发明名称 |
WATER SOLUBLE FILMS |
摘要 |
<p>Water-soluble films suitable for water-dissolvable packaging comprising a polyurethane polymer having defined amounts of poly(ethylene oxide) (and optionally poly(propylene oxide)) groups and acid (preferably carboxyl) groups at least 50% neutralised with a base, at least a proportion of which is of the non-volatile type, the polyurethane being made by chain extension of a urethane prepolymer. Also water-soluble packaging (sachets, capsules, bags) made from the films and their use in packaging various materials, and a process for the production of aqueous polyurethane solutions which may be used for making such films.</p> |
申请公布号 |
EP1060203(B1) |
申请公布日期 |
2002.12.11 |
申请号 |
EP19990906323 |
申请日期 |
1999.02.25 |
申请人 |
AQUASOL LIMITED;ZENECA RESINS BV |
发明人 |
PADGET, JOHN CHRISTOPHER;YEATES, TERENCE;CHESHIRE, PHILLIP;HINDE, DAVID CHARLES;OVERBEEK, GERARDUS CORNELIS;SMAK, YVONNE WILHELMINA |
分类号 |
C08G18/08;C08G18/12;C08G18/28;C08J5/18;(IPC1-7):C08G18/08;C08G18/48 |
主分类号 |
C08G18/08 |
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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