Polyester dispersants

B - Operations – Transporting – 01 – F

Patent

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Details

B01F 17/00 (2006.01) C09D 7/12 (2006.01) C09D 11/02 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2381764

A dispersant which comprises a polyamine (e.g. polyallylamine) or polyimine (e.g. polyethyleneimine) backbone chain containing side chains of two or more different types of polyester chain wherein at least one type of polyester chain is derivable from one or more hydroxy carboxylic acids all of which contain a C1-6-alkylene group or lactone thereof such as .epsilon.- caprolactone and/or .delta.-valerolactone and at least one other type of polyester chain derivable from one or more hydroxy carboxylic acids wherein at least one of the hydroxy carboxylic acids contains a C8-30-alkylene chain (e.g. 12-hydroxystearic acid) or a C8-30-alkenylene chain (e.g. ricinoleic acid) or lactone thereof.

La présente invention concerne un dispersant qui comprend une chaîne de squelette de polyamines (par exemple des polyallylamines) ou de polyimines (par exemple des polyéthylèneimines) contenant des chaînes latérales d'au moins deux différents types de chaînes polyester, dont au moins une chaîne polyester est dérivable d'un ou de plusieurs acides hydroxy carboxyliques, chacun d'eux contenant un groupe alkylène en C¿1-6? ou une lactone de ceux-ci telle que .epsilon.-caprolactone et/ou .delta.-valérolactone et au moins un autre type de chaîne polyester dérivable d'un ou de plusieurs acides hydroxy carboxyliques dont au moins un de ces acides contient une chaîne alkylène en C¿8-30? (par exemple un acide 12-hydroxystéarique) ou une chaîne alkénylène en C¿8-30? (par exemple un acide ricinoléique) ou une lactone de ceux-ci.

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