Method for preparing latex by emulsion (co)polymerisation of...

C - Chemistry – Metallurgy – 08 – F

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C08F 2/22 (2006.01) C08L 9/04 (2006.01) C08L 9/08 (2006.01) G01N 21/65 (2006.01)

Patent

CA 2362971

The invention concerns a novel method for preparing latex by emulsion (co)polymerisation of ethylenically unsaturated monomers, wherein the direct inline monitoring is carried out by Raman spectroscopy. The invention also concerns latex compositions obtainable by the emulsion (co) polymerisation method whereof the direct inline monitoring is performed by Raman spectroscopy. The invention further concerns a device for implementing said method, said device comprising a reactor, at least an optical probe, a Raman spectrometer, optical fibres, a computer and a regulating automaton.

La présente invention a pour objet un nouveau procédé de préparation de latex par (co)polymérisation en émulsion de monomères éthyléniquement insaturés, dans lequel le suivi direct en ligne de la (co)polymérisation est effectué par spectroscopie Raman. Les compositions à base de latex susceptibles d'être obtenues par le procédé de (co)polymérisation en émulsion dont le suivi en ligne est réalisé par spectroscopie Raman constituent le deuxième objet de l'invention. Enfin, le troisième objet de l'invention concerne un dispositif pour la mise en oeuvre du procédé précité; ce dispositif comprenant un réacteur, au moins une sonde optique, un spectromètre Raman, des fibres optiques, un calculateur et un automate de régulation.

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