发明授权
US4208509A Process for the preparation of polyterephthaloyl-and polydiphenyl
ether-4,4-dicarboxylic acid oxalamidrazone
失效
聚对苯二酰基和聚二苯醚-4,4-二羧酸草酰肼的制备方法
- 专利标题： Process for the preparation of polyterephthaloyl-and polydiphenyl ether-4,4-dicarboxylic acid oxalamidrazone
- 专利标题（中）： 聚对苯二酰基和聚二苯醚-4,4-二羧酸草酰肼的制备方法
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申请号： US871135申请日： 1978-01-20
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公开(公告)号： US4208509A公开(公告)日： 1980-06-17
- 发明人: Michael Wallrabenstein , Joachim Behnke , Walter Brodowski
- 申请人： Michael Wallrabenstein , Joachim Behnke , Walter Brodowski
- 申请人地址： NC Asheville
- 专利权人： Akzona Incorporated
- 当前专利权人： Akzona Incorporated
- 当前专利权人地址： NC Asheville
- 优先权： DEX2703072 19780126
- 主分类号： C08G73/00
- IPC分类号： C08G73/00 ; C08G69/28 ; C08G73/02 ; C08G73/08 ; C08G69/32
摘要：
A process for the production of high molecular weight, fiber- and film-trimming polyterephthaloyl oxalamidrazone and polydiphenylether-4,4'-dicarboxylic acid oxalamidrazone where a solution of pure terephtaloyl chloride or diphenyl-ether-4,4'-dicarboxylic acid dichloride in an inert solvent free from amines and water is slowly added, at a temperature between 10.degree. C. and 35.degree. C., to a solution of pure oxalic acid bisamidrazone in dimethyl acetamide and/or N-methyl pyrrolidone, free from amines and water, containing 4 to 6 percent by weight of anhydrous lithium chloride, the total quantity of the solvents used amounting to 1.25 to 3.30 liters per mole of oxalic acid bisamidrazone.
公开/授权文献
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