Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1997-06-06
1999-12-14
Gupta, Yogendra N.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510245, 510255, 510365, 510401, 510417, 510463, C11D 700, C11D 318, C11D 344, C11D 1402
Patent
active
060017937
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to cleaning compositions of optimized cleaning power which have anti-corrosion, anti-hard surface stress crazing, and anti-polyimide coated wire stress crazing properties. Additionally, a method for cleaning substrates with these compositions is provided.
BACKGROUND OF THE INVENTION
Cleaning of industrial machinery often presents unusual cleaning problems. Any given piece of machinery may include components made of many types of materials. Because of the complexity or the individual inaccessibility of the multiple components of such machines, a variety of components can be in contact with the cleaning composition during the cleaning process. Therefore, it is not only necessary for a cleaning composition clean properly, but the composition also must avoid causing damage to the various components and to the various materials in the components of the equipment.
A problem of this type was recognized by the United States Government when it published Military Specification No. MIL-C-87937B on Jan. 27, 1994, which discloses the requirements for cleaning compositions for aerospace equipment. These cleaning compositions must meet particular cleaning effectiveness standards and must not have specific detrimental effects on machinery components. For example, the composition cannot adversely affect painted and unpainted metal surfaces, cannot cause corrosion, and cannot cause stress crazing on acrylic or polycarbonate plastic. Additionally, it must not affect polysulfide sealants, and it must be compatible with rubber.
It has now been discovered that terpene-based cleaning compositions can be prepared which have properties appropriate for the industrial cleaning of multi-component machinery. These compositions are effective cleaners that avoid detrimental effects to the components of machinery, such as, for example, aircraft, aerospace ground equipment, and aerospace ground equipment engines. The presently disclosed combination of certain solvents, surfactants, and inhibiting agents yields a wide range of properties that are not typically attributed to these components. Furthermore, the combination of components yields an environmentally acceptable oil removing composition that cleans soiling, such as for example, oils, greases, particulates, carbon tracks, and the like, from a substrate. These compositions can form a water and oil emulsion with any oil in the soiling for a time sufficient to remove the oil and other soiling from the substrate, but then release free water from the emulsion. This is known as oil splitting.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a graphic illustration of emulsion stability.
SUMMARY OF THE INVENTION
According to the present invention, there are provided cleaning compositions for removing soils from a substrate. These compositions comprise: oil and water emulsion with the oil for a time sufficient to remove the oil from the substrate, the oil removing emulsion releasing free water within twenty-four hours after formation; the composition having a pH of less than about 10.
Also contemplated by the present invention is a method for cleaning a substrate with these cleaning compositions.
DETAILED DESCRIPTION OF THE INVENTION
The cleaning compositions of the present invention are suitable for use in a variety of environments.
The solvents suitable for use in the present invention are C.sub.10 or higher terpene hydrocarbons and poly(C.sub.10 or higher terpene hydrocarbons). Such terpenes include, but are not limited to, limonene, .alpha.-pinene, .beta.-pinene, cis-pinene, camphene, .delta.-3-carene, terinolene, .alpha.-terpene, .gamma.-terpinene, isoterpinoline, .beta.-phellandrene, myrcene, ocimene, alloocimene, citronellene. Also included are all optical isomers of such terpenes and mixtures of one or more of such terpenes.
Particularly preferred is d-limonene. D-limonene is a by-product of the citrus industry, typically derived from the rinds or peels of citrus fruits.
Compatible co-solvents such as for example, glycolethers, ca
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Figdore Phillip E.
Good Charles J.
Gupta Yogendra N.
Penetone Corporation
Petruncio John M
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