发明授权
US4337095A Process for the preparation of solutions of cellulose derivatives in
organic solvents having higher concentration and solutions obtained by
said process
失效
用于制备纤维素衍生物在具有较高浓度和通过所述方法获得的溶液的有机溶剂中的溶液的方法
- 专利标题： Process for the preparation of solutions of cellulose derivatives in organic solvents having higher concentration and solutions obtained by said process
- 专利标题（中）： 用于制备纤维素衍生物在具有较高浓度和通过所述方法获得的溶液的有机溶剂中的溶液的方法
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申请号： US155113申请日： 1980-05-30
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公开(公告)号： US4337095A公开(公告)日： 1982-06-29
- 发明人: Roberto Leoni , Alberto Baldini , Angelo Calloni , Gianfranco Angelini
- 申请人： Roberto Leoni , Alberto Baldini , Angelo Calloni , Gianfranco Angelini
- 申请人地址： ITX Milan
- 专利权人： SNIA Viscosa S.p.A. - Societa' Nazionale Industria Applicazioni Viscosa
- 当前专利权人： SNIA Viscosa S.p.A. - Societa' Nazionale Industria Applicazioni Viscosa
- 当前专利权人地址： ITX Milan
- 优先权： ITX23350A/79 19790607
- 主分类号： C08B15/00
- IPC分类号： C08B15/00 ; C08B1/00 ; C08B16/00 ; C08L1/02 ; C08L1/08
摘要：
A process for the preparation of high concentration solutions of celluloseerivatives in organic solvents comprises contacting with paraformaldehyde and the solvent a cellulose which has a polymerization degree lower than 300 and preferably not significantly higher than 200. The solvent is selected from among dimethylformamide, dimethylacetamide and N-methylpyrrolidone.
公开/授权文献
- US5386237A Method and apparatus for adaptive progressive scan conversion 公开/授权日：1995-01-31
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