发明名称 |
Low-substituted hydroxypropylcellulose powder and method for producing the same |
摘要 |
<p>Provided are a low-substituted hydroxypropylcellulose powder having high compressibility, good flowability and excellent disintegration, and a method for producing the same. More specifically, provided is a method for producing a low-substituted hydroxypropylcellulose powder having a molar substitution number per anhydrous glucose unit of 0.05 to 1.0, which is insoluble in water and swollenable by absorbing water, comprising the steps of: adding an aqueous sodium hydroxide solution to powdered pulp in such a manner that weight ratio of sodium hydroxide with respect to anhydrous cellulose is 0.1 to 0.3 so as to produce alkali cellulose; etherifying the obtained alkali cellulose to obtain a crude product; neutralizing the sodium hydroxide contained in the obtained crude reaction product; washing the resultant; drying; and pulverizing using by compaction-grinding.</p> |
申请公布号 |
EP1903059(A2) |
申请公布日期 |
2008.03.26 |
申请号 |
EP20070015394 |
申请日期 |
2007.08.06 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
MARUYAMA, NAOSUKE;UMEZAWA, HIROSHI |
分类号 |
C08B11/08 |
主分类号 |
C08B11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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