发明名称 |
PROCESS FOR THE CONTINUOUS PREPARATION OF POLYGLYCIDYL ETHERS OF POLYHYDROXY PHENOLS |
摘要 |
<p>Liquid epoxy resins are produced by contacting a dihydroxy phenol with an excess of epihalohydrin and an aqueous solution of an alkali metal hydroxide in a molar ratio of hydroxide to phenol not exceeding 2:1, recovering from the reaction products an epoxy resin having a content of hydrolyzable chlorine of from 1 to 6% by weight, contacting a solution of the resin in a hydrocarbon with an aqueous solution of an alkali metal hydroxide while maintaining an atomic ratio of alkali metal to hydrolyzable chlorine contained in the resin of from 1:1 to 1.17:1 and recovering from the reaction products a liquid epoxy resin having a content of hydrolyzable chlorine less than 0.02% by weight. These epoxy resins of high purity are particularly useful as varnishes or coatings.</p> |
申请公布号 |
CA1041107(A) |
申请公布日期 |
1978.10.24 |
申请号 |
CA19750227599 |
申请日期 |
1975.05.22 |
申请人 |
SOCIETA ITALIANA RESINE S.I.R. S.P.A. |
发明人 |
VARGIU, SILVIO;CRESPOLINI, GIANCARLO;GRAZZINI, GIULIO |
分类号 |
C07D301/28;C07D303/24;C08G59/00;C08G59/06;(IPC1-7):07D301/28 |
主分类号 |
C07D301/28 |
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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