Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1995-07-13
1997-09-16
Lieberman, Paul
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510228, 510337, 510357, 252321, 252358, E11D 308, E11D 318
Patent
active
056680953
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a suds suppressing system for detergent compositions.
BACKGROUND
The modern conditions of laundry washing, especially in European countries, involve important mechanical agitation in the washing machine thereby promoting the formation of suds in the washing process. It is therefore an essential aspect of modern laundry detergent compositions that they should comprise an efficient suds control system, often referred to also as suds suppressing system.
It is well known in the art that various silicone oils can provide effective suds control, and many prior art documents therefore disclose liquid detergent compositions comprising silicone oils. See for instance U.S. Pat. Nos. 4,798,679, 4,075,118 and EP 150 872.
However, silicone oils suffer a certain number of drawbacks. A major drawback is that the incorporation of silicone oils in liquid detergents may raise physical stability issues as the level of silicone oil is raised. This problem is particularly acute as detergent compositions are formulated which are more concentrated, which is currently the trend in this technical field.
Also, silicone oils are specialty chemicals which are quite expensive. It is therefore an object of the present invention to formulate detergent compositions which have an efficient suds suppressing system, wherein said suds suppressing system comprises a minimal amount of silicone oil.
It has now been found that this object can be met by using a suds suppressing system which comprises a mixture of a silicone oil and a 2-alkyl-alcanol.
2-alkyl-alcanols have been described in DE 40 21 265 as suds suppressors in detergent compositions. The present invention is based on the finding that silicone oils and 2-alkyl-alcanols will act in synergy to control suds. This finding allows to formulate detergent compositions which comprise very low levels of silicone oils. In some instances, it has been found that the level of both the silicone oil and the 2-alkyl-alcanol can be reduced by a factor three in a mixed suds control system according to the present invention, compared to the level needed to achieve the same suds control with either ingredient alone.
SUMMARY OF THE INVENTION
The present invention is a detergent composition comprising a surfactant system and a suds suppressing system, characterized in that said suds suppressing system comprises from 0.06% to 12% of a mixture of a silicone oil, or mixtures thereof, with a 2-alkyl-alcanol, or mixtures thereof.
DETAILED DESCRIPTION OF THE INVENTION
The detergent compositions according to the present invention comprise a surfactant system and a suds suppressing system. The surfactant system comprises one or more surfactants.
The detergent compositions herein comprises from 5% to 60% by weight of the total detergent composition, preferably from 20% by weight to 40% by weight of a surfactant system. Suitable surfactants for use herein include organic surface-active agent selected from nonionic, anionic, cationic and zwitterionic surface-active agents and mixtures thereof.
Suitable anionic surface-active salts are selected from the group of sulfonates and sulfates. The like anionic surfactants are well-known in the detergent art and have found wide application in commercial detergents. Preferred anionic water-soluble sulfonate or sulfate salts have in their molecular structure an alkyl radical containing from about 8 to about 22 carbon atoms. Examples of such preferred anionic surfactant salts are the reaction products obtained by sulfating C.sub.8 -C.sub.18 fatty alcohols derived from e.g. tallow oil, palm oil, palm kernel oil and coconut oil; alkylbenzene sulfonates wherein the alkyl group contains from about 9 to about 15 carbon atoms; sodium alkylglyceryl ether sulfonates; ether sulfates of fatty alcohols derived from tallow and coconut oils; coconut fatty acid monoglyceride sulfates and sulfonates; and water-soluble salts of paraffin sulfonates having from about 8 to about 22 carbon atoms in the alkyl chain. Sulfonated olefin surfac
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Fisk Andrew Albon
Surutzidis Athanasios
Fries Kery A.
Lieberman Paul
Patel Ken K.
Rasser Jacobus C.
The Procter & Gamble & Company
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