Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Enzyme component of specific activity or source
Patent
1995-04-20
1998-01-06
Lieberman, Paul
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Enzyme component of specific activity or source
510530, 510494, C11D 302, C11D 3386
Patent
active
057054690
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to the manufacture of liquid detergent compositions which comprise a sulphiting agent and an enzyme system.
BACKGROUND
Liquid detergents have been described extensively in the art. In applicants' co-pending European patent application 91870175.6 liquid laundry detergents are described which comprise a sulphiting agent that stabilizes the color characteristics of said compositions.
A new technical problem has occurred upon using sulphiting agents in liquid detergents in that important odors are generated as the sulphiting agent is incorporated in said detergents, so that said detergent's odor significantly deviates from its defined standard. The problem the present invention seeks to solve is to avoid odor deviations in liquid laundry detergents which comprise sulphiting agents.
In response to this technical problem, applicants have found that said odor deviation is generated by an interaction between the sulphiting agent and the enzyme which is also present in said detergent. Without wanting to be bound by theory, it is believed that the sulphiting agent reacts with impurities which are typically present in commercially available enzyme preparations.
Thus to avoid odor deviations in a liquid detergent comprising an enzyme system and a sulphiting agent, the present invention proposes to intimately mix said enzyme system and said sulphiting agent apart from the remainder of said detergent composition.
Liquid detergent compositions comprising sulphiting agents have been described in DE 3729474, EP 80 748, EP 80 223, EP 79641, BE 796 115 and U.S. Pat. No. 3,741,901. None of these documents suggest that enzymes and sulphiting agents may generate odor if they are mixed together. Furthermore, J01256596 (abstract) addresses the control of enzyme-originating odors. In the context of this document, sulphites are used to diminish the odor of enzymes.
SUMMARY OF THE INVENTION
The present invention includes a process for the manufacture of a liquid detergent composition comprising a sulphiting agent and an enzyme system, whereby said enzyme system and said sulphiting agent interact together so as to generate odors, characterized in that said process includes the steps of: sulphiting agent separately from the remainder of said detergent composition so as to generate said odor outside the remainder of said detergent composition, and conditions and until said odor has disappeared or is substantially reduced, and enzyme system to the remainder of said detergent composition.
The present invention further includes an enzyme premix obtainable in the course of the process according to the present invention, said enzyme premix consisting essentially of said enzyme system and said sulphiting agent.
DETAILED DESCRIPTION OF THE INVENTION
The present invention concerns the manufacture of liquid detergent composition. Liquid detergent compositions manufactured according to the present invention comprise conventional detergency ingredients, an enzyme system and a sulphiting agent.
As used herein, conventional detergency ingredients include such ingredients as surfactants, builders, bleaches, solvents, soil release agents, color care ingredients, chelants, dyes, perfumes and the like. The detergent compositions herein may be aqueous or anhydrous, and can further be formulated as so-called concentrated liquid detergent compositions. The detergent compositions according to the present invention can be formulated in a variety of different embodiments, especially laundry detergents.
The compositions manufactured according to the present invention further comprise a sulphiting agent. As used herein, sulphiting agents are compounds capable of yielding sulfite ions in said liquid detergent compositions. Such sulphiting agents include sulphite, hydrogenosulphite or pyrosulphite salts, sulfur dioxide and sulfurous acid, or mixtures thereof. Preferred for use herein are alkali metal sulphites, pyrosulphite or hydrogenosulphite, particularly potassium sulphites. The compositions manufacture
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Blake Alan David
Geudens Jozef Philemona R.
Hardy Paul Andrew
Questel Fabrice Francois J.
Fries Kery A.
Lieberman Paul
Rasser J. C.
The Procter & Gamble & Company
Yetter J. J.
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