- 专利标题： Capsule shell comprising a core-shell polymer and a cellulose
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申请号： US17438886申请日： 2020-03-05
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公开(公告)号： US11904056B2公开(公告)日： 2024-02-20
- 发明人: Bettina Hölzer , Manfred Aßmus , Kathrin Nollenberger
- 申请人： Evonik Operations GmbH
- 申请人地址： DE Essen
- 专利权人： Evonik Operations GmbH
- 当前专利权人： Evonik Operations GmbH
- 当前专利权人地址： DE Essen
- 代理机构： Grüneberg and Myers PLLC
- 优先权： EP 162778 2019.03.14
- 国际申请： PCT/EP2020/055848 2020.03.05
- 国际公布： WO2020/182611A 2020.09.17
- 进入国家日期： 2021-09-13
- 主分类号： A61K9/48
- IPC分类号： A61K9/48 ; A61J3/07 ; B29C41/14 ; B29K33/00 ; B29K105/00
摘要：
A capsule shell contains 40 to 99% by weight of a core-shell polymer and 1 to 60% by weight of a cellulose. The core-shell polymer contains 50 to 90% by weight of a core, containing polymerized units of 65 to 75% by weight of ethyl acrylate and 25 to 35% by weight of methyl methacrylate; and 10 to 50% by weight of a shell, containing polymerized units of 45 to 55% by weight of ethyl acrylate and 45 to 55% by weight of methacrylic acid.
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