Dishwashing compositions with an anti-filming polymer
AssigneeLever Brothers Company
InventorsJohannes J. M. de Ridder, Michael W. Hollingsworth, Ian D. Robb
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Abstract
The present invention pertains to a machine dishwashing or rinsing composition being substantially free from anionic synthetic detergents or fatty acid soaps, and having a very low or zero phosphate content, which comprises a nonionic detergent surfactant, a water-soluble calcium sequestering agent, a specific polymeric material and an alkaline detergent material, said composition having improved non-filming, non-spotting or non-streaking properties.
Claims4
A machine dishwashing or rinsing composition being substantially free from anionic detergents and having a very low or zero phosphate content, which comprises:
- (a) from 5.50% by weight of a calcium sequestering agent selected from the group consisting of water-soluble citrate salts, water nitrilotriacetic acid salts, water-soluble carboxymethyloxy succinic acids salt, zeolites, ethane-1,1-dihydroxyphosphonic acid salts, ethylenediamine tetraphosphonic acid salts and ethylenediamine tetraacetic acid salts;
- (b) from 0.05-5% by weight of hydrolyzed polymaleic anhydride having an average molecular weight of about 2,500;
- (c) up to 5% by weight of a nonionic detergent surfactant;
- and p1 (d) an alkaline detergent material selected from the group consisting of alkali metal hydroxides, alkali metal borates, alkali metal disilicates, alkali metal silicates having an alkali metal:
- SiO.sub.2 ratio of 1:3.4, and alkali metal carbonates;
- the weight ratio between said sequestering agent and said hydrolyzed polymaleic anhydride being between 1:1 and 100:1.
Dependencies are inferred from the claim text.