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    • 5. 发明授权
    • Process for making dicyclopentadiene polyetherester resins
    • 制备二环戊二烯聚醚酯树脂的方法
    • US5780558A
    • 1998-07-14
    • US937778
    • 1997-09-25
    • Jeffrey A. KlangLau S. Yang
    • Jeffrey A. KlangLau S. Yang
    • C08G63/553C08G63/676C08G63/78C08L67/06C08F20/00C08G63/42
    • C08G63/676C08G63/553C08L67/06
    • A low-cost way to modulate the reactivity and acid number of polyetherester thermoset resins is disclosed. "Beginning" and "end" methods for making dicyclopentadiene (DCPD)-modified polyetherester resins are described. The "beginning" method comprises first heating a polyether, DCPD, a diol, an insertion catalyst, and a carboxylic acid derivative to produce a mixture that contains the polyether and a DCPD-diol diester adduct. Increasing the temperature causes insertion of the DCPD-diol diester into the polyether to give a DCPD polyetherester resin. The "end" method reacts a polyetherester resin made by insertion with DCPD to give a DCPD polyetherester resin. Compared with DCPD polyester resins, those of the invention give more flexible thermosets. Compared with unmodified polyetherester resins, the DCPD polyetherester resins offer formulators more control over curing, which eliminates mold distortion and shrinking or cracking of thermoset parts. Thermosets from blends of the subject resins and DCPD polyester resins show synergistic property improvements compared with thermosets from either resin alone.
    • 公开了一种低成本调节聚醚酯热固性树脂的反应性和酸值的方法。 描述了制备二环戊二烯(DCPD)改性的聚醚酯树脂的“开始”和“结束”方法。 “起始”方法包括首先加热聚醚,DCPD,二醇,插入催化剂和羧酸衍生物,以产生含有聚醚和DCPD-二醇二酯加合物的混合物。 增加温度导致将DCPD-二醇二酯插入聚醚中,得到DCPD聚醚酯树脂。 “末端”方法使通过DCPD插入制备的聚醚酯树脂反应得到DCPD聚醚酯树脂。 与DCPD聚酯树脂相比,本发明的聚酯树脂具有更多的柔性热固性材料。 与未改性的聚醚酯树脂相比,DCPD聚醚酯树脂可使配方设计师更好地控制固化,从而消除热固性部件的模具变形和收缩或开裂。 与单独的树脂的热固性材料相比,主题树脂和DCPD聚酯树脂的共混物的热固性显示出协同的性能改进。