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Toughening of cured vinyl ester resins by inclusion in the uncured resins of oligomeric vinyl-reactive urethanes which phase out upon curing
Toughening of cured vinyl ester resins by inclusion in the uncured resins of oligomeric vinyl-reactive urethanes which phase out upon curing
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机译:通过在未固化的树脂中包含低聚的乙烯基反应性聚氨酯来增韧固化的乙烯基酯树脂
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摘要
Vinyl ester/styrene mixtures are flexibilized by addition thereto of minor amounts of urethanes which (1) comprise at least one polyglycol moiety and two urethane groups and are terminated by vinyl- reactive end groups, and (2) form a dispersed second phase in the cured mixture. The flexibilized compositions otherwise largely retain the characteristic properties of the unflexibilized mixtures.
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