Transparent polyamides from PACM and a mixture of dicarboxylic acids
    11.
    发明授权
    Transparent polyamides from PACM and a mixture of dicarboxylic acids 失效
    来自PACM的透明聚酰胺和二羧酸的混合物

    公开(公告)号:US4205159A

    公开(公告)日:1980-05-27

    申请号:US925409

    申请日:1978-07-17

    IPC分类号: C08G69/00 C08G69/26

    CPC分类号: C08G69/265

    摘要: A transparent polyamide which is the polycondensation product of bis-(4-aminocyclohexyl)-methane and a mixture of azelaic acid and at least one acid selected from group consisting of isophthalic acid and adipic acid. Up to 30 mol % of said bis-(4-aminocyclohexyl)-methane may also be replaced with hexamethylene diamine or another C.sub.8 -C.sub.15 cycloaliphatic diamine. Said transparent polyamide is useful for the production of sheets, films, plates, tubes, rods and containers of various types by extruding or molding.

    摘要翻译: 作为双 - (4-氨基环己基) - 甲烷和壬二酸与至少一种选自间苯二甲酸和己二酸的酸的混合物的缩聚产物的透明聚酰胺。 所述双 - (4-氨基环己基) - 甲烷的至多30摩尔%也可以被六亚甲基二胺或另一种C 8 -C 15脂环族二胺代替。 所述透明聚酰胺可用于通过挤出或模塑生产各种类型的片材,薄膜,板,管,棒和容器。

    Active compound release systems
    17.
    发明授权
    Active compound release systems 失效
    活性化合物释放系统

    公开(公告)号:US4661104A

    公开(公告)日:1987-04-28

    申请号:US681976

    申请日:1984-12-14

    摘要: In a therapeutic system such as a plaster for administration of an active compound through the skin and comprising a covering layer which is essentially impermeable to the active compound, an active compound reservoir layer and a protective layer which can be pulled off and which is essentially impermeable to the active compound, the improvement wherein the reservoir layer contain about 1-30% of active compound in an elastomer mixture comprising a predominantly amorphous olefinic (co)polymer with a glass transition temperature of

    摘要翻译: 在诸如用于通过皮肤施用活性化合物的石膏的治疗系统中,包括基本上不可渗透活性化合物的覆盖层,活性化合物储存层和可以被拉出并且基本上不渗透的保护层 对活性化合物的改进,其中储层在含有玻璃化转变温度<20℃的主要是无定形烯烃(共)聚合物的弹性体混合物中含有约1-30%的活性化合物,与0混合 至约50重量%的聚异丁烯,聚丁二烯油和/或石蜡油,以及增粘树脂。 因此,活性化合物可以在更长的时间内以相对大的量调节释放。