Method of manufacturing fluoropolymers

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 14/18 (2006.01) C08F 2/22 (2006.01) C08F 214/18 (2006.01) C08L 27/12 (2006.01) C09D 127/12 (2006.01)

Patent

CA 2236694

The present invention provides a novel, optionally surfactant-free process for controlling particle number, particle size, and/or particle size distribution. The method of the invention also significantly improves monomer to polymer conversion rates, as well as increases the level of polymer solids which can be emulsified/dispersed in water without polymer flocculation. Specifically, the improved process provides an aqueous dispersion of up to about 48 % polymer solids in water in the absence of surfactant. The resulting fluoropolymers dispersions may be used in resin and coating applications.

L'invention concerne un nouveau procédé, éventuellement sans tensioactif, pour réguler le nombre de particules, leur taille et/ou la répartition granulométrique. Le procédé de l'invention améliore également de manière significative les taux de conversion de monomères en polymères et augmente également le taux des matières solides de polymère qui peuvent être émulsionnées et/ou dispersées dans l'eau sans floculation. De manière spécifique, le procédé amélioré permet de réaliser une dispersion aqueuse contenant jusqu'à 48 % de matières solides dans l'eau, en absence de tensioactif. Les dispersions de polymères fluorés résultantes peuvent être utilisées pour réaliser des résines ou des revêtements.

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