发明名称 |
Phosphate salts of monomers for PBZ and their use in preparing PBZ polymers. |
摘要 |
<p>PBZ polymers are synthesized by the reaction of AA- and BB-monomers. The BB-monomer is conveniently synthesized and isolated as a phosphate salt having a uniform number of phosphate ions associated with each BB-monomer ion. Such high purity monophosphate and diphosphate salts can be obtained by precipitating the monomer from an aqueous acid solution by adjusting the pH balance or from a mixture of phosphoric acid and a volatile, polar, saturated organic liquid at a relatively low temperature.</p> |
申请公布号 |
EP0393559(A2) |
申请公布日期 |
1990.10.24 |
申请号 |
EP19900107177 |
申请日期 |
1990.04.14 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
HARRIS, WILLIAM J.;KLEISS, LUKE RANDALL;LIU, MING-BIANN;LYSENKO, ZENON;ROSENBERG, STEVEN |
分类号 |
C07C209/82;C07C211/50;C07C213/10;C07C215/80;C07C323/34;C08G73/18;C08G73/22;C08G75/02 |
主分类号 |
C07C209/82 |
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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