Stable low foam waterborne polymer compositions containing...

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 5/02 (2006.01) C08L 101/02 (2006.01) C09D 201/00 (2006.01)

Patent

CA 2303334

This invention provides low foam waterborne polymer compositions stabilized against gelling due to the addition of a poly(alkyleneimine) by addition of surfactants. Preferably, the surfactants are nonionic surfactants having a hydrophilic-lipophilic balance (HLB) of at least about 17.5. Polymerization in the presence of phosphate surfactants has been found to yield low foam polymers. These stable low foam polymer compositions are useful in a variety of coating formulations such as, for example, paints, inks, sealants, textile backcoatings, adhesives and the like. Methods of making stable low foam polymer are also disclosed.

Cette invention se rapporte à des compositions polymères aqueuses, à faible pouvoir moussant, stabilisées par l'addition de tensioactifs vis à vis de la gélification pouvant résulter de l'addition d'une poly(alkylèneimine). De préférence, les tensioactifs utilisés sont non ioniques et possèdent un rapport hydrophile-lipophile (HLB) supérieur ou égal à 17,5 environ. Il s'est avéré que la polymérisation en présence de tensioactifs à base de phosphates permet de produire des polymères à faible pouvoir moussant. Ces compositions polymères, stables, à faible pouvoir moussant sont utilisées dans de nombreuses formulations de revêtement telles que, par exemple, les peintures, les encres, les matériaux d'étanchéité, les enductions d'envers d'articles textiles, les adhésifs et analogues. L'invention se rapporte également à des procédés de fabrication de tels polymères stables, à faible pouvoir moussant.

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