NOVEL HYDROXYALKYL METHYLCELLULOSE AND ITS USE
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United States of America
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Oct 31, 2024
app pub date -
Aug 18, 2022
filing date -
Aug 18, 2022
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Abstract
A hydroxyalkyl methylcellulose wherein the substitution pattern of the hydroxyalkyl groups of the anhydroglucose units of the hydroxyalkyl methylcellulose is such that the s6(hydroxyalkyl) is 0.01-0.1, wherein s6 is the molar fraction of the anhydroglucose units of the hydroxyalkyl methylcellulose wherein the hydroxy groups in the 6 position of the anhydroglucose unit are substituted by hydroxyalkyl, and wherein the substitution pattern of the methoxyl groups of the anhydroglucose units of the hydroxyalkyl methylcellulose is such that the s23/s26(methyl) ratio is from 0.36 to 0.60, wherein s23 is the molar fraction of anhydroglucose units wherein only the hydroxy groups in the 2 and 3 positions of the anhydroglucose unit are substituted with methyl, and wherein s26 is the molar fraction of anhydroglucose units wherein only the hydroxy groups in the 2 and 6 positions of the anhydroglucose units are substituted with methyl.
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