专利名称：NOVEL CELLULOSE ETHERS AND THEIR USE发明人：Roland Adden,Meinolf Brackhagen,Matthias
Knarr,Jin Zhao
申请号：US13825697申请日：20111006
公开号：US20130236512A1公开日：20130912
摘要：Cellulose ethers are described herein which are useful in capsules or in coatingsfor dosage forms. In these cellulose ethers the ether substituents are methyl groups,hydroxyalkyl groups, and optionally alkyl groups being different from methyl, thecellulose ether has an MS (hydroxyalkyl) of 0.05 to 1.00, and hydroxy groups ofanhydroglucose units are substituted with methyl groups such that
[s23/s26−0.2*MS(hydroxyalkyl)] is 0.35 or less, wherein s23 is the molar fraction ofanhydroglucose units wherein only the two hydroxy groups in the 2- and 3-positions ofthe anhydroglucose unit are substituted with methyl groups and wherein s26 is the molarfraction of anhydroglucose units wherein only the two hydroxy groups in the 2- and 6-positions of the anhydroglucose unit are substituted with methyl groups.
申请人：Roland Adden,Meinolf Brackhagen,Matthias Knarr,Jin Zhao
地址：Walsrode DE,Walsrode DE,Nienburg DE,Midland MI US
国籍：DE,DE,DE,US
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