申请人:Dow Global Technologies LLC
公开号:US20150218198A1
公开(公告)日:2015-08-06
Novel hydroxyalkyl methyl cellulose acetate succinates which a) have from 4.0 to less than 10.0 weight percent of succinoyl groups, b) have a weight average molecular weight M
w
of from 80,000 Dalton to 350,000 Dalton, and c) exhibit a turbidity of up to 41 NTU as a 1.5 weight percent solution in acetone; and novel hydroxyalkyl methyl cellulose acetate succinates which a) have from 10.0 to 20.0 weight percent of succinoyl groups, b) have a weight average molecular weight M
w
of from 80,000 Dalton to 350,000 Dalton, and c) exhibit a turbidity of up to 37 NTU as a 1.5 weight percent solution in acetone are useful for preparing solid dispersion of active ingredients in these hydroxyalkyl methyl cellulose acetate succinates.
新型羟基烷基甲基纤维素醋酸琥珀酸酯,其a)具有4.0至少于10.0重量百分比的琥珀酰基,b)具有80,000道尔顿至350,000道尔顿的重量平均分子量Mw,c)在1.5重量百分比的丙酮溶液中呈现出高达41 NTU的浑浊度;以及新型羟基烷基甲基纤维素醋酸琥珀酸酯,其a)具有10.0至20.0重量百分比的琥珀酰基,b)具有80,000道尔顿至350,000道尔顿的重量平均分子量Mw,c)在1.5重量百分比的丙酮溶液中呈现出高达37 NTU的浑浊度,可用于制备这些羟基烷基甲基纤维素醋酸琥珀酸酯中活性成分的固体分散体。