发明名称 |
Polymer solutions. |
摘要 |
<p>A polymer solution contains a sulphonated polyarylethersulphone in a solvent mixture containing at least three components, where the solvent mixture has a delta-H in the range from 3 to 8.5; a delta-P in the range from 4 to 8 and a delta-D in the range 7.2 to 9.5 and each component of the solvent mixture is a liquid or low melting solid which is a non-solvent or poor solvent for the sulphonated polyarylethersulphone, and at least one of the components satisfies at least one of the conditions:
<UnorderedLists id="ula01" listStyle="none"><ListItem>a) said component has a delta-D of less than 8 when the value of delta-P is not more than 3; and</ListItem><ListItem>b) said component has a delta-H of greater than 3 when the value of delta-P is at least 8.5; and</ListItem><ListItem>c) said component has a delta-H of less than 8 when it contains at least one hydroxylic group; and</ListItem><ListItem>d) said component is free of hydroxylic groups and has a delta-P which is greater than 3 and less than 8.5.</ListItem></UnorderedLists></p><p>The solution can be used for the production of membranes suitable for use in reverse osmosis applications.</p> |
申请公布号 |
EP0203755(A2) |
申请公布日期 |
1986.12.03 |
申请号 |
EP19860303637 |
申请日期 |
1986.05.13 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES PLC |
发明人 |
CARDEW, PETER TOWNSEND;HOLMES, DAVID ROBERT;SMITH, JOHN WILLIAM |
分类号 |
C08J5/18;B01D67/00;B01D71/68;B01D71/82;C08J3/09;C08L81/00;C08L81/06 |
主分类号 |
C08J5/18 |
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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