Preparation of Telomer-type Surfactants from Vinylpyrrolidone and Methyl Acrylate and Their Application to Detergent Builders

Abstract

Radical telomerization was carried out using vinylpyrrolidon and methyl acrylate as monomers and 1-dodecanthiol. Benzene was used as the solvent and α, α'-azobisisobutyronitrile, as the initiator. The synthesized telomers (Ls-VPr-MA series) were treated with alkaline solvent to give various saponificated products. The cmc and chelating values of these telomers increased and lime soap dispersion power, orange OT solubilization and anti-redeposition ability decreased inversely with the degree of saponification. Surface tension and CaCO3 dispersion ability attained a maximum at 50 mol% saponification.The detergency of the detergent made from Ls-VPr-MA series telomers, builders and LAS or soap decreased as the degree of saponification increased. This tendency was particularly pronounced for the soap detergent system and polyester test fabric. In regard to the effects of the functional group of the telomers on detergency, the pyrrolidone and methoxycarbonyl group combination was considered far superior to individual carboxyl, carbamoyl, and pyrrolidone groups or their combination. The Ls-VPr-MA-Na telomers showed the strongest detergency effect at the degree of polimerization (DP) 10.Detergency of the soap containing Ls-VPr-MA telomers was superior to the commercial lime soap dispersion agent, and Ls-VPr-MA telomers was effective when present at 5, 10% in the detergent.