Acrylic polymer latex dispersions as additives for...

C - Chemistry – Metallurgy – 08 – F

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C08F 20/18 (2006.01) B01F 17/00 (2006.01) C08F 2/24 (2006.01) C08F 220/18 (2006.01) C08K 5/01 (2006.01) C10L 1/10 (2006.01) C10M 145/14 (2006.01) C10L 1/12 (2006.01) C10L 1/16 (2006.01) C10L 1/18 (2006.01) C10L 1/22 (2006.01) C10L 1/24 (2006.01) C10L 1/26 (2006.01)

Patent

CA 2457768

The invention concerns latex dispersions based on (co)polymers of one or several n alkyl (meth)acrylate monomers, n ranging between 6 and 40, and optionally one or several hardly water-soluble of (meth)acrylic and/or vinyl type, optionally one or several polar monomers selected among (meth)acrylamides and their derivatives and optionally one or several monomers selected among ethylenically unsaturated monocarboxylic or dicarboxylic acids or anhydrides. Said dispersions are obtained by free radical emulsion polymerisation in the presence of water. They can be used as such for inhibiting paraffin deposits contained in unrefined petroleum or diluted in one or several solvents.

La présente invention concerne des dispersions de latex à base de (co)polymères d'un ou plusieurs monomères de (méth)acrylate de n-alkyle, avec n variant de 6 à 40, et éventuellement d'un ou plusieurs monomères peu solubles dans l'eau de type (méth)acryliques et/ou vinyliques, éventuellement d'un ou plusieurs monomères polaires choisis parmi les (méth)acrylamides et leurs dérivés et éventuellement d'un ou plusieurs monomères choisis parmi les acides ou anhydrides mono- et/ou dicarboxyliques éthyléniquement insaturés. Ces dispersions sont obtenues par polymérisation radicalaire en émulsion en présence d'eau. Elles peuvent être utilisées telles quelles pour l'inhibition du dépôt de paraffines contenues dans les huiles brutes de pétrole ou bien diluées dans un ou plusieurs solvants.

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