发明名称 |
Method of preparing naphthol-modified phenolic resin |
摘要 |
A naphthol-modified phenolic resin having low softening point and good flowability is obtained by allowing a naphthol and a phenol to react with an aldehyde in the presence of an acid catalyst at 60 DEG to 110 DEG C. to obtain a primary reaction mixture, heating the primary reaction mixture in the presence of a strong acid, a super acid or a mixture thereof under ambient pressure at 120 DEG to 180 DEG C. for 1 to 12 hours to obtain a secondary reaction mixture, and subjecting the secondary reaction mixture to vacuum concentration or steam distillation, and the naphthol-modified phenolic resin is suited to use as a curing agent in epoxy resin molding materials for sealing electronic parts.
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申请公布号 |
US5459223(A) |
申请公布日期 |
1995.10.17 |
申请号 |
US19940193468 |
申请日期 |
1994.02.08 |
申请人 |
HITACHI CHEMICAL COMPANY |
发明人 |
SUE, HARUAKI;HAGIWARA, SHINSUKE;SAITOH, HIROYUKI |
分类号 |
C08G8/04;C08G8/28;C08L61/06;C08L63/00;H01B3/36;H01B3/40;H01L23/29;(IPC1-7):C08G8/04;C08G14/04 |
主分类号 |
C08G8/04 |
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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