专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP0665249A1 Process for producing highly reactive modified phenolic resin 失效
标题翻译： Verfahren zur Herstellung von hochreaktiven modifizierten Phenolharzen。
公开(公告)号：EP0665249A1
公开(公告)日：1995-08-02
申请号：EP95101064.4
申请日：1995-01-26
申请人： KASHIMA OIL CO., LTD
发明人： Tsumura, Masahiro, c/o Kashima Oil Co.,Ltd. , Tashima, Masao, c/o Kashima Oil Co.,Ltd. , Miyasita, Hiromi, c/o Kashima Oil Co.,Ltd.
IPC分类号： C08G8/28 , C08L61/06 , C08L63/00 , H01B3/36
CPC分类号： H01B3/36 , C08G8/28 , C08G10/04 , C08G14/04 , C08L61/14 , C08L63/00 , C08L2666/22 , C08L61/04
摘要： A process for producing a highly reactive modified phenolic resin, comprising the steps of polycondensing a petroleum heavy oil or pitch, a formaldehyde polymer and a phenol in the presence of an acid catalyst to thereby prepare a modified phenolic resin; and reacting the resultant modified phenolic resin with a phenol in the presence of an acid catalyst but in the absence of a crosslinking agent such as a formaldehyde polymer to thereby lower the molecular weight of the modified phenolic resin. This highly reactive modified phenolic resin has a low number average molecular weight and a high phenol content, so that its resin melt viscosity is low and that it exhibits a markedly improved reactivity with an epoxy resin. Accordingly, the combination thereof with an epoxy resin provides a molding material suitable for producing a molding which is excellent in not only thermal resistance and moldability but also dimensional stability and other mechanical properties, especially a material for electrical or electronic part and a semiconductor sealer.
摘要翻译：一种生产高反应性改性酚醛树脂的方法，包括在酸催化剂存在下使石油重油或沥青，甲醛聚合物和苯酚缩聚的步骤，从而制备改性酚醛树脂; 在酸催化剂的存在下，使所得改性酚醛树脂与苯酚反应，但不存在交联剂如甲醛聚合物，从而降低改性酚醛树脂的分子量。该高反应性改性酚醛树脂具有低的数均分子量和高的苯酚含量，使得其树脂熔体粘度低，并且显示出与环氧树脂显着改善的反应性。因此，与环氧树脂的组合提供了适合于制造不仅具有优异的耐热性和成型性，而且尺寸稳定性和其它机械性能优异的成型体的成型材料，特别是电气或电子部件的材料以及半导体密封剂。

IPRDB

热门服务

关于我们

友情链接

联系方式