JPH0977902A - Undiluted volume reducing solution composition for polystyrene foam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a undiluted volume reducing solution composition for polystyrene foams by mixing an undiluted d-limonene solution with a specified surfactant and optionally specified adjuvants. SOLUTION: This undiluted volume reducing solution composition for polystyrene foams comprises 50-99 pts.wt. concentrated d-limonene solution, 0.0-30.0 pts.wt. surfactant having an HLB or an additive HLB of 6.0-30.0 and optionally 0.0-5.0 pts.wt. emulsion stabilizer and/or an adjuvant for preventing chapped skin and optionally 30 pts.wt. or below animal or vegetable oil. The surfactants desirably include linear alkylbenzenesulfonates, polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, alkyl ethers of ethylene oxide/propylene oxide mixed condensates, polyoxyethylene alkyl ether sulfonates, polyoxyethylene alkyl ether sulfonates and carboxylates.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stock solution composition (hereinafter, also referred to as a stock solution undiluted solution) for a volume-reducing solution used when reducing the volume of expanded polystyrene (expanded polystyrene), and particularly to packaging. The main component is d-limonene, which quickly dissolves bulky expanded polystyrene molded products that have become unnecessary after being used as materials, beverage containers, etc. and has high biodegradability for safety during handling and environmental protection. The present invention relates to a concentrated solution concentrate solution of expanded polystyrene.

[0002]

2. Description of the Prior Art Molded products of expanded polystyrene make various instants by taking advantage of the ease of molding, shape retention, lightness, good touch, heat insulation, shock absorption, corrosion resistance, whiteness, etc. It is produced and consumed in large quantities as a container for storing, transporting, displaying, and cooking foods, fresh seafood, vegetables, fruits, etc., and as a packaging material for home appliances. These used expanded polystyrene molded products have been conventionally disposed of as wastes by various methods.

[0003] These used expanded polystyrene wastes (hereinafter also referred to as wastes) are not thoroughly separated and recovered after use, and even if they are separated and recovered, many techniques for treating them are used. There's a problem. For example, in the case of landfill treatment, the shape retention, light weight, shock buffering property, corrosion resistance, hue, etc. are damaged, they do not corrode naturally, they float up on earth and sand by rainwater and are scattered, and air further Floating inside,
Today it is a social issue. For example, in the case of a so-called toro box used for storing and transporting fresh seafood, the number of empty toro boxes is about 880, although the limit is about 880 even if they are arranged and loaded on a 4-ton truck. Has a total weight of only 1
The weight is only 4.75 kg, which is not much different from the weight of about 12.5 kg of sheets and ropes required for covering and fixing about 880 toro boxes. It is no exaggeration to say that transporting boxes is almost done in the effort of transporting air.
Further, a method of incinerating, a method of thermally decomposing, a method of compressing and crushing by applying high pressure, a method of melting, and the like have been proposed.

[0004] Of course, these methods are carried out by combining the above-mentioned processing techniques and adding an additional processing technique, and the waste is finally used as a heat source, a fuel or a recycled plastic. On the other hand, since these wastes are lightweight and have a very large volume, they are very difficult to handle during transportation or disposal. Therefore, in the disposal process, it is particularly desired to destroy the foam part from the waste to reduce the volume.

In the method of incineration, a large amount of black smoke, fine carbon particles, malodor, or carbon monoxide is generated due to incomplete combustion when the amount of air fed is insufficient. It is well known that high heat is generated and the life of the incinerator is shortened because the amount of air is usually incinerated with an excessive amount of air for complete combustion. On the other hand, when waste is pyrolyzed,
A large amount of high temperature and harmful gas is generated. Therefore, in both cases of incineration treatment and thermal decomposition treatment, it is necessary to reliably shut off the outside air so that combustion gas and thermal decomposition gas do not leak outside. Especially, since the waste is bulky and it is necessary to process the waste frequently, a special sealing mechanism must be adopted for the inlet.

For example, in Japanese Unexamined Patent Publication No. S50-84672, a waste material is mixed and dissolved in a pyrolysis oil at room temperature, and then thermally decomposed, and the generated gas is cooled and oiled to obtain a pyrolysis oil. Is listed. However, in this technique, the device is large and complicated, so that it cannot be easily implemented anytime and anywhere.

The method of compressing by applying a high pressure requires a means for generating a high pressure and has a limited volume reduction rate, and thus the volume-reduced polystyrene is generally colored by heat, In addition, since it contains decomposed products, it tends to be difficult to reuse it as plastic. Further, the melting method has a problem in that it is dangerous to work and a foul odor is generated because the method is performed at a high temperature.

On the other hand, as a method for dissolving wastes in a solvent to reduce the volume, a solvent having a high affinity with expanded polystyrene and swelling or dissolving it well is used. In this case, if the heating operation is also used, the volume can be reduced more effectively. Further, the dissolved liquid can be used as it is as a raw material of the liquid fuel.

In Japanese Patent Laid-Open No. 3-115334, the waste is dissolved in a solvent, the resulting solution is heated and concentrated, and then the waste component and the solvent are separated from the concentrated solution and further adsorbed. It is described that the solvent is recovered by the method to reduce the volume of the waste, and in JP-A-53-19386, the waste is treated with a chlorinated hydrocarbon solvent, in particular, an alkaline stabilizer is added. It is dissolved in chlorethylene, and the solution is concentrated or dried under heating and / or reduced pressure,
It is described that the solvent is recovered and the waste components are concentrated or solidified to reduce the volume of the waste. In JP-A-6-63530, the waste is transferred by a belt conveyor. , 110 ℃ ~ 180 in the middle of this transfer process
It is described that the vegetable oil heated to ℃ is sprinkled to reduce the volume, and in JP-A-6-256704, the waste is toluene, methyl cellosolve, isobutyl acetate,
It is described that the volume is reduced by dissolving it in a mixed solvent of butyl acetate, and JP-A-50-144780 discloses that the foamed portion in the waste is broken and softened by spraying gasoline on the waste. A water-soluble polystyrene having a water solubility of 70 to 80% is obtained by coagulating a hydrated starch syrup-like polystyrene with a metal hydroxide (hydrate of gold, chromium, iron, tin, etc.) or an aqueous solution of berlinate having a small solubility product with zinc sulfate. It is described that an aqueous emulsion of waste is produced by kneading with a gelled wastewater treatment sludge.

In Japanese Unexamined Patent Publication No. 5-138146, wastes are treated with various oils such as beef tallow at a temperature of 100 ° C. or lower.
Animal oil such as lard, fish oil, soybean oil, rapeseed oil, castor oil, olive oil, vegetable oil such as cottonseed oil, petroleum, machine oil, spindle oil, mineral oil such as benzine, naphtha, etc., or aromatic series having benzene ring, naphthalene ring, etc. A solvent such as chlorobenzene, benzyl chloride, styrene monomer, etc., is prepared as an O / W emulsion,
It is described that the waste is immersed in this, and if necessary, it is compressed by mechanical force to break the air contained in the waste to reduce the volume of the waste. There is. Further, in this technique, when it is safe to obtain flexible polythrene after volume reduction, benzoic acid ester, phthalic acid ester, terephthalic acid ester, isophthalic acid ester, biphenyl dicarboxylic acid ester, trimellitic acid ester, etc. Ester, pyromellitic acid ester, naphthalenecarboxylic acid ester, naphthalene dicarboxylic acid ester, cyclohexanecarboxylic acid ester, cyclohexanedicarboxylic acid ester, phosphoric acid ester, fatty acid ester, adipic acid ester, oxyacid ester, chlorinated paraffin, chlorinated biphenyl compound It is said that plasticizers such as alkylnaphthalene and show brain can be used alone or in combination with the above various oils.

However, the method of reducing the volume using such a solvent is also prone to the problems of high solvent price and safety problems such as flammability and toxicity of the handling solvent. Therefore, the solvent for reducing the volume of waste is
It is necessary to be able to avoid such problems. Here, it is not necessary in some cases to completely dissolve the waste in order to remove the polystyrene from the solubilizer.
Solid-liquid separation is generally easier to operate than liquid-liquid separation.

In Japanese Unexamined Patent Publication (Kokai) No. 57-1479, wastes are treated as methylene chloride, ethylene chloride, trichloroethylene, cyclohexane, a mixed solution of cyclohexane and acetone, methylcyclohexane, a mixed solution of methylcyclohexane and acetone, benzene, Swell and dissolve with a solvent such as toluene, ethylbenzene, and tetrahydrofuran to destroy bubbles, and use the resulting mud-like volume-reduced waste as recycled polyethylene, while recycling unreacted solvent. It is described in Japanese Patent Application Laid-Open No. 5-2
JP-A-85467 describes that the waste is dissolved in a solvent, and the volume-reduced waste and the solvent are separated and recovered from the resulting solution, and JP-A-5-310991 discloses. , In a tank equipped with an indenter, a solvent treatment method of waste formed by forming a non-flammable organic solvent layer and a water liquid layer having different specific gravities, the solvent used in these techniques, It is not harmless to the environment, nor is it intended to take out the volume-expanded expanded polystyrene as a low-viscosity solid content out of the system.

US Pat. No. 5,223,543 describes the use of activated d-limonene in the form of steam, which eliminates the problems due to the bulk of the waste. Further, JP-A-5-263065 includes at least one compound not harmful to the environment selected from d-limonene, isoamyl acetate, benzyl propionate, and ethyl butyrate, and optionally 1 to 6 volumes relative to the d-limonene. It has been described that a solvent containing 100% ethanol is used and finely crushed foam polystyrene is well stirred in this solvent to reduce the volume of expanded polystyrene waste. Although the volume-reduced expanded polystyrene is not taken out of the system as a solid having low viscosity, it is noted that it aims to use a solvent that is harmless to the environment.

However, the use of limonene as a solvent for styrene resins is well known in the art. For example,
Japanese Patent Application Laid-Open No. 52-54726 discloses an adhesive obtained by dissolving a styrene resin in limonene, which does not cause pollution.
In addition, in order to improve the point that this adhesive has poor evaporation power and lacks slow drying property, a limonene / ethanol mixture is used, and a styrene resin is mixed with a small amount of vinyl acetate or itaconic acid to dissolve in this mixture. It is disclosed that a polymerized product is used while avoiding insolubilization of the resin, and JP-A-5-117464 discloses that by mixing a terpene compound with an aromatic vinyl resin, fluidity is improved. And improving moldability. Also,
Citrus oil-based detergents, oily stain removers and cleaners used especially as cleaning agents for circuit boards are currently marketed under the trade name of Citrus Miracle. This product, Citrus Miracle, Includes citrus oil, alkaline chemicals, surfactants, stabilizers and colorants, boiling point of about 177 ° C., freezing point of minus 26 ° C., flash point of about 46 ° C., viscosity similar to water, 11.
It has a PH value of 4 to 11.9, a specific gravity of 0 and 86 at 25 ° C., a volatile component ratio of about 85%, and can be stored for about two years.

Japanese Patent Laid-Open No. 5-186798 discloses a resin dissolving agent consisting essentially of a pyrrolidone organic solvent and a surfactant, wherein the pyrrolidone organic solvent and HLB are 7
The above surfactants, for example, nonionic ones such as polyoxyethylene ethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene fatty acid alkanolamide, sorbitan fatty acid ester, amino fatty acid ester, glycerin fatty acid ester, polyoxy Ethylene hydrogenated castor oil, polyoxyethylene alkylamine, fatty acid alkyl ester, sucrose fatty acid ester, polyoxyethylene alkyl ether phosphate, etc., anionic fatty acid salt, alpha olefin sulfonate, acyl taurine salt, acyl glutamate, Improves the aromaticity of solubilizers that use surfactants such as alkyl sulfosuccinates, alkyl sulfates, alkyl phosphates, and alkyl ether sulfates. Well, since the resin dissolving power, anti-redeposition power, deodorizing power, greatly improve the biodegradability,
For example, terpenes consisting of (C ₅ H ₈ ) n (n = 1-3), citral, citronellal, hydroxycitronellal, sinensal, linalool, myrcenol, α
-Pinene, β-Pinene, d-Limonene, Myrcene, etc.
If anything, there is described a water-soluble resin dissolving agent characterized by containing 2-28% by weight of a citrus terpene such as orange and lemon.

Further, JP-A-6-298992 discloses that a terpene such as d-limonene, l-limonene or dipentene is contained in an amount of 100 to 50% by weight, preferably 90 to 7.
0% by weight with linear alkylbenzene sulfonates, linear or branched alcohol ethoxylates, linear or branched alcohol ethoxysulfates, alkylsuccinates, dialkylsuccinates, fatty acid ethanolamides or ethoxylated alkylphenols 10 to 80 ° C., preferably 20 to 40 ° C., using a polystyrene solubilizer characterized by containing 0 to 50% by weight, preferably 10 to 30% by weight of a surfactant such as Temperature, the dissolution amount of polystyrene is 5 to 50 parts by weight, preferably 10 to 30 parts by weight (total 100 parts by weight), especially 95 to 50 parts by weight, preferably 90 to 70 parts by weight, and particularly the dissolving agent. It is described that 10 parts by weight of polystyrene is dissolved in 90 parts by weight. , D-limonene 85% by weight, a mixed surfactant of coconut fatty acid ethanolamide and sodium alkylsulfate 13% by weight, and diethanolamine 2% by weight were used, and 100 g of polystyrene was added to 1000 g of the dissolving agent at 20 ° C. Dissolve and let stand overnight to separate it into two layers, a polystyrene solution with a high polystyrene concentration and a dissolving agent with a low polystyrene concentration, and introduce the polystyrene solution with a higher concentration into the separator to wash water. It is described that the mixed surfactant is separated by washing three times with, and the polystyrene solution in which the surfactant is separated is distilled with a distillation apparatus, d-limonene is recovered by evaporation and condensation, and polystyrene is recovered in a concentrated state. However, in this technique, polystyrene is completely dissolved without using water. Then the surfactant is washed away with water from the polystyrene solution, d thereafter
Limonene is recovered by distillation from the solution, while polystyrene is recovered in a concentrated state.

In this case, it is not difficult to imagine the difficulty in the subsequent handling of the viscous concentrated polystyrene and the subsequent handling of the large amount of waste water containing the surfactant used for washing with water, and the large consumption of the surfactant and the like. It is not difficult to imagine that there are problems associated with the treatment of low-concentration polystyrene solution.

[0018]

DISCLOSURE OF THE INVENTION The object of the present invention is to improve the above-mentioned problems in the prior art, to have a high affinity with expanded polystyrene, and to reduce the volume of the expanded polystyrene, and to reduce the volume of expanded polystyrene. A volumetric solution of expanded polystyrene that can be taken out of the system as a low-concentration solid content and is harmless in the environment because it does not have toxicity problems and does not require waste liquid treatment. An undiluted composition is provided. Another object of the present invention is to provide an emulsion-type volume-reduced liquid composition of expanded polystyrene prepared from the volume-reduced liquid stock solution composition. It is another object of the present invention to provide a method for efficiently producing the above-mentioned reduced volume undiluted solution with high yield.

[0019]

Means for Solving the Problems As a result of intensive studies on the above problems, the present invention has been completed. These objects of the present invention include (1) "(A) d-limonene stock solution 50".
To 99 parts by weight, preferably 70 to 98 parts by weight, (B) H
1.0-30.0 parts by weight of surfactant having LB or added HLB of 6.0-30.0, preferably 1.0-20.0
Parts by weight, more preferably 1.0 to 10.0 parts by weight and optionally (C) an auxiliary agent for stabilizing emulsion and / or preventing skin roughness 0.0 to 5.0 parts by weight, preferably 0.5 to 3 parts by weight. .0
30 parts by weight of (D) animal or vegetable oil, if desired.
(2) The surfactant of (B) above is a linear alkylbenzene sulfonate, a linear or branched polyoxyethylene linear or branched, characterized by containing less than or equal to parts by weight. Alkyl ether, polyoxypropylene linear or branched alkyl ether, linear or branched alkyl ether of mixed condensate of ethylene oxide and propylene oxide, polyoxyethylene linear or branched alkyl ether sulfone Acid salt,
Polyoxyethylene linear or branched alkyl ether phosphonate, polyoxyethylene linear or branched alkyl ether carboxylic acid salt, polyoxyethylene linear or branched alkyl ether carboxylic acid ester, polyoxyethylene Sorbitan-fatty acid ester (ethylene oxide condensate of sorbitan fatty acid ester),
A surfactant selected from the group consisting of polyoxyethylene alkylphenols having 4 to 50, preferably 5 to 20 ethylene oxide units, polyoxyethylene alkyl and dialkyl succinic acid compounds such as polyoxyethylene dioctyl succinate; (1) Expanded polystyrene volume-reduced liquid stock solution composition ”.

Further, the above object of the present invention is (3) "The surfactant of (B) has an HLB value of 6.5 to 20.
1.0 to 30.0 parts by weight, preferably 1.0 to 20.0 parts by weight, and more preferably 1.
0 to 10.0 parts by weight of the expanded polystyrene volume-reduced liquid stock solution composition (2),
(4) “The nonionic surfactant of (B) is a polyoxyethylene sorbitan fatty acid ester or a polyoxyethylene alkyl- or alkenyl-ether. Undiluted solution composition ", (5)" polyoxyethylene sorbitan fatty acid ester in the nonionic surfactant (B) has the following chemical formula:

[0021]

Embedded image (In the above chemical formula, R ₁ is CH ₃ (CH ₂ ) ₇ CH═CH
(CH ₂ ) ₇ -group, and a + b + c is 0, 10 or 20), which is an ethylene oxide condensate of sorbitan-monooleate, or the polyoxyethylene alkyl ether is of the general formula _{CH 3 (CH 2) 11 -O-} ( in the above chemical formula, n 4 to 50, preferably an integer of _{5~20) (CH 2 CH 2 O} ) n-H polyoxyethylene represented by (4) Expanded polystyrene volume-reduced liquid stock solution composition (4), which is lauryl ether, (6) "(A) d-limonene stock solution 50-99 parts by weight, preferably 70-98 parts by weight, ( B) 1.0 to 30 parts by weight of nonionic surfactant, preferably 1.0 to 7.5 parts by weight, 0.0 to 5.0 parts by weight of (C) auxiliary agent for stabilizing emulsion and / or preventing rough skin. Part, preferably 1.0-3.0 The amount unit and (D) animal and vegetable oils 0-3
0 parts by weight, (A) d-limonene undiluted solution is 95 parts by weight or more, (D) animal and vegetable oil is not included,
When the d-limonene stock solution of (A) is 70 parts by weight or more and less than 95 parts by weight, animal or vegetable oil is contained in an amount such that the sum of the weight thereof with the d-limonene stock solution of (A) is less than 99 parts by weight. And the expanded polystyrene reduced-volume liquid concentrate composition according to any one of (3), (4), or (5) above,
(7) "As the auxiliary agent of (D), one or more kinds selected from the group consisting of fatty acid triethanolamine, fatty acid diethanolamine, fatty acid ethanolamine, ethanolamine, lecithin, monoglyceride, sugar ester, and fatty acid alkanolamide are contained. (3), (4), (5) or (6) expanded polystyrene volume-reduced liquid stock solution composition, characterized in that
"The above-mentioned (3), (4), (5), characterized in that it contains 0.5 to 3.0 parts by weight of the auxiliary agent for stabilizing emulsion and / or preventing skin roughness of (C). (6) or (7)
(9) "(C) The animal or vegetable oil (C) is a non-drying oil or a semi-drying oil having an iodine value of 150 or less. (3) Reduced volume undiluted solution composition of polystyrene ", (10)" d-limonene undiluted solution is citrus oil extracted from juice of citrus fruit skin, (3),
(4), (5), (6), (7), (8) or (9) the expanded polystyrene reduced volume liquid concentrate composition.

Further, the above object of the present invention is (11).
"(A) d-limonene stock solution 50 to 99 parts by weight, preferably 70 to 98% by weight, (B) at least two nonionic surfactants 1.0 to 30.0 parts by weight, preferably 1.0.
To 20.0 parts by weight, more preferably 1.0 to 7.5 parts by weight, and optionally (C) an auxiliary agent for stabilizing emulsion and / or preventing rough skin, 0.0 to 5.0 parts by weight. , Preferably 0.5 to 3.0 parts by weight, and optionally 30 parts by weight or less of (D) animal or vegetable oil, and the non-ionic surfactant has an added HLB value of 6.0 to 30.0. In the range (1) or (2), the composition of the expanded polystyrene reduced-volume liquid concentrate, (12) and (B), wherein at least two nonionic surfactants are (11) Composition of concentrated liquid concentrate solution of expanded polystyrene, characterized by comprising a mixture of oxyethylene sorbitan fatty acid ester and polyoxyethylene alkyl- or alkenyl-ether, (13) "polyoxyethylene" Sorbitan Fatty acid ester, the following formula

[0023]

Embedded image (In the above chemical formula, R ₁ is CH ₃ (CH ₂ ) ₇ CH═CH
(CH ₂ ) ₇ -group, and a + b + c is 0, 10 or 20), which is an ethylene oxide condensate of sorbitan-monooleate, wherein the polyoxyethylene alkyl ether has the following general formula: A polyoxyethylene lauryl ether represented by CH ₃ (CH ₂ ) ₁₁ —O— (CH ₂ CH ₂ O) n—H (wherein n is 4 to 50, preferably an integer of 5 to 20). And (14) "(A) d", which is the above-mentioned (12) expanded polystyrene reduced-volume liquid concentrate composition.
-Limonene stock solution 50 to 99 parts by weight, preferably 70 to 98
Parts by weight, (B) nonionic surfactant 1.0 to 30.0
Parts by weight, preferably 1.0 to 7.5 parts by weight, (C) an auxiliary agent for stabilizing emulsion and / or preventing rough skin 0.0 to 5.
0 parts by weight, preferably 0.5 to 3.0 parts by weight and (D)
When the amount of the (A) d-limonene stock solution is 95 parts by weight or more, the animal-vegetable oil of (D) is not included, and the d-limonene stock solution of (A) is 70 parts by weight or more and 95 parts by weight or more. When the amount is less than 100 parts by weight, the animal and vegetable oil is contained in an amount such that the total weight of the (A) d-limonene stock solution is less than 99 parts by weight, (11), (12) or (13) above. One or more selected from the group consisting of ethanolamine, lecithin, monoglyceride, sugar ester, and fatty acid alkanolamide as the above (D) auxiliary agent. The above (1
1), (12), (13) or (14) Expanded polystyrene volume-reduced liquid stock solution composition, (16) "Aid for stabilizing emulsion and / or preventing skin roughness according to (C)" 0.5 to 3.0 parts by weight of the agent is contained, and the expanded polystyrene reduced-volume liquid concentrate composition according to (15) above, (17) "the animal and vegetable oil (C) is non-drying" An oil or a semi-drying oil having an iodine value of 150 or less, wherein (16) the expanded polystyrene volume-reduced liquid stock solution composition and (18) "d-limonene stock solution is citrus fruit peel juice. (11), (12), (13), (1), which is a citrus oil extracted from
4), (15), (16) or (17) any of the expanded polystyrene reduced volume liquid concentrate compositions.

Further, the above object of the present invention is (19).
"(B) The total amount of the nonionic surfactant and the anionic surfactant which is 1/3 or less of the nonionic surfactant is 1.0 to 30.0 parts by weight, preferably 1". .0 to
20.0 parts by weight, more preferably 1.0 to 10.0 parts by weight, and the added HLB value is in the range of 7.0 to 14.0, which is the above (1) or (2). (10) (20) "(B) above".
The nonionic surfactant is a polyoxyethylene sorbitan fatty acid ester and / or a polyoxyethylene alkyl- or alkenyl-ether, and the anionic surfactant is a polyoxyethylene alkyl and dialkyl succinic acid compound such as polyoxyethylene alkyl- or alkenyl-ether. Foaming according to (19) above, which is an anionic one selected from the group consisting of oxyethylene dioctyl succinate, linear alkylbenzene sulfonate, and polyoxyethylene linear or branched alkyl ether sulfonate. poly volume reduction stock solution of polystyrene ", a non-ionic surface active agent (21)" the (B), of the _{formula, CH 3 (CH 2) 8} -O- (CH 2 CH 2 O) 9 H (9) and polyoxyethylene nonyl ether, wherein in _{CH 3 (CH 2) 8 -O-} (CH 2 CH 2 O) 6 H A poly (6) oxyethylene nonyl ether represented by the formula: CH ₃ (CH ₂ ) ₃ CH (CH ₂ CH ₃ ) CH ₂ · OOC · CH ₂ CH (SO ₃ M) ・ COO ・ CH ₂ CH (C
H ₂ CH ₃ ) (CH ₂ ) ₃ CH ₃ Dioctyl sulfosuccinate represented by the above (20) Expanded polystyrene volume reduction liquid stock solution ”, (22)“ (A) d-limonene Undiluted solution 50-99
Parts by weight, preferably 70 to 98 parts by weight, and (B) a total of 1.0 to 3 of the nonionic surfactant and the anionic surfactant.
0.0 parts by weight, preferably 1.0 to 20.0 parts by weight, more preferably 1.0 to 10.0 parts by weight, (C) Auxiliary agent for stabilizing emulsion and / or preventing rough skin 0.0 To 5.0 parts by weight, preferably 0.5 to 3.0 parts by weight and (D) animal and vegetable oils 0.0 to 30.0 parts by weight, and (A) d-limonene stock solution is 95 parts by weight or more. In the case (D) does not contain animal and vegetable oils, the weight sum of (A) d-limonene stock solution and the d-limonene stock solution (A) is 99% by weight when the d-limonene stock solution is 70 parts by weight or more and less than 95 parts by weight. (19), (20), characterized in that the content is less than 1 part.
Or a reduced volume undiluted solution composition of expanded polystyrene of any one of (21), (23) "(D) an auxiliary agent, fatty acid triethanolamine, fatty acid diethanolamine, fatty acid ethanolamine, ethanolamine, lecithin,
One or more kinds selected from the group consisting of monoglyceride, sugar ester, and fatty acid alkanolamide are contained, (19), (20), (2) above.
(1) or (22) the expanded polystyrene reduced-volume undiluted solution composition ", (24)" 0.5 to 3% of the auxiliary agent for stabilizing emulsion and / or preventing skin roughness of (C) above. (23) The expanded polystyrene concentrate reducing liquid stock solution composition, characterized in that it contains 0 parts by weight. (25) (24) Expanded polystyrene volume-reduced liquid stock solution composition and (26) “d-limonene stock solution are citrus oils extracted from juice of citrus fruit skin” (19), (2
0), (21), (22), (23) or (24) expanded polystyrene reduced volume stock solution composition ".

Further, the above object of the present invention is (27)
"O / W obtained by diluting the above-mentioned reduced volume stock solution with water 1.5 to 10 times, preferably 2 to 7 times, and more preferably 4 to 6 times.
The type emulsion is sprayed on expanded polystyrene chips at a temperature of 10 to 80 ° C., and the expanded polystyrene chips are kneaded to obtain expanded polystyrene having a reduced volume, (1) to (26) How to use any reduced volume stock solution ".

The present invention will be described in detail below. Expanded polystyrene volume-reduced liquid stock solution of the present invention, which is an emulsion-type volume-reduced liquid prepared from an oily composition (hereinafter, also referred to as volume-reduced liquid stock solution), and is a volume-reduced polystyrene foam without dissolution or thickening. As a styrene (styrene) homopolymer, a styrene copolymer containing styrene as a main component,
For example, high impact polystyrene, acrylonitrile-styrene (AS) resin, acrylonitrile-butadiene-styrene (ABS) resin, etc. are foamed with a foaming agent such as n-pentane, nitrogen gas, carbon dioxide, sodium carbonate, azodicarboxylic acid amide. I can list things.

The stock solution of the reduced volume of the present invention is diluted with water to a ratio of 1.5 to 10 times, preferably 2 to 7 times, more preferably 4 to 6 times, before use, so that it is an O / W emulsion type. Easily prepared into a volume reducing solution. Furthermore, the volume-reduced liquid stock solution and emulsion-type volume-reduced liquid of the present invention have a high affinity with expanded polystyrene and are excellent in solubility, and at the same time, are highly safe to the human body during handling, and further have high biodegradability, and therefore are environmentally friendly. (A) d-limonene liquid, which is free from contamination, is used. Since the d-limonene liquid has a citrus scent, it does not produce an offensive odor during use and is easy to handle. Specific examples of the d-limonene undiluted solution include vegetable oils such as orange oil, lemon oil, mandarin oil, lime oil, bergamot oil, caraway oil, and fennel oil. d-limonene stock solution has the following chemical formula

[0028]

Embedded image Approximately 50% by weight of d-limonene as a main component
Anything including the above may be used. Furthermore, the d-limonene stock solution may be used alone or in combination of two or more kinds. A preferred d-limonene stock solution is citrus oil. Citrus oil is usually obtained by extracting and purifying the juice obtained by pressing the skin of citrus fruits. It is not absolutely necessary to perform extraction processing and purification processing of the squeezed juice, but it is preferable to apply it. The main component of citrus oil contains 70% to 90% by volume of d-limonene, and other components include other terpenes, compounds having an isoprenoid structure, which is a C ₅ substance, and camphor-type C ₁₀ substances. Examples thereof include C ₁₀ H ₆ which is an oxidized derivative.

The squeezed juice obtained by squeezing the whole citrus fruit peel, and in some cases the whole peeled fruit, contains some suspended suspended solids, dust and the like. Preferably, the suspended suspended solids and dust are removed by filtration. The target substance d-limonene in the squeezed juice is an oily substance which originally has a very low solubility in water, but it is caused by the emulsifying action of amino acids and sugar derivatives slightly contaminated in the squeezed juice. As a result, one part of the O / W emulsion liquid is easily generated.
It is desirable to consider eliminating the amino acids and sugar derivatives,
Since these amino acids and sugar derivatives are mostly present in the water phase, it is preferable to wash the extracted oil phase with water.

Another important point is the function of enzymes contained in citrus fruits and fruit peels. This enzyme converts the citrus oil component into another substance, and therefore has a function of decreasing the citrus oil content with the passage of time after the citrus fruit is picked.
The decrease in citrus oil content, generally in proportion to the decrease in fruit freshness, is mainly due to the action of this enzyme. The action of this enzyme is strongest when it is present in the tissues of fruits and fruit skins, and its action is weakened in squeezing juice, so it is essentially preferable to squeeze juice as soon as possible after harvesting. Also, 60 ° C
Oxygen can be deactivated by heating the juice to the above temperature, but since the main body of the enzyme is a water-soluble protein, it is more preferable to remove it from the oil phase by the extraction and washing of the extract with water. As the extraction solvent, use various water-insoluble and immiscible solvents such as ethers such as diethyl ether, esters such as ethyl acetate, ethyl butyrate, isoamyl acetate, petroleum hydrocarbon solvents, halogenated hydrocarbons, etc. You can Ethyl butyrate, isoamyl acetate and the like are preferably used from the viewpoints of environmental impact, aroma, and affinity for expanded polystyrene.

The oil phase washed with water is not dehydrated, or is preferably dehydrated with, for example, anhydrous sodium sulfate and then purified, for example, with activated carbon. The purification removes significant color components. However, it cannot be completely decolorized by the refining and a refined product of light yellow and light brown citrus oil is obtained, but in practice, even such a light color citrus oil has a volume reduction effect. It doesn't matter at all. If desired, a colorless citrus oil can be obtained by further distillation treatment or sufficient activated carbon treatment. By such an operation, citrus oil containing a high content of highly active d-limonene can be obtained in a high yield.

Citrus oils can also undergo chemical changes such as oxidation under air and light during storage. Therefore, the fresher the citrus oil, the greater the activity against expanded polystyrene, that is, the volume reducing effect, but in order to suppress the chemical change, a reducing agent such as ascorbic acid or hydroquinone can be used in combination. The d-limonene liquor can of course also be used in combination with other petroleum fractions, other solvents such as acetone, methyl chloride, dioxane, but this combination does not always lead to surprising results. It should be noted that vapors of such other solvents are sometimes harmful and / or flammable to humans.

The amount of the d-limonene solution to be mixed is 50 to 99 parts by weight, preferably 70 to 9 parts by weight based on the total weight of the stock solution of reduced volume.
8 parts by weight. When the amount is less than 50 parts by weight, the volume reduction of the waste is not sufficient when the volume reduction liquid is prepared by diluting with water. If the amount exceeds 99 parts by weight, the waste is completely dissolved in the volume-reducing liquid, so viscous liquid polystyrene cannot be easily separated and recovered from the volume-reducing liquid, or the volume is reduced. The discharged expanded polystyrene effluent may become a strong lump, and it may be necessary to perform subsequent unraveling. For this reason, expanded polystyrene cannot be treated economically and quickly. The formation of the solid mass also occurs when the volume reducing solution is used in too much excess.

The stock solution of reduced volume of the present invention contains a sufficient amount of the emulsifier (B) so as to give an O / W type emulsion solution which retains sufficient activity when diluted with water. As the emulsifier, various cationic surfactants, anionic surfactants, nonionic surfactants, and zwitterionic surfactants can be used. The emulsifiers may be used alone or in combination of two or more. When two or more kinds are used in combination, it is desirable to use an emulsifier having at least one kind having a large amount of lipophilic groups and therefore having a moderately high HLB.

In the present invention, many surfactants can be used for emulsifying d-limonene, and examples thereof include linear alkyl benzene sulfonates, polyoxyethylene linear or branched alkyl ethers, and polyalkyl ethers. Oxyethylene linear or branched alkyl ether sulfonate, phosphonate, carboxylate, polyoxyethylene sorbitan-fatty acid ester (ethylene oxide condensate of sorbitan fatty acid ester), polyoxyethylene alkylphenol, polyoxy Mention may be made of ethylene alkyl and dialkyl succinic acid compounds such as polyoxyethylene dioctyl succinate. The polyoxyethylene alkylphenol has various side chain alkyl groups and various ethylene oxide unit numbers, preferably 4 to 50 ethylene oxide unit numbers, more preferably 5 to 20 ethylene oxide unit numbers, More preferably, those having 7 or 8 ethylene oxide units can be mentioned.
These surfactants are for illustration only and not for limiting the invention.

The emulsifier is used when a stock solution of the oil-reduced volume reducing solution of the present invention is mixed with water to form a reduced solution emulsion.
By forming an O / W emulsion liquid and activating citrus oil,
Enhances affinity with expanded polystyrene and reduces volume well. That is, the volume-reducing liquid of the present invention forms minute micelles of the volume-reducing liquid stock solution in the O / W type emulsion liquid, and penetrates evenly and sufficiently through the crevices of the crushed expanded polystyrene to the inside thereof. Then, the foamed portion is destroyed.

When used alone, the HLB is 6.5-2.
A nonionic surfactant of 0.0 is preferable, an HLB of 7.0-15.0 is more preferable, and an HLB of 7.0-14.0 is more preferable.

Examples of these surfactants include sorbitan monopalmitate (Span40) (HLB = 6.7), sorbitan monooleate + 2 (C ₂ H ₄ O) (HLB = about 7), n -Butanol (HLB = 7), sorbitan monolaurate (Span20) (HLB = 8.6), polyoxyethylene (4) lauryl ether (HLB = 9.5), polyoxyethylene (4) sorbitan monostearate (HLB = 9.6), polyoxyethylene (5) sorbitan monooleate (HLB = 10.0), sorbitan monooleate + 5 (C ₂ H ₄ O) (HLB = 10), C ₁₈ H _{37 N (CH 2 CH 2 OH)} (CH 2 CH 2 OCH 2 CH 2 OH) (HLB = 10), polyoxyethylene (4) sorbitan Tantristearate (HLB = 10.5), Polyoxyethylene (4) sorbitan trioleate (HLB = 11.0), Polyoxyethylene glycol 400 monooleate (HLB = 11.4), Poly Oxyethylene glycol 400 monostearate (HLB = 11.6), triethanolamine oleate (HLB = 12.0), polyoxyethylene (9) nonylphenol (HLB = 13.0), polyethylene glycol 400 monolaurate (HLB = 13.1), polyoxyethylene (4) sorbitan monolaurate (HLB = 13.3), sorbitan monooleate + 10 (C ₂ H ₄ O) (HLB = 13.5), polyoxy Ethylene (20) Rubitan monostearate (HLB = 14.9), sorbitan monooleate + 20 (C ₂ H ₄ O) (Tween80) (HLB = 15), polyoxyethylene (20) sorbitan monooleate (HLB =) 15.0), polyoxyethylene (20) stearyl ether (HLB = 15.3), polyoxyethylene (20) oleyl ether (HLB = 15.4), polyoxyethylene (20) sorbitan monopalmitate (HLB) = 15.6), polyoxyethylene (20) cetyl ether (HLB = 15.7), polyoxyethylene (30) stearic acid ester (HLB = 16.0), polyoxyethylene (40) stearic acid ester (HLB) = 16.9), sodium oleate (HLB = 18) .0), polyoxyethylene (100) stearic acid ester (HLB = 18.8), and the like. Among these surfactants, ie, emulsifiers, more preferable emulsifiers have the following chemical formulas.

[0039]

Embedded image (In the above chemical formula, R ₁ is CH ₃ (CH ₂ ) ₇ CH═CH
(CH _{2) 7} - a and, a + b + c is, 0, 10, or 20. ) Is an ethylene oxide condensate of sorbitan-monooleate. In addition, the above R ₁
Similarly, an ethylene oxide condensate of sorbitan monostearate in which is a stearyl group is also preferable.

Further, R ₂ —O— (CH ₂ CH ₂ —O) n—H (wherein R ₂ is an alkyl or alkenyl group such as nonyl, lauryl, palmityl, myristyl, stearyl, oleyl, etc., n is a positive number of 3 to 30, preferably 4 to 20), such as polyoxyethylene alkyl- or alkenyl-ethers such as polyoxyethylene lauryl ether and poly (6) oxyethylene nonyl ether (CH ₃ (CH ₃ (CH _{2) 8 -O- (CH 2 CH} 2 O) 6 H), poly (9) oxyethylene nonylphenyl ether (CH ₃ (C
_{H 2) 8 -O- (CH 2} CH 2 O) 9 H) it can also be preferably used.

These can be used, for example, as the polyoxyethylene sorbitan fatty acid ester alone or in combination with the polyoxyethylene alkyl- or alkenyl-ether.

In the present invention, a nonionic surfactant such as ethylene oxide condensate of sorbitan-fatty acid ester or polyoxyethylene alkyl- or alkenyl-ether and an anionic surfactant may be used in combination. In this case, the amount of the anionic surfactant used is 1/3 or less, preferably 1/4 or less of that of the nonionic surfactant. The amount of anionic surfactant used is 1
When it exceeds / 3, it becomes difficult to suppress the desired HLB value. Examples of preferable anionic surfactants include dialkyl succinic acid compounds such as polyoxyethylene dioctyl succinate (CH ₃ (CH ₂ ) ₃ CH (CH ₂ CH ₃ ) CH ₂ OOCCH ₂ CH (S
O ₃ M) ・ COO ・ CH ₂ CH (CH ₂ CH ₃ ) (CH ₂ ) ₃ CH ₃ ), linear alkylbenzene sulfonate, polyoxyethylene linear or branched alkyl ether sulfonate be able to.

It is more preferable to use a combination of a plurality of surfactants, in which case the added HLB is 6.0 to 6.0.
It is adjusted to be in the range of 30.0, more preferably 6.5 to 20.0, and most preferably 7.0 to 15.0.
That is, when at least two or more different kinds of surfactants are used in combination, not only the number of kinds of surfactants preferably used increases, but also the preferable addition HLB range as a result of combination increases. For example, the following chemical formula

[0044]

Embedded image (In the above chemical formula, R ₁ is CH ₃ (CH ₂ ) ₇ CH═CH
A polyoxyethylene sorbitan fatty acid ester having an HLB of 6.5 to 11.5, such as polyoxyethylene sorbitan monooleate having a (CH ₂ ) ₇ -group and a + b + c is 0, 10 or 20; R ₂ —O— (CH ₂ CH ₂ —O) nH (wherein R ₂ is an alkyl or alkenyl group such as nonyl, lauryl, palmityl, myristyl, stearyl, oleyl, etc., and n is 3 ~ 30, preferably a positive number from 4 to 20), such as polyoxyethylene alkyl- or alkenyl-ethers having an HLB of 8.5-12.
5, such as polyoxyethylene lauryl ether and poly (6) oxyethylene nonyl ether (CH ₃ (C
_{H 2) 8 -O- (CH 2} CH 2 O) 6 H), poly (9) oxyethylene nonylphenyl ether _{(CH 3 (CH 2) 8} -O-
(CH ₂ CH ₂ O) ₉ H) instead of using each alone, HLB is different in the range of 1 to 40 and additive is added in an appropriate amount ratio to add HLB.
It is more preferable to use the polyoxyethylene sorbitan monooleate such as polyoxyethylene sorbitan monooleate having a HLB of 6.5 to 11.5 and a polyoxyethylene lauryl ether. Polyoxyethylene alkyl- or alkenyl ether having an HLB of 9.5 to 19 can be blended in an appropriate amount ratio so that the added HLB becomes 7.0 to 14.0 and used. A nonionic surfactant having an HLB of 9.5 such as poly (4) oxyethylene lauryl ether is used in combination with a very small amount of an anionic surfactant having a very high HLB such as sodium dodecylbenzenesulfonate. It is preferable to use it so that the added HLB becomes 7-14.

In any case, when the volume-reduced liquid stock solution composition of the present invention is diluted and used, desired use conditions such as volume reduction time required, treatment temperature, and mechanical pressure applied for volume reduction are required. Since the hardness, cost, etc. of the volume-reduced expanded polystyrene foam to be discharged vary considerably depending on the user, an HLB having a considerable width is necessary to meet a wide range of users' needs. However, when the HLB surfactant in the above range is used, it is possible to meet those needs.

The amount of the surfactant (emulsifier) to be blended is 0.1 to 30, preferably 1.
0-20.0 parts by weight, most preferably 1.0-12.0
Parts by weight. If the amount is less than 0.1 part by weight, the volume-reducing liquid does not sufficiently form an O / W type emulsion liquid when the volume-reducing liquid stock solution is mixed with water and used even when high-quality dilution water is used. Therefore, the foamed part of the waste is not sufficiently destroyed.
If it exceeds 30 parts by weight, even if diluting water having a high degree of pollution and high hardness is used, an O / W type emulsion liquid having a strong dissolving power is formed, so that the foamed portion is destroyed but the volume is reduced. It becomes difficult to separate and collect the O / W type emulsion liquid from the adhesive polystyrene.

Examples of the auxiliary agent (C) used in the stock solution for reducing volume of the present invention include fatty acid ethanolamines such as caprylic acid, lauric acid, myristic acid, palmitic acid, stearic acid and behenic acid; Fatty acid triethanolamine, monoethanolamine, diethanolamine, triethanolamine, the following general formula

[0048]

Embedded image (However, R ₂ represents a higher aliphatic group such as a palmityl group (pentadecanyl group), a stearyl group (hexadecanyl group), an oleyl group (hexadecenyl group), and the following general formula:

Embedded image (However, R ₃ represents a higher alkyl group.) A monoglyceride represented by the following general formula

[0049]

Embedded image (However, R ₃ represents a higher alkyl group.) A sugar ester represented by the following general formula

[0050]

[Chemical 6] (However, R ₃ represents a higher alkyl group.) And the like fatty acid alkanolamides can be used. Of these, fatty acid ethanolamines can be preferably used from the viewpoints of volume reduction, skin irritation, and the like. However, it is desirable to suppress the use of the above-mentioned amine acids and amides as much as possible from the viewpoint of the environment. Furthermore, the ascorbic acid that can be added to prevent the deterioration of the d-limonene stock solution also functions as an auxiliary agent.

The auxiliaries used in the concentrated solution of the present invention are
The auxiliaries can be used alone or as a mixture. These auxiliaries prevent skin roughening when using the reduced-volume undiluted solution of the present invention, and also function as auxiliary components of the emulsifier.
The blending amount of the auxiliary agent with respect to the total weight of the volume-reduced liquid stock solution is 0.1 to
The amount is 5.0 parts by weight, preferably 0.1 to 3.0 parts by weight. If it is less than 0.1% by weight, the effect of preventing rough skin and the function as an auxiliary component of an emulsifier are insufficient.
If it exceeds 5.0 parts by weight, the above-mentioned effects and functions are not increased, so that it is not economical.

The stock solution of reduced volume of the present invention may contain an alkaline chemical such as calcium hydroxide, sodium hydroxide, sodium carbonate, sodium hydrogencarbonate, etc. within a range not impairing its function. The pH value of the stock solution of reduced volume is 9 to 14, preferably 10 by adding an alkaline chemical.
By adjusting the amount to be ~ 12, the effect of volume reduction can be further increased. A stock solution with a high PH value wins with problems in wastewater treatment during and after use. Examples of animal and vegetable oils (D) optionally used together with the volume reducing solution of the present invention for reducing stickiness include non-drying oils such as olive oil, coconut oil, palm oil, castor oil, soybean oil, cottonseed oil, and sesame oil. Semi-drying oil such as can be used. Preferred animal and vegetable oils are non-drying oils, semi-drying oils having an iodine value of 150 or less, or semi-drying oils having a high oleic acid content and a low linolenic acid content. These fats and oils have the effect of reducing the tackiness of volume-reduced polystyrene and facilitating its handling. The blending amount of fats and oils is 0.1 to 30 parts by weight, preferably 0 to 20 with respect to the total weight of the volume-reduced liquid stock solution.
Parts by weight, most preferably 0 to 10 parts by weight. If the amount is less than 0 parts by weight, the volume-reduced polystyrene may be in the form of an adhesive gel, which is not easy to handle.
If it exceeds 30 parts by weight, the effect of reducing the tackiness does not increase despite the large amount of compounding, which is not economical. Also,
When the amount of these (D) oils used is large, the volume-expanded expanded polystyrene discharge may become a strong lump, which may require additional handling. Further, these oils (D) have the ability to collapse the foam portion of expanded polystyrene, similar to d-limonene, and the ability may be the same as d-limonene, or sometimes even higher than d-limonene. Therefore, when 95 parts by weight or more of d-limonene is contained in the reduced volume stock solution, it is not necessary to use the animal and vegetable oil (D), and when d-limonene is 80 to 95 parts by weight, d
-It is preferable to use these (D) animal and vegetable oils in combination depending on the decrease in the amount of limonene used.

Furthermore, the reduced-volume liquid stock solution of the present invention is cetyl alcohol (HLB = 1), sorbitan trioleate (HLB = 1.8), sorbitan tristearate (Span65) (Span65) HLB = 2.1), propylene glycol monostearate (HLB = 3.4), sorbitan distearate (HLB = about 3.5), sorbitan sesquioleate (HLB = 3.7), glycerol monostearate Acid ester (non-self-emulsifying) (HLB = 3.8), sorbitan monooleate (Span80) (HLB = 4.3), propylene glycol monolaurate (HLB = 4.5), sorbitan monostearate (Span60) (HLB = 4.7), diethylene glycol Nostearate (HLB = 4.7), glycerol monostearate (self-emulsifying) (HLB = 5.5), diethylene glycol monolaurate (HLB = 6.1), potassium oleate (HLB = 20. 0), cetylethylmorpholinium ethosulfate (HLB = 25 to 30), sodium lauryl sulfate (HLB = about 40), and the like can be used together. Also, polyoxyethylene alkyl amines, polyoxyethylene alkyl amides, polyoxyethylene alkyl ether phosphates, polyoxyethylene alkyl sulfonates and carboxylates, polyoxyethylene alkyl- and dialkyl succinic acid compounds having various numbers of ethylene oxide units. For example, by using polyoxyethylene dioctyl succinate, polyoxyethylene alkyl- and dialkyl adipate compounds, polyoxyethylene alkyl- and dialkyl glutarate compounds, etc.
B's. The volume-reduced liquid stock solution of the present invention containing such various components usually has a boiling point of about 150 ° C to 200 ° C, a freezing point of about -20 ° C to -30 ° C, and about 35 ° C to 55 ° C.
C flash point, PH value of 0.5-13, 0.80-0.
It has a specific gravity of 92.

The stock solution of the reduced volume of the present invention is 1: 1 to
The O / W type emulsion liquid was prepared by mixing with water at a weight ratio of 1:10, and the O / W type emulsion liquid was sprayed on crushed expanded polystyrene chips, and then kneaded to reduce the solubility to reduce the volume of the emulsion liquid. Separate from polystyrene. The polystyrene from which the emulsion liquid has been separated is subjected to volume reduction and stain removal, and is produced as a clean white lump. Such cleaning is one of the secondary effects exhibited by the volume reducing liquid of the present invention. The polystyrene thus separated can be reused as a raw material for synthetic resin and also as a raw material for volatile oil, tar and the like. The reduced volume stock solution of the present invention is
5 to 50 parts by weight, preferably 10 to 30 parts by weight of expanded polystyrene to be volume-reduced, and an emulsion liquid of a volume-reducing liquid stock solution, that is, 95 to 50 parts by weight, preferably 90 to 7 parts by weight.
0 parts by weight are used in contact.

When the polystyrene chips which have been reduced in volume by the reduced-solution emulsion of the present invention and collected in a carmel form are somewhat sticky, a water-soluble alcohol should be sprinkled in order to facilitate the subsequent handling. By
Can be coagulated to remove stickiness. As the water-soluble alcohol, ethanol can be preferably used from the viewpoint of the difference in boiling point from citrus oil and the effect on the environment, and the ethanol used is pressed and solidified of the volume-reduced polystyrene pellet assembly. By the liquid separation, the reduced solution can be taken out together and can be separated and recovered from other reduced solution components in the distillation of the reduced solution or the heat striping operation. On the other hand, when a reduced solution emulsion containing no fat and oil component is used, it becomes more difficult to remove the tackiness by alcohol.

As described above, the present invention uses an emulsion-type reduced solution prepared from an activated oily reduced-volume stock solution in the form of a heated liquid, which results from the bulkiness of expanded polystyrene. Solve the problem. This activated reduced volume liquid emulsion is extremely useful for simplifying the heat treatment and incineration operations of expanded polystyrene. The volume-reduced aggregate product obtained according to the invention can be easily unraveled by hand and can be jetted into many commercial furnaces for burning high calorific fuels for the purpose of energy saving. After the volume reduction of the expanded polystyrene, the volume reduction liquid emulsion becomes fatigued as described above. When used only in the form of steam, during the volume reduction process of expanded polystyrene, the dissolution rate of expanded polystyrene becomes indefinite over time, and sometimes the dissolution rate becomes too small and interferes with the progress of volume reduction operation. However, the present invention solves this problem.

The volume-reducing liquid stock solution of the present invention is obtained by crushing a used expanded polystyrene molded article into small pieces, and then spraying the O / W type emulsion volume-reducing solution prepared from the volume-reducing solution stock solution of the present invention. Then, the foamed portion of the expanded polystyrene is destroyed, its volume is reduced to about 2 to 60% of the original volume, and the expanded polystyrene component reduced in volume from the mixture, that is, polystyrene and the emulsion liquid are separated and recovered. It is used in the volume reduction processing method of polystyrene. Therefore, the emulsion-type reduced solution prepared from the volume-reduced solution stock solution of the present invention can be used in any method and in any apparatus within the scope of the above volume-reducing treatment method as long as it does not deviate from the purpose of reducing the volume of expanded polystyrene. Can be used. For example, it can be used in the specific method described below.

FIG. 1 shows an outline of an example of a volumetric polystyrene volume reducing apparatus. In this device, a plurality of cylindrical containers having different diameters are connected in series, and a screw conveyor having a different structure and a different rotation speed is incorporated in each cylindrical container. Further, a foaming polystyrene crushing unit, a storage tank, and an O / W type emulsion liquid of the volume reducing liquid stock solution, that is, a circulation system of the volume reducing liquid emulsion are additionally provided.

In the expanded polystyrene volume reducing device shown in FIG. 1, a used expanded polystyrene molded product (1) is used.
Is a styrene foam crushing unit (2) from the charging port (3)
1 is located immediately below the crushing drum (4), as pre-crushed in blocks, as if crushed by a bar (5) embedded in a rotating crushing drum (4).
The primary crushing is performed by the secondary crushing roller (6) into lumps. 2 more
The secondary crushing roller (7) secondarily crushes the foamed polystyrene into chips having a size of about a cigarette filter. The secondary crushing roller (7) has a notch gear-shaped crushing portion having different rotation speeds, whereby a crushing force and a shearing force are applied, and as a result, foaming in the form of chips passing through the secondary crushing roller (7). Polystyrene simply has many irregularities, and not only the surface area / volume increases, but also cracks and crevices are formed in the inside thereof, and the volume reducing liquid quickly penetrates into the inside through these crevices and crevices.

When the expanded polystyrene molded product is small and thin, such as a container for instant food, the crushing drum (4), the primary crushing roller (6) or 2
It may be immediately stored in the storage tank (10) without being crushed by the next crushing roller (7), or may be directly stored in the hopper (1) of the expanded polystyrene volume-reducing device (17).
6a). Of course, the crushing treatment can be performed by only one of the crushing means.

The foam polystyrene chips crushed by the crushing unit (2) in this way are stored in the storage tank (1) by the flexible tube (9) via the screw conveyor (8) provided at the bottom of the crushing unit (2).
0). The storage tank (10) has a motor (11) as a power source for transferring chip-shaped expanded polystyrene at the top thereof, and a level sensor (12) for monitoring the storage level of the chip-shaped expanded polystyrene at the upper and lower portions, respectively. And a level sensor (13), a screw conveyor (14) and a flexible tube (1) at the bottom.
5).

The expanded polystyrene in the form of chips stored in the storage tank (10) passes through the flexible tube (15) via the screw conveyor (14) provided at the bottom of the storage tank (10) to reduce the amount of expanded polystyrene. It is transferred and introduced into the hopper (16b) of the main body (17) of the volatilization device. This transfer power source is a motor (16).

The main body of the volume reducing device has a heat insulating means on the outer circumference of the cylindrical container. The heat retaining means may be one in which a heating wire is wound in a coil shape on the outer periphery of the cylindrical container, or a flexible planar heating element is wound on the outer periphery of the cylindrical container, and further, a water jacket for retaining heat. May be The volume reducing device is preferably used while being heated and kept at about 40 ° C. to 80 ° C., usually about 60 ° C., but the temperature of the second reducing container (19) is higher than the temperature of the first reducing container (18). It may be a little (about 0 to 10 ° C., usually about 3 to 7 ° C.) lower.

The main body (17) of the volume reduction device is a first reduction container (1) in two upper and lower stages in which horizontally long cylinders are assembled in an upright type.
8) and a second reduction container (19). As shown in FIG. 2, inside the reducing container (18) and the reducing container (19), a screw conveyor-shaped first volume-reducing blade for transferring chip polystyrene foam while kneading with the volume-reducing liquid. (1
8a) and a second volume reduction vane (19a) are provided.

The volume of the expanded polystyrene in the form of chips is smaller and smaller when it is present in the second reduction container (19) than when it is present in the first reduction container (18). Therefore, the diameter of the second reducing container (18) is smaller than the diameter of the first reducing container (19). Further, in the expanded polystyrene, the density and the transfer resistance increase with the progress of the volume reduction treatment. The first volume reduction blade (18) of the first volume reduction container (18)
The spiral interval of a) is smaller than the spiral interval of the second volume reduction blades (19a) of the second reduction container (19).

The rotation speeds of the first volume reduction blade (18a) and the second volume reduction blade (19a) are also different. First reduction container (18
The diameter of a) and the diameter of the second reduction container (19) are, for example, 8 inches for the former and 6 inches for the latter, but each volume reduction blade (1
By adjusting the difference in the rotational speeds of 8a) and (19a), the mismatch between the difference in the diameter of the reduced container and the difference in the degree of progress of volume reduction of the expanded polystyrene in the reduced container is mitigated.

Further, the volume reducing device (17) is provided with a volume reducing liquid circulation system. This volume reduction liquid circulation system is a spray for spraying the volume reduction liquid supplied from the volume reduction liquid tank (21) through the volume reduction liquid mixing tank (20) into the first cylindrical volume reduction container (18). A device (23), a volume-reduced liquid recovery tank (22) for receiving the volume-reduced liquid separated and recovered from the volume-reduced expanded polystyrene, a volume-reduced liquid tank (21) and a volume-reduced liquid mixing tank (20). Between the volume reduction liquid recovery tank (22) and the volume reduction liquid mixing tank (20), a pipe connecting the volume reduction liquid mixing tank (20) and the spray device (23), and a necessary cock. It basically consists of a pipe and a discharge pipe.

The volume reducing liquid tank (21) is equipped with a heater (26) for heating the volume reducing liquid. Since this volume reducing device is operated while being heated and kept at about 40 ° C. to 80 ° C., usually about 60 ° C., the spray device (2
The volume-reduced liquid sprayed from 3) is also heated. Of course, a heater is also provided in the volume reduction liquid mixing tank (20).

The volume reducing liquid of the present invention used in the volume reducing apparatus is
About 500 to 1100 g per 1 kg of expanded polystyrene,
Usually, about 800 g is consumed outside the system along with the polystyrene after volume reduction, so this consumption is due to the volume reduction liquid tank (2
Replenish from 1). The volume-reducing solution to be replenished is an O / W type emulsion solution in which the volume-reducing solution stock solution of the present invention is diluted with water, usually about 3 to 7 times, usually about 5 times.

On the other hand, the volume-reducing liquid circulated from the volume-reducing liquid recovery tank (22) tends to have a lower content of the active ingredient, especially the content of d-limonene, as compared with the volume-reducing liquid to be replenished. When it is repeatedly used several times, it is necessary to perform not only quantitative replenishment but also qualitative replenishment of replenishing the fatigue-depleted active ingredient in the volume reducing solution. Volume reduction liquid recovery tank (2
The degree of fatigue of the volume reducing solution circulated from 2), that is, the degree of decrease of the active ingredient is monitored, and the volume reducing solution containing a high concentration of the active ingredient corresponding to the decrease is replenished to the mixing tank. The degree of fatigue consumption of the used volume-reducing liquid, that is, the degree of reduction of the active ingredient is detected by the increase in the electric resistance of the used volume-reducing liquid.

A peephole (27) made of a transparent material is provided substantially at the rear end of the first reduction container (18).
Through this observation window, the degree of progress of volume reduction and the difficulty of transfer are visually observed.

The chip-shaped k-foamed polystyrene introduced into the hopper (16b) of the volume reducing device main body (17) has a cylindrical first reducing container (18) and a first volume reducing blade (18a).
Is transferred to a position below the spray device (21), where the volume-reducing liquid is sprayed, and then further transferred through the first volume-reducing container (18) to be kneaded with the volume-reducing liquid to reduce the volume. The volume reduction progresses gradually and steadily, and the expanded polystyrene, which was originally in the form of chips at the rear end of the first volume reduction container (18), is considerably reduced in volume and adheres to each other to form a lump. You can see what has changed.

Such a sticky blocky polystyrene foam is introduced into the first reduction container (18) and the second reduction container (19), where the volume reduction process is further advanced, and the second reduction container ( From the outlet (29) at the rear end of 19), a volume-reduced expanded polystyrene lump, which has been gelled like a soft confectionery of small popcorn, is discharged. The discharged expanded polystyrene block is separated from the volume-reducing liquid on, for example, a wire mesh filter and a volume-expanded expanded polystyrene discharge guide (30), and then the gel recovery can (2
Collected in 5).

[0074]

The present invention will be described in more detail with reference to the following examples. The present invention is not limited to the embodiments. Further, in the examples, a reduced-volume stock solution containing the following components was used.

Examples 1 to 3 (A) d-limonene liquid Citrus oil. (B) Emulsifier Ethylene oxide X condensate of sorbitan monooleate. (C) Fat and oil Olive oil. (D) Auxiliary sugar ester. The components of the above reduced volume stock solution were mixed in the ratios shown in Table 1.

Further, 1 kg of the expanded polystyrene molded product was crushed into small pieces having a diameter of about 0.5 cm. 2 liters of emulsion solution prepared by mixing undiluted liquid volume solution and distilled water (1: 4 by weight ratio) to crushed expanded polystyrene molded product, and kneading for 30 minutes using a kneading machine to reduce the volume. Turned into After kneading, the emulsion liquid was removed by filtration to obtain polystyrene having a reduced volume. The appearance of the emulsion liquid and the volume-reduced polystyrene were evaluated. The evaluation results are shown in Table 1. In Example 1, polystyrene has no tackiness,
The expanded polystyrene molded product had a good volume reduction. In Example 2, the emulsion was satisfactorily embodied, but the polystyrene after volume reduction showed some tackiness, but the tackiness could be easily removed by the ethanol treatment.

[0076]

[Table 1] Note 1: Even if the gelled product is picked and twisted many times, it does not stick to the hand and is easy to handle. Note 2: Completely emulsified in white. It is considered that by decolorizing citrus oil with activated carbon, only the oil component d-limonene is emulsified. Note 3: Emulsified, but separated into two layers, orange and white. Note 4: When picking or twisting a gelled product, a thread like natto is pulled and it is difficult to handle, and tackiness cannot be eliminated without ethanol treatment. Note 5: If the gelled product is picked up, it will be sticky and difficult to handle, and it cannot be removed without ethanol treatment. There is a marked stickiness.

[0077]

[Comparative Examples 1 to 7] As a comparative example, the appearance of the emulsion liquid was evaluated in the same manner as in the examples except that a reduced volume stock solution containing no fat and oil component (C) was used. It did not emulsify sufficiently compared to the examples. This means that in actual use, the volume reduction of the expanded polystyrene molded product is incomplete.

Example 4 (A) d-limonene 96.0% by weight (B ₁ ) Polyoxyethylene sorbitan monooleate (Kao Corporation Rheodor TW-0106 HLB = 10.00) 1.00% by weight (B ₂ ). Polyoxyethylene lauryl ether (Kao Corporation, Emulgen 10.8 HLB = 12.10) 3.00% by weight Added HLB 10.10 was prepared, and the volume reduction solutions of Comparative Examples 8 and 9 having the following compositions were prepared. The performance was compared. The liquid of Comparative Example 8 contained a large amount of the surfactant to reduce the volume of the expanded polystyrene, and thus remained in a large amount after the volume was reduced, and also worked to delay the volume reduction rate. The volume reducing liquid of Comparative Example 9 did not become a clean milky emulsion,
The volume-expanded polystyrene foam effluent became a fairly solid mass. On the other hand, the liquid of Example 4 has an emission standard of 3 ppm.
Since it does not contain the following ethanolamine, it has complete biodegradability and is suitable for volume reduction.

Comparative Example 8 (A) d-limonene 93.85 wt% (B ₁ ) Poly (6) oxyethylene sorbitan monooleate (Reodol TW-0106 HLB = 10.00) 5.00 wt% (B) ₂ ) Polyoxyethylene lauryl ether (Kao Corporation Emulgen 108 HLB = 12.10) 1.00 wt% (C) Ethanolamine 0.15 wt% Additive HLB 10.525 (Comparative Example 9) (A) d -Limonene 96.0% by weight (B ₁ ) Poly (20) oxyethylenesorbitan monooleate (Tween 80 HLB = 15) 3.0% by weight (B ₂ ) polyoxyethylene lauryl ether (Emulgen 108 HLB = Kao Corporation) 12.10) 1.00% by weight added HLB 14.275

[0079]

Example 5 (A) d-limonene 88.5 wt% (B ₁ ) polyoxyethylene sorbitan monostearate (Kao Corporation Rheodor TW-O106) 5.0 wt% (B ₂ ) polyoxyethylene lauryl ether (Kao Corporation Emulgen 108) 5.0 wt% (C) Diethanolamine palmitate 1.5 wt% was prepared and used for volume reduction. As with the composition of Example 4, good results were obtained.

[0080]

Example 6 (A) d-limonene 90.0% by weight (B ₁ ) poly (6) oxyethylene nonylphenol (Emulgen 106 Kao Corporation) 6.1% by weight (B ₂ ) poly (9) oxyethylene nonylphenol (Kao Corporation Emulgen 109P) 2.5 wt% (B ₃₎ dioctyl sulfosuccinate (Kao Corporation Pelex OT-P) 1.4 wt% were prepared and subjected to use for volume reduction. As with the composition of Example 4, good results were obtained.

[0081]

As is clear from the above specific and detailed description, the volumetric undiluted solution of expanded polystyrene of the present invention has high solubility in expanded polystyrene and can easily form an O / W type emulsion solution. . For this reason, the bulky and lightweight waste is easily dispersed in the O / W type emulsion and brought into contact with the reduced volume stock solution without being crushed in the liquid with an agitator or the like more than necessary, so that its high solubility The effect is that the foamed portion can be quickly destroyed together. Further, it is possible to easily obtain a reusable polystyrene block because it is possible to easily take out white finely foamed polystyrene, which is further reduced in volume and is free from stains, as a solid matter having low viscosity, to the outside of the system. It is possible and the economic effect of the work is remarkable.

Since the volume-reduced liquid stock solution of the present invention has no toxicity, the operator can safely carry out the volume-reduction treatment. In addition, since the main component of the reduced-volume liquid stock solution of the present invention is d-limonene liquid, which is a natural product, it has high biodegradability and does not pollute the environment when it is treated as a waste liquid. That is, the use of the undiluted solution of the volume reducing solution of the present invention allows the volume reduction work of expanded polystyrene to be carried out easily and safely, so that the practical effect is great.

[0083]

[Brief description of drawings]

FIG. 1 is an explanatory view showing one specific example of a volumetric reduction device for expanded polystyrene.

FIG. 2 is an explanatory diagram showing an example of a main structure inside a volume reducing device.

[Explanation of symbols]

 1 Expanded polystyrene molded product 2 Crushing unit 3 Input port 4 Crushing drum 5 Bar 6 Primary crushing roller 7 Secondary crushing roller 8 Screw conveyor 9 Flexible tube 10 Storage tank 11 Motor 12 Level sensor 13 Level sensor 14 Screw conveyor 15 Flexible tube 16b Hopper 17 Volume reduction device main body 18 First volume reduction container 18a First volume reduction blade 19 Second volume reduction container 19a Second volume reduction blade 20 Volume reduction liquid mixing tank 21 Volume reduction liquid tank 22 Volume reduction liquid recovery tank 23 Spray device 25 Gel collection can 26 Heater 29 Discharge port 30 Discharge guide

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[Procedure amendment]

[Submission date] December 15, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of drawings]

FIG. 1 is an explanatory view showing one specific example of a volumetric reduction device for expanded polystyrene.

FIG. 2 is an explanatory diagram showing an example of a main structure inside a volume reducing device.

FIG. 3 is an explanatory view showing another example of the main structure inside the volume reducing device.

[Explanation of symbols] 1 expanded polystyrene molded product 2 crushing unit 3 input port 4 crushing drum 5 bar 6 primary crushing roller 7 secondary crushing roller 8 screw conveyor 9 flexible tube 10 storage tank 11 motor 12 level sensor 13 level sensor 14 screw Conveyor 15 Flexible tube 16b Hopper 17 Volume reduction device main body 18 First volume reduction container 18a First volume reduction blade 19 Second volume reduction container 19a Second volume reduction blade 20 Volume reduction liquid mixing tank 21 Volume reduction liquid tank 22 Volume reduction liquid recovery Tank 23 Spray device 25 Gel collection can 26 Heater 29 Discharge port 30 Discharge guide

Claims (16)

[Claims] 1. A stock solution of (A) d-limonene of 50 to 99 parts by weight, (B) 0.03 to 30.0 parts by weight of a surfactant having HLB or added HLB of 6.0 to 30.0, and if desired. (C) Contains 0.0 to 5.0 parts by weight of an auxiliary agent for stabilizing emulsion and / or preventing rough skin, and (D) if desired.
A volume-diluted undiluted solution of expanded polystyrene, which contains 30 parts by weight or less of animal and vegetable oils. 2. The surface active agent is a linear alkylbenzene sulfonate, polyoxyethylene linear or branched alkyl ether, polyoxypropylene linear or branched alkyl ether, ethylene oxide and propylene oxide. A linear or branched alkyl ether of a mixed condensate, a polyoxyethylene linear or branched alkyl ether sulfonate, a polyoxyethylene linear or branched alkyl ether phosphonate,
Polyoxyethylene linear or branched alkyl ether carboxylate, polyoxyethylene linear or branched alkyl ether carboxylic acid ester, polyoxyethylene sorbitan-fatty acid ester (ethylene oxide condensate of sorbitan fatty acid ester), 4 A surfactant selected from the group consisting of polyoxyethylene alkylphenols, polyoxyethylene alkyl and dialkyl succinic acid compounds having an ethylene oxide unit number of -50, preferably 5-20, for example polyoxyethylene dioctyl succinate. 1. A reduced volume liquid concentrate composition of expanded polystyrene according to 1. 3. (A) 50 to 99 parts by weight of d-limonene stock solution, (B) 1.0 to 30.0 parts by weight of a nonionic surfactant having an HLB value of 6.5 to 20.0, and a desired amount. (C) contains 0.0 to 5.0 parts by weight of an auxiliary agent for stabilizing emulsion and / or preventing rough skin, and (D) if desired.
The expanded polystyrene reduced-volume liquid concentrate composition according to claim 1 or 2, which comprises 30 parts by weight or less of animal or vegetable oil. 4. The reduced polystyrene according to claim 3, wherein the nonionic surfactant (B) is a polyoxyethylene sorbitan fatty acid ester or a polyoxyethylene alkyl- or alkenyl-ether. Liquid concentrate composition. 5. The polyoxyethylene sorbitan fatty acid ester in the nonionic surfactant (B) has the following chemical formula: (In the above chemical formula, R ₁ is CH ₃ (CH ₂ ) ₇ CH═CH
(CH ₂ ) ₇ -group, and a + b + c is 0, 10 or 20), which is an ethylene oxide condensate of sorbitan-monooleate, or the polyoxyethylene alkyl ether is of the general formula _{CH 3 (CH 2) 11 -O-} ( in the above chemical formula, n 4 to 50, preferably an integer of _{5~20) (CH 2 CH 2 O} ) n-H polyoxyethylene represented by A volumetric undiluted composition of expanded polystyrene according to claim 4, which is lauryl ether. 6. (A) 50 to 99 parts by weight of d-limonene stock solution, (B) 1.0 to 30.0 parts by weight of a nonionic surfactant, (C) stabilizing emulsion and / or preventing rough skin. 0.5 to 5.0 parts by weight of auxiliary agent and (D) animal or vegetable oil 0.0 to 3
0.0 parts by weight of (A) d-limonene stock solution is 9
When the amount is 5 parts by weight or more, the animal and vegetable oil (D) is not included,
When the d-limonene stock solution of (A) is 70 parts by weight or more and less than 95 parts by weight, animal or vegetable oil is contained in an amount such that the sum of the weight thereof with the d-limonene stock solution of (A) is less than 99 parts by weight. The expanded polystyrene reduced-volume liquid concentrate composition according to any one of claims 3, 4, and 5. 7. The (D) auxiliary agent contains at least one selected from the group consisting of fatty acid diethanolamine, fatty acid ethanolamine, ethanolamine, lecithin, monoglyceride, sugar ester, and fatty acid alkanolamide. A volumetric undiluted solution composition of expanded polystyrene according to claim 6. 8. The volume-diluted liquid concentrate composition of expanded polystyrene according to claim 7, wherein the d-limonene stock solution is citrus oil extracted from the juice of citrus fruit peel. 9. (A) 50 to 99 parts by weight of d-limonene stock solution, preferably 70 to 98% by weight, and (B) 1.0 to 30.0 parts by weight, preferably 1 to 2 nonionic surfactants. 0.0 to 20.0 parts by weight, and optionally (C) 0.5 to 3.0 parts by weight of an auxiliary agent for stabilizing emulsion and / or preventing skin roughness, and optionally (D).
The amount of expanded polystyrene reduced according to claim 1 or 2, characterized in that the nonionic surfactant contains 30 parts by weight or less of animal and vegetable oil, and the additive HLB value of the nonionic surfactant is in the range of 6.0 to 30.0. Liquid concentrate composition. 10. The (B) at least two nonionic surfactants are composed of a mixture of polyoxyethylene sorbitan fatty acid ester and polyoxyethylene alkyl- or alkenyl-ether. 9. A reduced-volume undiluted liquid composition of expanded polystyrene. 11. The polyoxyethylene sorbitan fatty acid ester has the following chemical formula: (In the above chemical formula, R ₁ is CH ₃ (CH ₂ ) ₇ CH═CH
(CH ₂ ) ₇ -group, and a + b + c is 0, 10 or 20), which is an ethylene oxide condensate of sorbitan-monooleate, wherein the polyoxyethylene alkyl ether has the following general formula: A polyoxyethylene lauryl ether represented by CH ₃ (CH ₂ ) ₁₁ —O— (CH ₂ CH ₂ O) n—H (wherein n is 4 to 50, preferably an integer of 5 to 20). The reduced-volume undiluted solution composition of expanded polystyrene according to claim 10, which is characterized in that 12. (A) 50 to 99 parts by weight of d-limonene stock solution, (B) 1.0 to 7.5 parts by weight of at least two nonionic surfactants, (C) emulsion stabilization and / or rough skin. Auxiliary agent for prevention 0.0 to 5.0 parts by weight and (D)
(A) d consisting of 0.0 to 30.0 parts by weight of animal and vegetable oil.
-When the limonene stock solution is 95 parts by weight or more, the animal and vegetable oil of (D) is not included, and when the d-limonene stock solution of (A) is 70 parts by weight or more and less than 95 parts by weight, the animal and vegetable oil is
Volume reduction of the expanded polystyrene according to any one of claims 9, 10 and 11, characterized in that the weight sum of (A) with the d-limonene stock solution is less than 99 parts by weight. Liquid concentrate composition. 13. As the auxiliary agent (D), fatty acid diethanolamine, fatty acid ethanolamine, ethanolamine, lecithin, monoglyceride, sugar ester,
The volumetric undiluted solution composition of expanded polystyrene according to claim 12, characterized in that at least one selected from the group consisting of fatty acid alkanolamides is contained. 14. The expanded polystyrene reduced-volume liquid concentrate composition according to claim 13, wherein the d-limonene undiluted liquid is citrus oil extracted from the juice of citrus fruit peel. 15. The volumetric undiluted solution composition of expanded polystyrene according to claim 6 or 12, wherein the animal and vegetable oil (C) is a non-drying oil or a semi-drying oil having an iodine value of 150 or less. Stuff. 16. A stock solution of reduced volume is diluted 1.5 times to 10 times with water,
The O / W emulsion diluted preferably 2 to 7 times, and more preferably 4 to 6 times is sprayed on the expanded polystyrene chips at a temperature of 10 to 80 ° C., and the expanded polystyrene chips are kneaded to reduce the volume. A method for using the stock solution of reduced volume according to any one of claims 1 to 14, which is characterized in that a foamed polystyrene is obtained. [0001]