Organic Builders. XII.

Abstract

Poly (sodium acrylate) s with molecular weight 56041100 and poly (sodium 2-hydroxyacrylate) s with molecular weight 11007800 were prepared, and their building performances, Ca2+ sequestering capacity, surface tension, emulsifying power, cmc, buffering capacity, dispersing power for carbon black and MnO2, and the detergency on soiled cotton fabrics were also determined for the builders (with/without sodium dodecylbenzenesulf ovate) and compared with the corresponding properties for sodium tripolyphosphate (STPP) and disodium 3-oxapentanedioate (ODA).It was evident that the washing efficiencies of detergents containing each of the builders correlated with Ca2+ sequestering capacities and dispersing power for MnO2. Other physicochemical properties of the builders correlated poorly with their washing efficiencies. The most effective molecular weight for these poly electrolytes were about 8000. Poly (sodium acrylate) s with molecular weight 300010000 had better building performances than STPP. And also the polyacrylates had better building performances than the poly (2-hydroxyacrylate) s.