PROCESS FOR PREPARING AN ESTER OF A CELLULOSE ETHER
    3.
    发明公开
    PROCESS FOR PREPARING AN ESTER OF A CELLULOSE ETHER 审中-公开
    制备纤维素醚酯的方法

    公开(公告)号:EP3212674A1

    公开(公告)日:2017-09-06

    申请号:EP15791420.1

    申请日:2015-10-21

    摘要: A process for producing an esterified cellulose ether comprises the step of reacting a cellulose ether with an aliphatic monocarboxylic acid anhydride and/or a dicarboxylic acid anhydride and with a depolymerizing agent, wherein the cellulose ether has an initial viscosity of at least 500 mPa·s, measured as a 2 weight-% solution in water at 20° C., and the reaction of the cellulose ether with the aliphatic monocarboxylic acid anhydride and/or the dicarboxylic acid anhydride and with the depolymerizing agent is conducted simultaneously or in sequence in one reaction device.

    摘要翻译: 生产酯化纤维素醚的方法包括使纤维素醚与脂族单羧酸酐和/或二羧酸酐和解聚剂反应的步骤,其中纤维素醚的初始粘度至少为500mPa.s ,其在20℃在水中的2重量%溶液中测量,并且纤维素醚与脂族单羧酸酐和/或二羧酸酐和解聚剂的反应在一个反应​​中同时或依次进行 设备。

    ESTERIFIED CELLULOSE ETHERS OF LOW ACETONE-INSOLUBLE CONTENT
    4.
    发明公开
    ESTERIFIED CELLULOSE ETHERS OF LOW ACETONE-INSOLUBLE CONTENT 审中-公开
    低丙酮不溶物含量的酯化纤维素醚

    公开(公告)号:EP3186285A1

    公开(公告)日:2017-07-05

    申请号:EP15760541.1

    申请日:2015-08-18

    摘要: Esterified cellulose ethers which have i) as ester groups aliphatic monovalent acyl groups or groups of the formula - C(O) - R - COOA or a combination of aliphatic monovalent acyl groups and groups of the formula -C(O) - R - COOA, wherein R is a divalent aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation, and ii) a content of not more than 0.85 weight percent acetone-insoluble esterified cellulose ether particles, when the esterified cellulose ether is present in a mixture of 12.5 weight parts of esterified cellulose ether and 87.5 weight parts of acetone at 21 °C, the weight percent acetone-insoluble esterified cellulose ether particles being based on the total weight of the esterified cellulose ether, wherein iii) not more than 14 percent of the acetone-insoluble esterified cellulose ether particles have a particle size of more than 90 micrometers.

    摘要翻译: 酯化纤维素醚,其具有i)作为酯基团的脂肪族单价酰基或式-C(O)-R-COOA的基团或脂肪族单价酰基与式-C(O)-R-COOA的基团的组合 ,其中R是二价脂族或芳族烃基,A是氢或阳离子,和ii)当酯化纤维素醚存在于含有不超过0.85wt%不溶于丙酮的酯化纤维素醚颗粒中时, 12.5重量份的酯化纤维素醚和87.5重量份的丙酮在21℃下,丙酮不溶性酯化纤维素醚颗粒的重量百分比基于酯化纤维素醚的总重量,其中iii)不超过14% 不溶于丙酮的酯化纤维素醚颗粒的粒度大于90微米。