Liquid enzyme preparation and the use thereof

US6191092A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Siegfried Bragulla · Monheim, DE
• Andreas Potthoff · Goldkronach, DE
• Wilfried Serve · Leverkusen, DE

Key dates

• Filing date: Oct 22, 1999
• Grant date: Feb 20, 2001
• Expiry date: Oct 22, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D2111/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A stabilized liquid enzyme preparation containing a cleaning-active enzyme, a solvent selected from the group consisting of ethylene glycol, propylene glycol, glycerol, and mixtures thereof, and a stabilizer comprising a basic nitrogen compound selected from the group consisting of N,N-bis-(3-aminopropyl)-dodecyl amine, a salt of N,N-bis-(3-aminopropyl)-dodecyl amine, and mixtures thereof. Also, a method of cleaning an article by diluting the stabilized liquid enzyme preparation with water in a weight ratio of enzyme preparation to water of 1:500 to 1:5000 to form a cleaning solution, adding to the cleaning solution 0.01% to 0.2% by weight, based on the weight of cleaning solution, of a buffer concentrate to adjust the pH of the cleaning solution to 7 to 10; and contacting the article with a portion of the cleaning solution to effect cleaning thereof.