发明名称 |
PROCESS FOR PRODUCING MODIFIED PHENOLIC RESINS |
摘要 |
{PG,1 A drying oil such as isomerized linseed oil, dehydrated castor oil or the like oil which has an iodine value of more than 140 and a content of conjugated double bonds of less than 50% is reacted with isopropenylphenol and/or oligomers thereof in an amount, by weight, of 0.1{14 2 times as great as that of the drying oil in the presence of a small amount of an acid at a temperature of 65{14 150{20 {0 C. for 0.5{14 3 hours. By the reaction, isopropenylphenol and/or its oligomers are introduced to the drying oil while leaving the double bonds of the oil as they are without disappearance. The thus introduced oil is further reacted with a phenol or phenols under strongly acidic conditions to introduce the phenols thereto. The drying oil which has been introduced with the isopropenylphenol and/or its oligomers and also with the phenols is mixed with a phenol or phenols and then reacted with formaldehyde to give a modified phenolic resin. This phenolic resin is useful for making a phenolic laminate with improved flexibility, punching quality and water proof. |
申请公布号 |
DE2861314(D1) |
申请公布日期 |
1982.01.14 |
申请号 |
DE19782861314 |
申请日期 |
1978.08.03 |
申请人 |
MITSUI TOATSU CHEMICALS, INCORPORATED |
发明人 |
KATO, NOBUKATSU;TAKASE, TSUTOMU;MORIMOTO, YOSHIO;KATAOKA, TAKASHI;HATTORI, MINORU |
分类号 |
C08G8/24;C08G8/32;(IPC1-7):C08G8/32 |
主分类号 |
C08G8/24 |
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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