发明名称 |
Process for preparing relatively high molecular weight epoxy resins |
摘要 |
Epoxy resins low in aliphatic halogen are prepared by reacting a polyhydric phenol with an excess of an epihalohydrin in the presence of a secondary alcohol and an aqueous solution of an alkali metal hydroxide until from 45 to <70 percent of the phenolic hydroxyl groups have reacted; removing unreacted polyhydric phenol therefrom until less than 4% total phenolic hydroxyl remains in the reaction product; dehydrohalogenating the resultant intermediate product and recovering the epoxy resin therefrom.
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申请公布号 |
US4558116(A) |
申请公布日期 |
1985.12.10 |
申请号 |
US19850707976 |
申请日期 |
1985.03.04 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
WERNLI, WALTER L.;SHIRTUM, ROBERT P. |
分类号 |
C07D303/24;C08G59/06;(IPC1-7):C08G59/06 |
主分类号 |
C07D303/24 |
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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