Polyacrylamide polymerisation

Details Polyacrylamide polymerisation Polyacrylamide polymerisation

C - Chemistry, Metallurgy

08

F

C08F 20/56 (2006.01) C02F 1/56 (2006.01) C08F 2/32 (2006.01)

Patent

CA 2263463

Polyacrylamide is made by inverse emulsion polymerisation using an oil phase including at least one ester based oil, particularly a vegetable oil, using a primary emulsification system including a polymeric carboxylic surfactant; a low HLB emulsifier; and an oil phase structurant, particularly an ester wax such as beeswax. The use of the combination emulsifier enables the use of vegetable oils especially rape seed (including canola) oil as the continuous in the polymerisation step.

On fabrique un polyacrylamide par polymérisation en émulsion inverse en utilisant une phase huileuse comprenant au moins une huile à base d'ester, en particulier une huile végétale, en utilisant un système d'émulsification primaire comprenant un surfactif carboxylique de polymère, un émulsifiant de faible rapport hydrophilelipophile, et un agent de structuration de phase huileuse, en particulier une cire d'ester telle que la cire d'abeille. L'utilisation de l'émulsifiant combiné permet l'utilisation d'huiles végétales, spécialement de l'huile de graine de colza (y compris le colza canola), comme éléement continu de l'étape de polymérisation.

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