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22 条记录 (耗时 0.024 秒)

    Modified polyaspartic acid, method for production thereof and use thereof
    1.
    发明授权
    Modified polyaspartic acid, method for production thereof and use thereof 失效
    改性聚天冬氨酸，其制备方法和用途

    公开(公告)号：US06355771B1

    公开(公告)日：2002-03-12

    申请号：US09371736

    申请日：1999-08-10

    申请人： Yoshihisa Oda

    发明人： Yoshihisa Oda

    IPC分类号： C08G6900

    CPC分类号： C23F11/173 ,  C08G69/10 ,  C08G73/1092 ,  C23F14/02

    摘要： A modified polyaspartic acid having a defined branched structure in the main chain thereof is provided. An anhydro polyaspartic acid is modified by a novel method of modification using a mercapto amine precursor, mercapto amine, or a salt of mercapto amine, using a mercapto amine precursor, mercapto amine, or a salt of mercapto amine and aspartic acid or a salt of aspartic acid as a modifying agent, and using no reaction solvent.

    摘要翻译： 提供了在其主链中具有确定的支链结构的改性聚天冬氨酸。 使用巯基胺前体，巯基胺或巯基胺的巯基胺前体，巯基胺或巯基胺和天冬氨酸盐或其盐或其盐，通过新的改性方法改性脱水聚天冬氨酸 天冬氨酸作为改性剂，不使用反应溶剂。

    Process for preparing biodegradable polymers having repeating succinyl units
    2.
    发明授权
    Process for preparing biodegradable polymers having repeating succinyl units 失效
    制备具有重复琥珀酰单元的可生物降解聚合物的方法

    公开(公告)号：US06395870B1

    公开(公告)日：2002-05-28

    申请号：US09408899

    申请日：1999-09-29

    申请人： Ruediger Schubart

    发明人： Ruediger Schubart

    IPC分类号： C08G6900

    CPC分类号： C11D3/3719 ,  C02F5/10 ,  C08G69/10 ,  C08G73/1092

    摘要： A process for preparing biodegradable polymers having repeating succinyl units, characterized in that an optionally substituted 1,4-butanedicarboxylic acid, or a 1,4-butanedicarboxylic acid derivative is reacted with an acid anhydride.

    摘要翻译： 一种制备具有重复琥珀酰单元的可生物降解聚合物的方法，其特征在于将任选取代的1,4-丁烷二羧酸或1,4-丁烷二羧酸衍生物与酸酐反应。

    Process for the preparation of polyamide granules
    3.
    发明授权
    Process for the preparation of polyamide granules 有权
    聚酰胺颗粒的制备方法

    公开(公告)号：US06562940B2

    公开(公告)日：2003-05-13

    申请号：US09946679

    申请日：2001-09-06

    申请人： Frank T. Kühn ,  Rudy Rulkens

    发明人： Frank T. Kühn ,  Rudy Rulkens

    IPC分类号： C08G6900

    CPC分类号： C08J3/12 ,  C08G69/04 ,  C08G69/28 ,  C08G69/46 ,  C08J2377/00

    摘要： The invention relates to a granule and granulate and to a process for the preparation of polyamide granules at least comprising a) polymerizing at least one dicarboxylic acid and at least one diamine until a low-molecular prepolymer powder is obtained; b) processing the prepolymer powder obtained in step (a) to form granules, with the prepolymer powder being extruded at a temperature, measured under the chosen extrusion conditions, below the melting point of the prepolymer. The process of the invention allows the production of granules that have a higher granule strength than that according to the state of the art. The process of the invention also produces fewer fines. It is preferred for polyamide-4,6 to be chosen as polyamide. The granules and the granulate obtained by the process of the invention are particularly suited for post-condensation.

    摘要翻译： 本发明涉及一种颗粒和颗粒以及一种制备聚酰胺颗粒的方法，至少包括：a）聚合至少一种二羧酸和至少一种二胺，直至获得低分子量预聚物粉末; b）加工得到的预聚物粉末 在步骤（a）中形成颗粒，其中预聚物粉末在选定的挤出条件下测量的温度下挤出，低于预聚物的熔点。本发明的方法允许生产具有较高颗粒强度的颗粒 比根据现有技术。 本发明的方法还产生较少的细粉。 优选选择聚酰胺-4,6作为聚酰胺。通过本发明的方法获得的颗粒和颗粒特别适用于后冷凝。

    Continuous preparation of polyamides from aminonitriles
    6.
    发明授权
    Continuous preparation of polyamides from aminonitriles 有权
    从氨基腈连续制备聚酰胺

    公开(公告)号：US06316588B1

    公开(公告)日：2001-11-13

    申请号：US09600957

    申请日：2000-07-25

    申请人： Ralf Mohrschladt ,  Volker Hildebrandt ,  Eberhard Fuchs

    发明人： Ralf Mohrschladt ,  Volker Hildebrandt ,  Eberhard Fuchs

    IPC分类号： C08G6900

    CPC分类号： C08G69/00 ,  C08G69/04 ,  C08G69/08 ,  C08G69/16 ,  C08G69/28 ,  C08K3/011

    摘要： A continuous process for preparing a polyamide by reacting at least one aminonitrile with water comprises: (1) reacting at least one aminonitrile with water at a temperature from 90 to 400° C. and a pressure from 0.1 to 35×106 Pa in a flow tube containing a Brönsted acid catalyst selected from a beta-zeolite catalyst, a sheet-silicate catalyst or a titanium dioxide catalyst comprising from 70 to 100% by weight of anatase and from 0 to 30% by weight of rutile and in which up to 40% by weight of the titanium dioxide may be replaced by tungsten oxide to obtain a reaction mixture, (2) further reacting the reaction mixture at a temperature from 150 to 400° C. and a pressure which is lower than the pressure in step 1, in the presence of a Brönsted acid catalyst as in (1), the temperature and pressure being selected so as to obtain a first gas phase and a first liquid or a first solid phase or a mixture of first solid and first liquid phase, and the first gas phase is separated from the first liquid or the first solid phase or from the mixture of first liquid and first solid phase, and (3) admixing the first liquid or the first solid phase or the mixture of first liquid and first solid phase with a gaseous or liquid phase comprising water at a temperature from 150 to 370° C. and a pressure from 0.1 to 30×106 Pa to obtain a product mixture.

    摘要翻译： 通过使至少一种氨基腈与水反应制备聚酰胺的连续方法包括：（1）在90-400℃的温度和0.1至35×10 6 Pa的压力下使至少一种氨基腈与水反应， 选自β-沸石催化剂，片状硅酸盐催化剂或二氧化钛催化剂的布朗斯台德酸催化剂，其包含70至100重量％的锐钛矿和0至30重量％的金红石，其中至多40重量％ 二氧化钛的重量可以被氧化钨代替以获得反应混合物，（2）使反应混合物在150-400℃的温度和低于步骤1的压力的压力下反应，在 存在如（1）中所述的布朗斯台德酸催化剂，选择温度和压力以获得第一气相和第一液体或第一固相或第一固体和第一液相的混合物，并且第一气体 相与杉木分离 第一液体或第一固相或第一液体和第一固相的混合物，和（3）将第一液体或第一固相或第一液体和第一固相的混合物与包含水的气相或液相混合 温度为150〜370℃，压力为0.1〜30×10 6 Pa，得到产物混合物。

    Degradable polymers
    9.
    发明授权
    Degradable polymers 失效
    可降解聚合物

    公开(公告)号：US06828412B1

    公开(公告)日：2004-12-07

    申请号：US10069929

    申请日：2002-07-19

    申请人： Stephen James Brocchini ,  Marie-Claude Dubois Clochard

    发明人： Stephen James Brocchini ,  Marie-Claude Dubois Clochard

    IPC分类号： C08G6900

    CPC分类号： C08G69/48 ,  C08G63/02 ,  C08G63/66 ,  C08G69/02 ,  C08G69/04 ,  C08G69/26 ,  C08H1/00

    摘要： A polymer comprising: a polymeric backbone comprising at least one unit having the structure (I), wherein R-R4 comprise groups selected from the group consisting of H, C1-C12 alkyl, C6-C18 aryl, C7-C18 aralkyl, C6-C18 cycloalkyl or any of the group consisting of C1-C12 alkyl, C6-C18 aryl, C7-C18 aralkyl, C6-C18 cycloalkyl substituted, within the carbon chain or appended thereto, with one or more heteroatoms; R and R2 or R and R4 or R and R1 or R2 and R3 may be joined so that with the carbon atom(s) to which they are attached they together form a saturated, partially unsaturated or unsaturated ring system respectively, may have a pendent group which may incorporate a linker unit, (for example a peptide linkage) or a unit having the structure (I); A comprises a proton donating moiety selected from the group consisting of formula (1). B comprises a hydrolytically labile group and is selected from the group consisting of formula (2), wherein each R5 is individually selected from the group consisting of H, C1-C12 alkyl, C6-C18 aryl, C7-C18 aralkyl, C6-C18 cycloalkyl; wherein groups A and B are in a cis-configuration about bond Ca—Cb; m is an integer of 0 to 100, n, p and q are each an integer of 0 or 1; Q comprises 1 or more structures selected from the group consisting of formula (3) wherein R6-R11 are individually selected from the same group as defined for group R above and r is an integer between 1 and 5000, preferably 1 to 10, most preferably 1 to 6; methods for the production, and uses thereof.

    摘要翻译： 一种聚合物，其包括：包含至少一个具有结构（I）的单元的聚合物主链，其中RR 4包含选自H，C 1 -C 12烷基，C 6 -C 18芳基，C 7 -C 18芳烷基，C 6 -C 18环烷基或由碳原子链或其附着的一个或多个杂原子取代的C 1 -C 12烷基，C 6 -C 18芳基，C 7 -C 18芳烷基，C 6 -C 18环烷基中的任何一种; R和R 2或R和R 4或R和R 1或R 2和R 3可以连接成与它们所连接的碳原子一起形成 饱和的，部分不饱和的或不饱和的环系统可以具有可以结合接头单元（例如肽键）或具有结构（I）的单元的侧基; A包含选自式（1）的质子供体部分。 B包含水解不稳定基团，并且选自式（2），其中每个R 5分别选自H，C 1 -C 12烷基，C 6 -C 18芳基，C 7 -C 18芳烷基， C6-C18环烷基; 其中基团A和B是关于键Ca-Cb的顺式构型; m为0〜100的整数，n，p和q各自为0或1的整数; Q包括选自式（3）的一种或多种结构，其中R 6 -R 11分别选自与上述R基团所定义相同的基团，r是1至5000之间的整数，优选 1〜10，最优选1〜6; 生产方法及其用途。