Dispersing agents, dispersions containing these agents and paints and inks made from the dispersions
AssigneeImperial Chemical Industries PLC
InventorArthur Topham
Life of this patent
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Abstract
Dispersing agents comprising a poly(lower alkylene)imine chain to which are attached at least two polyester chains by means of salt and/or amide links and the use of these agents in the preparation of dispersions of solids, particularly dyestuffs and pigments, in organic liquids.
Claims16
A dispersing agent comprising the reaction product of a poly(lower alkylene)imine with a polyester having a free carboxylic acid group, in which there are at least two polyester chains attached to each poly(lower alkylene)imine chain, the number average molecular weight of the polyester being in the range of 5600 to 560 and the molecular weight of the poly(lower alkylene)imine being such that it has a viscosity measured at 25.degree. C. as a 25% solution in water in the range of 9.3 to 2780 centipoises.
Dependencies are inferred from the claim text.