Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1998-07-29
2000-10-31
Ogden, Necholus
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510421, 510506, 510636, 510535, 568625, C11D 1722, C11D 172
Patent
active
061402974
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a surfactant composition, more specifically a surfactant composition useful as household and industrial detergents which comprises a specific nonionic surfactant and which exhibits a high penetrating power, and is excellent in detergency.
BACKGROUND ART
Polyoxyethylene-base nonionic compounds have been known for long to be useful as surfactant and detergent, and the physical properties and synthesis methods of them and the emulsifying, solubilizing and cleansing characteristics thereof have been studied and reported in fair detail (see Martin J. Schick, NONIONIC SURFACTANTS PHYSICAL CHEMISTRY (1987) and so on).
Such polyoxyethylene-base nonionic surfactants have high detergency and can also be used favorably in a state combined with other ionic surfactant, so that various combinations thereof with other surfactants have been proposed.
With respect to household and industrial detergents, meanwhile, a formulation having a higher surfactant concentration has recently been required from the standpoints of energy saving in the production or transportation, resource nursing, and diminution in the containers to be disposed of. However, new problems occur with an increase in the surfactant concentration of the detergent. Specifically, a surfactant composition containing a surfactant in a higher concentration fails in removing stains completely owing to its poor penetrating power, when the composition is applied or sprayed directly on stains or the object to be cleansed is immersed in the composition, followed by washing or rinsing in large amount of water.
U.S. Pat. No. 4,134,854 discloses a specific polyalkylene oxide adduct as a low-melting nonionic surfactant. However, this US Patent Specification is silent on the favorable concentration of the surfactant composition containing this adduct or on the penetrating power of the high-concentration surfactant composition containing the adduct.
U.S. Pat. No. 3,567,784 discloses that another specific polyalkylene oxide adduct has a high cloud point and a low gelation temperature. However, this US Patent Specification is silent on the high-concentration surfactant composition containing this adduct.
Furthermore, JP-A 47-9561 (corresponding to U.S. Pat. No. 4,115,457) discloses a process for the preparation of another specific polyalkylene oxide adduct which is useful as a scouring agent or dyeing aid. However, it is silent on high-concentration surfactant compositions exhibiting high penetrating power.
Further, JAOCS, Vol. 63, No. 9, pp. 1201-1208 (1986) discloses the physical properties of similar polyalkylene oxide adducts.
DISCLOSURE OF INVENTION
An object of the present invention is to provide a surfactant composition which exhibits high wetting properties and a high penetrating power for the object to be cleansed even when it contains a surfactant in a relatively high concentration and which exhibits high detergency even when used at an ordinarily low surfactant concentration (0.01 to 1.0 wt. %).
The inventors of the present invention have found that the above object can be attained by a surfactant composition containing a polyoxyalkylene-base nonionic surfactant specified in the mode of addition in a specific amount. The present invention has been accomplished on the basis of this finding.
The present invention relates to a surfactant composition comprising a compound represented by the following general formula (1) and having an average molecular weight of 1,200 or less and water, with the proportion of the compound represented by the general formula (1) to the sum total of the compound and water being 5 wt. % or above but below 50 wt. %: alkenyl; EO represents oxyethylene; PO represents oxypropylene; x and x' represent each a mean number of moles of the ethylene oxide added and are each 1 or above; and y represents a mean number of moles of the propylene oxide added and ranges from 0.5 to 6.0, provided (EO).sub.x, (PO).sub.y and (EO).sub.x' are bonded to each other in block in this order.
The mode for carry
REFERENCES:
patent: 3504041 (1970-03-01), Weipert et al.
patent: 3567784 (1971-03-01), Tsatsos et al.
patent: 3752857 (1973-08-01), Milligan
patent: 4115457 (1978-09-01), Wiedemann
patent: 4134854 (1979-01-01), Milligan
patent: 4624803 (1986-11-01), Balzer et al.
patent: 4745230 (1988-05-01), Otten et al.
Suffactants & Detergents, Journal of the American Oil Chemist's Society, JAOCS, vol. 63, No. 9 (Sep. 1986).
Nonionic Surfactants, Physical Chemistry, Martin J. Schick, 1987, Surfactant Science Series.
Ishii Yasuo
Mori Atsuhito
Sawada Hiroki
Ingersoll Christine
Kao Corporation
Ogden Necholus
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