Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – With halogen – nitrogen – oxygen – or phosphorus containing...
Patent
1999-11-29
2000-12-26
Hardee, John
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
With halogen, nitrogen, oxygen, or phosphorus containing...
510102, 424405, C11D 320
Patent
active
061659649
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an aqueous solution of essential oil and a process for preparing thereof. The present invention also relates to antimicrobial agents, microbicides and antimicrobial finishes for washing which contain the aqueous solution as an active ingredient.
BACKGROUND OF THE INVENTION
Various aromatic compounds are contained in woods and grasses, and various kinds of essential oil may be obtained from their leaves; blossoms, flowers, and their buds; barks, branches, stems and roots. Among these plants which contain such essential oil, there are crude drugs such as an aromatic stomachic, which have been used from ancient age. The essential oil, which is also the active ingredient for the crude drug, is a liquid mixture of several ten to two hundred compounds such as terpenoides, polyterpenoides, and phenols, and the rate of terpene is major.
As mentioned above, the essential oil may be obtained from various plants, but several essential oils obtained from trees such as Juniperus virginiana L., Cypress sempervirens L. var. stricta Ait., Chamaecyparis obtusa (Seib. et Zucc.) Endl. forma formosana Hayata, Juniperus utilis Koidz., Chamaecyparis obtusa Endl., Chamaecyparis formosensis Matsum., Thujopsis dolabrata Seib. et Zucc. var. Hondai Makino have anti-microbial activities or microbicide activities. Among such essential oils, it is known that hinokitiol contained in those obtained from Chamaecyparis obtusa (Seib. et Zucc.) Endl. forma formosana Hayata or Thujopsis dolabrata Seib. et Zucc. var. Hondai Makino has anti-microbial activities.
Hinokitiol is an acidic crystalline having a seven membered ring, and it is contained in the leaves or trees of Chamaecyparis obtusa (Seib. et Zucc.) Endl. forma formosana Hayata in Taiwan or the leaves, branches and stems of Thujopsis dolabrata Seib. et Zucc. var. Hondai Makino grown up in Aomori prefecture or Hokkaido.
Compounds detected as the components contained in the essential oils have a low molecular weight, and many of them are oily and a few of them are hydrophilic. Accordingly, it is difficult to mix the essential oil and water without using any surface active agent.
In general, oil and water can not be mixed homogeneously, but they may be mixed homogeneously depending on their mixing ratio. For example, a homogenous aqueous liquid can be prepared by extracting essential constituents with hot water from particular sources, soup for Chinese noodle or broth from a dried bonito is thus obtained. In such extract, a small amount of oil is dissolved in water. In the industrial process, for example, oil is vaporized by using contrabo to expose it to oxygen or other gas materials under pressure and at a certain temperature to allow the oil to mix with water.
However, the above-mentioned process includes the following problems. In the extracting process, the production cost is expensive, and it is impossible to produce such extract in a large scale. In the process by using contrabo, such extract may be produced in a large scale, but the cost is expensive. Furthermore, this process is performed under enhanced pressure and high temperature, the chemical structure of the objective components can be changed, and this makes it difficult to obtain an the aqueous extract containing the objective components.
Accordingly, such extracts can be used only for goods having high added value, for example, foods, food additives, and pharmaceuticals. Furthermore, in some cases, it is impossible to use aqueous extracts containing objective compounds with unchanged chemical structure.
It is known that hinokitiol is a compound having a seven-membered ring structure, and having excellent antimicrobial activity, particularly, antifungal activity, as well as it is safe compounds because resistant strains to hinokitiol scarcely appear. Therefore, wooden material from Chamaecyparis obtusa (Seib. et Zucc) Endl. forma formosana Hayata) has been used for a counter in sushi restaurant. Further, it is known that antimicrobial agents for washing
REFERENCES:
patent: 5658584 (1997-08-01), Yamaguchi
Nishimoto Kiyohiro
Nishimoto Tetsuro
Cosmo Ace Co.
Hardee John
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