Breathable, hydrolyzable porous film
    22.
    发明授权
    Breathable, hydrolyzable porous film 失效
    透气,可水解多孔膜

    公开(公告)号:US5340646A

    公开(公告)日:1994-08-23

    申请号:US871651

    申请日:1992-04-21

    IPC分类号: C08J5/18 B32B3/06 C08G63/08

    摘要: A breathable, hydrolyzable, porous film which is obtained by the process comprising adding from 40 to 250 parts by weight of a finely-powdered filler having an average particle size of from 0.3 to 4 .mu.m to 100 parts by weight of a polylactic acid-based resin composition comprising from 80 to 100% by weight of polylactic acid or a lactic acid-hydroxycarboxylic acid copolymer and from 0 to 20% by weight of a plasticizer, melting and film-forming the resultant mixture, and successively stretching the thus-obtained film 1.1 times or more at least in the direction of the axis; and which is consequently useful as a material for leakproof films of sanitary materials such as a paper diaper and packaging materials, and does not accumulate as wastes because of hydrolyzability in the natural environment in the case of being abandoned after use.

    摘要翻译: 一种透气的,可水解的多孔膜,其通过该方法获得,包括将40至250重量份的平均粒度为0.3至4μm的细粉末填料加入到100重量份的聚乳酸 - 包含80-100重量%的聚乳酸或乳酸 - 羟基羧酸共聚物和0-20重量%的增塑剂,熔融和成膜所得混合物,并依次拉伸由此获得的 至少在轴的方向上为1.1倍以上的膜; 因此可用作纸尿布和包装材料等卫生材料的防漏膜的材料,并且由于在使用后放弃的情况下由于自然环境中的水解性而不会作为废物积聚。

    Sustained releasing drug comprising copolymers and process for preparing the same
    25.
    发明授权
    Sustained releasing drug comprising copolymers and process for preparing the same 有权
    包含共聚物的缓释药物及其制备方法

    公开(公告)号:US06419951B1

    公开(公告)日:2002-07-16

    申请号:US09985874

    申请日:2001-11-06

    IPC分类号: A61K952

    摘要: A sustained releasing drug which includes an effective component and a copolymer having a weight-average molecular weight of 1,000 to 100,000 which comprises, as repeating structure units, both of a succinimide unit represented by the structural formula (1) and a hydroxycarboxylic acid unit represented by the structural formula (2) wherein R is a methyl group or a hydrogen atom, and a process for preparing a copolymer which comprises a polymerization step of heating a mixture of aspartic acid and a cyclic ester compound.

    摘要翻译: 一种持续释放药物,其包含有效成分和重均分子量为1,000〜100,000的共聚物,其包含作为重复结构单元的由结构式(1)表示的琥珀酰亚胺单元和表示的结构式(1)所示的羟基羧酸单元 通过其中R是甲基或氢原子的结构式(2),以及包括加热天冬氨酸和环状酯化合物的混合物的聚合步骤的共聚物的制备方法。

    Nylon composition having increased hydrolyzability and method for
increasing hydrolyzability of nylon
    27.
    发明授权
    Nylon composition having increased hydrolyzability and method for increasing hydrolyzability of nylon 失效
    具有增加的水解性的尼龙组合物和增加尼龙的水解性的方法

    公开(公告)号:US5272221A

    公开(公告)日:1993-12-21

    申请号:US863085

    申请日:1992-04-03

    IPC分类号: A61L31/04 C08L77/00 C08G69/48

    摘要: The present invention provides a nylon composition having increased hydrolyzability which is obtained by physically mixing 100 parts by weight of a nylon with 1 to 50 parts by weight of at least one polymer selected from the group consisting of polylactic acid, polyglycolic acid and a copolymer containing 50 mol % or more of a lactic acid unit or a glycolic acid unit as a repeating unit in its chain; and a method for increasing the hydrolyzability of a nylon by preparing such a composition. High hydrolyzability can be imparted to the nylon inherently having extremely low hydrolyzability without impairing its original mechanical strength. Therefore, various molded articles made from the nylon can be hydrolyzed under natural circumstances, and thus the wastes are not stored.

    摘要翻译: 本发明提供了具有增加的水解性的尼龙组合物,其通过将100重量份的尼龙与1至50重量份的至少一种选自聚乳酸,聚乙醇酸和含有 50重量%以上的乳酸单元或乙醇酸单元作为其链中的重复单元; 以及通过制备这种组合物来提高尼龙的水解性的方法。 可以将高水解性赋予固有地具有极低水解性的尼龙,而不损害其原始的机械强度。 因此,由尼龙制成的各种成型体在自然条件下可以水解,因此不会将废物进行储存。

    Process for preparing a degradable high polymer network
    28.
    发明授权
    Process for preparing a degradable high polymer network 失效
    制备可降解高分子网络的方法

    公开(公告)号:US5238968A

    公开(公告)日:1993-08-24

    申请号:US5375

    申请日:1993-01-15

    IPC分类号: B29C44/56 C08J9/06 C08J9/12

    摘要: A degradable polymer network obtained by adding from 0.2 to 10 parts by weight of a foaming agent to 100 parts by weight of a polylactic acid-base resin composition comprising from 80 to 100% by weight of polylactic acid or a lactic acid-hydroxycarboxylic acid copolymer and from 0 to 20% by weight of a plasticizer, conducting melt-foaming extrusion of resulting mixture, and opening the foam cells in the extrudate. The high polymer network is characterized in suitable flexibility and hydrolyzability and thus useful as a material for absorbing of oils and body fluids, screens for sunlight, heat-insulating materials, filter media and packaging materials; and does not accumulate as industrial wastes because of hydrolyzability in the natural environment, even though abandoned after use.

    摘要翻译: 通过将0.2〜10重量份的发泡剂加入到100重量份的包含80至100重量%的聚乳酸或乳酸 - 羟基羧酸共聚物的聚乳酸基树脂组合物中获得的可降解聚合物网络 和0至20重量%的增塑剂,对所得混合物进行熔融发泡挤出,以及在挤出物中打开泡沫细胞。 高聚物网络的特征在于具有合适的柔性和水解性,因此可用作吸收油和体液,阳光屏蔽,绝热材料,过滤介质和包装材料的材料; 并且由于天然环境中的水解性而不会作为工业废物积累,即使在使用后放弃。

    Styrene derivatives having N-acetylchito-oligosaccharide chains and
method for the same
    29.
    发明授权
    Styrene derivatives having N-acetylchito-oligosaccharide chains and method for the same 失效
    具有N-乙酰氨基寡糖链的苯乙烯衍生物及其制备方法

    公开(公告)号:US5206318A

    公开(公告)日:1993-04-27

    申请号:US855159

    申请日:1992-03-20

    摘要: A styrene derivative carrying N-acethylchito-oligosaccharide chains, a polystyrene derivative carrying N-acetylchito-oligosaccharide chains on the side chains as well as a method for preparing these compounds are herein disclosed. The method for preparing the styrene derivative comprises reacting N-acetylchito-oligosaccharide lactone with vinylbenzylamine or a derivative thereof while the method for preparing the polystyrene derivative comprises polymerizing the styrene derivative. These derivatives can be employed as biomedical materials, in particular as materials for cell culture.

    摘要翻译: 本文公开了携带N-乙酰壳寡糖链的苯乙烯衍生物,侧链上携带N-乙酰基 - 寡糖链的聚苯乙烯衍生物以及这些化合物的制备方法。 制备苯乙烯衍生物的方法包括使N-乙酰基壳寡糖内酯与乙烯基苄胺或其衍生物反应,而制备聚苯乙烯衍生物的方法包括使苯乙烯衍生物聚合。 这些衍生物可以用作生物医学材料,特别是作为细胞培养的材料。