Patent ID: 6162777
Filing Date: 2000-12-19
Classification: C11D

Abstract:
An automatic dishwashing elliptically shaped tablet which comprises approximately by weight:(a) 20% to 40% of an alkali metal phosphate detergent builder salt;(b) 10% to 25% of a dialkali metal disilicate;(c) 10 to 40% of an alkali metal carbonate;(d) 0.1% to 5% of a low foaming nonionic surfactant;(e) 0.05% to 3% of a crosslinked polyacrylic acid wherein said crosslinked polyacrylic acid polymer has the structure of: ##STR2## wherein n is a number sufficient to provide a polymer with a molecular weight of about 400,000 to about 2,000,000 and X is an alkali metal or alkaline earth metal cation;(f) 0.05% to 2% of an alkali metal salt of a fatty acid;(g) 0 to 1.0% of a pigment or dye;(h) 10% to 25% of sodium sulfate; and(i) 1% to 30% of a paraffin wax coated chlorine bleach compound wherein the paraffin wax has a melting point of at least 135.degree. F. and said paraffin wax coated chlorine compound contains 60 wt % to 90 wt % of the chlorine bleach compound, 10 wt % to 40 wt % of the parraffin wax and 1 wt. % to 10 wt. % of a sodium aluminosilicate flow aid and said automatic dishwashing tablet is elliptically shaped.