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Improved latex composition employing specifically defined ethylene oxide-propylene oxide block copolymer surfactant and hydrophobic defoaming agent
Improved latex composition employing specifically defined ethylene oxide-propylene oxide block copolymer surfactant and hydrophobic defoaming agent
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机译:使用特定定义的环氧乙烷-环氧丙烷嵌段共聚物表面活性剂和疏水性消泡剂的改进的胶乳组合物
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摘要
An improved latex composition is provided that has been found to exhibit a superior ability to form a substantially uniform polymeric film when applied to a substrate. The composition is capable of being handled and applied to a substrate in the absence of excessive foaming. The aqueous composition includes as essential components specified concentrations of a specifically-defined normally liquid predominantly hydrophobic nonionic ethylene oxide/propylene oxide block copolymer surfactant, and a solely hydrophobic defoaming agent (e.g., a hydrocarbon-based mineral oil). It is possible for the composition to be applied even to a hydrophobic substrate (e.g., a polyester film substrate). Compositions of the present invention, following application to a substrate and the volatilization of the water component, form a substantially uniform polymeric film that can serve as a coating or adhesive.
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