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Composite material having an expanded, cured epoxy resin layer, method of producing same and powder epoxy resin composition for forming such an expanded layer
Composite material having an expanded, cured epoxy resin layer, method of producing same and powder epoxy resin composition for forming such an expanded layer
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机译:具有膨胀的固化环氧树脂层的复合材料,其制造方法和用于形成这种膨胀层的粉末环氧树脂组合物
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摘要
A composite material having a substrate and an expanded, cured layer of an epoxy resin composition which is provided over a surface of the substrate and in which a major portion of the cells are present in a location adjacent to the interface between the substrate and the expanded layer and substantially no cells are present on the top surface portion of the expanded layer. The epoxy resin composition includes an acid anhydride curing agent and an alkali metal carbonate blowing agent. The composition is coated over the substrate and the coating is heated to sure and expand the composition while maintaining the top surface of the coating below the expansion temperature.
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