Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Patent
1997-07-31
1999-08-31
Ogden, Necholus
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
510352, 510429, 510425, 560147, C11D 1700, C07C32100
Patent
active
059453940
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to detergent compositions comprising one or more anionic sulfate or sulfonate surfactants. More particularly, the invention relates to heavy duty liquid detergent compositions comprising a sulfonated alkyl ester, at least one primary anionic surfactant, and nonionic surfactant. It relates to detergent compositions which possess desirable cleaning and sudsing properties, are mild, and are especially suitable for use in manual and machine laundry applications.
DESCRIPTION OF THE RELATED ART
Heavy duty liquid (HDL) detergent compositions are intended to clean clothes made of cotton, polyester, wool, cotton/polyester blends, silk, etc. HDL detergents typically fall into one of three categories: built detergents, unbuilt detergents, and detergents for fine fabric cold water washing.
Unbuilt products, i.e., those containing no builder, are composed of anionic surfactants, typically linear alkyl benzene sulfonates (LAS), ether sulfate, and a nonionic surfactant typically a fatty alcohol ethoxylate. The function of anionic surfactants is to remove and suspend particulate soil while nonionic solubilizes, disperses and emulsifies oily soil. The systems utilizing LAS usually have poor cleaning performance, this is especially true in hard water.
Built HDL systems, i.e., detergents having builders, contain surfactants in addition to a certain level of builder. Builders function to protect the surfactant, in particular LAS, alkyl sulfate, and alpha olefin sulfonate, from precipitating in dilute or hard water. In addition, builders are good sources of alkalinity and help improve cleaning performance. Despite incorporation of builders in such compositions, their cost/performance efficiency has major shortfall.
To minimize the shelf space required for displaying detergent products, many attempts have been made to prepare cost efficient, highly concentrated detergents having good cleaning at use concentration.
Preparation of concentrated products having high levels of surfactants requires higher levels of hydrotrope to fluidize the composition. However, concentrating product via incorporation of high levels of builder into the detergent increases the cost of manufacturing as well as increases the difficulty of dispersion and disolution especially in cold water. Some highly built products are in the form of structured liquid and have an appearance similar to that of fabric softeners.
Thus, there exists a need for highly concentrated heavy duty liquid detergent compositions that do not require the presence of builder for cleaning efficiency or classical hydrotrope for fluidity and that are capable of providing good cleaning of fabrics at low use concentrations and especially in cold to warm temperature washing conditions.
SUMMARY OF THE INVENTION
The compositions of the present invention are cost efficient unbuilt concentrated heavy duty liquid detergents with high cleaning efficacy comprising:
The invention provides HDL detergents that do not require the presence of builders for improved cleaning efficiency. The invention further provides fluid HDL detergents that do not require the addition of classical hydrotopes. The inventive highly concentrated, stable fluid compositions are highly surface active and very effective in cleaning a variety of fabrics with different types of soils at a low use concentration in water and perform extremely well even under cold temperature washing conditions. The compositions of the present invention show anti-redeposition properties which makes them especially useful for cleaning non-polar synthetic fabrics and blends of synthetic and natural fabrics. In addition, the inventive compositions when combined with silicone, fatty acid soaps and EO/PO/EO or PO/EO/PO block copolymer defoamers are very useful in front loading European style washing machines. Furthermore, the inventive compositions exhibit excellent surface activity and extremely low CMC's (critical micelle concentration) which demonstrates synergy between the sulfonated alky
REFERENCES:
patent: 5429773 (1995-07-01), Sherry et al.
patent: 5616781 (1997-04-01), Sajic et al.
patent: 5637758 (1997-06-01), Sajic et al.
Malik Arshad
Ryklin Irma
Sajic Branko
Ogden Necholus
Stepan Company
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