发明授权
- 专利标题: Preparation of a polyvinylpyrrolidone by heat treatment of an aqueous solution of a conventional polyvinylpyrrolidone
- 专利标题(中): 通过热处理常规聚乙烯吡咯烷酮的水溶液制备聚乙烯吡咯烷酮
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申请号: US197022申请日: 1980-10-16
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公开(公告)号: US4330451A公开(公告)日: 1982-05-18
- 发明人: Ferdinand Straub , Heinrich Hartmann , Paul Naegele , Karl Seib
- 申请人: Ferdinand Straub , Heinrich Hartmann , Paul Naegele , Karl Seib
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX2942657 19791022
- 主分类号: C08F26/00
- IPC分类号: C08F26/00 ; C08F8/00 ; C08F26/10 ; C08J3/05 ; C08L39/00 ; C08L39/06
摘要:
A process for the preparation of high-viscosity polyvinylpyrrolidone, wherein an aqueous polyvinylpyrrolidone solution is subjected to a heat treatment in the presence of a water-insoluble peroxide and in the absence of oxygen, and thickeners containing the polyvinylpyrrolidone thus prepared.
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