High solids content, low-viscosity emulsion polymers

Details High solids content, low-viscosity emulsion polymers High solids content, low-viscosity emulsion polymers

C - Chemistry, Metallurgy

08

L

C08L 33/08 (2006.01) C08F 2/24 (2006.01) C08F 220/18 (2006.01) C08K 5/103 (2006.01) C08K 5/11 (2006.01) C08K 5/42 (2006.01) C09D 133/08 (2006.01)

Patent

CA 2460691

Emulsion polymers useful in the preparation of coatings and adhesives, including PSA tapes, labels, and other constructions, are provided. The polymers are characterized by high solids content and low viscosity. A method of making the polymers is also provided. A plurality of acrylic monomers are copolymerized in the presence of a plurality of surfactants, using a split feed, and the resulting emulsion polymers have a bimodal or higher particle- size distribution.

L'invention concerne des polymères en émulsion utiles dans la préparation de revêtements et d'adhésifs, y compris de bandes PSA, d'étiquettes et d'autres constructions. Les émulsions de polymères sont caractérisées par une teneur élevée en solides et une faible viscosité. L'invention concerne aussi un procédé de préparation des polymères. Plusieurs monomères acryliques sont copolymérisés en présence de plusieurs tensioactifs, au moyen d'une alimentation dédoublée, et les polymères qui en résultent possèdent une distribution de tailles de particules bimodale ou d'ordre plus élevé.

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