Polyether phosphates

Details Polyether phosphates Polyether phosphates

C - Chemistry, Metallurgy

08

G

C08G 65/32 (2006.01) C08G 63/664 (2006.01) C08G 63/692 (2006.01) C08G 63/91 (2006.01) C08G 65/28 (2006.01) C08G 65/332 (2006.01) C08G 65/335 (2006.01) C09D 7/02 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2191469

A dispersant for aqueous mill-bases obtainable by reacting a polyethylene glycol with a molar excess of a hydroxycarboxylic acid containing from 4 to 17 carbon atoms or lactone thereof and/or with a C3-4-alkylene oxide to form a polymeric diol and phosphating the diol. The preferred hydroxycarboxylic acid or lactone is .epsilon.-caprolactone.

On obtient un agent de dispersion destiné à un milieu aqueux contenant des pigments broyés, en faisant réagir un polyéthylène-glycol avec un excédent molaire d'un acide hydroxycarboxylique comprenant de 4 à 17 atomes de carbone ou d'une lactone de celui-ci et/ou avec un oxyde d'alkylène C¿3-4?, afin de former un diol polymère, puis en phosphatant le diol. La lactone ou l'acide hydroxycarboxylique préféré est une .epsilon.-caprolactone

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