in the presence of a ricinoleic acid reactive catalyst. The catalyst reduces the curing time of the polyurethane resin and because it is sufficiently reactive with the NCO-terminated prepolymer, it is incorporated into the structure of the polyurethane and cannot be released during operation of the separatory device.
    • 本发明涉及无毒聚氨酯组合物的改进和使用该组合物的分离装置,例如旨在用于生物医学应用的中空纤维分离装置。 分离装置使用至少一种适用于预期最终用途应用的分离膜,其使用固化的柔性聚氨酯组合物固定,盆或密封在壳体中。 在分离装置中使用的聚氨酯组合物的改进通过在蓖麻油酸反应催化剂存在下使至少一种NCO-封端的预聚物和至少一种多元醇反应来实现。 该催化剂降低了聚氨酯树脂的固化时间,并且由于其与NCO封端的预聚物具有足够的反应性,所以其结合到聚氨酯的结构中,并且在分离装置的操作期间不能释放。
    • 8. 发明授权
    • Stabilized diphenylmethane diisocyanate prepolymer
    • 稳定二苯甲烷二异氰酸酯预聚物
    • US4125545A
    • 1978-11-14
    • US836834
    • 1977-09-26
    • Thaddeus F. KroplinskiMelvin Brauer
    • Thaddeus F. KroplinskiMelvin Brauer
    • C08G18/00C08G18/10C08G18/72C09F7/06C07C118/00C08L91/00
    • C08G18/724C08G18/10
    • Liquid 4,4'diphenylmethane diisocyanate (MDI) prepolymers have been produced which remain fluid and do not crystallize at temperatures below 40.degree. F. These prepolymers comprise the reaction product of a polyol, 4,4'diphenylmethane diisocyanate (MDI) and an aliphatic and/or cycloaliphatic diisocyanate. The polyol employed is selected from the group consisting of castor oil, polyoxypropylene glycol, polyhydric alcohol mono- and di-esters of hydroxyacids of at least 12 carbon atoms and mixtures thereof.The reaction product contains the polyol in amount from about 10% to about 40%, the 4,4'diphenylmethane diisocyanate in amount from about 50% to about 70% and the aliphatic or cycloaliphatic isocyanate in amount from about 10% to about 20%. The prepolymer should be prepared such that the NCO/OH ratio should fall within the range of about 3 to about 7.
    • 已经制备了液体4,4'-二苯基甲烷二异氰酸酯(MDI)预聚物,其保持流体并且在低于40°F的温度下不结晶。这些预聚物包括多元醇,4,4'-二苯基甲烷二异氰酸酯(MDI)和脂族 和/或脂环族二异氰酸酯。 所使用的多元醇选自蓖麻油,聚氧丙烯二醇,至少12个碳原子的羟基酸的多元醇单酯和二酯及其混合物。