CPC C11D 3/33 (2013.01) [C11D 1/72 (2013.01); C11D 1/722 (2013.01); C11D 3/0026 (2013.01); C11D 3/044 (2013.01); C11D 3/08 (2013.01); C11D 3/10 (2013.01); C11D 3/3761 (2013.01); C11D 11/0029 (2013.01); C11D 17/0047 (2013.01); C11D 17/0056 (2013.01); C11D 17/0073 (2013.01); C11D 17/06 (2013.01)] | 14 Claims |
1. A solid, alkaline, non-staining detergent composition comprising:
from about 60 wt-% to about 70 wt-% of a sodium carbonate alkalinity source;
from 12 wt-% to about 15 wt-% (by actives) of an alkali metal silicate;
from 5 wt-% to about 10 wt-% (by actives) of an ethylenediaminetetraacetic acid (EDTA) or salts thereof,
from about 1 wt-% to about 10 wt-% (by actives) of a methylglycine-N,N-diacetic acid (MGDA) or salts thereof;
from 2.5 wt-% to about 5 wt-% (by actives) of at least one water conditioning polymer comprising polymaleic acid homopolymer, a polyacrylic acid homopolymer, or combinations thereof, and
from about 1 wt-% to about 5 wt-% of an alcohol alkoxylate nonionic surfactant defoaming agent;
wherein the weight ratio by actives of the ethylenediaminetetraacetic acid (EDTA) or salts thereof to methylglycine-N,N-diacetic acid (MGDA) or salts thereof is at least about 1:1;
wherein the composition is substantially free of nitrilotriacetic acid (NTA); and
wherein the solid composition provides no aluminum discoloration when diluted in a use solution to a concentration of at least about 1500 ppm.
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