发明授权
- 专利标题： Novolak type phenolic resins and methods of manufacturing thereof
- 专利标题（中）： 酚醛清漆型酚醛树脂及其制造方法
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申请号： US863583申请日： 1997-05-27
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公开(公告)号： US5929191A公开(公告)日： 1999-07-27
- 发明人: Yoshiaki Kurimoto , Akiyuki Kojima , Yukio Abe , Tsuyoshi Fukuda , Kaori Hasegawa
- 申请人： Yoshiaki Kurimoto , Akiyuki Kojima , Yukio Abe , Tsuyoshi Fukuda , Kaori Hasegawa
- 申请人地址： JPX Gunma-ken
- 专利权人： Gun Ei Chemical Industry Co., Ltd.
- 当前专利权人： Gun Ei Chemical Industry Co., Ltd.
- 当前专利权人地址： JPX Gunma-ken
- 主分类号： C08G8/04
- IPC分类号： C08G8/04 ; C08G8/08 ; C08G8/10
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.