Waschmittel

摘要

Laundry detergent powder compsns. contain: (a) 0.5-60 wt.% of a builder comprising a layered silicate of formula NaMSixO2x+1.zH2O (where M=Na or H, x=1.9-4 and z=0-20), opt. together with zeolite A; (b) 5-50 wt.% surfactant(s); and (c) 0.5-10 wt.% of an epoxysuccinic acid polymer of formula (I). In (I) R1 and R2 = H or opt. substd. 1-4C alkyl; M = H, Na, K, NH4 or substd. ammonium; Y = OH, OR', NHR', N(R')2, SR', SO3M' or P(R')2; M' = H, Na or K; R' = opt. substd. alkyl or aryl; and n = 2-15. Pref. the compsns. contain 5-60 wt.% (a), 10-30 wt.% (b) and 0.5-5 wt.% (c). The (a):(c) wt. ratio is 5-100:1. (I) has n=2-10, esp. 2-4. The silicate is delta-Na2Si2O5 (II).