Coating processes – Plant member or animal specimen coating
Patent
1985-05-24
1987-06-02
Morris, Theodore
Coating processes
Plant member or animal specimen coating
47 58, 106 1505, 106 1811, 106 1826, 426335, A01G 506, B28B 318
Patent
active
046702881
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
This invention relates to a novel composition containing divalent iron ions having various chemical and physiological effects such as deodorization, bactericidal action, freshness-preservation of foods, promotion of plant growth and flame-proofing (flame-retardation) of burnable materials.
2. Background Art
Iron (II) compounds such as ferrous sulfate have a wide variety of utility. However as is well-known, divalent iron ions have a nature, when they are left in the form of aqueous solution, of readily undergoing oxidation by dissolved oxygen or air to turn yellowish brown and result in precipitation. It has been practiced to incorporate hydroxylamines, tin compounds or the like as reducing agents in order to avoid the oxidation of the ferrous ions in the aqueous solution but, since these substances are highly toxic to the human body, application uses of aqueous solutions containing divalent iron ions has been limited.
The present inventors have proposed a chemically active aqueous solution and solid substance containing a small amount of L-ascorbic acid together with divalent iron ions as a composition in which an aqueous solution containing divalent iron ions is stabilized and provided with vairous functions (PCT/JP83/099: Japanese Patent Laid-Open No. 132937/1984). However, since this composition itself is an aqueous solution, the storage and the handling of the solution has been troublesome and the method of use been restricted to impregnation and dipping using water absorbing material as the carrier in the case of the solid matter.
DISCLOSURE OF THE INVENTION
The first object of this invention is to provide a composition of an aqueous solution containing divalent iron ions and the drying product thereof (powder, granules) which is further stabilized while maintaining activities. The second object of this invention is to provide new application uses of the thus stabilized chemically active composition containing divalent iron ions. The third object of this invention is to provide novel multi-function materials equipped with one or more of functions at the same time by applying the chemically stable and stabilized composition.
According to this invention, a novel composition containing divalent iron ions, capable of satisfying the foregoing objects, are extremely stable and have various chemical and physiological activities such as deodorization, bactericidal action, preservation of freshness of foods, growth promotion of plants and flame-proofing treatment (flame-retardation) for burnable materials.
This composition is characterized in that it contains an iron (II) compound, ascorbic acid and/or citric acid and alum, and contains the divalent iron ions in the iron (II) compound and ascorbic acid or citric acid in 1:0.02-0.30 (in the case of ascorbic acid) or 1:0.01-0.80 (in the case of citric acid) by weight ratio.
As the examples of the iron (II) compound usable in the composition according to this invention, there can be mentioned iron (II) salts of inorganic acids such as ferrous sulfate, ferrous chloride, ferrous nitrate, ferrous bromide and a ferrous iodide, as well as iron (II) salts of organic acids such as ferrous gallate, ferrous malate and ferrous fumarate. However, the iron (II) compound are not restricted only to those exemplified above but any of the compounds may be used so long as it can be dissolved in water to form divalent iron ions.
While L-ascorbic acid and D-isoascorbic acid are used as ascorbic acid, L-ascorbic acid is preferred.
In this invention, ascorbic acid and citric acid may be used singly or in combination. In the case of the combined use, citric acid may be used in a small amount since it acts in an auxiliary manner as a stabilizer to ascorbic acid.
In this composition, the weight ratio of the iron (II) in the iron (II) compound and ascorbic acid is preferably between 1:0.02 and 0.13 (about 0.006-0.04 mol of ascorbic acid per one mol of ferrous salt by molar ratio) and, more preferably, between 0.05 and 0.13 (0.016-0.04 mol of ascorbic a
REFERENCES:
patent: 1797572 (1931-03-01), Fulton et al.
patent: 2381487 (1945-08-01), Cook et al.
patent: 4110508 (1978-08-01), Isgur et al.
patent: 4384972 (1983-05-01), Nakamura et al.
Chem. Abst., 55: 889i, Lehman et al, Apr. 11, 1957.
Fukui Ryosuke
Ikari Yoshikatsu
Ohama Chiaki
Yokoyama Shoichiro
Director--General of Agency of Industrial Science and Technology
Minato Sangyo Co., Ltd.
Morris Theodore
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