Ether/ester dispersants
AssigneeAvecia Limited
InventorDean Thetford
Life of this patent
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Abstract
A dispersant which is a phosphate ester of a polymer which contains at least one ether group and a poly(oxyalkylenecarbonyl) chain (POAC chain) derivable from two or more different hydroxycarboxyl acids or lactones thereof. Also disclosed is the use of the dispersants in paints and printing inks including millbases. The preferred dispersants are phosphate esters of an alkyl end-capped poly(oxyalkylenecarbonyl) chain alcohol where the POAC chain is derived from ε-caprolactone and δ-valerolactone and the alkyl group is derived from a monohydroxypolyalkyleneglycol.
Claims12
A TPOAC mono-functional alcohol which is a polymer containing at least one ether group and a poly(oxyalkylenecarbonyl) chain derived from two or more different hydroxycarboxylic acids or lactones thereof.
A TPOAC mono-functional alcohol which is a copolymer of formula
- RO[Brketopenst](CO—A—O)n(CO—B—O)m]H (1)
- wherein
- R is a polymerisation terminating group containing at least one ether link;
- A and B are each, independently, different alkenylene groups or C1-17-alkylene groups optionally substituted by alkyl;
- n and m are each positive integers;
- and
- n+m is from 2 to 200.
Dependencies are inferred from the claim text.