Patent ID: 7078370

Claim:
A biodegradable additive composition comprising: a) water; b) at least two of the chelants selected from the group consisting of: sodium polyaspartate; sodium iminodisuccinate; disodium hydroxyethyleneiminodiacetate (Na 2 HEIDA); sodium gluconate; sodium glucoheptonate; sugar alcohols; monosaccharides; and disaccharides, where at least one of the two chelants is selected from the group consisting of sodium polyaspartate, sodium iminodisuccinate, Na 2 HEIDA, and mixtures thereof: and c) a solvent or surfactant selected from the group consisting of polyvinylpyrrolidone (PVP), alkyl pyrrolidones, alkyl succinates, alkyl glutamates, alkyl carbonates, monoethanol amide, and alkyl glucosides.