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US5166184A Epoxy resin, process for the preparation thereof and process for the production of epoxy foam 失效
环氧树脂,其制备方法和环氧树脂泡沫的生产方法

Epoxy resin, process for the preparation thereof and process for the
production of epoxy foam
摘要:
A normally liquid epoxy resin obtainable by reaction of a bisphenol based oligocarbonate having terminal phenolic hydroxyl groups with an epihalohydrin, followed by dehydrohalogenation. The epoxy resin is capable of forming a tough cured product having improved flexural strength and flexural modulus. A process for the production of an epoxy resin foam in which a polyepoxy compound is crosslinked and simultaneously foamed by the aid of carbonate oligomers having terminal phenolic hydroxyl groups. The product is highly flexible against compression, bending and warp.
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