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    Immobilzation of lipase for resolving racemates of esters of racemic alcohols
    22.
    发明授权
    Immobilzation of lipase for resolving racemates of esters of racemic alcohols 失效
    用于拆分外消旋酯的酯的外消旋体的脂肪酶的固定化

    公开(公告)号：US5021345A

    公开(公告)日：1991-06-04

    申请号：US267287

    申请日：1988-11-04

    申请人： Dieter Urban ,  Wolfgang Ladner ,  Axel Paul

    发明人： Dieter Urban ,  Wolfgang Ladner ,  Axel Paul

    IPC分类号： C12N11/08 ,  C12P41/00

    CPC分类号： C12P41/004 ,  C12N11/08

    摘要： Lipase is immobilized by mixing a substrate, a crude porcine pancreatic lipase, an aqueous buffer solution at pH 5-9 and one or more water-soluble polyhydric aliphatic alcohols having from 2 to 6 carbon atoms and from 2 to 6 hydroxyl groups at a temperature of from 0.degree. to 40.degree. C. to form a mixture, allowing the mixture to stand for from 1 minute to 3 days, filtering the mixture to produce a filter cake and washing the cake to obtain the immobilized lipase. The substrate is a pulverulent, insoluble, only slightly swellable copolymer of one or more N-vinyllactams of 4 to 6 carbon atoms with a cyclic amide which contains two or more ethylenically unsaturated, copolymerizable groups, one or more of which are bonded directly to amide nitrogen. The polyhydric aliphatic alcohol can be combined with one or more water-soluble monohydric alcohols having from 1 to 4 carbon atoms. The filter cake can be treated with a crosslinking agent such as a water-soluble glycidyl ether which is prepared by reacting an epoxide with a polyfunctional alcohol to form an adduct and reacting the adduct with epichlorohydrin followed by cyclization to give an epoxide. The immobilized lipase is used for resolving a racemate of an ester of a racemic alcohol such as a racemate of glycidyl butyrate.

    摘要翻译： 脂肪酶通过将底物，粗猪胰脂肪酶，pH 5-9的缓冲水溶液和一种或多种具有2至6个碳原子的水溶性多羟基脂肪醇和2-6个羟基的温度混合而固定化， 0℃至40℃，以形成混合物，使混合物静置1分钟至3天，过滤混合物以产生滤饼并洗涤滤饼以获得固定化的脂肪酶。 底物是一种或多种具有4至6个碳原子的N-乙烯基内酰胺的粉末状，不溶性，仅略微溶胀的共聚物，其中环酰胺包含两个或多个烯属不饱和的可共聚基团，其中一个或多个直接与酰胺键合 氮。 多元脂肪醇可与一种或多种具有1至4个碳原子的水溶性一元醇组合。 滤饼可以用交联剂如水溶性缩水甘油醚处理，其通过使环氧化物与多官能醇反应以制备加合物并使加合物与表氯醇反应，随后环化反应得到环氧化物。 固定化的脂肪酶用于拆分外消旋醇的酯的外消旋体，例如丁酸缩水甘油酯的外消旋物。

    Crosslinking systems for acrylic latex films
    26.
    发明授权
    Crosslinking systems for acrylic latex films 有权
    用于丙烯酸乳胶膜的交联体系

    公开(公告)号：US06727314B2

    公开(公告)日：2004-04-27

    申请号：US10023400

    申请日：2001-12-13

    申请人： Armin Burghart ,  Robert Shane Porzio ,  Dieter Urban

    发明人： Armin Burghart ,  Robert Shane Porzio ,  Dieter Urban

    IPC分类号： C08F22010

    CPC分类号： C08L33/04 ,  C08L2666/04

    摘要： A composition comprising a polymer, wherein the polymer comprises at least one of: i) a blend of a first polymer comprising a reaction product of acetoacetoxyethyl (meth)acrylate monomer and a second polymer comprising a reaction product of castor oil (meth)acrylate monomer, and ii) a third polymer comprising a reaction product of acetoacetoxyethyl (meth)acrylate monomer and castor oil (meth)acrylate monomer. These polymer compositions can be cured by at least one of auto-oxidation and actinic radiation. Optionally, at least a portion of the acetoacetoxyethyl (meth)acrylate moieties in the polymer can be converted to a corresponding enamine by reaction with at least one of ammonia and an amine.

    摘要翻译： 一种包含聚合物的组合物，其中所述聚合物包含以下中的至少一种：i）包含乙酰乙酰氧基乙基（甲基）丙烯酸酯单体的反应产物的第一聚合物和包含蓖麻油（甲基）丙烯酸酯单体的反应产物的第二聚合物的共混物 ，和ii）包含乙酰乙酰氧基乙基（甲基）丙烯酸酯单体和蓖麻油（甲基）丙烯酸酯单体的反应产物的第三聚合物。 这些聚合物组合物可以通过自氧化和光化辐射中的至少一种来固化。 任选地，聚合物中至少一部分乙酰乙酰氧基乙基（甲基）丙烯酸酯部分可通过与氨和胺中的至少一种反应而转化成相应的烯胺。