KR101895793B1 - Catalysts composition for decomposing plastics and preparation method thereof - Google Patents

Abstract

More particularly, the present invention relates to a method for producing a plasticizer and a method for producing the same. More specifically, the present invention relates to a novel plasticizer and a method for producing the same, Methyl salicylic acid and a process for producing the same. The decomposition catalytic agent according to the present invention is used for various kinds of plastic raw materials, and biodegradation and photodegradation are simultaneously produced in the plastic product to be produced, so that the decomposition period can be controlled as well as the decomposition efficiency at the time of embedding is improved. It is possible to make it happen.

Description

TECHNICAL FIELD The present invention relates to a catalyst for decomposing plastics and a method for preparing the same,

More particularly, the present invention relates to a novel complex decomposing catalyst for plastics and a method for preparing the same, and more particularly, to a method for producing a complex decomposition catalyst for plastics, which comprises at least one photocatalyst selected from the group consisting of iron, zinc, manganese and titanium, , Glycerin and methyl salicylic acid, and a process for producing the same.

In the latter half of the 20th century, rapid industrial development has led to mass production and mass consumption. In particular, synthetic polymer plastics among petrochemical products are widely used as packaging materials for life because of their excellent physical properties and cheap and light characteristics. However, , There is an increasing interest in the disposal of waste products because they are not decomposed naturally in a reasonable period of time.

Conventionally, as a method for treating plastic waste, methods such as landfilling, incineration and recycling have been adopted. However, in the case of landfilling, ordinary plastics are not decomposed by microorganisms, Incineration involves secondary pollution by combustion residues and toxic gases. On the other hand, in the case of recycling, there is a difficulty in classification and classification according to the kind of material, and there is a problem that economic loss due to collection, transportation, and reprocessing is great.

Biodegradation is decomposition of plastics by microorganisms, and photodegradation refers to degradation of molecular weight caused by sunlight.

The first biodegradable plastics were a mixture of partially biodegradable starch and non-biodegradable polyolefin. These plastics can not be used in waste treatment facilities such as composting processes and are generally treated in sanitary landfills.

U.S. Patent No. 4,873,270 to Aime et al. Describes a mixture of carbohydrates and polyurethanes such as poly (vinyl chloride) and potato flour and is described in U.S. Patent No. 3,850,862 to Clendining et al. And 3,850,863 disclose a mixture of an oxalkanoyl polymer such as a polyalkylene polymer such as poly (alkylene adipate) or poly (caprolactone) and a natural biodegradable product such as bark, protein, starch, Lt; / RTI > For improved biodegradable plastic compositions there are U.S. Patent No. 5,314,754 and German Patent Application No. 4404840.

U.S. Patent No. 5,384,183, filed by Novacor Chemicals, and U.S. Patent No. 5,096,941, filed by Dow Chem., Disclose that photopolymerizable additives such as polyethylene are added to general plastics such as polyethylene in order to cause photodegradation by sunlight in an atmospheric environment Discloses a photodegradable film formed by the above method.

However, most of the conventional degradable plastics, including the degradable plastics produced using the above-mentioned starch and aliphatic polyester, are not only difficult to control the decomposition rate, but also have a disadvantage that the decomposition rate is slow and the material of the applied plastic is extremely limited .

It is an object of the present invention to provide a new plastic decomposition accelerator capable of decomposing a plastic product manufactured using various kinds of plastic raw materials in a short time, .

Accordingly, an object of the present invention is to provide a photocatalyst which comprises at least one photodegradation activator selected from the group consisting of metals of iron, zinc, manganese and titanium, calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid methyl salicylic acid), and a process for producing the same.

In order to accomplish the above object, the present invention provides a photocatalyst comprising at least one photodegradation activator selected from the group consisting of iron, zinc, manganese and titanium metals, calcium carbonate, stearic acid, acetylacetonate, glycerin, A plastic decomposition catalyst comprising methyl salicylic acid is provided.

The present invention also relates to a photocatalyst comprising at least one photodegradation activator selected from the group consisting of metals of iron, zinc, manganese and titanium, calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid and additionally polyethylene glycol, Sorbitol and benzoyl peroxide. The present invention also provides a plastic decomposition catalyst comprising at least one selected from the group consisting of sorbitol and benzoyl peroxide.

The present invention also relates to a process for preparing a photoresist composition comprising i) preparing a raw material for preparing at least one photocatalyst selected from the group consisting of iron, zinc, manganese and titanium, calcium carbonate, stearic acid, acetylacetonate, glycerin and methylsalicylic acid; And ii) a step of adding a photocatalyst, calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid to the agitator sequentially or simultaneously and mixing.

The present invention also relates to a process for the preparation of a photoresist composition comprising i) at least one photodegradation activator selected from the group consisting of metals of iron, zinc, manganese and titanium, calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid and additionally polyethylene glycol, A benzoyl peroxide, and a benzoyl peroxide; And ii) at least one selected from the group consisting of a photo-decomposing activator, calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid, and additionally polyethylene glycol, sorbitol and benzoyl peroxide, And a step of preparing a plastic decomposition catalyst.

In addition, the present invention provides a degradable plastic composition prepared by adding the plastic decomposition catalyst according to the present invention to a plastic raw material.

The plastic decomposition promoter according to the present invention can quickly decompose a plastic product produced by using various kinds of plastic raw materials such as synthetic resin or natural resin and adjust the decomposition time by controlling the addition amount thereof Do.

According to the present invention, biodegradation and photodegradation can occur at the same time, so that a plastic product having excellent decomposability at the time of filling can be produced, and the decomposition period can be controlled, so that decomposition can be performed according to the life of the product.

Hereinafter, the present invention will be described in detail.

In the following description of the present invention, a detailed description of known configurations and functions will be omitted.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and should be construed in accordance with the technical meanings and concepts of the present invention.

The present invention relates to a photoresist composition comprising at least one photodegradation activator selected from the group consisting of iron, zinc, manganese and titanium metals, calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid, To provide a plastic decomposition catalyst.

Wherein the plastic decomposition catalyst comprises 40 to 60 parts by weight of a photo decomposition activator, 5 to 15 parts by weight of calcium carbonate, 5 to 15 parts by weight of stearic acid, 5 to 15 parts by weight of acetylacetonate, 5 to 15 parts by weight of glycerin, By weight, and 5 to 15 parts by weight of methylsalicylic acid.

The photodegradation activator is a component added to decompose the polymer chains to decompose them. As a general oxidation promoter, a metal such as iron (Fe), zinc (Zn), manganese (Mn), titanium May be used. The decomposition may be added to the composition by the metal itself, or may be added in the form of an organic complex bonded with an organic compound. For example, an organic compound such as an alkyl dithiophosphate, an alkyl dithiocarbamate, a ketone, a thioketone, a xanthate and a phosphorus compound (for example, Phophoric, Phosphorus ester, Phosphorus amide) Lt; RTI ID = 0.0 > complex. ≪ / RTI > May be added in the form of an organic complex bonded with an organic compound. An example of such an organic compound may be represented by the following general formula.

In the above formulas, R ₁ to R ₄ each represent an alkyl, aralkyl or aryl group substituted with hydrogen, an alkyl group, an aralkyl group, an aryl group, a nitrogen, a sulfur, a phosphorus or a heterocyclic ring, A heterocyclic ring compound substituted with nitrogen, sulfur or phosphorus.

The photodegradation activator is preferably added in an amount of 5 to 5000 ppm (when the organic complex with an organic compound is added, the addition amount is based on the amount of the metal component). In particular, Since it can be adjusted differently depending on the addition amount of the activator, it is possible to control the decomposition and decomposition induction time of the polymer when it is added to the plastic in a certain ratio, so that the life of the plastic can be controlled.

That is, if the expected cycle of the plastic product is short, the photodegradation activator is added at an increased rate to start the photodecomposition at an early stage, and if the expected cycle of the plastic product is long, nickel (Ni) The ultraviolet stabilizer which is a metal component such as cobalt (Co), copper (Cu), calcium (Ca) and cadmium (Cd) can be added.

The calcium carbonate is added for the purpose of shortening the decomposition time of the plastic by increasing the contact area with oxygen during the oxidative decomposition of the plastic while slowly reacting with the surrounding water. If the amount of calcium carbonate added is less than 5 parts by weight based on 100 parts by weight of the total composition, there is a problem in that the decomposition time of the waste plastic product is delayed. When the amount of calcium carbonate is more than 15 parts by weight, However, there is a problem that pelletization of plastic is not easy.

The stearic acid has an unsaturated group and is automatically oxidized to promote initial decomposition of the plastic product. When the amount of the stearic acid added is less than 5 parts by weight based on 100 parts by weight of the total composition, the decomposition time of the plastic product is delayed However, if the addition amount exceeds 15 parts by weight, the durability of the plastic product may deteriorate.

The acetylacetonate is an additive for decomposing an unstable molecule into water easily. The acetylacetonate serves to enhance the physical properties within a period of use and to destroy the polarity of the raw material at the end to accelerate decomposition. When the added amount of the acetylacetonate is less than 5 parts by weight based on 100 parts by weight of the total composition, the effect is insignificant. If the added amount exceeds 15 parts by weight, there is no further enhanced effect.

The glycerin is also used as a biodegradation material. The microorganism grows and propagates as a raw material to provide a living environment to the microorganism. The microorganism is easily adaptable to temperature, so that it is easily eroded by microorganisms in the soil and garbage, It provides conditions for When glycerin is added in an amount of less than 5 parts by weight based on 100 parts by weight of the total composition, biodegradation can not be easily performed, and when it is more than 15 parts by weight, there is no further enhanced effect.

The above-mentioned methyl salicylic acid is used as a biodegradation inducing agent. When the amount added is less than 5 parts by weight based on 100 parts by weight of the total composition, biodegradation can not be easily performed. When the amount is more than 15 parts by weight, to be.

The present invention also relates to a photocatalyst comprising at least one photocatalyst selected from the group consisting of iron, zinc, manganese and titanium, calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid, , Sorbitol, and benzoyl peroxide. The present invention also provides a plastic decomposition catalyst comprising at least one selected from the group consisting of sorbitol, sorbitol, and benzoyl peroxide.

The plastic decomposition catalyst preferably comprises 5 to 10 parts by weight of polyethylene glycol, sorbitol or benzoyl peroxide, based on 100 parts by weight of the total composition.

The polyethylene glycol and sorbitol are used as a catalyst, and serve to enhance the physical properties within the period of use, and to destroy the polarity of the raw material in the terminal period to promote decomposition. When the amount of the polyethylene glycol and sorbitol to be added is less than 5 parts by weight based on 100 parts by weight of the total composition, the effect of accelerating the decomposition is insignificant. When the amount of the polyethylene glycol and sorbitol is more than 15 parts by weight, There is no effect.

The benzoyl peroxide is used as a catalyst. The benzoyl peroxide serves to enhance the physical properties within the period of use, and to destroy the polarity of the raw material in the terminal period to promote decomposition. When the added amount of benzoyl peroxide is less than 5 parts by weight based on 100 parts by weight of the total composition, the effect of accelerating the decomposition is insignificant. When the added amount is more than 15 parts by weight, There is no.

The plastics degradation accelerator of the present invention is comparatively thoroughly decomposed and has a relatively high possibility of controlling an inductors. The structure of the plastics decomposition accelerator is mainly composed of a carbonyl group (> C = 0), a hydroxyl group (-OH), a hydroperoxide (-OOH), a carboxyl group (-COOH) and a double bond (-C = C-). In the early stage of plastic decomposition, photodegradation takes place and the polymer chain is converted into a low molecular weight hydrophilic compound And the inner structure is also loosened. In the latter period, the water is absorbed from the outside, and the surface of the waste is expanded and wetted to maximize the microbial activity, thereby finally decomposing into carbon dioxide and water.

In addition,

i) at least one photodegradation activator selected from the group consisting of iron, zinc, manganese and titanium; a raw material preparation step of preparing calcium carbonate, stearic acid, acetylacetonate, glycerin and methylsalicylic acid; And

ii) mixing the photocatalytic active agent, calcium carbonate, stearic acid, acetylacetonate, glycerin, and methyl salicylic acid in the agitator sequentially or simultaneously and mixing.

In addition,

i) at least one photodegradation activator selected from the group consisting of metals of iron, zinc, manganese and titanium, calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid and additionally polyethylene glycol, sorbitol and benzoyl peroxide Preparing at least one raw material selected from the group consisting of: And

ii) adding to the agitator at least one selected from the group consisting of a photo-decomposing activator, calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid and additionally polyethylene glycol, sorbitol and benzoyl peroxide either sequentially or simultaneously The present invention also provides a process for producing a plastic decomposition catalyst comprising

In the above production method, the kind and content of constituent components are as described above,

In the above production method, mixing through a stirrer can be carried out by raising the temperature of the high-speed stirrer to 70 to 120 ° C and then feeding the components into a high-speed stirrer at a high-speed stirrer for 2 to 10 minutes. It means about 250 ~ 1000 rpm.

In the above-mentioned production method, it is preferable that cooling is carried out when mixed thoroughly.

In the above production method, the granular raw material can be produced by further extruding with a twin-screw extruder. At this time, it is preferable to control the screw length to 40: 1, the rotation speed to 100 to 350 times / minute, and the temperature of each heating pot to be in the range of 100 to 170 DEG C, and the decomposition promoter particles can be produced by extrusion and cutting.

In addition, the present invention provides a degradable plastic composition prepared by adding the plastic decomposition catalyst according to the present invention to a plastic raw material.

The plastic raw material may be a commonly used synthetic resin, a natural resin, or a mixture thereof.

For example, the synthetic resin may be selected from polyethylene, polypropylene, polyvinyl chloride, ABS resin or polystyrene. The natural resin may be a natural resin derived from sugarcane or a mineral powder, Agricultural and marine products waste powder, and the like.

The plastic decomposition catalyst is preferably contained in an amount of 0.5 to 5 parts by weight, more preferably 1 to 3 parts by weight, based on 100 parts by weight of the total decomposable plastic composition.

The decomposition time of the finally produced plastic product can be freely controlled by adjusting the addition amount thereof in the process of producing the plastic product using the plastic decomposition catalyst. For example, in the case of the plastic product repeatedly used, It is preferable that the disintegration time can be shortened by using an excess amount in a plastic product which is used once and disused such as a disposable container or the like.

In the case of the plastic decomposition catalyst, various kinds of plastic raw materials can be used in the process of producing plastic products such as a plastic bag, a case, an envelope, a packaging film or a disposable product. The decomposition time of the waste plastic product can be easily controlled by adjusting the addition amount of the additive composition.

Hereinafter, the present invention will be described in detail with reference to Examples and Experimental Examples. However, the following Examples and Experimental Examples are merely illustrative of the present invention, and the present invention is not limited to the following Examples and Experimental Examples.

< Example  1>

A high-speed stirrer at 50 DEG C, 50 wt% of iron (Fe), 10 wt% of calcium carbonate, 10 wt% of stearic acid, 10 wt% of acetylacetonate, 10 wt% of glycerin and 10 wt% of methylsalicylic acid, The mixture was homogeneously mixed for 2 minutes and then cooled at room temperature to prepare a decomposition catalyst.

< Example  2>

A mixture of 50 wt% Fe, 10 wt% calcium carbonate, 10 wt% stearic acid, 5 wt% acetylacetonate, 5 wt% glycerin, 5 wt% methyl salicylic acid, 5 wt% polyethylene glycol, 5 wt% sorbitol, 5% by weight was added to a high-speed stirrer at 80 DEG C, and the mixture was uniformly mixed at 500 rpm for 2 minutes and then cooled at room temperature to prepare a decomposition catalyst.

< Example  3>

A high-speed stirrer at 70 ° C was charged with 70 wt% of iron (Fe), 10 wt% of calcium carbonate, 10 wt% of stearic acid, 4 wt% of acetylacetonate, 3 wt% of glycerin and 3 wt% of methylsalicylic acid, The mixture was homogeneously mixed for 2 minutes and then cooled at room temperature to prepare a decomposition catalyst.

< Example  4>

A high-speed stirrer at a temperature of 80 DEG C was charged with 30 wt% of iron (Fe), 5 wt% of calcium carbonate, 5 wt% of stearic acid, 20 wt% of acetylacetonate, 20 wt% of glycerin, The mixture was homogeneously mixed for 2 minutes and then cooled at room temperature to prepare a decomposition catalyst.

< Example  5>

A mixture of 70 wt% Fe, 10 wt% calcium carbonate, 10 wt% stearic acid, 2 wt% acetylacetonate, 2 wt% glycerin, 2 wt% methyl salicylic acid, 2 wt% polyethylene glycol, 1 wt% sorbitol, 1% by weight was added to a high-speed stirrer at 80 占 폚, homogeneously mixed at 500 rpm for 2 minutes, and then cooled at room temperature to prepare a decomposition catalyst.

< Comparative Example  1> - Acetylacetonate , Glycerin and methyl  Except salicylic acid

60 wt.% Of iron (Fe), 20 wt.% Of calcium carbonate and 20 wt.% Of stearic acid were charged into a high-speed stirrer at 80 ° C and mixed homogeneously at 500 rpm for 2 min.

< Comparative Example  2> - Acetylacetonate  except

50% by weight of iron (Fe), 10% by weight of calcium carbonate, 10% by weight of stearic acid, 15% by weight of glycerin and 15% by weight of methylsalicylic acid were put into a high-speed stirrer at 80 DEG C and then homogeneously mixed at 500 rpm for 2 minutes Followed by cooling at room temperature to prepare a decomposition catalyst.

< Comparative Example  3> - Except glycerin

50% by weight of Fe, 10% by weight of calcium carbonate, 10% by weight of stearic acid, 15% by weight of acetylacetonate and 15% by weight of methylsalicylic acid were put into a high-speed stirrer at 80 DEG C and then homogeneously mixed at 500 rpm for 2 minutes And then cooled at room temperature to prepare a decomposition catalyst.

< Comparative Example  4> - methyl  Except salicylic acid

50 wt% of iron (Fe), 10 wt% of calcium carbonate, 10 wt% of stearic acid, 15 wt% of acetylacetonate and 15 wt% of glycerin were put into a high-speed stirrer at 80 캜 and mixed homogeneously at 500 rpm for 2 minutes Followed by cooling at room temperature to prepare a decomposition catalyst.

< Experimental Example >

The physical properties and decomposition performance of each composition of the above Examples and Comparative Examples were evaluated, and the results are shown in Table 1 and Table 2, respectively. ASTM D882-83 for tensile elongation test, ASTM D4363-84 for outdoor light resistance test, ASTM D1435-85 for outdoor weatherability test, ASTM D54329-84 for accelerated light resistance test, and ASTM D2565-89 for accelerated weather resistance test. The concrete decomposition performance test method is as follows.

(a) Production of plastic film

40% by weight of LDPE, 55% by weight of LLDPE, 2% by weight of an olefin-derived polymer as a compatibilizing agent, 1% by weight of calcium stearic acid as a lubricant, 2% by weight of each of the dispersions according to the above- After the mixture was gradually mixed, the mixture was plasticized at a temperature of 250 DEG C, extruded at a pressure of 5 kg / cm &lt; 2 &gt; in a molding machine, and then cooled by a dry method to prepare a 60 mu m thick film. Was cut to 100 x 25 mm.

(b) Outdoor decomposition test

Ⓐ Produce a film, adhere it to a certain plate, and expose it to sunlight. Ⓑ Prepare tensile specimens with unexposed film, measure tensile strength and elongation, and analyze with IR spectrometer (IR). Ⓒ Take 10 minutes after exposure to sunlight to take the film at regular time intervals, prepare tensile specimens, measure the tensile strength and elongation, and measure the content of carbonyl groups in the film by IR. Ⓓ It is defined that the induction period is over when the tensile property has decreased to less than 30% of the initial value or the content of carbonyl group (C = O) has increased to more than 15%. Ⓔ Observe and record the appearance change and disappearance of the film every 24 hours from the induction cycle, and record the time to complete disappearance. 판단 Determine whether the test result matches the scheduled decomposition time and measure the error.

(c) Accelerated weathering test (including accelerated light resistance test)

Ⓐ Agitate the film under ultraviolet radiation in a weathering tester capable of UV 290 ~ 320 nm. Ⓑ From the start of the initial aging, the film is sampled at regular time intervals of 0, 24, 48, 72, 96, 120, 150, 200, 300 hours or more, tensile properties are measured, and IR analysis is performed. Ⓒ Determine the time required for the tensile characteristics to be less than 30% of the initial value, or the time for the carbonyl group content to be 15% or more, and determine the induction period, Ⓓ Observe, record, and convert into external time the appearance change, decomposition process and complete decomposition time of film in weather test machine. Ⓔ Compare the accelerated test results with the outdoor test results to check whether they match or not, and if there are differences, calculate the error amount. 조사 Check whether the test results agree with the scheduled decomposition time, and check the error.

(d) Calculate the error. If the difference from the scheduled decomposition time is large (expected decomposition time ± 15 days), investigate the cause, remove the cause, and retest. Test the new sample.

In order to evaluate the degradability, UV irradiation time of each sample was measured every 48 hours until UV irradiation time of 0 to 240 hours was reached under the conditions of UVB 313 Lamp, 5000 hours exposure, temperature 50 ± 5 ° C., And the results are shown in Tables 1 and 2, respectively. &Lt; tb &gt; &lt; TABLE &gt;

Tensile strength of the film specimen as a function of UV irradiation time (% in percent) 0 hours 48 hours 96 hours 144 hours 240 hours Example 1 100 85 58 32 10 Example 2 100 77 49 15 - Example 3 100 90 72 55 31 Example 4 100 92 70 50 25 Example 5 100 88 65 42 22 Comparative Example 1 100 100 92 82 69 Comparative Example 2 100 100 88 69 51 Comparative Example 3 100 96 85 68 53 Comparative Example 4 100 98 88 73 50

Elongation (% in%) of the film specimen as a function of ultraviolet irradiation time 0 hours 48 hours 96 hours 144 hours 240 hours Example 1 100 88 65 35 12 Example 2 100 75 42 20 - Example 3 100 92 72 51 27 Example 4 100 93 75 54 28 Example 5 100 90 68 45 22 Comparative Example 1 100 100 90 75 58 Comparative Example 2 100 100 85 68 45 Comparative Example 3 100 100 85 65 43 Comparative Example 4 100 100 88 62 40

As can be seen from the above Table 1, in Comparative Examples 1 to 4, the rate of change in tensile strength due to UV irradiation was hardly observed, whereas in Examples 1 and 2, the tensile strength tended to decrease rapidly after 48 hours , And Examples 3 to 5 showed a tendency that the tensile strength was remarkably decreased from the end of 96 hours.

Further, as can be seen from Table 2, in Comparative Examples 1 to 4, the change in the storage ratio was hardly observed by UV irradiation, whereas in Examples 1 and 2, the elongation rate rapidly decreased And Examples 3 to 5 showed a tendency that the elongation percentage was markedly decreased after 96 hours elapsed.

These results show that the decomposition degree of the plastic composition according to Examples 1 to 5 is excellent, and in particular, Examples 1 and 2 are the most excellent, and are remarkably superior to Comparative Examples 1 to 5.

Claims (12)

At least one photodegradation activator selected from the group consisting of iron, zinc, manganese and titanium, calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid ,
here,
50 parts by weight of a photo-decomposing activator, 10 parts by weight of calcium carbonate, 10 parts by weight of stearic acid, 5 to 10 parts by weight of acetylacetonate, 5 to 10 parts by weight of glycerin and 5 to 10 parts by weight of methylsalicylic acid, &Lt; / RTI &gt;
Plastics decomposition catalyst.
delete The method according to claim 1,
Further comprising polyethylene glycol, sorbitol and benzoyl peroxide,
here,
Characterized in that the amount of polyethylene glycol, sorbitol and benzoyl peroxide is 5 parts by weight, based on 100 parts by weight of the total composition,
Plastics decomposition catalyst.
delete i) at least one photodegradation activator selected from the group consisting of iron, zinc, manganese and titanium; a raw material preparation step of preparing calcium carbonate, stearic acid, acetylacetonate, glycerin and methyl salicylic acid; And
ii) mixing and stirring a photocatalytic active agent, calcium carbonate, stearic acid, acetylacetonate, glycerin, and methyl salicylic acid sequentially or simultaneously in an agitator,
here,
50 parts by weight of a photo-decomposing activator, 10 parts by weight of calcium carbonate, 10 parts by weight of stearic acid, 5 to 10 parts by weight of acetylacetonate, 5 to 10 parts by weight of glycerin and 5 to 10 parts by weight of methylsalicylic acid, And then mixing the mixture.
A method for producing a plastic decomposition catalyst.
delete 6. The method of claim 5,
Polyethylene glycol, sorbitol and benzoyl peroxide were further added and mixed,
here,
Characterized in that the amount of polyethylene glycol, sorbitol and benzoyl peroxide is 5 parts by weight, based on 100 parts by weight of the total composition,
A method for producing a plastic decomposition catalyst.
delete A process for producing a plastic raw material which is produced by adding the plastic decomposition catalyst of any one of claims 1 to 3 to a plastic raw material,
The plastic raw material is a synthetic resin, a natural resin or a mixture thereof,
Wherein the plastic decomposition catalyst comprises 2 to 5 parts by weight based on 100 parts by weight of the total decomposable plastic composition.
Decomposable plastic composition.
delete delete 10. The method of claim 9,
Wherein the degradable plastic composition is a plastic bag, a case, an envelope, a packaging film, or a disposable article.