摘要 |
The invention concerns the use of modified polyaspartic acids as additives to washing agents and washing agents containing the modified polyaspartic acids in amounts of between 0.1 and 20 wt.%. The modified polyaspartic acids are obtained by the polycondensation of aspartic acid in the presence of: (a) 2.5 to 25 mol % amines with at least 6 carbon atoms; and (b) at least 2 wt.% phosphoric acid, phosphorous acid, hypophosphorous acid, polyphosphoric acids, phosphorus pentoxide, phosphonic acids or mixtures of said acids, in each case relative to the amount of aspartic acid used, at temperatures of at least 120 DEG C and subsequent hydrolysis with bases to give modified polyaspartic acids with a phosphorus content of between 0.5 and 10 wt.%.
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申请人 |
BASF AG, 67063 LUDWIGSHAFEN, DE |
发明人 |
BAUR, RICHARD, DR., 67112 MUTTERSTADT, DE;BERTLEFF, WERNER, DR., 68519 VIERNHEIM, DE;JAEGER, HANS-ULRICH, DR., 67434 NEUSTADT, DE;FUNHOFF, ANGELIKA, DR., 69198 SCHRIESHEIM, DE;KRONER, MATTHIAS, DR., 67304 EISENBERG, DE;SCHORNICK, GUNNAR, DR., 67271 NEULEININGEN, DE |