| 摘要 |
PURPOSE: Provided are a new class of dispersants, to dispersions containing such dispersants together with a particulate solid and an organic medium, to millbases and the use of such dispersions and millbases in paints and printing inks. CONSTITUTION: A dispersant of general Formula (1) is, wherein T is hydrogen or a polymerisation terminating group; Z is an acidic or basic group or a moiety containing either an acidic or basic group; A and B are each, independently, oxyalkylene carbonyl groups derivable from.delta.-valerolactone, ε-caprolactone or alkyl substituted ε -caprolactone provided that both are not ε-caprolactone or.delta.-valerolactone; n and p are integers; and n + p is from 2 to 100; including salts thereof. Specific examples of dispersants are the reaction product of lauric acid, ε-caprolactone, 7-methyl-ε -caprolactone with PEI, the reaction product of lauric acid, ε-caprolactone,.delta. -valerolactone with PEI and the phosphate of the reaction product of dodecanol, ε -caprolactone and.delta.-valerolactone.
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