Chemistry: molecular biology and microbiology – Enzyme – proenzyme; compositions thereof; process for... – Oxidoreductase
Patent
1999-05-03
2000-10-03
Prats, Francisco
Chemistry: molecular biology and microbiology
Enzyme , proenzyme; compositions thereof; process for...
Oxidoreductase
435190, 435189, 549381, 549414, 549415, 10628723, C12N 908, C07D31178, C09D 502
Patent
active
061271578
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a paint comprising proanthocyanidine.
BACKGROUND ART
Coating of wood is generally clear coating which is finished by directly expressing the quality and grain of the wood, and the main part of this coating art comprises the coating of furnitures. However, the coating of woods unlike that of metal materials has a disadvantage that such coating cannot be treated regularly due to the type of woods. That is, the properties of woods are distinguished from each other depending on the kinds of trees, the grains of the surface will vary depending on the sawings of woods, the stretching properties will vary depending on the directions of grains, and the tissues of the woods are uneven and thus result in different absorption of a coating.
On the other hand, the clear coating of woods had been started with oily varnish and lac varnish, and then a variety of synthetic coatings and coating methods have been developed by way of cashew coatings as an alternative of glue. Furthermore, the coloring methods with chemical agents have been practiced, but such coatings in the prior art often employ organic solvents, thus resulting in the inconvenience for their handling as well as environmental pollution. In addition, such coatings have also a problem that the coatings are malodorous not only during coating but also after coating, and that such coatings are hardly coated uniformly.
DISCLOSURE OF THE INVENTION
The object of the present invention is to provide a coating suitable for the coating of woods.
The present inventors have conducted examinations in order to solve the above described problems, and found that proanthocyanidine can be used as an oil stain-like coating.
Proanthocyanidine is known to have a variety of physiological activities such as anti-oxidation, anti-mutagenesis, cosmetically skin-whitening effect, arteriosclerosis-myocardial infarction preventing effect, vessel protecting effect, anti-tumor effect, angiotensin transferase inhibiting effect, anti-bacterial effect and deodorant effect, but no reports have been described about the use as a coating material.
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described specifically below.
Proanthocyanidines are the condensed type tannins present in various plant bodies, i.e. the compounds in which flavan-3-ol or flavan-3,4-diol as the constructing units are combined by condensation or polymerization. These compounds are referred to as proanthocyanidines because of the production of anthocyanidines such as procyanidine, delphinidine and pelargonidine by their treatment with acid. Proanthocyanidines such as procyanidine, prodelphinidine and propelargonidine, and their steric isomers which are the dimer, trimer, tetramer as well as decamer or higher polymer of the above described constituent units can be obtained by the extraction of a variety of plant bodies such as seeds of grape, cranberry fruit, apple fruit, soybean, or barks of cedar, Japanese cypress or pine tree.
These proanthocyanidines are commercially available, and include for example "KPA" (manufactured by Kikkoman Corp.) which is made from grape seeds, "APPLEPHENONE" (The Nikka Whiskey Distilling Co., Ltd.) made from the pre-mature fruit of apple, "PICNOGENOL" (Horphag Research Limited; GB), and the like.
These proanthocyanidines may be used as coating materials by dissolving proanthocyanidine into water or water-containing alcohol in a concentration of 0.1-10% and coating the solution by the conventional method, e.g. applying with brush or spraying with atomizer. Proanthocyanidine in the solution may be freely set up at a concentration of 0-100%, and the higher concentration solution may be obtained by warming the proanthocyanidine in water or aqueous alcohol due to the relationship of the solubility of proanthocyanidine. By way of example, proanthocyanidine is dissolved at a concentration of 0.1-10% in water or aqueous alcohol at an ordinary temperature, and at a concentration of 10-50% at 35-70.degree. C.
The higher co
REFERENCES:
patent: 5470874 (1995-11-01), Lerner
patent: 5569458 (1996-10-01), Greenberg
Oszmianski et al. Journal of Food Science, vol. 50, pp. 1505-1506, 1985.
CAPLUS abstract of Romanian Pat. No. 93,487 B1; Domide et al, Dec. 1987.
Hatamoto Osamu
Nakano Eiichi
Coe Susan D.
Kikkoman Corporation
Noda Institute for Scientific Research
Prats Francisco
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