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13 条记录 (耗时 0.04 秒)

    Process for the preparation of activated chitosans and their use in the preparation of chiotsan derivatives
    1.
    发明授权
    Process for the preparation of activated chitosans and their use in the preparation of chiotsan derivatives 失效
    激活的壳聚糖的制备方法及其在制备滑鼠衍生物中的应用

    公开(公告)号：US5442048A

    公开(公告)日：1995-08-15

    申请号：US166738

    申请日：1993-12-14

    申请人： Christoph Meister ,  Reinhard Donges

    发明人： Christoph Meister ,  Reinhard Donges

    IPC分类号： C08B37/08 ,  C07H1/00

    CPC分类号： C08B37/003

    摘要： The invention relates to a process for the preparation of activated chitosans, in which process a chitosan is reacted with an acid for salt formation, preferably followed by a reaction with a base. The addition of acid and the addition of bases which is preferably to be effected in the activation are carried out in a suspending agent which largely prevents the chitosan salts from dissolving, suitable suspending agents can be both aqueous solutions of inorganic salts and organic or aqueous-organic solvents. The invention also relates to a process for the preparation of both water-soluble and water-insoluble chitosan derivatives by reacting the activated chitosans with reagents which are generally suitable for the reaction of polysaccharides or amines.

    摘要翻译： 本发明涉及一种制备活化的壳聚糖的方法，其中使壳聚糖与酸形成盐反应，优选与碱反应。 在活化中优选加入酸和加入碱可以在大大防止壳聚糖盐溶解的悬浮剂中进行，合适的悬浮剂可以是无机盐的水溶液和有机或含水溶剂， 有机溶剂。 本发明还涉及通过使活化的壳聚糖与通常适用于多糖或胺反应的试剂反应来制备水溶性和水不溶性壳聚糖衍生物的方法。

    Use of carboxymethylated methyl hydroxyethyl cellulose ethers or methyl hydroxypropyl cellulose ethers
    3.
    发明授权
    Use of carboxymethylated methyl hydroxyethyl cellulose ethers or methyl hydroxypropyl cellulose ethers 失效
    使用羧甲基化甲基羟乙基纤维素醚或甲基羟丙基纤维素醚

    公开(公告)号：US5372642A

    公开(公告)日：1994-12-13

    申请号：US72564

    申请日：1993-06-07

    申请人： Uwe Bartz ,  Reinhard Donges ,  Heiner Klehr

    发明人： Uwe Bartz ,  Reinhard Donges ,  Heiner Klehr

    IPC分类号： C04B24/02 ,  C04B24/38 ,  C04B28/02

    CPC分类号： C04B24/383 ,  C04B2103/46

    摘要： The present invention relates to the use of carboxymethylated methyl hydroxyethyl cellulose ethers or methyl hydroxypropyl cellulose ethers having a DS.sub.alkyl from 1.0 to 2.0, a DS.sub.carboxyalkyl from 0.005 to 0.6 and an MS.sub.hydroxyalkyl from 0.05 to 1 as an additive to mixtures of hydrated lime and cement, and to the mixtures of hydrated lime and cement obtained in this way.

    摘要翻译： 本发明涉及使用1.0至2.0的DS烷基的羧甲基化甲基羟乙基纤维素醚或甲基羟丙基纤维素醚，0.005至0.6的DS羧基烷基和0.05至1的MShroroxkyl烷基作为水合石灰和水泥混合物的添加剂， 以及以这种方式获得的熟石灰和水泥的混合物。

    Photopolymerizable mixture and photopolymerizable copying material prepared therewith
    5.
    发明授权
    Photopolymerizable mixture and photopolymerizable copying material prepared therewith 失效
    可光聚合的混合物和可光聚合的复制材料

    公开(公告)号：US4530747A

    公开(公告)日：1985-07-23

    申请号：US504180

    申请日：1983-06-14

    申请人： Reinhard Donges ,  Klaus Horn

    发明人： Reinhard Donges ,  Klaus Horn

    IPC分类号： C08F291/00 ,  G03F7/027 ,  C08J3/28 ,  C08L33/02 ,  C08L33/04 ,  C08L69/00

    CPC分类号： G03F7/027 ,  C08F291/00

    摘要： Disclosed are a photopolymerizable mixture and photopolymerizable copy materials made therefrom. The mixture contains a polymerizable compound having terminal acrylic or methacrylic acid ester groups, selected from a compound of one of the general formulas ##STR1## wherein R.sub.1 is a phenylene group or a biphenyldiyl group or a group formed by two phenylene groups which are linked by a bridge comprising an oxygen atom, a sulphur atom, a sulfone group, a substituted or unsubstituted alkylene group or cycloalkylene group, or a group of the formula --(O-alkylene).sub.n O-- with n=1-3,R.sub.2 is an oxygen atom or the group CH.sub.2 --CH.sub.2 --CO;R.sub.3 is a hydrogen atom or a methyl radical; andR.sub.4 is a hydrogen atom or the radical ##STR2##

    摘要翻译： 公开了由其制成的可光聚合混合物和可光聚合的复制材料。 该混合物包含具有末端丙烯酸或甲基丙烯酸酯基的可聚合化合物，其选自通式（I）和（VI）之一的化合物，其中R 1是亚苯基或联苯二基或 由通过包含氧原子，硫原子，砜基，取代或未取代的亚烷基或亚环烷基的桥连接的两个亚苯基形成的基团，或式 - （O-亚烷基）nO-的基团与 n = 1-3，R2是氧原子或基团CH2-CH2-CO; R3是氢原子或甲基; 并且R4是氢原子或基团

    Photopolymerizable mixture and photopolymerizable copying material prepared therewith
    6.
    发明授权
    Photopolymerizable mixture and photopolymerizable copying material prepared therewith 失效
    可光聚合的混合物和可光聚合的复制材料

    公开(公告)号：US4458006A

    公开(公告)日：1984-07-03

    申请号：US504136

    申请日：1983-06-14

    申请人： Reinhard Donges ,  Klaus Horn

    发明人： Reinhard Donges ,  Klaus Horn

    IPC分类号： C08F2/00 ,  C08F2/46 ,  C08F2/48 ,  C08F2/50 ,  C08F2/54 ,  C08F20/00 ,  C08F20/10 ,  C08F20/38 ,  G03F7/027 ,  G03C1/68 ,  G03C1/74

    CPC分类号： G03F7/027

    摘要： Disclosed are a photopolymerizable mixture and photopolymerizable copy materials made therefrom. The mixture contains a polymerizable compound having terminal acrylic or methacrylic acid ester groups and being selected from a compound of the formula I ##STR1## wherein R.sub.1 is a naphthylene group, a biphenyldiyl group or a dinaphthyl-methanediyl group or a group formed by two phenylene groups which are linked by a bridge comprised of an oxygen atom, a sulphur atom, a sulfone group or an alkylene group which is substituted by at least one carboxylic acid group, carboxylic acid alkyl ester groups, halogen atom or phenyl group, or by such a substituted alkylene group which is connected to the group R.sub.1 of another molecule via said substituent;R.sub.2 is a hydrogen atom or a methyl group; andm is 0 or 1, m being 1 if R.sub.1 is a naphthylene group or a biphenyldiyl group.

    摘要翻译： 公开了由其制成的可光聚合混合物和可光聚合的复制材料。 该混合物包含具有末端丙烯酸或甲基丙烯酸酯基的可聚合化合物，并且选自式Ⅰ化合物其中R 1是亚萘基，联苯二基或二萘甲基 - 甲二酰基或形成的基团 通过由氧原子，硫原子，砜基或被至少一个羧酸基取代的亚烷基，羧酸烷基酯基，卤素原子或苯基构成的桥连接的两个亚苯基， 或通过经由所述取代基与另一分子的基团R 1连接的取代的亚烷基; R2是氢原子或甲基; m为0或1，如果R1为亚萘基或联苯二基，则m为1。

    Process for the purifying working-up of reaction media and/or wash media obtained during preparation of cellulose ethers
    7.
    发明授权
    Process for the purifying working-up of reaction media and/or wash media obtained during preparation of cellulose ethers 失效
    用于在制备纤维素醚期间获得的反应介质和/或洗涤介质的净化处理的方法

    公开(公告)号：US5500124A

    公开(公告)日：1996-03-19

    申请号：US984698

    申请日：1992-12-03

    申请人： Heinz Wallisch ,  Reinhard Donges ,  Ulrich Meyer-Blumenroth

    发明人： Heinz Wallisch ,  Reinhard Donges ,  Ulrich Meyer-Blumenroth

    IPC分类号： C08B11/20 ,  C02F1/44 ,  C08B11/02 ,  C08B11/04

    CPC分类号： C08B11/20

    摘要： The invention relates to a process for the purifying working-up of liquid reaction media and/or wash media obtained during preparation of cellulose ethers, which are insoluble in hot water, from cellulose, an alkali metal hydroxide and at least one etherifying agent in a medium containing water and if appropriate at least one organic solvent, by ultrafiltration of the media into a permeate and concentrate, which comprises carrying out the ultrafiltration of the reaction media and/or wash media at a temperature at or above the flocculation temperature of the cellulose ethers.

    摘要翻译： 本发明涉及一种在纤维素，碱金属氢氧化物和至少一种醚化剂的制备中不溶于热水的纤维素醚制备中的液体反应介质和/或洗涤介质的净化处理方法。 含有水的介质和适当的至少一种有机溶剂，通过将培养基超滤成渗透物和浓缩物，其包括在等于或高于纤维素的絮凝温度的温度下进行反应介质和/或洗涤介质的超滤 醚类。

    Process for the preparation and work-up of N-hydroxyalkylchitosans soluble in aqueous medium
    10.
    发明授权
    Process for the preparation and work-up of N-hydroxyalkylchitosans soluble in aqueous medium 失效
    用于水溶性介质中N-羟烷基壳聚糖的制备和后处理的方法

    公开(公告)号：US6090928A

    公开(公告)日：2000-07-18

    申请号：US217189

    申请日：1994-03-24

    申请人： Reinhard Donges ,  Diethart Reichel ,  Birgit Kessler

    发明人： Reinhard Donges ,  Diethart Reichel ,  Birgit Kessler

    IPC分类号： C08B37/08 ,  F26B3/12 ,  F26B17/28

    CPC分类号： F26B17/284 ,  C08B37/003 ,  F26B3/12

    摘要： The present invention relates to a process for the preparation and work-up of N-hydroxyalkylchitosans soluble in aqueous media, comprising the measuresdispersion of chitosan in an aqueous medium,subsequent hydroxyalkylation of the dispersed chitosan andsubsequent work-up of the N-hydroxyalkylchitosan, which comprises carrying out the hydroxyalkylation up to an average degree of substitution (DS) of 2.0, preferably 1.5 to 2.0, if desired removing some of the aqueous medium after the hydroxyalkylation and before the work-up and performing the work-up of the N-hydroxyalkylchitosan by drying.

    摘要翻译： 本发明涉及一种可溶于水介质的N-羟烷基壳聚糖的制备和处理方法，包括测定壳聚糖在水性介质中的分散性，随后分散的壳聚糖的羟基烷基化和随后的N-羟烷基壳聚糖的后处理 其包括如果需要，在羟基烷基化后除去一些水性介质，并且在处理之前和进行后处理之前，进行平均取代度（DS）为2.0，优选为1.5-2.0的羟基烷基化 N-羟烷基壳聚糖通过干燥。