Process for producing contact lens cleaning tablets with a disinfecting action for one-step cleaning

US4767559A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Hans-Friedrich Kruse · Korschenbroich, DE
• Jochen Jacobs · Wuppertal, DE
• Klaus-Dieter Wisotzki · Erkrath, DE
• Jutta Thul · Hilden, DE

Key dates

• Filing date: Apr 8, 1987
• Grant date: Aug 30, 1988
• Expiry date: Apr 8, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D17/0073
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Methods for producing a contact lens one-step cleaning and disinfecting tablet designed to be dissolved in water comprising: PA0 (A) preparing a tablettable neutralizing core mixture consisting essentially of at least one biocompatible reducing agent, at least one biocompatible catalyst, and at least one first buffering agent; PA0 (B) forming a core tablet from the mixture of step (A); PA0 (C) preparing a jacket mixture consisting essentially of at least one biocompatible cleaning and disinfecting agent and a second buffering agent; and PA0 (D) enveloping the core tablet of step (B) with the jacket mixture of step (C) so that it is completely surrounded by a stable outer layer thereof, as well as tablets produced by such methods.