Enzyme-containing automatic dishwashing composition

Compositions – Fluent dielectric – N-containing

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252 89R, 252321, 252358, 252529, 252DIG1, 252DIG12, 252DIG15, C11D 112

Patent

active

041014570

ABSTRACT:
Bleach-free, brightener-free automatic dishwashing compositions comprising a binary active system and an enzyme having an isoelectric point greater than about 8.5. The binary active system comprises a nonionic surfactant, preferably an ethoxylated nonionic, and a sulfonated aromatic compatibilizing agent. Preferred enzymes have an iso-electric point in the range from about 9.5 to about 12.0. Especially preferred enzymes are those exhibiting a proteolytic activity of 80 to 100% of maximum activity when measured at pH 12 by the Anson hemoglobin method carried out in the presence of urea. The inclusion of these particularly preferred enzymes permits the formulation of the detergent composition without the sulfonated aromatic compatibilizing agent. The instant compositions exhibit enhanced anti-redeposition properties for soils composed of grease and grease-protein complexes thereby insuring the virtual elimination of streaks and spots on the hard surfaces being cleaned. A process for cleaning dishes utilizing the compositions of the present invention is also disclosed.

REFERENCES:
patent: 2340035 (1944-01-01), Zimmer et al.
patent: 3250727 (1966-05-01), Woll et al.
patent: 3314891 (1967-04-01), Schmolka et al.
patent: 3858854 (1975-01-01), Win et al.
patent: 4001132 (1977-01-01), Maguire, Jr.

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