Magnesium low base number sulphonates

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 303/32 (2006.01) C07C 309/31 (2006.01) C10M 135/10 (2006.01) C10M 159/24 (2006.01) C07C 309/04 (2006.01)

Patent

CA 2213548

Magnesium low base number (LBN) sulphonates derived from high molecular weight sulphonic acids have low viscosity and are chloride free. The magnesium low base number sulphonates are not skin sensitisers. In their preparation neutralisation of high molecular weight sulphonic acids or partially neutralised soaps of high molecular weight sulphonic acids is completed by the use of a high base number sulphonate in conjunction with a carboxylic acid. The process does not require the use of chloride containing promoters and produces low chloride products.

La présente invention concerne des sulfonates de magnésium à faible indice d'acidité, dérivés d'acides sulfoniques de poids moléculaire élevé, et qui ont une faible viscosité et sont exempts de chlorures. Ces sulfonates ne sont pas des sensibilisants cutanés. Pour leur préparation, on procède à la neutralisation d'acides sulfoniques de poids moléculaire élevé ou de savons partiellement neutralisés d'acides sulfoniques de poids moléculaire élevé en utilisant un sulfonate à indice d'acidité élevé, combiné à un acide carboxylique. Le procédé ne nécessite pas l'emploi de promoteurs contenant des chlorures, et permet de produire des produits à faible teneur en chlorures.

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