| abstract |
(57) [Summary] (Modified) [Object] To provide a polycarboxylate compound useful as a builder in a detergent composition and a method for producing the same. [Structure] Structural unit of formula (I): (In the formula, x is 0, 1 or 2; the R group is a hydrogen atom, a hydroxyl group, a carboxyl group, a C 1 -C 3 alkyl group, a C 1 -C 3 hydroxyalkyl group, or a C 1 -C 3 carboxyalkyl. Group, or a hydroxycarboxymethyl group, provided that at least one of R 4 , R 5 , R 6 and R 7 contains a —COOM group; M is a hydrogen atom or a solubilizing cation). One containing polymeric or non-polymeric polycarboxylate compound, said polycarboxylate compound containing a side chain of a dicarboxylic acid group joined to the main chain by an ester bond is effective for divalent and polyvalent metal ions. Suitable sequestrants are, for example, polyvinyl citrate and polyallyl citrate. |