JP2003327815A - Electrical apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical apparatus produced by using a polymer member decomposing in soil. <P>SOLUTION: The electrical apparatus contains a polymer member produced by mixing and dispersing a plant growth promoting inorganic material in a spontaneously decomposable resin. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device having a member containing a plant growth promoting inorganic substance and a naturally disintegrating resin, the member, and a decomposition treatment method for the member.

[0002]

2. Description of the Related Art Plastics have now spread to all fields of life and industry, and the annual production of plastics has reached 100 million tons. Most of them are discarded after use, which has been recognized as one of the causes of disturbing the global environment. At present, the most noticeable solution is the recycling of plastics and the use of naturally disintegrating resins centered on biodegradable polymers.

Regarding plastic recycling, the Home Appliance Recycling Law started in April 2001 in order to recycle used electric products. Except for four large electric products such as TV, refrigerator, cooler, and washing machine,
There is no collection or recycling of waste products and no legal restrictions. Therefore, most electric products are thrown away as non-combustible waste at the time of disposal. Even if the shape is small, if a large number of units are sold, a large amount of waste is generated as a whole. This is a serious problem nowadays due to the lack of waste disposal sites.

As a treatment method which is frequently used nowadays, there is a method of shreddering waste. However, this shredder treatment only reduces the volume of waste, and if landfilled, the waste remains as it is for decades or hundreds of years and is not a basic solution. Even if the shredder dust is material-recycled, since all parts are finely crushed, for example, valuable materials such as copper are also mixed with other low-value materials, resulting in decreased purity and recovery. There are problems such as deterioration of efficiency.

On the other hand, the use of a naturally disintegrating resin centering on a biodegradable polymer is considered to have the following two advantages. The first point is that casings and structures that occupy most of the volume of electrical products are made of naturally disintegrating resin centering on biodegradable materials, and non-biodegradable parts such as electronic parts and substrates. If, for example, has a structure that can be easily divided, such as a screw stop or a fitting structure, the recovery efficiency can be increased because the part to be recycled and the biodegradable part that can be discarded as it are can be processed separately by a simple dismantling process. It is expected.

The second point is, for example, a radio, a microphone,
The outermost surface of the case such as a neck TV, a keyboard, a walkman, a mobile phone, a radio-cassette, an earphone is made of a naturally disintegrating resin centered on a biodegradable material. By making the parts that often come into contact with the human body with natural degradable resins centered on biodegradable materials, it is possible to use electricity that is safer to the human body and the environment than ordinary synthetic resins. Products can be provided.

However, the type of naturally disintegrating resin centering on the biodegradable polymer used for the above-mentioned applications is not limited to any kind, and it is appropriate to use it as a casing or a structural material for electric products. Physical properties are required. The present inventors have, for example, a temperature of 80 ° C. and a humidity of 80%.
It was found that it is at least necessary that the physical properties are not deteriorated even if it is kept for 48 hours in the atmosphere.

Naturally disintegrating resins centering on biodegradable polymers are organic materials that are decomposed and assimilated by the action of the natural world and living organisms, and have been developed as ideal environmentally compatible materials. Examples of such biodegradable polymers include polysaccharide derivatives such as cellulose, starch, dextran and chitin, peptides such as collagen, casein, fibrin and gelatin, and polyamino acids such as polyvinyl alcohol such as nylon 4 and nylon 2. Examples thereof include polyamides such as / Nylon 6 copolymer, and aliphatic polyesters.

An aliphatic polyester resin, which is a typical example of a biodegradable polymer, generally has a low melting point, has insufficient physical properties (particularly heat resistance and impact resistance) suitable for a practical molded article, and is an inorganic filler. Various studies have been carried out, such as addition, improvement of crystallization rate by addition of crystal nucleating agent, blending with biodegradable resin showing rubber-like properties with low glass transition point, and such plastics were used. Regarding the molded product, some patent applications have already been filed (Japanese Patent Laid-Open No. Hei 3).
-290461, JP-A-4-146952, JP-A-4-325526). These molded products are used as films and packaging materials, and durability is not particularly required.

On the other hand, when the biodegradable aliphatic polyester resin is applied to housings of electric products, electronic devices, etc., heat resistance as well as long-term reliability (durability under constant temperature and humidity conditions) are required. Electric products and electronic devices have a variety of product lives, but it is necessary for small audio products to maintain their physical properties for 3 to 7 years under the conditions of 30 ° C. and 80% relative humidity. Considering the environment in which electric products and electronic devices are used under various temperature and humidity conditions, the current biodegradable polyester has a problem in terms of long-term reliability as described above. , It could not be used for the housing of electronic devices. At present, biodegradable polymers are mainly used for aliphatic polyester resins, materials for agriculture, forestry and fisheries (films, planting pots, fishing lines, fishnets, etc.), civil engineering materials (water retaining sheets, plant nets, sandbags, etc.), packaging, It has begun to be used in the container field (things that soil, food, etc. adhere to and are difficult to recycle).

As described above, when the biodegradable polyester resin is used for electric appliances, housings of electronic devices, etc., the physical properties are first kept under constant temperature and humidity conditions (for example, 80 ° C., relative humidity 80%) for at least 48 hours. The minimum requirement is that no decline occurs. Even with the current biodegradable polyester, such as polylactic acid, which has the highest heat resistance,
When an aging test at 0 ° C. and 80% relative humidity is performed for 48 hours, the molecular weight is reduced by 60% due to hydrolysis, and it is difficult to apply it to housing materials for home electric appliances. As a factor causing such deterioration of physical properties, that is, hydrolysis,
For example, in the case of polyester, it is known that the carboxyl group at the terminal of the polymer chain catalytically hydrolyzes the ester bond in the molecular chain. In order to ensure long-term reliability, the inventors of the present invention catalytically hydrolyze the main chain of active hydrogen in functional groups having active hydrogen such as carboxyl groups and hydroxyl groups in biodegradable plastic during use of the product. Physical properties (eg strength, hydrolysis resistance, heat resistance) by preventing decomposition
In order to maintain the above properties, we examined the plastic material that is hydrolyzed after disposal and decomposed by microorganisms that are generally present in nature.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric device using a member having a plant growth promoting effect. More specifically, it is an object to provide an electric device using a member containing a plant-development-promoting inorganic substance in a naturally disintegrating resin mainly composed of a biodegradable plastic material capable of ensuring long-term reliability.

[0013]

In order to solve the above-mentioned problems, an electric product according to the present invention is an electric device having a member in which a plant growth promoting inorganic substance is mixed and dispersed in a naturally disintegrating resin. The degradable resin is an electric device in which the biodegradable plastic is, and the biodegradable plastic is
A biodegradable polyester, wherein the biodegradable polyester is polylactic acid. And, as the plant growth promoting inorganic substance, an electrical device containing an inorganic compound having nitrogen, phosphorus, potassium as a constituent element,
The plant growth promoting inorganic substance is an electric device which is a solid particle, and the solid particle is a surface-treated electric device. Furthermore, the present invention provides a member for electric equipment in which a plant growth promoting inorganic substance is mixed and dispersed in a naturally disintegrating resin. Furthermore, the member can be replaced without impairing the function of the electric device, and is buried in the soil at the end of use and decomposed in the soil.

That is, the present invention provides: (1) an electric device comprising a member in which a plant growth promoting inorganic substance is mixed and dispersed in a naturally disintegrating resin, and (2) the naturally disintegrating resin is a biodegradable plastic. The electric device according to (1) above, (3) the biodegradable plastic is a biodegradable polyester, and the electric device according to (2) above, (4) The biodegradable polyester is polylactic acid, the electric device according to (3) above, and (5) the plant growth promoting inorganic substance is one or more elements selected from the group consisting of nitrogen, phosphorus and potassium. The electric device according to (1) above, which further comprises an inorganic compound having as a constituent element.

Further, the present invention (6) is characterized in that the plant growth promoting inorganic material is solid particles.
(7) The electric device as described in (6) above, wherein the solid particles are surface-treated.
(8) The electric device according to (6), wherein the solid particles are surface-treated with a surfactant.
The electric device according to (1) above, wherein the member is replaceable without impairing the function of the electric device.

The present invention also provides (10) a member in which a plant growth promoting inorganic substance is mixed and dispersed in a naturally disintegrating resin, (1)
1) The member according to the above (10), wherein the naturally disintegrating resin is a biodegradable plastic, (12)
The member according to (11) above, wherein the biodegradable plastic is biodegradable polyester,
3) The member according to (12) above, wherein the biodegradable polyester is polylactic acid, and (14) one or more members selected from the group consisting of nitrogen, phosphorus and potassium, wherein the plant growth promoting inorganic substance is selected from the group consisting of nitrogen, phosphorus and potassium. The member according to (10) above, which comprises an inorganic compound having an element as a constituent element.

Further, the present invention (15) is characterized in that the plant growth promoting inorganic substance is solid particles.
(0) The member according to (0), (16) The member according to (15) above, wherein the solid particles are surface-treated.
(17) The member as described in (15) above, wherein the solid particles are surface-treated with a surfactant, (18)
(1) A part of an electric device, which can be replaced without impairing the function of the electric device.
0) The member according to 0), and (19) a method for decomposing a member for electric equipment, which comprises burying the member in which a plant-growth-promoting inorganic substance is mixed and dispersed in a naturally disintegrating resin in soil after use.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The spontaneously disintegrating resin or polymer material of the present invention means a material which, when left in the natural world, is disintegrated or promoted by natural light mainly composed of sunlight, and is oxidized by oxygen in the natural world. Materials that are disintegrated or promoted by water, materials that are disintegrated or promoted by water in nature, and materials that are disintegrated or promoted by the physiological activity of organisms composed mainly of natural microorganisms, or Includes materials that are disintegrated or promoted by the combined action of Examples of these materials include vinyl ketone copolymers represented by ethylene-carbon monoxide copolymer, ethylene-methyl vinyl ketone, and ethylene-ethyl vinyl ketone, as materials that are disintegrated or accelerated by light. As the vinyl compound in the copolymer, for example, styrene or propylene can be used appropriately. In addition, organic polymers blended with aromatic ketones such as benzophenone, acetophenone, and anthraquinone, which are photosensitizers having a functional group represented by a carbonyl group, or organic compounds blended with a metal compound that promotes photodegradation. Molecules, and organic polymers blended with optical semiconductors such as titanium oxide and zinc oxide are also included. On the other hand, examples of biodegradable polymers as raw materials for so-called biodegradable plastics, which are materials that are disintegrated or promoted by the physiological activity of organisms composed mainly of microorganisms in the natural world, include, for example, cellulose, starch, dextran, and chitin. Polysaccharide derivatives, for example, peptides such as collagen, casein, fibrin, gelatin, etc., for example, polyamino acids, for example, polyvinyl alcohol, for example, polyamides such as nylon 4, nylon2 / nylon 6 copolymers, for example, polyglycolic acid, polylactic acid, polysuccinic acid Examples thereof include polyesters such as esters, polyoxalic acid esters, polyhydroxybutyric acid, butylene polydiglycolate, polycaprolactone, and polydioxanone, and there are many types, and any of them can be used in the present invention. That is, the biodegradable polymer is an organic material that is decomposed and assimilated by the action of the natural world or a living body, is an ideal material suitable for the environment, and may be any material as long as the object of the present invention is not impaired. Absent. Of these, biodegradable polyester is particularly preferable.

The biodegradable polyester suitable as the biodegradable plastic may be a biodegradable polyester alone, or may have an amino group and / or an amide bond with the biodegradable polyester as long as the object of the present invention is not impaired. It may be a copolymer with a biodegradable polymer having it, or a mixture of a biodegradable polyester and a biodegradable polymer having an amino group and / or an amide bond. Examples of the biodegradable polymer having an amino group and / or an amide bond include polyamino acids and biodegradable polyamides such as nylon.

The biodegradable polyester used in the present invention is a polymer having an ester bond; -CO-O- in the main chain, and is not particularly limited as long as it is a polyester metabolized by a microorganism. Moldability, heat resistance,
Aliphatic polyester resins having impact resistance are preferred.

Examples of the aliphatic polyester resin include polyoxalic acid ester, polysuccinic acid ester, polyhydroxybutyric acid, butylene polydiglycolate, polycaprolactone, polydioxanone, and polymers of oxyacids such as lactic acid, malic acid or glycolic acid, or Examples thereof include hydroxycarboxylic acid-based aliphatic polyester resins such as copolymers thereof. Of these, a hydroxycarboxylic acid-based aliphatic polyester resin typified by polylactic acid is particularly preferable.

The naturally disintegrating resin used in the present invention can be synthesized by a method known per se. For example, a biodegradable polyester suitable as a naturally disintegrating resin is a lactide method, polycondensation of a polyhydric alcohol and a polybasic acid, or intermolecular polycondensation of a hydroxycarboxylic acid having a hydroxyl group and a carboxyl group in the molecule. Is mentioned. The lactide method is a method for producing a biodegradable polyester by ring-opening polymerization of cyclic diesters and corresponding lactones. Examples of such cyclic diesters include lactide and glycolide, and examples of the lactone include ε-caprolactone, β-propiolactone, γ-butyrolactone and δ-valerolactone. Examples of the polyhydric alcohol used in the polycondensation of polyhydric alcohol and polybasic acid include, for example, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, neopentyl glycol, 1,3-butanediol, 1,4-butanediol. 1,6-hexanediol and the like, and examples of the polybasic acid used therefor include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, orthophthalic acid and naphthalenedicarboxylic acid; for example, adipic acid and sebacic acid. , Aliphatic carboxylic acids such as oxalic acid, succinic acid, succinic anhydride, maleic acid, maleic anhydride, fumaric acid, and dimer acid; alicyclic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid are typical examples. it can. In the present invention, since aliphatic polyester is preferable, it is preferable that both polyhydric alcohol and polybasic acid, which are raw materials, are aliphatic compounds.

The intermolecular polycondensation of a hydroxycarboxylic acid having a hydroxyl group and a carboxyl group in the molecule can be obtained by a through-pass dehydration condensation method of the corresponding hydroxycarboxylic acid. Examples of such a hydroxycarboxylic acid include lactic acid, 2-hydroxyacetic acid, 2-hydroxypropanoic acid, 2-hydroxybutyric acid, 2-hydroxyvaleric acid, 2-hydroxyhexanoic acid, 2-hydroxyheptanoic acid, 2-hydroxyoctane. Acid, 2-hydroxy-2-methylpropanoic acid, 2-hydroxy-2-methylbutyric acid, 2-hydroxy-2-ethylbutyric acid, 2-hydroxy-2-methylvaleric acid, 2-hydroxy-2-ethylvaleric acid, 2-hydroxy-2-propylvaleric acid, 2-
Hydroxy-2-butylvaleric acid, 2-hydroxy-2-
Methylhexanoic acid, 2-hydroxy-2-ethylhexanoic acid, 2-hydroxy-2-propylhexanoic acid, 2-
Hydroxy-2-butylhexanoic acid, 2-hydroxy-
2-pentylhexanoic acid, 2-hydroxy-2-methylheptanoic acid, 2-hydroxy-2-ethylheptanoic acid,
2-hydroxy-2-propylheptanoic acid, 2-hydroxy-2-butylheptanoic acid, 2-hydroxy-2-pentylheptanoic acid, 2-hydroxy-2-hexylheptanoic acid, 2-hydroxy-2-methyloctanoic acid, 2-
Hydroxy-2-ethyloctanoic acid, 2-hydroxy-
2-propyloctanoic acid, 2-hydroxy-2-butyloctanoic acid,

2-hydroxy-2-pentyloctanoic acid, 2-hydroxy-2-hexyloctanoic acid, 2-hydroxy-2-heptyloctanoic acid, 3-hydroxypropanoic acid, 3-hydroxybutanoic acid, 3-hydroxypentanoic acid , 3-hydroxyhexanoic acid, 3-hydroxyheptanoic acid, 3-hydroxyoctanoic acid, 3-hydroxy-3-methylbutanoic acid, 3-hydroxy-3-methylpentanoic acid, 3-hydroxy-3-ethylpentanoic acid,
3-hydroxy-3-methylhexanoic acid, 3-hydroxy-3-ethylhexanoic acid, 3-hydroxy-3-propylhexanoic acid, 3-hydroxy-3-methylheptanoic acid, 3-hydroxy-3-ethylheptanoic acid, 3-hydroxy-3-propylheptanoic acid, 3-hydroxy-3
-Butylheptanoic acid, 3-hydroxy-3-methyloctanoic acid, 3-hydroxy-3-ethyloctanoic acid, 3-
Hydroxy-3-propyloctanoic acid, 3-hydroxy-3-butyloctanoic acid, 3-hydroxy-3-pentyloctanoic acid, 4-hydroxybutanoic acid,

4-hydroxypentanoic acid, 4-hydroxyhexanoic acid, 4-hydroxyheptanoic acid, 4-hydroxyoctanoic acid, 4-hydroxy-4-methylpentanoic acid, 4-hydroxy-4-methylhexanoic acid, 4-hydroxy -4-ethylhexanoic acid, 4-hydroxy-4-
Methylheptanoic acid, 4-hydroxy-4-ethylheptanoic acid, 4-hydroxy-4-propylheptanoic acid, 4-
Hydroxy-4-methyloctanoic acid, 4-hydroxy-
4-ethyloctanoic acid, 4-hydroxy-4-propyloctanoic acid, 4-hydroxy-4-butyloctanoic acid,
5-hydroxypentanoic acid, 5-hydroxyhexanoic acid, 5-hydroxyheptanoic acid, 5-hydroxyoctanoic acid, 5-hydroxy-5-methylhexanoic acid, 5-hydroxy-5-methylheptanoic acid, 5-hydroxy-5
-Ethylheptanoic acid, 5-hydroxy-5-methyloctanoic acid, 5-hydroxy-5-ethyloctanoic acid, 5-
Hydroxy-5-propyloctanoic acid, 6-hydroxyhexanoic acid, 6-hydroxyheptanoic acid, 6-hydroxyoctanoic acid, 6-hydroxy-6-methylheptanoic acid, 6-hydroxy-6-methyloctanoic acid, 6-hydroxy- 6-ethyloctanoic acid, 7-hydroxyheptanoic acid, 7-hydroxyoctanoic acid, 7-hydroxy-7
-Methyloctanoic acid, or aliphatic hydroxycarboxylic acids such as 8-hydroxyoctanoic acid and oligomers derived therefrom.

Examples of the catalyst for producing the hydroxycarboxylic acid type aliphatic polyester resin include tin, antimony, zinc, titanium, iron and aluminum compounds, among which tin type catalysts and aluminum type catalysts are preferable. Tin octylate and aluminum acetylacetonate are particularly suitable. Among the above hydroxycarboxylic acid-based aliphatic polyester resins, poly L-lactic acid obtained by lactide ring-opening polymerization is particularly preferable because it is confirmed to be hydrolyzed to L-lactic acid and its safety is also confirmed. The hydroxycarboxylic acid type aliphatic polyester resin used in the present invention is not limited to this, and therefore the lactide used for its production is
It is not limited to the body.

A compound capable of reacting with active hydrogen in the plastic may be added to the biodegradable plastic, preferably the biodegradable polyester, used in the present invention. By mixing the compound, the amount of active hydrogen in the biodegradable plastic is reduced, and the active hydrogen is suppressed from catalytically hydrolyzing the main chain, which has the advantage of further improving long-term reliability. is there. Here, active hydrogen is C-H.
It is hydrogen in a bond such as O—H or N—H, which has higher reactivity than hydrogen in the bond, and for example, carboxyl group: —COOH, hydroxyl group: —OH, amino group: —N.
H ₂ or amide bond: hydrogen in —NHCO— and the like. The compound capable of reacting with active hydrogen according to the present invention is not particularly limited as long as it can react with the active hydrogen, and for example, a carbodiimide compound, an isocyanate compound, an oxazoline compound or the like can be applied. In particular, the carbodiimide compound can be melt-kneaded with the polyester, and the hydrolyzability can be adjusted by adding a small amount, which is preferable. In addition, these compounds capable of reacting with active hydrogen may be used alone or in combination of two or more.

The carbodiimide compound is a cross-linking agent having a carbodiimide group, and is a compound (including a polycarbodiimide compound) having one or more carbodiimide bonds: -N = C = N- in the molecule. As the production method thereof, for example, an organic phosphorus compound (O, O-dimethyl-O- (3-methyl-4-nitrophenyl) phosphorothioate, O, O-dimethyl-O- (3-methyl-4-) as a catalyst is used. (Methylthio) phenyl) phosphorothioate,
O, O-diethyl-O-2-isopropyl-6-methylpyrimidin-4-yl phosphorothioate etc.) or an organometallic compound (rhodium complex, titanium complex, tungsten complex, palladium complex etc.) and various polyisocyanates of about 70 A method of synthesizing by subjecting to a decarboxylation condensation reaction in a solvent-free or inert solvent (hexane, benzene, dioxane, chloroform, etc.) at a temperature of about ° C or higher can be mentioned.

Examples of the monocarbodiimide compound contained in the carbodiimide compound include dicyclohexylcarbodiimide, diisopropylcarbodiimide, dimethylcarbodiimide, diisobutylcarbodiimide, dioctylcarbodiimide, t-butylisopropylcarbodiimide, diphenylcarbodiimide, di-t-butylcarbodiimide, or di-β. Examples thereof include naphthylcarbodiimide, and among these, dicyclohexylcarbodiimide or diisopropylcarbodiimide is particularly preferable in terms of industrial availability.

Examples of the polyisocyanate compound include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, 4,4'-diphenylmethane diisocyanate and 2,4'-diphenylmethane. Diisocyanate, 2,2'-diphenylmethane diisocyanate, 3,3'-dimethyl-4,4'-biphenylene diisocyanate, 3,3'-dimethoxy-
4,4'-biphenylene diisocyanate, 3,3'-
Dichloro-4,4'-biphenylene diisocyanate,
1,5-naphthalene diisocyanate, 1,5-tetrahydronaphthalene diisocyanate, tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, dodecamethylene diisocyanate, trimethylhexamethylene diisocyanate, 1,3-cyclohexylene diisocyanate, 1,4-cyclohexylene Diisocyanate, xylylene diisocyanate, tetramethyl xylylene diisocyanate, hydrogenated xylylene diisocyanate, lysine diisocyanate, isophorone diisocyanate, 4,4'-dicyclohexylmethane diisocyanate or 3,3'-dimethyl-4,
4'-dicyclohexyl methane diisocyanate etc. are mentioned. In the present invention, a commercially available polyisocyanate compound may be used, for example, an aromatic isocyanate adduct such as coronate (manufactured by Nippon Polyurethane; hydrogenated diphenylmethane diisocyanate) or mylionate (manufactured by Nippon Polyurethane) is applicable, but melted. In the case of blending, it is a solid rather than a liquid, for example, a masking agent for isocyanate groups (polyhydric aliphatic alcohol, aromatic polyol, etc.)
The use of polyisocyanate compounds blocked with is preferred.

Examples of the oxazoline compound include:
2,2'-o-phenylene bis (2-oxazoline),
2,2'-m-phenylene bis (2-oxazoline),
2,2'-p-phenylene bis (2-oxazoline),
2,2'-p-phenylenebis (4-methyl-2-oxazoline), 2,2'-m-phenylenebis (4-methyl-2-oxazoline), 2,2'-p-phenylenebis (4, 4'-dimethyl-2-oxazoline), 2,
2'-m-phenylene bis (4,4'-dimethyl-2-
Oxazoline), 2,2'-ethylenebis (2-oxazoline), 2,2'-tetramethylenebis (2-oxazoline), 2,2'-hexamethylenebis (2-oxazoline), 2,2'-octa Methylenebis (2-oxazoline), 2,2'-ethylenebis (4-methyl-2-)
Oxazoline), or 2,2′-diphenylenebis (2-oxazoline).

The amount of the compound capable of reacting with active hydrogen as described above is preferably about 0.1 to 5% by weight of the biodegradable plastic. However, the long-term reliability of the biodegradable plastic material containing a compound capable of reacting with active hydrogen and the biodegradation rate after use can be adjusted by the type and amount of the compound capable of reacting with the active hydrogen. The type and amount of the compound capable of reacting with the active hydrogen to be mixed may be determined according to the intended product.

As the plant-growth promoting inorganic substance used in the present invention, those containing an inorganic compound containing nitrogen, phosphorus and potassium as constituent elements are particularly preferable. These inorganic compounds include monoammonium phosphate, diammonium phosphate, triammonium phosphate, sodium hydrogen phosphate, ammonium dihydrogen phosphate, ammonium carbonate, ammonium bicarbonate, ammonium hydrogen carbonate, ammonium hydrogen sulfate, ammonium hydrogen sulfite, ammonium sulfate, Ammonium salts such as ammonium nitrate and ammonium chloride, nitrates such as calcium nitrate, sodium nitrate, potassium nitrate, magnesium nitrate, aluminum phosphate, monopotassium phosphate, calcium monohydrogen phosphate, monosodium phosphate, tripotassium phosphate, tricalcium phosphate, and phosphoric acid Trisodium, trimagnesium phosphate, calcium hydrogen phosphate, sodium hydrogen phosphate, dipotassium hydrogen phosphate, disodium hydrogen phosphate, dipotassium phosphate, potassium dihydrogen phosphate Dihydrogen phosphate calcium, sodium dihydrogen phosphate, disodium phosphate, magnesium phosphate, tetracalcium phosphate compounds such as; potassium bicarbonate, potassium carbonate,
Potassium chloride, potassium diphosphate, potassium disulfate, potassium hydrogen carbonate, potassium metaphosphate, potassium pyrophosphate,
Examples thereof include potassium compounds such as potassium pyrosulfate, sodium potassium carbonate, potassium sulfate, and potassium sulfite. These plant growth promoting inorganic substances may be used alone or in combination of two or more.

Further, these plant growth promoting inorganic substances are preferably mixed and dispersed as solid particles in a naturally disintegrating resin typified by the biodegradable polymer. The average particle size of the solid particles is about 0.005 to 1000 μm, preferably about 0.01 to 100 μm. The content of the solid particles mixed and dispersed in the naturally disintegrating resin is about 0.01 to 20% by weight based on the resin,
Preferably, it is about 0.05 to 10% by weight.

The solid particles of the plant growth promoting inorganic material are
When mixed and dispersed in the resin, surface treatment is preferably performed to improve dispersibility. A surfactant as a dispersant can be used for this surface treatment.
As these surfactants, anionic surfactants, cationic surfactants, nonionic surfactants, and zwitterionic surfactants can be used appropriately. As the anionic surfactant, a fatty acid salt, a higher alcohol sulfate ester salt, a liquid fatty acid sulfate ester salt, a sulfate salt of an aliphatic amine or an aliphatic amide, a fatty alcohol phosphate ester salt, and a sulfone salt of a dibasic fatty acid ester. , Fatty acid amide sulfonate, formalin condensation naphthalene sulfonate, and the like. Examples of cationic surfactants include aliphatic amine salts, quaternary ammonium salts, and alkylpyridinium salts. Examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene alkylphenol ether, polyoxyethylene alkyl ester, sorbitan alkyl ester, polyoxyethylene sorbitan alkyl ester and the like.

In the member according to the present invention, the above natural disintegrating resin may be mixed and dispersed with an additive other than the above-mentioned plant growth promoting inorganic substance. As the other additive, for example, a reinforcing material, an inorganic or organic filler,
In addition to antioxidants, heat stabilizers, ultraviolet absorbers, etc., lubricants, waxes, colorants, crystallization accelerators, degradable organic substances such as starch, and the like can be mentioned. These may be used alone, A plurality of combinations may be used. Examples of the reinforcing material include glass microbeads, carbon fibers, chalk, quartz such as novoculite, asbestos, feldspar, mica, talc, silicates such as wollastonite, kaolin and the like.
Examples of the inorganic filler include fine particles of carbon oxide such as carbon, silicon dioxide, alumina, silica, magnesia, and ferrite; silicates such as talc, mica, kaolin, and zeolite; barium sulfate, calcium carbonate, or fullerene. As the organic filler, for example, epoxy resin, melamine resin, urea resin, acrylic resin, phenol resin, polyimide resin, polyamide resin, polyester resin, or Teflon (registered trademark) resin can be used. Above all,
Carbon and silicon dioxide are preferred. The fillers may be used alone or in combination of two or more. The function of the filler is not particularly limited, but, for example, an inorganic filler may be used as the reinforcing material. Moreover, silicates as inorganic fillers function as flame retardants. As silicates suitable as such an inorganic filler, silicates having a silicon dioxide content of about 50% or more are more preferable. This is because the silicates are extracted from naturally occurring minerals, so substances other than silicates (eg MgO, CaO, Fe ₂ O ₃ , Al ₂ O ₃ etc.) are contained to some extent. . However, it is preferable that the effect of the inorganic filler for flame retardancy is not hindered by impurities. Further, the content of the inorganic filler may be appropriately selected according to its type, and cannot be generally stated. For example, when the inorganic filler is a silicate, its content is
It is preferably about 5 to 30% by weight based on the entire biodegradable plastic material according to the present invention.

Examples of the antioxidant include phenol type, amine type, phosphorus type, sulfur type, hydroquinone type,
Alternatively, quinoline-based antioxidants and the like can be mentioned. Phenolic antioxidants include hindered phenols such as 2,6-di-t-butyl-p-cresol, 1,
3,5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene,
2,2'-methylenebis (4-methyl-6-t-butylphenol), 4,4'-methylenebis (2,6-di-
t-butylphenol), 4,4'-butylidenebis (3-methyl-6-t-butylphenol), 1,6-
C such as hexanediol-bis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate]
_2-10 alkylenediol-bis [3- (3,5-di-branched _C3-6 alkyl-4-hydroxyphenyl) propionate]; for example triethylene glycol-bis [3-
(3-t-butyl-5-methyl-4-hydroxyphenyl) propionate] and other di- or trioxy C _2-4 alkylenediol-bis [3- (3,5-di-branched C _3-
6 alkyl-4-hydroxyphenyl) propionate]; for example glycerin tris [3- (3,5-di-t
-Butyl-4-hydroxyphenyl) propionate]
C _3-8 alkanetriol-bis [3- (3,5-
Di-branched C _3-6 alkyl-4-hydroxyphenyl) propionate]; for example, C _4-8 alkanetetra, such as pentaerythritol tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] All tetrakis [3- (3,5-di - branched C _3-6 alkyl-4-hydroxyphenyl) propionate]; for example n- octadecyl-3- (4 ', 5'-di -t- butylphenol) propionate, n -Octadecyl-3
-(4'-hydroxy-3 ', 5'-di-t-butylphenol) propionate, stearyl-2- (3,5
-Di-t-butyl-4-hydroxyphenol) propionate, distearyl-3,5-di-t-butyl-4
-Hydroxybenzylphosphonate, 2-t-butyl-
6- (3-t-butyl-5-methyl-2-hydroxybenzyl) -4-methylphenyl acrylate, N, N '
-Hexamethylenebis (3,5-di-t-butyl-4-
Hydroxy-hydrocinnamide), 3,9-bis {2-
[3- (3-t-Butyl-4-hydroxy-5-methylphenyl) propionyloxy] -1,1-dimethylethyl} -2,4,8,10-tetraoxaspiro [5.
5] Undecane, 4,4′-thiobis (3-methyl-6)
-T-butylphenol), or 1,1,3-tris (2-methyl-4-hydroxy-5-t-butylphenol) butane.

Examples of the amine-based antioxidant include phenyl-1-naphthylamine, phenyl-2-naphthylamine, N, N'-diphenyl-1,4-phenylenediamine, or N-phenyl-N'-cyclohexyl-.
1,4-phenylenediamine and the like can be mentioned. Examples of phosphorus-based antioxidants include triisodecyl phosphite, triphenyl phosphite, trisnonylphenyl phosphite, diphenyl isodecyl phosphite, phenyl diisodecyl phosphite, 2,2-methylenebis (4,6-di- t-butylphenyl) octyl phosphite, 4,4'-butylidene bis (3-methyl-6-
t-butylphenyl) ditridecyl phosphite, tris (2,4-di-t-butylphenyl) phosphite,
Tris (2-t-butyl-4-methylphenyl) phosphite, tris (2,4-di-t-amylphenyl) phosphite, tris (2-t-butylphenyl) phosphite, bis (2-t-) Butylphenyl) phenylphosphite, tris [2- (1,1-dimethylpropyl)
-Phenyl] phosphite, tris [2,4- (1,1
Phosphite compounds such as -dimethylpropyl) -phenyl] phosphite, tris (2-cyclohexylphenyl) phosphite, tris (2-t-butyl-4-phenylphenyl) phosphite; triethylphosphine,
Tripropylphosphine, tributylphosphine, tricyclohexylphosphine, diphenylvinylphosphine, allyldiphenylphosphine, triphenylphosphine, methylphenyl-p-anisylphosphine, p-
Anisyldiphenylphosphine, p-tolyldiphenylphosphine, di-p-anisylphenylphosphine, di-p-tolylphenylphosphine, tri-m-aminophenylphosphine, tri-2,4-dimethylphenylphosphine, tri-2, 4,6-trimethylphenylphosphine, tri-o-tolylphosphine, tri-m-tolylphosphine, tri-p-tolylphosphine, tri-o
—Anisylphosphine, tri-p-anisylphosphine, phosphine compounds such as 1,4-bis (diphenylphosphino) butane, and the like.

Examples of the hydroquinone antioxidant include 2,5-di-t-butylhydroquinone and the like, and examples of the quinoline antioxidant include 6-ethoxy-2,2,4-trimethyl-. 1,2-dihydroquinoline and the like, and examples of the sulfur-based antioxidant include dilaurylthiodipropionate and distearylthiodipropionate. Among them, preferred antioxidants include phenolic antioxidants (particularly,
Hindered phenols), for example, polyol-poly [(branched _C3-6 alkyl group and hydroxy group-substituted phenyl) propionate] and the like. The antioxidants may be used alone or in combination of two or more.

Examples of the heat stabilizer include nitrogen-containing compounds (basic nitrogen-containing compounds such as polyamide, poly-β-alanine copolymer, polyacrylamide, polyurethane, melamine, cyanoguanidine, and melamine-formaldehyde condensate). , Alkali or alkaline earth metal-containing compounds [in particular, organic carboxylic acid metal salts (calcium stearate, 12-hydroxy calcium stearate, etc.), metal oxides (magnesium oxide, calcium oxide, aluminum oxide, etc.), metal hydroxides (water Magnesium oxide, calcium hydroxide, aluminum hydroxide, etc.), metal carbonates, etc.], zeolite, hydrotalcite, etc. In particular, an alkali or alkaline earth metal-containing compound (particularly an alkaline earth metal-containing compound such as a magnesium compound or a calcium compound), zeolite, or hydrotalcite is preferable. The heat stabilizers may be used alone or in combination of two or more.

Examples of the ultraviolet absorber include conventionally known benzophenone type, benzotriazole type, cyanoacrylate type, salicylate type and oxalic acid anilide type. For example, [2-hydroxy-4- (methacryloyloxyethoxy) benzophenone] -methyl methacrylate copolymer, [2-hydroxy-4- (methacryloyloxymethoxy) benzophenone] -methyl methacrylate copolymer, [2-hydroxy -4- (methacryloyloxyoctoxy) benzophenone] -methyl methacrylate copolymer, [2-hydroxy-4- (methacryloyloxidedecyloxy) benzophenone]-
Methyl methacrylate copolymer, [2-hydroxy-4-
(Methacryloyloxybenzyloxy) benzophenone] -methyl methacrylate copolymer, [2,2′-dihydroxy-4- (methacryloyloxyethoxy) benzophenone] -methyl methacrylate copolymer, [2,2
2'-dihydroxy-4- (methacryloyloxymethoxy) benzophenone] -methyl methacrylate copolymer, [2,2'-dihydroxy-4- (methacryloyloxyoctoxybenzophenone) -methyl methacrylate copolymer and the like can be mentioned. To be The ultraviolet absorber may be used alone or in combination of two or more.

Examples of the lubricant include petroleum-based lubricating oils such as liquid paraffin; synthetic lubricating oils such as halogenated hydrocarbons, diester oils, silicone oils and fluorosilicones; various modified silicone oils (epoxy modified, amino modified, alkyl). Modified, polyether modified, etc.); silicon-based lubricating substances such as copolymers of organic compounds such as polyoxyalkylene glycol and silicon; silicone copolymers; various fluorosurfactants such as fluoroalkyl compounds; trifluoro Fluorine-based lubricating substances such as low-polymerized methylene chloride; higher aliphatic alcohols; higher aliphatic amides; higher fatty acid esters; higher fatty acid salts; or molybdenum disulfide. Among these, it is particularly preferable to use a silicon copolymer. As the silicone copolymer, acrylic resin, polystyrene resin, polynitrile resin, polyamide resin, polyolefin resin, epoxy resin,
It is more preferable to use a resin such as polybutyral-based resin, melamine-based resin, vinyl chloride-based resin, polyurethane-based resin or polyvinyl ether-based resin in which silicon is block- or graft-polymerized. 1 of these lubricants
One type may be used alone, or two or more types may be used in combination.

Examples of the waxes include olefin wax such as polypropylene wax or polyethylene wax, paraffin wax, Fischer-Tropsch wax, microcrystalline wax, montan wax, fatty acid amide wax, higher aliphatic alcohol wax, and higher wax. Fatty acid wax,
Examples thereof include fatty acid ester wax, carnauba wax, rice wax and the like. The function of waxes is not particularly limited, but may be used as the above-mentioned lubricant, for example. These waxes may be used alone or in combination of two or more. Examples of the colorant include inorganic pigments, organic pigments and dyes. Examples of the inorganic pigment include chrome pigments, cadmium pigments, iron pigments, cobalt pigments, ultramarine blue, and dark blue. Specific examples of organic pigments and dyes include, for example, carbon black; phthalocyanine pigments such as phthalocyanine copper; quinacridone pigments such as quinacridone magenta and quinacridone red; hansa yellow, disazo yellow, and the like.
Examples thereof include azo pigments such as permanent yellow, permanent red, and naphthol red; for example, spirit black SB, nigrosine base, nigrosine dye such as oil black BW, oil blue, and alkali blue. The colorants may be used alone or in combination of two or more.

Examples of the crystallization accelerator include p-
sodium t-butylbenzoate, sodium montanate, calcium montanate, sodium palmitate,
Organic acid salts such as calcium stearate; inorganic salts such as calcium carbonate, calcium silicate, magnesium silicate, calcium sulfate, barium sulfate, and talc; metal oxides such as zinc oxide, magnesium oxide, and titanium oxide. These crystallization accelerators may be used alone or in combination of two or more.

The member according to the present invention can be easily manufactured according to a known method, and examples thereof include the following manufacturing methods. First, in the above-mentioned naturally disintegrating resin,
The above-mentioned plant growth promoting inorganic substance and, if desired, the above-mentioned other additives are mixed and dispersed. The method of mixing and dispersing is not particularly limited, and a known method may be used. For example, the self-disintegrating resin described above and the resin or polymer compound as an additive (hereinafter referred to as “resin component” in this column) are melted, and other components including the plant growth promoting inorganic substance (in this section, “ A method of adding "a non-resin component") to the melt. After the addition, stirring may be performed by a known method. The order of addition is not particularly limited, and two or more kinds of non-resin components may be added simultaneously, or one kind may be added one by one. Further, a non-resin component may be added before or at the time of melting the above-mentioned resin component. Further, a part of the non-resin component may be added before or during the melting of the resin component, and the remaining non-resin component may be added after the melting of the resin. That is, the addition timing is not limited as long as the non-resin component is contained in the resin component.

Then, the member according to the present invention can be manufactured by molding the obtained resin material. Examples of the molding method include film molding, extrusion molding, and injection molding. Among them, injection molding is particularly preferable. Extrusion molding or injection molding is carried out according to a conventional method, for example, an extruder such as a single-screw extruder, a multi-screw extruder or a tandem extruder, which is known per se,
Alternatively, it can be performed with an injection molding machine such as an in-line screw injection molding machine, a multi-layer injection molding machine, or a double-headed injection molding machine, and can be molded into a desired shape.

The shape and structure of the member according to the present invention are not particularly limited, but it is preferable that the member is a component of electronic equipment. More specifically, the member according to the present invention is, for example, a radio, earphone, headphone, microphone, T
It can be used as a housing for electric products such as V, keyboard, portable music player, mobile phone, personal digital assistant, and personal computer. The member of the present invention is particularly preferably used as a member that can be replaced in the electric product without impairing the function of the electric device. Above all, the member according to the present invention is more preferably used as a decorative external housing member that is used by being attached to a portable electric device. Here, examples of the decorative outer casing member include a member for simply changing the appearance such as color while keeping the function of the electric device as it is, and the user himself or herself after purchasing it according to his or her preference. A member that can be replaced with or already mounted on a member already mounted is more preferable.

In the member according to the present invention, it is preferable that the composition ratio of the naturally disintegrating resin in which the plant growth promoting inorganic substance is mixed and dispersed is high. Specifically, the weight ratio of the naturally disintegrating resin to the total weight of the member is about 50% or more, preferably 90% or more, more preferably about 100%.
%, And it is preferable that the residue is extremely small when buried in soil. In addition, for urban dwellers, the amount of personal free soil is small, such as in flowerpots, and in view of these, it is desirable that the member according to the present invention be small. However, the present invention can be applied to a relatively large electric device. For example, it is known that only the external housing member is renewed and used as a new appearance by so-called refurbishment, but it is also preferable to apply the electric product or member according to the present invention to them. .

Since the member according to the present invention has a natural disintegrating property, it can be decomposed by burying it in soil after use. Further, since the member according to the present invention contains a plant growth promoting inorganic substance, burying the recovered member in an cultivated land, a forest or the like contributes to improvement of plant growth promoting property and soil fertility.

[0050]

EXAMPLES Here, a cover panel of a mobile phone was actually manufactured as a member according to the present invention and evaluated, but the present invention is not limited to this. [Example 1] Polylactic acid (trade name: Lacia H100J,
To 100 parts by weight of Mitsui Chemicals, 5 parts by weight of calcium phosphate having a particle diameter of about 10 to 30 μm and 0.1 part by weight of the red iron oxide coloring agent were added as inorganic substances for promoting plant growth. This was kneaded at a kneading temperature of 185 ° C. for 5 minutes. Then, it was molded into a red cover panel (so-called dress-up panel) of a plate-shaped mobile phone having a thickness of 0.2 mm. This panel was embedded in a flowerpot of an ornamental plant containing a Kanto loam layer collected in Yokohama City. After a year, it was observed that the panel did not retain its morphology and that the calcium phosphate had also dispersed and diffused into the soil.

Example 2 The knowledge of Example 1 was obtained by replacing calcium phosphate of Example 1 with potassium sulfate and performing the same procedure as in Example 1.

Example 3 100 parts by weight of the polylactic acid of Example 1 was dissolved in 2000 parts by weight of chloroform and surface-treated with 5% by weight of oleic acid as a plant-growth-promoting inorganic substance, and the particle size was about 10 to 30 μm. 5 parts by weight of potassium nitrate was added, and 0.1 part by weight of the coloring agent yellow iron oxide was added. The mixture was uniformly dispersed and dried to form a 0.2 mm-thick plate-shaped mobile phone yellow cover panel (so-called dress-up panel). Similar to Example 1, this panel was embedded in a flowerpot of an ornamental plant containing the Kanto loam layer collected in Yokohama City. After one year, it was observed that the panel remained morphological and that the calcium nitrate had also diffused and disappeared into the soil.

[0053]

INDUSTRIAL APPLICABILITY The present invention provides an electric device using a member having an effect of promoting plant growth. Specifically, it is a natural disintegrating property mainly composed of a biodegradable plastic material capable of ensuring long-term reliability. Provided is an electric device using a member containing a resin containing a plant growth promoting inorganic substance. And after use,
The volume of the waste can be reduced by burying the member according to the present invention in the soil containing the microorganisms to decompose and eliminate the member. At the same time, since the member and the electric appliance according to the present invention contain the plant growth promoting inorganic substance, the plant growth promoting property and soil strength of the soil can be improved.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Haruo Watanabe             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation F-term (reference) 4D004 AA07 AA22 CA17                 4J002 AB011 AB041 AB051 AD011                       AD021 CF181 CL011 DE226                       DF006 DF036 DG046 DH026                       DH046 FB086 FB236 FB246                       FB266 FD010 FD016 FD050                       FD060 FD070 FD090 FD170                       FD206 GQ00                 4J200 AA02 BA05 BA07 BA13 BA14                       BA15 BA18 BA20 BA25 BA29                       BA30 BA37 BA38 BA39 DA28                       EA23

Claims (19)

[Claims] 1. An electric device comprising a member in which a plant growth promoting inorganic substance is mixed and dispersed in a naturally disintegrating resin. 2. The electric device according to claim 1, wherein the naturally disintegrating resin is a biodegradable plastic. 3. The electric device according to claim 2, wherein the biodegradable plastic is biodegradable polyester. 4. The electric device according to claim 3, wherein the biodegradable polyester is polylactic acid. 5. The plant growth promoting inorganic substance contains an inorganic compound having one or more elements selected from the group consisting of nitrogen, phosphorus and potassium as a constituent element. Electrical equipment. 6. The electric device according to claim 1, wherein the plant growth promoting inorganic material is solid particles. 7. The electric device according to claim 6, wherein the solid particles are surface-treated. 8. The electric device according to claim 6, wherein the solid particles are surface-treated with a surfactant. 9. The electric device according to claim 1, wherein the member is replaceable without impairing the function of the electric device. 10. A member in which a plant-growth promoting inorganic substance is mixed and dispersed in a naturally disintegrating resin. 11. The member according to claim 10, wherein the naturally disintegrating resin is a biodegradable plastic. 12. The member according to claim 11, wherein the biodegradable plastic is biodegradable polyester. 13. The member according to claim 12, wherein the biodegradable polyester is polylactic acid. 14. The plant growth promoting inorganic material according to claim 10, wherein the inorganic material contains an inorganic compound having one or more elements selected from the group consisting of nitrogen, phosphorus and potassium as constituent elements. Element. 15. The member according to claim 10, wherein the plant growth promoting inorganic material is solid particles. 16. The member according to claim 15, wherein the solid particles are surface-treated. 17. The member according to claim 15, wherein the solid particles are surface-treated with a surfactant. 18. The member according to claim 10, which is a component of an electric device and is replaceable without impairing the function of the electric device. 19. A method for decomposing a member for an electric device, which comprises burying the member in which a plant-growth-promoting inorganic substance is mixed and dispersed in a naturally disintegrating resin in soil after use.