发明授权
US06649180B1 Hard capsule formed of cellulose ether film with a specific content of methoxyl and hydroxypropoxyl groups
有权
硬胶囊由纤维素醚膜形成，具有特定含量的甲氧基和羟丙氧基
- 专利标题： Hard capsule formed of cellulose ether film with a specific content of methoxyl and hydroxypropoxyl groups
- 专利标题（中）： 硬胶囊由纤维素醚膜形成，具有特定含量的甲氧基和羟丙氧基
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申请号： US09549205申请日： 2000-04-13
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公开(公告)号： US06649180B1公开(公告)日： 2003-11-18
- 发明人: Seinosuke Matsuura , Masaru Tanjoh
- 申请人： Seinosuke Matsuura , Masaru Tanjoh
- 优先权： JP11-106689 19990414
- 主分类号： B29D2200
- IPC分类号： B29D2200
摘要：
A cellulose ether film is formed of a composition comprising a cellulose ether as a base in which some of the hydrogen atoms of cellulosic hydroxyl groups are replaced by alkyl groups and/or hydroxyalkyl groups, a gelling agent, and a gelling aid. The total content of alkoxyl and hydroxyalkoxyl groups in the cellulose ether is limited to 23-37.6% by weight, which is effective for preventing the gelling aid from precipitating out and maintaining a favorable outer appearance during long-term storage.
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