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    • 93. 发明授权
    • Epoxide materials
    • 环氧材料
    • US4107142A
    • 1978-08-15
    • US685674
    • 1976-05-12
    • Anthony Vernon CunliffePeter John PearceDavid Hugh Richards
    • Anthony Vernon CunliffePeter John PearceDavid Hugh Richards
    • C08F283/10C09J163/00C08G67/00C08K5/15C08F24/00
    • C09J163/00C08F283/10
    • Epoxide materials suitable for use in flexible adhesives are prepared by reacting a diene, such as butadiene or isoprene, with an electron donor, typically an alkali metal, in the presence of a polyepoxide normally in a molar ratio diene:polyepoxide of less than 3:1. The polyepoxide is typically a conventional epoxy resin such as DGBA. The product normally separates into two phases, the upper of which comprises epoxy-terminated diene oligomers with degrees of polymerization of about 6 to 14. This separation may be avoided by incorporating a minor proportion of acrylonitrile into the product by addition to either the original diene or the anionic living polymer immediately before hydrolysis. The products may be cured with conventional epoxide curing agents to give an internally flexibilized adhesive having useful combinations of tensile and shear strengths.
    • 适用于柔性粘合剂的环氧化物材料是通过二烯(如丁二烯或异戊二烯)与电子给体(通常为碱金属)在通常摩尔比为二烯:聚环氧化物的聚环氧化物的存在下反应制备的, 1。 聚环氧化物通常是常规的环氧树脂,例如DGBA。 产物通常分成两个相,其上部包括聚合度为约6至14的环氧基封端的二烯低聚物。通过加入原始二烯中将少量丙烯腈加入到产物中可以避免这种分离 或立即在水解之前的阴离子活性聚合物。 产物可以用常规的环氧化物固化剂固化,得到具有拉伸和剪切强度的有用组合的内部柔性粘合剂。