Cellulose ethers having reactive anchor group, modified cellulose ethers obtainable therefrom and methods for the preparation thereof
    1.
    发明申请
    Cellulose ethers having reactive anchor group, modified cellulose ethers obtainable therefrom and methods for the preparation thereof 有权
    具有反应性锚定基团的纤维素醚,可从其获得的改性纤维素醚及其制备方法

    公开(公告)号:US20140094599A1

    公开(公告)日:2014-04-03

    申请号:US14029970

    申请日:2013-09-18

    Inventor: Mike KLEINERT

    Abstract: Non-ionic water-soluble cellulose ethers modified with 3-azido-2-hydroxypropyl groups bound via an ether link are provided having a molar degree of substitution MSAHP in the range from 0.001 to 0.50. Exemplary cellulose ethers are alkyl celluloses, including methyl, hydroxyalkyl (e.g. hydroxyetbyl or hydroxypropyl) or alkylhydroxyalkyl cellulose (e.g. methylhydroxyethyl). Reaction products with alkyne compounds are also provided, resulting in a terminal alkyne group. The reaction of azide with the alkyne proceeds as a 1,3-dipolar cycloaddition reaction, advantageously with Cu(I) or ruthenium catalysts. A multiplicity of cellulose ethers can be obtained from the conversion reaction. Variations in the macroscopic properties can be achieved by controlled modification, ranging from increased or reduced viscosity. The reaction, taking place within a few seconds, requires only minimal catalyst. Gel formation is reversible by adjustment of the pH such that a monophasic system (high-viscous fluid) arises again from a biphasic system (gel+low-viscous water phase).

    Abstract translation: 提供了通过醚键结合的3-叠氮基-2-羟丙基基团改性的非离子水溶性纤维素醚,其摩尔取代度MSAHP为0.001至0.50。 示例性纤维素醚是烷基纤维素,包括甲基,羟基烷基(例如羟基乙基或羟丙基)或烷基羟烷基纤维素(例如甲基羟乙基)。 还提供了与炔化合物的反应产物,得到末端炔基。 叠氮化物与炔的反应作为1,3-偶极环加成反应,有利地用Cu(I)或钌催化剂进行。 可以从转化反应获得多种纤维素醚。 宏观特性的变化可以通过控制修饰来实现,范围从增加或降低的粘度。 在几秒钟内发生的反应只需要最少的催化剂。 凝胶形成可通过调节pH而逆转,使得单相系统(高粘性流体)再次从双相系统(凝胶+低粘度水相)产生。

    Use of Cellulose Ethers Having 3-Azido-Hydroxyalkyl Groups in Insoluble Adhesives

    公开(公告)号:US20180244960A1

    公开(公告)日:2018-08-30

    申请号:US15758503

    申请日:2016-09-13

    Inventor: Mike KLEINERT

    Abstract: The invention relates to the use of non-ionic, insoluble cellulose ethers having 3-azido-2-hydroxypropyl (AHP) groups, which are linked to the cellulose via an ether link, wherein the molar substitution degree MSAHP is in the region of 0.001 to 0.30, for the production of insoluble, solid adhesives. The cellulose ethers substituted by AHP groups are reacted in the presence of a copper or ruthenium catalyst with alkine compounds, such as phenylacetylene, propargyl alcohol, propiolic acid or heterocyclic compounds, which have a substituent with a terminal alkine group. The reaction of the azide with the alkine occurs as a 1,3-dipolar cyclcoaddition reaction at room temperature within a few seconds, and an insoluble, solid adhesive is obtained. The adhesive is suitable in particular for adhering paper, cardboard or wood.

    Cellulose ethers having reactive anchor group, modified cellulose ethers obtainable therefrom and methods for the preparation thereof
    3.
    发明授权
    Cellulose ethers having reactive anchor group, modified cellulose ethers obtainable therefrom and methods for the preparation thereof 有权
    具有反应性锚定基团的纤维素醚,可从其获得的改性纤维素醚及其制备方法

    公开(公告)号:US09040680B2

    公开(公告)日:2015-05-26

    申请号:US14029970

    申请日:2013-09-18

    Inventor: Mike Kleinert

    Abstract: Non-ionic water-soluble cellulose ethers modified with 3-azido-2-hydroxypropyl groups bound via an ether link are provided having a molar degree of substitution MSAHP in the range from 0.001 to 0.50. Exemplary cellulose ethers are alkyl celluloses, including methyl, hydroxyalkyl (e.g. hydroxyethyl or hydroxypropyl) or alkylhydroxyalkyl cellulose (e.g. methylhydroxyethyl). Reaction products with alkyne compounds are also provided, resulting in a terminal alkyne group. The reaction of azide with the alkyne proceeds as a 1,3-dipolar cycloaddition reaction, advantageously with Cu(I) or ruthenium catalysts. A multiplicity of cellulose ethers can be obtained from the conversion reaction. Variations in the macroscopic properties can be achieved by controlled modification, ranging from increased or reduced viscosity. The reaction, taking place within a few seconds, requires only minimal catalyst. Gel formation is reversible by adjustment of the pH such that a monophasic system (high-viscous fluid) arises again from a biphasic system (gel+low-viscous water phase).

    Abstract translation: 提供了通过醚键结合的3-叠氮基-2-羟丙基基团改性的非离子水溶性纤维素醚,其摩尔取代度MSAHP为0.001至0.50。 示例性纤维素醚是烷基纤维素,包括甲基,羟烷基(例如羟乙基或羟丙基)或烷基羟烷基纤维素(例如甲基羟乙基)。 还提供了与炔化合物的反应产物,得到末端炔基。 叠氮化物与炔的反应作为1,3-偶极环加成反应,有利地用Cu(I)或钌催化剂进行。 可以从转化反应获得多种纤维素醚。 宏观特性的变化可以通过控制修饰来实现,范围从增加或降低的粘度。 在几秒钟内发生的反应只需要最少的催化剂。 凝胶形成可通过调节pH而逆转,使得单相系统(高粘性流体)再次从双相系统(凝胶+低粘度水相)产生。

    CELLULOSE AND CELLULOSE ETHER SOLUTIONS AND USE THEREOF
    4.
    发明申请
    CELLULOSE AND CELLULOSE ETHER SOLUTIONS AND USE THEREOF 有权
    纤维素和纤维素醚解决方案及其用途

    公开(公告)号:US20140171352A1

    公开(公告)日:2014-06-19

    申请号:US14105423

    申请日:2013-12-13

    Abstract: Solutions of cellulose or cellulose ethers in solvent containing triethylheptylammonium chloride, triethyloctylammonium chloride, triethylhexylammonium acetate, triethylheptylammonium acetate, triethyloctylammonium acetate, triethylnonylammonium acetate and/or triethyldecylammonium acetate are provided. The solvent may further include up to 70 wt % of at least one organic solvent, with acetone being the preferred organic solvent. The solution can be formed into a paste for removing paint from wood or metal surfaces. The cellulose (ether) solution can also serve as a reaction medium in which the cellulose and/or the cellulose ether are chemically modified. Finally, the cellulose (ether) solution can be processed into cellulosic shaped articles.

    Abstract translation: 提供纤维素或纤维素醚在含有三乙基庚基氯化铵,三乙基辛基氯化铵,乙酸三乙基己基铵,乙酸三乙基庚基铵,乙酸三乙基辛基铵,乙酸三乙基壬基铵和/或三乙基十一烷基乙酸铵的溶剂中的溶液。 溶剂可进一步包含至多70重量%的至少一种有机溶剂,丙酮是优选的有机溶剂。 该溶液可以形成用于从木材或金属表面除去油漆的糊料。 纤维素(醚)溶液也可以用作其中纤维素和/或纤维素醚被化学改性的反应介质。 最后,纤维素(醚)溶液可以加工成纤维素状制品。

    Cellulose ethers with delayed solubility and having a reduced glyoxal content

    公开(公告)号:US20230151120A1

    公开(公告)日:2023-05-18

    申请号:US17917320

    申请日:2021-04-08

    CPC classification number: C08B15/005 C08B11/20

    Abstract: The invention relates to a method for preparing cellulose derivatives which are reversibly crosslinked with glyoxal and thus display delayed water solubility. In the methods, a water-wetted cellulose derivative is mixed at a temperature of between 20 to 70° C. with an aqueous solution containing glyoxal, a monovalent or polyvalent organic acid, and at least one alkaline earth salt and/or alkali salt of phosphoric acid as a buffer substance to reversibly crosslink the cellulose derivative. The amount of glyoxal is 0.010 to 0.050 mol, in each case in relation to 1 mol of anhydroglucose units of the cellulose derivative, and the molar ratio of monovalent or polyvalent organic acid to glyoxal is in the range of 1:1 to 1:12. The cellulose derivative is then dried and milled, and the drying and milling may also be combined. The invention also relates to cellulose derivatives produced according to the method.

    Method for producing alkyl cellulose

    公开(公告)号:US10881124B2

    公开(公告)日:2021-01-05

    申请号:US14965149

    申请日:2015-12-10

    Abstract: Provided is a method for producing an alkyl cellulose having a high viscosity and not having an excessively high gel strength. More specifically, there is provided a method for producing an alkyl cellulose comprising the steps of: mixing a cellulose pulp with a first alkali metal hydroxide solution with stirring to obtain alkali cellulose; reacting the alkali cellulose with an alkylating agent to obtain a first reaction mixture; blending a second alkali metal hydroxide solution with the first reaction mixture with stirring, without further blending of the alkylating agent, to obtain a second reaction mixture; and purifying the second reaction mixture to obtain an alkyl cellulose. There is also provided an alkyl cellulose being produced by the above method and having a degree of substitution of alkyl group of 27 to 33% by weight.

    METHOD FOR PRODUCING ALKYL CELLULOSE
    7.
    发明申请
    METHOD FOR PRODUCING ALKYL CELLULOSE 审中-公开
    生产烷基纤维素的方法

    公开(公告)号:US20160168271A1

    公开(公告)日:2016-06-16

    申请号:US14965149

    申请日:2015-12-10

    Abstract: Provided is a method for producing an alkyl cellulose having a high viscosity and not having an excessively high gel strength. More specifically, there is provided a method for producing an alkyl cellulose comprising the steps of: mixing a cellulose pulp with a first alkali metal hydroxide solution with stirring to obtain alkali cellulose; reacting the alkali cellulose with an alkylating agent to obtain a first reaction mixture; blending a second alkali metal hydroxide solution with the first reaction mixture with stirring, without further blending of the alkylating agent, to obtain a second reaction mixture; and purifying the second reaction mixture to obtain an alkyl cellulose. There is also provided an alkyl cellulose being produced by the above method and having a degree of substitution of alkyl group of 27 to 33% by weight.

    Abstract translation: 提供一种具有高粘度且不具有过高凝胶强度的烷基纤维素的制备方法。 更具体地,提供了一种制备烷基纤维素的方法,包括以下步骤:在搅拌下将纤维素纸浆与第一碱金属氢氧化物溶液混合以获得碱纤维素; 使碱纤维素与烷基化剂反应得到第一反应混合物; 在搅拌下将第二碱​​金属氢氧化物与第一反应混合物混合,而不进一步共混烷基化剂,得到第二反应混合物; 并纯化第二反应混合物以获得烷基纤维素。 还提供了通过上述方法制备并具有27至33重量%的烷基取代度的烷基纤维素。

    Cellulose ethers having reactive anchor group, modified cellulose ethers obtainable therefrom and methods for the preparation thereof
    8.
    发明申请
    Cellulose ethers having reactive anchor group, modified cellulose ethers obtainable therefrom and methods for the preparation thereof 有权
    具有反应性锚定基团的纤维素醚,可从其获得的改性纤维素醚及其制备方法

    公开(公告)号:US20150183887A1

    公开(公告)日:2015-07-02

    申请号:US14645700

    申请日:2015-03-12

    Inventor: Mike KLEINERT

    Abstract: Non-ionic water-soluble cellulose ethers modified with 3-azido-2-hydroxypropyl groups bound via an ether link are provided having a molar degree of substitution MSAHP in the range from 0.001 to 0.50. Exemplary cellulose ethers are alkyl cell doses, including methyl, hydroxyalkyl (e.g. hydroxyethyl hydroxypropyl) or alkylhydroxyalkyl cellulose (e.g. methylhydroxyethyl). Reaction products with alkyne compounds are also provided, resulting in a terminal alkyne group. The reaction of azide with the alkyne proceeds as a 1,3-dipolar cycloaddition reaction, advantageously with Cu(I) or ruthenium catalysts. A multiplicity of cellulose ethers can be obtained from the conversion reaction. Variations in the macroscopic properties can be achieved by controlled modification, ranging from increased or reduced viscosity. The reaction, taking place within a few seconds, requires only minimal catalyst. Gel formation is reversible by adjustment of the pH such that a monophasic system (high-viscous fluid) arises again from a biphasic system (gel+low-viscous water phase).

    Abstract translation: 提供了通过醚键结合的3-叠氮基-2-羟丙基基团改性的非离子水溶性纤维素醚,其摩尔取代度MSAHP为0.001至0.50。 示例性纤维素醚是烷基细胞剂量,包括甲基,羟烷基(例如羟乙基羟丙基)或烷基羟烷基纤维素(例如甲基羟乙基)。 还提供了与炔化合物的反应产物,得到末端炔基。 叠氮化物与炔的反应作为1,3-偶极环加成反应,有利地用Cu(I)或钌催化剂进行。 可以从转化反应获得多种纤维素醚。 宏观特性的变化可以通过控制修饰来实现,范围从增加或降低的粘度。 在几秒钟内发生的反应只需要最少的催化剂。 凝胶形成可通过调节pH而逆转,使得单相系统(高粘性流体)再次从双相系统(凝胶+低粘度水相)产生。

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