The invention relates to modified polysaccharide ethers having a weight-averaged molecular weight of 40000 to 50000 g/mole, zero shear viscosity of more than 10 Pas, and pseudoplasticity of more than 20, obtainable by reacting cellulose-based polysaccharide ether(s) with at least one mesogenic modification agent or modified polysaccharide ethers, obtainable by reacting polysaccharide ether(s) selected from the group consisting of hydroxypropylmethyl cellulose (HPMC), hydroxyethylmethyl cellulose (HEMC), methyl cellulose, and cellulose ethers with methyl and/or ethyl and/or propyl groups and mixtures thereof, with at least one mesogenic modification agent. Said substances can be used to produce gel-like to stable aqueous preparations having viscoelastic flow properties, which are suited for use in the human body, particularly within the scope of ophthalmologic procedures.
本发明涉及一种具有重量平均分子量为40000至50000克/摩尔,零剪切粘度大于10帕斯,伪塑性大于20的改性
多糖醚,其可通过将基于
纤维素的
多糖醚与至少一种介向改性剂或改性
多糖醚反应获得,或通过将选自
羟丙基甲基纤维素(HPMC)、羟乙基
甲基纤维素(H
EMC)、
甲基纤维素和甲基和/或乙基和/或丙基基团和其混合物的
纤维素醚与至少一种介向改性剂反应获得。这些物质可用于制备凝胶状到稳定的
水性制剂,具有黏弹性流动特性,适用于人体内使用,特别是在眼科手术范围内。