IMPROVED LATEX COMPOSITION EMPLOYING SPECIFICALLY DEFINED ALCOHOL ETHOXYLATE SURFACTANT AND HYDROPHOBIC DEFOAMING AGENT

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...

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Bibliographische Detailangaben
Hauptverfasser: GREGORY W. DREWNO, REBECCA P. HOLLIS, MICHAEL J. ANCHOR
Format: Patent
Sprache:eng ; spa
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Beschreibung
Zusammenfassung: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 alcohol ethoxylate surfactant, and a solely hydrophobic defoaming agent (e.g., hydrocarbon-based mineral oil). It is possible for the composition to be applied even to a hydrophobic substrate (e.g., a polyester film substrate). The 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. Se proporciona una composicion de látex mejorada que se ha encontrado que exhibe capacidad superior para formar una película polimérica substancialmente uniforme cuando se aplica a un substrato. La composicion es capaz de manejarse y aplicarse a un substrato en ausencia de espumacion excesiva. La composicion acuosa incluye como componentes esenciales, concentraciones específicas de un agente tensioactivo de copolímero de bloque de oxido de etileno/oxido de propileno no ionico, predominantemente hidrofobico, normalmente líquido y, un agente despumadorunicamente hidrofobico (v.g.r., un aceite mineral a base de hidrocarburo). Es posible para la composicion aplicarse a un substrato hidrofobico (v.g.r., un substrato de película de poliéster). Las composiciones de la presente invencion, después de la aplicacion a un substrato y la volatilizacion del componente de agua, forma una película polimérica substancialmente uniforme que puede servir como un revestimiento o adhesivo.