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A novel polyester-imide solventless impregnating resin, coded as PEI, has been fabricated using a propoxylated neopentyl glycol dimethyl acrylic ester as the reactive crosslinking monomer. It is shown that the PEI resin is nontoxic and has a volatile content of 0.8%, far lower than 24.6 and 7.5% of the traditional unsaturated polyester impregnating resins containing styrene and vinyl toluene as the...
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