Use of a betaine surfactant together with an anionic...

C - Chemistry – Metallurgy – 09 – K

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C09K 3/00 (2006.01) C10M 173/02 (2006.01) F15D 1/06 (2006.01) F17D 1/16 (2006.01)

Patent

CA 2213766

A combination of at least one betaine surfactant having a saturated or unsaturated alkyl or acyl group having 10-24 carbon atoms, preferably 14-24 carbon atoms, and an anionic surfactant having the general structure: R1-B where R1 is a hydrocarbon group with 10-24 carbon atoms and B is a group (a) or a group (b), in which M is hydrogen or a cationic, preferably monovalent group in a proportion between the betaine surfactant and the anionic surfactant of from 20:1 to 1:2, preferably from 10:1 to 1:1, reduces the flow resistance between a flowing water-based liquid system and a solid surface.

Combinaison d'au moins un tensioactif bétaïne possédant un groupe alkyle ou acyle saturé ou insaturé doté de 10 à 24 atomes de carbone, de préférence de 14 à 24 atomes de carbone, et d'un tensioactif anionique de formule générale R1-B dans laquelle R1 est un groupe hydrocarbure possédant 10 à 24 atomes de carbone et B est un groupe (a) ou un groupe (b), dans lesquels M est hydrogène ou un groupe cationique, de préférence monovalent, la proportion entre le tensioactif bétaïne et le tensioactif anionique étant de 20/1 à 1/2, de préférence de 10/1 à 1/1. Ladite combinaison réduit la résistance à l'écoulement entre un système liquide coulant à base d'eau et une surface solide.

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