Polyester dispersants
AssigneeThe Lubrizol Corporation
InventorsDean Thetford, Ian Donald Maxwell, Lindsay Anne Slater
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Abstract
A dispersant which comprises a polyamine (eg polyallylamine) or polyimine (eg 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 C1-8-alkylene group or lactone thereof such as ε-caprolactone and/or δ-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 (eg ricinoleic acid) or lactone thereof.
Claims19
A dispersant which comprises a polyamine or polyimine 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 C1-8-alkylene group or lactone thereof and at least one other type of polyester chain derivable from one or more hydroxy carboxylic acids wherein at least one of the hydroxy caboxylic acids contains a C8-30-alkylene or C8-30-alkenylene chain or lactone thereof, including salts of such dispersants.
Dependencies are inferred from the claim text.