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    • 1. 发明授权
    • Modified phenolic resin toughened by poly (alkylene oxide) and
preparation thereof
    • 通过聚(环氧烷)增韧的改性酚醛树脂及其制备
    • US5965671A
    • 1999-10-12
    • US35486
    • 1998-03-05
    • Chen-Chi Martin MaHew-Der WuChih-Tsung Lee
    • Chen-Chi Martin MaHew-Der WuChih-Tsung Lee
    • C08G65/331C08L71/02G08G65/32
    • C08G65/3317C08L71/02
    • Modified resole and novolac type phenolic resins which are toughened by poly(alkylene oxide) are disclosed. The modified resole type phenolic resin is prepared by the following steps: mixing a poly(alkylene oxide) having a weight average molecular weight of 100,000.about.8,000,000 and phenol in a weight ratio of poly(alkylene oxide): phenol=1.5:1.about.1:1 at an elevated temperature to form a glutinous mixture; mixing the glutinous mixture with an acid catalyst to obtain a viscous mixture having a relatively low viscosity compared to the glutinous mixture; and mixing the viscose mixture with a resole type phenolic resin. The modified novolac type phenolic resin is prepared by directly mixing the glutinous mixture with a liquid novolac type phenolic resin. The amount of the poly(alkylene oxide) mixed is 2.about.10 wt % based on the phenolic resin.
    • 公开了通过聚(环氧烷)增韧的改性甲阶酚醛树脂和酚醛清漆型酚醛树脂。 通过以下步骤制备改性甲阶酚醛树脂:将聚(环氧烷):苯酚= 1.5:1的重量比混合重均分子量为100,000,000,000,000,000,000的聚(环氧烷烃) :1在升高的温度下形成糯混合物; 将糯混合物与酸催化剂混合以获得与糯混合物相比具有相对低粘度的粘性混合物; 并将粘胶混合物与酚醛树脂酚醛树脂混合。 通过将糯混合物与液体酚醛清漆型酚醛树脂直接混合来制备改性酚醛清漆型酚醛树脂。 混合的聚(环氧烷)的量相对于酚醛树脂为2%(重量)。