Polycarboxlate Polymers as Environment-Protecting Detergent Builder

Research Project

Project/Area Number	06680054
Research Category	Grant-in-Aid for General Scientific Research (C)
Allocation Type	Single-year Grants
Research Field	家政学
Research Institution	Kyoritsu Women's University
Principal Investigator	NAGAYAMA Masuzo Professor, The Institute of Human and Cultural Reseach, Kyoritsu Women's University, 総合文化研究所, 教授 (50228061)
Co-Investigator(Kenkyū-buntansha)	YAMAGUCHI Yoko Instructor, The Department of HOme Economics Kyoritsu Women's Jounir College, 生活科学科, 専任講師 (20201832)
Project Period (FY)	1994 – 1995
Project Status	Completed (Fiscal Year 1995)
Budget Amount *help	¥1,300,000 (Direct Cost: ¥1,300,000) Fiscal Year 1995: ¥700,000 (Direct Cost: ¥700,000) Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Keywords	Environment / Biodegradation / Polycarboxlate / Detergent Builder / Inductively Coupld Plasma / Electron Spectroscopy for Chemical Analysis / Calcium ion Sequestering / Detergency / 高分子カルボン酸塩 / 高周波発光分析(ICP) / X線光電子分光分析(ESCA) / 人工汚染布
Research Abstract	This study was preformed to develop environmental consious household detergents. In tis purpos, biodegradable polymentacrylate complymerized with vinylpyrrolidon was studied as a detergent builder instead of sodium tripolyphosphate (STP). The characteristics of the copolymer as a detergent builder were measured by detergency, calcium-exchanging rate, and bunding capacity of calcium ions. Also, we measured remaind calcium in washed cloths, by Inductively coupled Plasma (ICP), and Electron spectroscopy for chemical analysis (ESCA). Results : 1) Optimum washing ability was obtaind, when the content in detergent was from nearly 40% up of the polymer. The polymer had match better builder effect than Zeolite in detergent formulations, becouse it had suitable calcium-exchenging rate and binding capacity of calcium ions. The polymer with number average molecular weight of 8,000 to 18,000, was indicated to have good detergent builder effects. 2) We confirmed that removing ability of calcium was six times better, with the polymer to without the polymer, in based alkylbenzene sulfonate as detergent formulations. The capacity of sequestering and complex-building for metal ions, was indicated the polymer nearly equal to that of as STP,and better than thet of Zeolite. 3) Chemical structure of residual calcium atoms, which were adsorped on washed cloth, was analyzed by ESCA-method. The result was shown thet calcium atoms were bonded to sulfate radicals. 4) A detergent which was conteing the polymer, had good detergency in Japanese and Europian usage. Especially, it had good practical perfomance, by useing of front-loding household washer.