Coated sodium percarbonate particles

Details Coated sodium percarbonate particles Coated sodium percarbonate particles

C - Chemistry, Metallurgy

11

D

C11D 3/39 (2006.01) C01B 15/10 (2006.01) C11D 3/02 (2006.01) C11D 17/00 (2006.01)

Patent

CA 2657197

Sodium percarbonate particles with a coating layer which contains sodium sulphate in the form of a high-temperature phase of sodium sulphate and/or a high-temperature phase of a double salt having the composition Na4(SO4)1+n(CO3)1-n, in which n equals 0 to 0.5, exhibit improved storage stability in detergent and cleaning agent preparations, in comparison with sodium percarbonate particles with a coating layer which contains sodium sulphate only in the form of sodium sulphate (V) or burkeite.

L'invention concerne des particules de percarbonate de sodium comportant une couche de pelliculage contenant du sulfate de sodium sous forme d'une phase haute température de sulfate de sodium et/ou d'une phase haute température d'un sel double de la composition Na4(SO4)1+n(CO3)1-n (n valant de 0 à 0,5). Par rapport à des particules de percarbonate de sodium contenant du sulfate de sodium dans la couche de pelliculage, uniquement sous forme de sulfate de sodium (V) ou de burkéite, les particules de percarbonate de sodium selon l'invention présentent une meilleure stabilité au stockage dans des préparations de lessive ou de détergent.

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