Aqueous coating compositions exhibiting increased open time...

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 7/12 (2006.01) C08J 3/18 (2006.01) C09D 125/14 (2006.01) C09D 131/04 (2006.01) C09D 133/00 (2006.01)

Patent

CA 2717888

In addition to acting as effective plasticizers, dibenzoates of diethylene and dipropylene glycols in combination with at least one of the corresponding monoesters within a specified concentration range are unique in their ability to extend the open time exhibited by aqueous polymer compositions, and are thereby capable of replacing at least a portion of more volatile organic compounds (VOC.'s) such as diols, glycols and esters of mono-and dihydric alcohols and benzoates of monohydric alcohols that are typically used as coalescents for these polymer compositions.

L'invention concerne des compositions de revêtement aqueux dans lesquels en plus d'agir comme plastifiants efficaces, des dibenzoates de diéthylène et des dipropylèneglycols en combinaison avec au moins un des monoesters correspondants dans une plage de concentration spécifiée sont uniques dans leur capacité à étendre le temps d'ouverture présenté par des compositions polymériques aqueuses, et sont par conséquent capables de remplacer au moins une partie de composés organiques plus volatils (COV) tels que des diols, des glycols et des esters d'alcool monohydrique et dihydrique et des benzoates d'alcools monohydriques qui sont utilisés de manière typique comme coalescents pour ces compositions polymériques.

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