发明名称 |
Novolak type phenolic resins and methods of manufacturing thereof |
摘要 |
One of the objects of the present invention is to offer novolak type phenolic resins which use phenols and aldehydes as raw materials and give narrow molecular weight distributions. The novolak type phenolic resins of the present invention are those obtained by condensation reaction of phenols with aldehydes in the presence of an oxycarboxylic acid having carboxyl groups, -COOH, and alcoholic hydroxyl groups, -OH, in one molecule. Thus, obtained novolak type phenolic resins show narrow molecular weight distributions, lower viscosity in molten state and, as a consequence, uniformity in curing time.
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申请公布号 |
US5929191(A) |
申请公布日期 |
1999.07.27 |
申请号 |
US19970863583 |
申请日期 |
1997.05.27 |
申请人 |
GUN EI CHEMICAL INDUSTRY CO., LTD. |
发明人 |
KURIMOTO, YOSHIAKI;KOJIMA, AKIYUKI;ABE, YUKIO;FUKUDA, TSUYOSHI;HASEGAWA, KAORI |
分类号 |
C08G8/04;C08G8/08;C08G8/10;(IPC1-7):C08G8/04 |
主分类号 |
C08G8/04 |
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