发明授权
- 专利标题： Pvc hollow filtration membrane and the preparation method thereof
- 专利标题（中）： Pvc中空过滤膜及其制备方法
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申请号： US10567202申请日： 2004-08-02
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公开(公告)号： US07435348B2公开(公告)日： 2008-10-14
- 发明人: Lianggang Chen
- 申请人： Lianggang Chen
- 申请人地址： CN Shanghai
- 专利权人： Shanghai Litree Purifying Equipment Co., Ltd.
- 当前专利权人： Shanghai Litree Purifying Equipment Co., Ltd.
- 当前专利权人地址： CN Shanghai
- 代理机构： Dorsey & Whitney LLP
- 优先权： CN03127516 20030806
- 国际申请： PCT/CN2004/000887 WO 20040802
- 国际公布： WO2005/014150 WO 20050217
- 主分类号： B01D71/30
- IPC分类号： B01D71/30 ; B01D71/38 ; B01D69/08 ; B01D63/00
摘要：
The present invention provides a polyvinyl chloride hollow filtration membrane, which mainly comprises the following components: 30-95 wt. % of polyvinyl chloride and 5-70 wt. % of vinyl chloride-vinyl acetate-maleic anhydride terpolymer, wherein the polymerization degree of polyvinyl chloride is from 700 to 2500; the content of vinyl acetate is 10-19 % and the content of maleic anhydride is 18-40 % on a basis of total weight of the terpolymer; and the absolute viscosity of the terpolymer is 1.2-1.9 mPa·s. A method for preparing such a polyvinyl chloride hollow filtration membrane is also provided in the present invention.