JP2691466B2 - Water pollution prevention resin composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water pollution preventing resin composition, and more particularly to a water pollution preventing resin composition useful for preventing pollution of various water such as an aquarium.

(Prior Art and Problems Thereof) In recent years, the taste of taste has been further upgraded and upgraded due to improvement in eating habits. In particular, live fish dishes are booming due to the gourmet boom. These live fish are landed from the fishing grounds and then stored as alive by wholesalers from the market, but by the time they reach the consumers' mouth, they are further cultivated in aquariums such as cooking restaurants, and from landing to cooking. Takes 1-3 months. Conventionally, there are problems that the fish die during the period of fish farming, become sick and become unusable, or lose their fresh taste.

Such problems are caused by pollution of water quality due to increase of carbon dioxide gas concentration, ammonia nitrogen concentration, nitrate nitrogen concentration, hydrogen sulfide concentration, etc. in the water tank. However, simple devices and medicines that can be easily used in individual small-scale restaurants have not yet been developed.

Therefore, an object of the present invention is to solve the above conventional problems,
A water pollution preventing resin composition capable of easily preventing water pollution.

(Means for Solving the Problems) The above object is achieved by the present invention described below.

That is, the present invention provides a water pollution prevention resin composition comprising 99.9 to 50 parts by weight of a thermoplastic resin and 0.1 to 50 parts by weight of the active ingredient (however, the total amount of both is 100 parts by weight), wherein the active ingredient is (a). 10 to 90 parts by weight of at least one zinc compound selected from zinc oxide, zinc chloride, zinc phosphate, zinc nitrate and zinc carbonate, and organic zinc salts, and (b) 90 to 10 parts by weight of organic acid (however, the total of both The amount is 100 parts by weight) and the mixture is a water pollution control resin composition.

(Function) When a zinc compound and an organic acid are mixed with a thermoplastic resin, for example, when granulated into pellets and put in a water tank and brought into contact with water, various pollutants generated from fish in the water tank, particularly ammonia Nitrogen, nitrate nitrogen, and sulfur components such as hydrogen sulfide are adsorbed, and the water in the water tank is purified.

Preferred Embodiment Next, the present invention will be described in more detail with reference to preferred embodiments.

The thermoplastic resin used in the present invention refers to various molded products conventionally used, for example, plastic film, plastic sheet, plastic container, polyethylene resin used for molding fibers, polyolefin resin such as polypropylene, polyvinyl chloride, vinylon. , A synthetic or modified thermoplastic resin such as polystyrene, polyamide, polyester, cellulose acetate, etc., all of these thermoplastic resins can be easily obtained and used from the market, and these thermoplastic resins are solid. It may be a liquid such as a paste or a paste. A particularly suitable thermoplastic resin in the present invention is polyethylene.

The individual active ingredients used in the present invention are all known compounds per se, and (a) zinc compounds include zinc oxide, zinc chloride, zinc phosphate, zinc nitrate and zinc carbonate, as well as zinc acetate and shu At least one selected from organic zinc salts such as zinc acid salt, zinc citrate, zinc fumarate and zinc formate is used. Particularly preferred are zinc white (zinc oxide) and zinc carbonate.

Examples of the (b) organic acid used in the present invention include fatty acids, aromatic acids and polymeric acids.

Preferred aliphatic acids are aliphatic polycarboxylic acids, for example, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, fumaric acid, maleic acid, methylmaleic acid, methylfumaric acid, itaconic acid. ,
Citraconic acid, mesaconic acid, acetylenic acid, malic acid,
Di- or tricarboxylic acids such as methylmalic acid, citric acid, isocitric acid and tartaric acid, or salts thereof, and particularly preferred in the present invention are citric acid and fumaric acid.

Preferred aromatic acids are aromatic polycarboxylic acids such as phthalic acid, terephthalic acid, isophthalic acid,
Trimellitic acid, 1,2,3-benzenetricarboxylic acid, 1,
3,5-benzenetricarboxylic acid, pyromellitic acid, benzenehexacarboxylic acid, naphthalenedicarboxylic acid, naphthalenetricarboxylic acid, naphthalenetetracarboxylic acid,
Aromatic polycarboxylic acids such as diphenyl tetracarboxylic acid, diphenyl ether tetracarboxylic acid, azobenzene tetracarboxylic acid and the like, and particularly preferable aromatic polycarboxylic acid in the present invention is benzene tricarboxylic acid, particularly trimellitic acid. is there.

The polymer acid has a sulfonic acid group, a carboxylic acid group, a sulfuric acid ester group, a phosphoric acid ester group, and a phenolic hydroxyl group in the molecule, and includes, for example, the followings.

I. Polymers having carboxylic acid groups citric acid, tartaric acid,
Polycarboxylic acid such as phthalic acid, ethylene glycol,
Terminal carboxyl group polyesters obtained by reacting polyhydric alcohols such as 1,4 butanediol and diethylene glycol in excess acid; acidic cellulose derivatives modified with various polycarboxylic acids; vinyl ether ester monomers of polycarboxylic acids alone Polymers or random copolymers with general monomers, block copolymers, graft copolymers, etc .; homopolymers of 6 monomers such as acrylic acid or methacrylic acid, or random copolymers with other general monomers. Copolymers, block copolymers, graft copolymers, etc .; homopolymers of α, β-unsaturated vinyl monomers such as maleic anhydride, itaconic acid, etc., or random copolymers with other general monomers, block copolymers Polymers, graft copolymers, etc .; b. Polymers having sulfonic acid groups Cellulose derivatives such as ethyl cellulose hydrogen acetate hydrogensulfate phthalate, cellulose acetate hydrogen hydrogen sulfate phthalate, ethyl cellulose hydrogen sulfobenzoate, sulfone benzyl cellulose acetate, ethyl sulfoethyl cellulose acetate, etc .; polyvinyl alcohol or Sulfonic acid compounds of vinyl alcohol copolymers (for example, o-sulfobenzoic acid, sulfopropionic acid, sulfovaleric acid, sulfobenzaldehyde,
Sulfonic acid-modified polymers with sulfophthalic acid, etc.); Polymers having hydroxyl groups Homopolymers of other monomers containing sulfonic acid or phenol groups or random copolymers, block copolymers, graft copolymers with other general monomers; other carboxyl groups or sulfonic acid groups Alternatively, acidic modified products of various polymers with a phenol group-containing compound may be mentioned.

Particularly preferred are aliphatic acids whose safety has been confirmed as a food additive.

The active ingredient consisting of a zinc compound and an organic acid as described above,
The ratio of their use is also important, and if the total amount is 100 parts by weight, the zinc compound is 10 to 90 parts by weight, and the organic acid is
The ratio is 90 to 10 parts by weight, and the object of the present invention is best achieved in such a combination and a compounding ratio. If the usage ratio is out of the above range, the effect of preventing pollution is obtained but it cannot be said to be optimum.

Further, the above-mentioned active ingredient, when the total amount with the thermoplastic resin is 100 parts by weight, the thermoplastic resin is 99.9 to 50 parts by weight and the active ingredient.
A proportion of 0.1 to 50 parts by weight is preferable, and if the amount of the thermoplastic resin is too small, granulation or molding becomes difficult, while if the amount of the thermoplastic resin is too large, the pollution preventing effect becomes insufficient.

The water pollution control resin composition of the present invention comprises the above-mentioned three components as essential components, and other various conventionally known additives for resins such as colorants, fillers, extender pigments, plasticizers, stabilizers, and ultraviolet rays. Absorbents and the like may be optionally mixed as needed.

Although the water pollution control resin composition of the present invention may be in powder form, it is preferably a molded product, and the molded product can be obtained by simply mixing the above components and compression molding, but in terms of cost, the mixture is melted. A method of kneading and extruding and granulating into pellets or the like is preferable. The particle size of the obtained pellets is about 1-5 m
About m is preferable, but it may be finer or coarser depending on the application. Of course, it is also useful as various molded products having a large surface area.

(Examples) Next, the present invention will be described more specifically with reference to examples.
In the text, parts and% are based on weight unless otherwise specified.

Example 1 80 parts of low-density polyethylene was mixed with 20 parts of a mixture of fumaric acid and zinc oxide in a weight ratio of 8: 2, mixed with a mixer, and a 40 mm extruder (L / D = 28, CR = 3.1, The mixture was kneaded with a screw equipped with Dullage, a cylinder temperature of 130 ° C., and a screw rotation speed of 70 rpm) to obtain a pellet-like water pollution control resin composition of the present invention having a particle size of about 3 mm.

Next, 1 kg of the above resin pellets was placed in a 30-mesh nylon knitting bag, placed in a 10 m ³ tank of live fish, and 50 sea breams, 50 flounders, and 30 yellowtails were cultivated as test areas, and tests were carried out for 2 months. Meanwhile, the seawater in the aquarium is the above resin pellets.
It was circulated through a 30 mesh nylon woven bag containing 1 kg. As a control, another fish tank of the same capacity has 50 sea breams,
50 flounders and 30 yellowtails were cultivated without the pellets. The results of Table 1 below were obtained by comparing the water pollutants in these two types of water tanks.

The survival rate was 77% in the control group and 98% in the test group.

Examples 2 to 5 The following components were used, and the other components were obtained in the same manner as in Example 1 to obtain the water pollution control resin composition of the present invention, and the performance was measured in the same manner as in Example 1. The same results were obtained. Was obtained.

Example 2 60 parts of high density polyethylene 40 parts of an 8: 2 mixture of zinc oxide and citric acid Example 3 70 parts of polypropylene 30 parts of a 5: 5 mixture of zinc carbonate and malic acid Example 4 75 parts of polystyrene Zinc chloride and polyacrylic acid 3: 7 mixture of Example 5 Polypropylene 70 parts 5: 5 mixture of zinc oxide and trimellitic acid 30 parts Example 6 A molded product having a honeycomb structure was prepared using 1 kg of the resin pellet of Example 1, and 10 m ³ of live fish was prepared. Installed in the aquarium, 40 sea breams, 50 flounders, and 30 yellowtails were cultivated as test areas.
I tested for a month. Meanwhile, seawater in the water tank was allowed to circulate through the honeycomb layer of the above-mentioned molded product. On the other hand, in another aquarium having the same capacity as a control group, 40 sea breams, 50 flounders and 30 yellowtails were cultivated without installing the above-mentioned molded body. Comparing the water pollutants in these two types of aquariums, the following second
The results in the table were obtained.

The survival rate was 70% in the control group and 95% in the test group.

Further, when the test plot and the control plot were compared in Examples 1 to 5, it was clearly visible that the seawater in the control plot was cloudy and that the test plot was transparent.

(Effect) According to the present invention as described above, when a zinc compound and an organic acid are mixed with a thermoplastic resin, for example, when granulated into pellets and put in a water tank and brought into contact with water, the fish are generated in the water tank. The various pollutants, particularly ammonia nitrogen, nitrate nitrogen, and sulfur components such as hydrogen sulfide are adsorbed, and the water in the water tank is purified.

Claims (3)

(57) [Claims] 1. A thermoplastic resin 99.9 to 50 parts by weight and an active ingredient.
In a water pollution control resin composition consisting of 0.1 to 50 parts by weight (however, the total amount of both is 100 parts by weight), the active ingredient is (a) zinc oxide, zinc chloride, zinc phosphate, zinc nitrate and zinc carbonate and organic compounds. Water quality characterized by being a mixture of 10 to 90 parts by weight of at least one zinc compound selected from zinc salts and (b) 90 to 10 parts by weight of organic acid (however, the total amount of both is 100 parts by weight). Pollution control resin composition. 2. The water pollution control resin composition according to claim 1, wherein the organic acid is a fatty acid. 3. The water pollution control resin composition according to claim 1, which is in the form of pellets.