Hydrophobic lattices and coating compositions containing them

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 220/28 (2006.01) C09D 133/14 (2006.01)

Patent

CA 2455511

A coating composition containing an emulsion polymer prepared with up to about 20% by weight, based on total polymerizable monomers, of addition polymerizable esters of the glycidyl esters of tertiary acids having 9 or more carbon atoms, preferably up to 18 carbon atoms, and particularly having 9 to 11 carbon atoms has improved application properties and produces coatings with better appearance and less water sensitivity. The emulsion polymerization process of the invention produces less coagulum without having to increase the amount of surfactant.

L'invention concerne une composition de revêtement contenant un polymère en émulsion et jusqu'à environ 20 % en poids, sur la base de la totalité des monomères polymérisables, d'esters polymérisables d'addition des esters glycidyliques d'acides tertiaires comprenant au moins 9 atomes de carbone, de préférence jusqu'à 18 atomes de carbone, et plus particulièrement entre 9 et 11 atomes de carbone. Cette composition possède des propriétés d'application améliorées et permet d'obtenir des revêtements présentant un meilleur aspect et une sensibilité à l'eau réduite. Le procédé de polymérisation en émulsion de l'invention permet de réduire la production de coagulat sans qu'il soit nécessaire d'augmenter la quantité d'agent de surface.

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