Methods of removing stains and machine dishwashing methods

US8920576B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Pavel Gentschev · Bad Goisern, AT
• Maren Jekel · Mülheim an der Ruhr, DE
• Arnd Kessler · Monheim am Rhein, DE
• Ulrich Pegelow · Goldkronach, DE
• Christian Nitsch · Dressendorf, DE
• Johannes Zipfel · Amsterdam, NL

Key dates

• Filing date: Feb 21, 2013
• Grant date: Dec 30, 2014
• Expiry date: Feb 21, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D2111/44
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A machine dishwashing method comprises: dispensing two liquid cleansers or detergents A and B into the interior of a machine dishwasher during the cleaning dishwashing cycle, wherein the liquid detergent A has a pH at 20° C. of 6 to 9 and the liquid detergent B has a pH at 20° C. of 9 to 14 and is dispensed at cleaning cycle time t2; and wherein the liquid cleansers or detergents A and B comprise, respectively: A: 10% to 75% by weight of a detergent builder, 0.1% to 10% by weight of an enzyme, 24.9% to 89.9% by weight of a solvent; and B: 10% to 74.9% by weight of a detergent builder, 25% to 89.9% by weight of a solvent; and wherein neither liquid cleanser or detergent A nor liquid cleanser or detergent B individually comprises more than 2% by weight of a bleaching agent.