KR20180059632A - Functional masterbatch composition for photo-degradable plastic, the masterbatch and manufacturing method of thesame - Google Patents

Abstract

One embodiment of the present invention relates to a functional master batch composition for photo-degradable plastic, comprising: 10-60 wt% of a high specific gravity material having a specific gravity of 3-20, 20-75 wt% of an amorphous polypropylene resin, and 1-20 wt% of photo-degradable coating agent. Accordingly, the present invention provides a functional master batch composition for photo-degradable plastics which can enhance mixing and dispersing properties of photo-degradable components, realize excellent specific gravity control properties and processability, and contribute to maintenance of mechanical properties, a master batch manufactured therefrom and a manufacturing method of the master batch.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a functional masterbatch composition for photodegradable plastics, a masterbatch prepared therefrom, and a method for producing the masterbatch,

The present invention relates to a functional masterbatch composition for photodegradable plastics, a masterbatch prepared therefrom and a method for producing the masterbatch, and more particularly, to a functional masterbatch composition for a photolabileable plastic which is capable of imparting excellent photodegradability and specific gravity control characteristics VETIC COMPOSITIONS, MASTER BETCHES PROVIDED THEREWITH, AND METHODS OF MAKING THE SAME.

The masterbatch refers to solid phase additives used in resin products such as plastics, rubbers or elastomers. The masterbatch generally contains a high concentration of various additive components which are poorly mixed and dispersed with the resin. By injecting such a masterbatch in the production of a resin product, it is possible to increase the mixing / dispersing property of the additive component, precisely control the metering property of the compounding agent, and prevent the deterioration of the process environment due to scattering of the additive component.

On the other hand, plastic materials have contributed greatly to the industrial development with various functions and low price, while they have generated a large amount of wastes such as vinyl, styrofoam, and plastic containers, and they have been exposed to environmental hormones such as incineration or landfill, dioxins, And air pollution due to incomplete combustion of the exhaust gas.

In order to solve the problem of such plastic waste, studies have been made actively on methods of inducing natural decomposition by adding a function of decomposability together with processability, durability and mechanical properties to plastic.

For example, a photodegradable plastic basically means a plastic decomposing into a low molecular weight by lowering the physical properties of the resin by breaking ultraviolet energy of the sunlight and breaking some binding sites of the polymer. In general, a photocatalytic plastic is prepared by blending a UV stabilizer and a photodegradation activator into a resin composition, thereby controlling the time required for desired photodegradation while maintaining the original physical properties.

In accordance with this tendency, it has been recently required to develop a master-batch manufacturing technique which can further improve the photodegradability of plastics, while achieving high metering while using a relatively small amount and further increasing the dispersibility of additive components .

Related prior art of the present invention is U.S.Publication No. 8563529 (Oct. 22, 2013).

One object of the present invention is to provide a functional masterbatch composition for photodegradable plastics which can improve the mixing / dispersing property of photodegradable component, realize excellent specific gravity control property and processability, and contribute to maintenance of mechanical properties, And a method for producing the same.

One embodiment of the present invention is a photolithographic process comprising 10 wt% to 60 wt% of a high boiling matter having a specific gravity of 3 to 20, 20 wt% to 75 wt% of an amorphous polypropylene resin, and 1 wt% to 20 wt% To a functional masterbatch composition for glaze plastics.

The high boiling material may be a metal compound or an inorganic compound having an average particle diameter of 10 mu m to 20 mu m.

The metal compound may include at least one selected from the group consisting of tungsten and copper.

The inorganic compound may include at least one selected from the group consisting of barium sulfate, antimony oxide and anatase type titanium oxide.

The photodegradable coating agent may include at least one selected from the group consisting of a photodegradable metal stearic acid compound and a photodegradable surfactant.

The photodegradable metal stearic acid-based compound may include at least one member selected from the group consisting of manganese stearate and cobalt stearate.

The photodegradable surfactant may include at least one selected from the group consisting of a cationic surfactant, an anionic surfactant, and an amphoteric surfactant.

The masterbatch composition may have a specific gravity of 2.5 to 10 as a whole composition.

Another embodiment of the present invention relates to a masterbatch which is a kneaded product comprising the above-mentioned functional masterbatch composition for photodegradable plastics, wherein the masterbatch is contained in the kneaded product in such a form that the photodegradable coating agent is coated on the surface of the high- .

Another embodiment of the present invention is a process for the preparation of a photoresist composition comprising 10 to 60% by weight of a high boiling matter having a specific gravity of 3 to 20, 20 to 75% by weight of an amorphous polypropylene resin and 1 to 20% ; Forming a coating layer formed of a photodegradable coating on the high-boiling material; Mixing a high boiling material having a coating layer formed on its surface with a dried amorphous polypropylene resin after drying; And injecting the kneaded material into an extruder, followed by melt-extrusion at 50 ° C to 140 ° C to produce pellets; The present invention relates to a method for producing a functional masterbatch for photodegradable plastics.

The coating layer may be formed by a direct coating method using shear heat generated by stirring a high-boiling material and a photodegradable coating agent; An aqueous liquid coating method in which a high-boiling substance is impregnated into an aqueous solution containing a photodegradable coating agent; An organic solvent phase coating method in which a high-boiling substance is impregnated into an organic solvent including a photocatalytic coating agent and a photodegradable coating agent; ≪ / RTI >

The present invention relates to a functional masterbatch composition for photodegradable plastics, which can realize excellent specific gravity control property and processability while improving the mixing / dispersing property of photodegradable component, and contributing to maintenance of mechanical properties, a masterbatch prepared therefrom, and a method for producing the same Can be provided.

1 is a flowchart showing a method of manufacturing a master vet according to an embodiment of the present invention.

One embodiment of the present invention is a photolithographic process comprising 10 wt% to 60 wt% of a high boiling matter having a specific gravity of 3 to 20, 20 wt% to 75 wt% of an amorphous polypropylene resin, and 1 wt% to 20 wt% To a functional masterbatch composition for glaze plastics.

Accordingly, the present invention can provide a functional masterbatch composition for photodegradable plastics which can improve mixing and dispersibility of photodegradable components, realize excellent specific gravity control properties and processability, and contribute to maintenance of mechanical properties.

Further, the masterbatch composition of the present invention and the masterbatch prepared therefrom are particularly excellent in photodegradability when applied to a plastic bag comprising a photodegradable film-type plastic bag, for example, a polyolefin-based or modified polyolefin-based resin as a main component, The effect of controlling the specific gravity and reducing the shrinkage ratio can be realized.

The masterbatch composition of the present invention uses an amorphous polypropylene resin as a base resin (base resin). Since the amorphous polypropylene resin has a lower molecular weight than that of general-purpose polypropylene, a synergistic effect that enhances photodegradability due to a high-boiling substance coated with a photolytic coating agent described later can be realized.

Specifically, the amorphous polypropylene resin is a homopolymer prepared from a propylene monomer; Or a copolymer of a propylene monomer and a comonomer. When such an amorphous polypropylene resin is used, miscibility with a polyolefin compound or a modified polyolefin compound used as a photolytic plastic can be improved.

In one embodiment, when a homopolymer produced from a propylene monomer is used as an amorphous polypropylene resin, for example, it is more excellent in main chain cleavage property by ultraviolet rays than in the case of using a polyethylene homopolymer resin, Can be implemented.

In another embodiment, when a copolymer containing a propylene monomer and a comonomer is used as an amorphous polypropylene resin, for example, the arrangement of the copolymer may be controlled in a random form, an alternating form, a block form or a different segment, The viscosity or physical properties of the resin (base resin) can be controlled. At this time, the comonomer may be used in an amount of 2.5 wt% to 8.5 wt% for maintaining excellent photodegradability.

The comonomer may include, for example, at least one of an? -Olefin monomer other than propylene, a diene monomer, a halogen-substituted? -Olefin monomer and a cyclic olefin monomer.

The? -olefin monomer may be, for example, ethylene, isobutylene, 1-butene, 1-pentene, 1-hexene, Methyl-1-pentene, 4-methyl-1-hexene, 5-methyl-1-butene, 1-hexene, 3,3-dimethyl-1-pentene, 3,4-dimethyl-1-pentene, 4,4-dimethyl-1-pentene or vinylcyclohexane.

The diene monomers may include, for example, 1,3-butadiene, 1,4-butadiene, 1,5-hexadiene, and the like.

The halogen-substituted? -Olefin monomers include, for example, hexafluoropropene, tetrafluoroethylene, 2-fluoropropene, fluoroethylene, 1,1-difluoroethylene, 3-fluoropropene, Fluoroethylene or 3,4-dichloro-1-butene, and the like.

The cyclic olefin monomers include, for example, cyclopentene, cyclohexene, norbornene, 5-methylnorbornene, 5-ethylnorbornene, 5-propylnorbornene, 5,6-dimethylnorbornene, .

The polypropylene resin may have a viscosity of 400 cP to 4000 cP measured at 180 캜. Within the above range, the polypropylene resin has excellent fluidity so that the masterbatch composition can exhibit excellent processability and the like.

The polypropylene resin may have a softening point of 30 ° C to 200 ° C. For example, the softening point may be from 30 캜 to 180 캜. As another example, the softening point may be 40 캜 to 150 캜. When the softening point of the polypropylene resin satisfies the above range, further excellent processability, mixing dispersibility and heat resistance can be realized.

The polypropylene resin may have a weight average molecular weight of 10,000 or more. For example, 20,000 or more. Other examples may be 20,000 to 40,000. When the weight average molecular weight of the polypropylene resin satisfies the above range, more excellent dispersibility and photodegradability can be realized.

In one embodiment, the polypropylene has a melt flow index measured under the conditions of 230 ℃, 2160g by the method of ASTM D-1238 0.30g / 10 minutes to 35g / 10 min and a density of 0.89 g / cm ³ to 0.91 g / cm < ³ > may be used. In this case, the photodegradation property of the plastic bag by the master batch can be further improved.

The polypropylene resin may comprise from 20% to 75% by weight of the total masterbatch composition. When the content of the polypropylene resin is less than 20% by weight, it is difficult to mold the master batch into pellets, and the flowability of the photodegradable plastic may be deteriorated. On the contrary, when the content of the polypropylene resin exceeds 75% by weight, the photodegradability due to the master batch is not sufficiently exhibited.

The high boiling material is a material having a specific gravity of 3 to 20, and is a metal compound or an inorganic compound. Within the specific gravity range, the masterbatch is excellent in effect of improving fluidity under injection molding conditions while realizing high strength and high cost. In addition, the masterbatch containing such a high-boiling substance is excellent in the effect of reducing the shrinkage rate when applied to the photolytic plastic, and the dimensional tolerance can be lowered by lowering the shrinkage ratio while effectively controlling the specific gravity.

Specifically, the metal compound may include at least one selected from the group consisting of tungsten and copper. In this case, the high boiling material can generate high heat (shear heat) when stirred with the photodegradable coating agent, so that the coating property can be further improved.

Specifically, the inorganic compound may include at least one selected from the group consisting of barium sulfate, antimony oxide, and anatase-type titanium oxide. In such a case, the masterbatch is excellent in reducing the shrinkage rate when applied to photodegradable plastics, and can reduce the dimensional tolerance by lowering the shrinkage rate while reducing the weight.

Barium sulfate may be, for example, precipitated barium sulfate.

The antimony oxide may, for example, be antimony trioxide.

The high boiling material may have an average particle diameter of 1 탆 to 20 탆. Within the above range, the effect of increasing the strength by the high-boiling substance is increased, and the dimensional tolerance is lowered, and the effect of preventing the aggregation of the high-boiling substance or the generation of the flow mark under the injection molding condition is more excellent.

The high boiling material may comprise from 10% to 60% by weight of the total masterbatch composition. When the content of the high-boiling substance is less than 10% by weight, the photodegradation property and the specific gravity control property due to the master batch are not sufficiently exhibited. On the other hand, when the content of the high-boiling substance is more than 60% by weight, it is difficult to form the master batch into pellets, and when applied to photodegradable plastics, aggregation and flow marks can be caused, It is possible to excessively increase the specific gravity when applied to the gum plastic.

The photodegradable coating agent may include at least one selected from the group consisting of a photodegradable metal stearic acid compound and a photodegradable surfactant. Such a photodegradable coating agent can be coated on the surface of a high-boiling substance to provide excellent photodegradation characteristics, while allowing the high-boiling substance to have excellent dispersibility in the base resin (base resin).

The photodegradable metal stearic acid-based compound may include at least one member selected from the group consisting of manganese stearate and cobalt stearate. The metal stearic acid-based compound of this example has excellent photosensitivity and is excellent in radical-forming property, so that photodegradability by the masterbatch can be improved particularly.

Specifically, when at least one selected from the group consisting of manganese stearate and cobalt stearate is used as the metal stearic acid-based compound, for example, it is possible to realize better photodegradation characteristics than when using ferric stearate, The degree of coloring can be lowered and the utilization can be further improved.

In one embodiment, the metal stearic acid-based compound may be a mixture of manganese stearate and cobalt stearate, wherein the weight ratio of manganese stearate to cobalt stearate may be from 4: 3 to 3: 4. In this case, it is possible to realize more excellent photodegradability and coatability against high-boiling matter.

The photodegradable surfactant may include at least one selected from the group consisting of a cationic surfactant, an anionic surfactant, and an amphoteric surfactant. The photodegradable surfactants of this example can enhance the photodegradability of the masterbatch, while enhancing the dispersibility of the high-boiling materials.

Cationic surfactants may include, for example, stearylamine acetate, lauryltrimethylammonium chloride, and the like.

Anionic surfactants include, for example, linear alkybenzene sulfonate (LAS), alpha-olefin sulfonate (AOS), alkyl sulfate (AS), alkanesulfonate (SAS) : Sodium alanesulfonate, alkyl ether sulfate (AES), and the like.

Amphoteric surfactants may include, for example, lauryldimethylamine oxide, laurylcarboxymethylhydroxyethylimidazoliumbetaine, and the like.

In one embodiment, when a photodegradable surfactant is used as the photodegradable coating, the photodegradable coating may comprise from 1 wt% to 15 wt% of the entire masterbatch composition. When the content of the photodegradable surfactant is less than 1% by weight, the photodegradation effect is not sufficiently exhibited, and it is difficult to prevent the layer separation due to the high specific gravity of the high-boiling substance. Conversely, when the content of the photocleavable surfactant is more than 15% by weight, it is difficult to prepare a masterbatch due to a decrease in viscosity at a high temperature, which is a characteristic of a surfactant in the production of a masterbatch. .

In one embodiment, when a photodegradable metal stearic acid-based compound is used as the photolytic coating, the photodegradable coating may comprise from 1 wt% to 20 wt% of the entire masterbatch composition. When the content of the metal stearic acid-based compound is less than 1% by weight, the photodegradation effect is not sufficiently exhibited and uniform dispersion of the high-boiling substance is difficult. On the other hand, when the content of the metal stearic acid-based compound exceeds 20%, red or yellow derived from a metal substance is darkly expressed in the compound, which hinders the production of a transparent product, resulting in lower utilization.

The masterbatch composition may have a specific gravity of 2.5 to 10 as a whole composition. In this case, the master batch can provide both excellent specific gravity control characteristics and mixed dispersibility to high-boiling materials when applied to the production of photolithographic plastic bags.

Another embodiment of the present invention relates to a master batch which is a kneaded product comprising the functional masterbatch composition for photolytic plastic as described above. The master batch is contained in the kneaded product in the form that the photodegradable coating agent is coated on the surface of the high boiling material. Such a master batch can increase the strength and reduce the shrinkage rate while controlling the specific gravity of the photodegradable plastic, and can further improve the photodegradability and workability. In addition, since the photodegradable coating agent is contained in the masterbatch in a state of being coated on the surface of the high-boiling substance, the mixing and dispersing properties of the photodegradable component and the high-boiling substance are enhanced to form a flow mark in the production of the photodegradable plastic, And functions as a dispersion base for promoting photodegradability, thereby improving the photodegradability while maintaining the durability of the product.

Another embodiment of the present invention is a process for the preparation of a photoresist composition comprising 10 to 60% by weight of a high boiling matter having a specific gravity of 3 to 20, 20 to 75% by weight of an amorphous polypropylene resin and 1 to 20% ; Forming a coating layer formed of a photodegradable coating on the high-boiling material; Mixing a high boiling material having a coating layer formed on its surface with a dried amorphous polypropylene resin after drying; And injecting the kneaded material into an extruder, followed by melt-extrusion at 50 ° C to 140 ° C to produce pellets; The present invention relates to a method for producing a functional masterbatch for photodegradable plastics.

In the metering step, 10 wt% to 60 wt% of a high boiling matter having a specific gravity of 3 to 20, 20 wt% to 75 wt% of an amorphous polypropylene resin, and 1 wt% to 20 wt% of a photodegradable coating agent are respectively weighed. Within the above content range, the amorphous polypropylene resin, the high-boiling substance and the photodegradable coating agent act together to increase the effect of controlling the specific gravity and reducing the shrinkage ratio.

The coating layer may be formed by a direct coating method using shear heat generated by stirring a high-boiling material and a photodegradable coating agent; An aqueous liquid coating method in which a high-boiling substance is impregnated into an aqueous solution containing a photodegradable coating agent; An organic solvent phase coating method in which a high-boiling substance is impregnated into an organic solvent including a photocatalytic coating agent and a photodegradable coating agent; ≪ / RTI > In this case, the coating property and the coating uniformity of the photodegradable coating agent to the high-boiling substance can be increased.

In the step of preparing the kneaded product, the weighed polypropylene resin is put into a stirrer, and a high-boiling substance having a coating layer formed thereon is added while stirring at 100 rpm to 450 rpm, followed by kneading.

The stirring temperature may be, for example, from 35 캜 to 50 캜. Within this range, the mixing and dispersing property of the polypropylene resin and the high-boiling substance in which the coating layer is formed can be improved, and the aggregation or aggregation of the high-boiling substance can be further reduced

In the step of producing the pellets, the kneaded product is put into a uniaxial extruder, and melt-extruded at 40 to 150 ° C, followed by cutting to produce pellets. In this case, not only the compatibility is excellent, but also the dispersibility of the master batch can be further improved.

Example

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It should be understood, however, that this is provided as illustrative of the present invention and is not to be construed as limiting the invention in any way.

The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

The components used in the examples of the present invention are as follows.

(Suzy)

Amorphous polypropylene resin: CFR Co., Ltd., Japan, TFC730-1 (viscosity: 400-4000 cP / 180 占 폚, softening point: 110-150 占 폚).

(High-boiling matter)

Barium sulfate: Cotts Co., Ltd., Precipitated barium sulfate KCB-8000,

Antimony oxide: Ilsung Chemical Co., Ltd. Antimony trioxide,

Tungsten: Sibelco Korea, Tungsten compound

(Photodegradable coating agent)

Mn-st: Manganese stearate, China Hansung plastic additives

Co-st: Cobalt stearate, China Hansung plastic additives

Anionic surfactant: Sema, AS-550

Example 1

The content of amorphous polypropylene resin, high-boiling substance and photodegradable coating agent was measured according to the composition shown in Table 1 below. A high-boiling substance and a photodegradable coating agent were put into a dry mixer (Henschel mixer) at room temperature and stirred, and a photolytic coating agent was formed on the high-boiling substance layer to a sufficient degree by the generated magnetism. Next, the amorphous polypropylene resin was charged, and then melt mixed using a single extruder to prepare a master batch. At this time, the barrel of the single extruder was used in which the temperature was adjustable in six parts, and the temperature ranged from 80 ° C to 140 ° C. The extruded resin mixture was cooled in cooling water and then cut into pellets.

Examples 2 to 9

Master vetch pellets were prepared in the same manner as in Example 1, except that the content of the amorphous polypropylene resin, the high-boiling substance and the photodegradable coating agent were changed as shown in Table 1 below.

(weight%) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Suzy Amorphous polypropylene resin 73 73 73 73 73 73 65 65 65 High-boiling matter
Barium sulfate 20 20 0 0 0 0 20 0 0 tungsten 0 0 20 20 0 0 0 20 0 Titanium oxide 0 0 0 0 20 20 0 0 20
Photodegradable coating agent Mn-st 7 4 7 4 7 4 0 0 0 Co-st 0 3 0 3 0 3 0 0 0 Anionic surfactant 0 0 0 0 0 15 15 15

Comparative Examples 1 to 6

The same method compound pellets were prepared except that HDPE was used instead of polypropylene resin in Example 1 and the content of the photodegradable coating agent was changed as shown in Table 2 below.

(Parts by weight) Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 HDPE 100 100 100 100 100 100 Co-st 0.04 0.07 0.1 0 0 0 Mn-st 0 0 0 0.04 0.07 0.1

≪ Evaluation of physical properties &

The master pellet prepared in the above Example and the compound pellets prepared in the Comparative Example were added to the high density polyethylene resin having a density of 0.945 g / cm < ³ > and a melt flow index of 0.08 g / 10 min, Film type specimen with a thickness of 25 ㎛ was manufactured by using an uniaxial hollow film molding machine controlled at a temperature of from 200 캜 to 200 캜 by using an injection machine set at the same temperature condition. Further, an injection sample having a thickness of 1 mm was further prepared to confirm the dispersibility according to the flow of the master batch.

The specimens were measured for dispersibility, flow-mark evaluation, elongation, photodegradability and the like in the following Tables 2 to 4 (Examples 10 to 27 and Comparative Examples 8 to 12).

(1) Method of evaluating the dispersibility: The film-like specimen (thickness: 25 mu m) prepared in Examples and Comparative Examples was visually observed for the presence or absence of agglomerates to evaluate the dispersibility.

&Amp; cir & & cir &: No dispersion failure (agglomerate) was visually observed.

X: Disorientation (agglomerate) was found visually.

(2) Evaluation of spiral mark: Examples and comparative examples The photodegradable plastic injection specimen (thickness: 1 mm) produced was visually observed for the occurrence of flow marks.

&Amp; cir &: No flow marks were found in the naked eye.

?: A flow mark having a long diameter of 10 mm or less was visually observed.

X: Flow marks with a long diameter exceeding 10 mm were visually observed.

(3) Evaluation of photodegradability: The photodegradation degree by the ultraviolet lamp was measured as elongation in the MD direction for each of the specimens, according to the methods of ASTM D-4329 and ASTM D-882 for the specimens. In the photolysis measurement method, the specimen was irradiated with ultraviolet rays at 60 ° C for 4 hours and condensed with water at 40 ° C for 4 hours to form a film-wetting cycle. The greater the degree of degradation of the specimen, the lower the elongation value in a short time. (Relative Photodegradation:?>?> X)

Master batch Master batch content HDPE content Dispersibility evaluation Flow Mark Evaluation Photodegradability Example 10 Example 1 0.5 99.5 ◎ ◎ ◎ Example 11 Example 2 0.5 99.5 ◎ ◎ ◎ Example 12 Example 3 0.5 99.5 ◎ ◎ ◎ Example 13 Example 4 0.5 99.5 ◎ ◎ ◎ Example 14 Example 5 0.5 99.5 ◎ ◎ ◎ Example 15 Example 6 0.5 99.5 ◎ ◎ ◎ Example 16 Example 7 0.5 99.5 ◎ ◎ ◎ Example 17 Example 8 0.5 99.5 ◎ ◎ ◎ Example 18 Example 9 0.5 99.5 ◎ ◎ ◎ Example 19 Example 1 One 99 ◎ ◎ ◎ Example 20 Example 2 One 99 ◎ ◎ ◎ Example 21 Example 3 One 99 ◎ ◎ ◎ Example 22 Example 4 One 99 ◎ ◎ ◎ Example 23 Example 5 One 99 ◎ ◎ ◎ Example 24 Example 6 One 99 ◎ ◎ ◎ Example 25 Example 7 One 99 ◎ ◎ ◎ Example 26 Example 8 One 99 ◎ ◎ ◎ Example 27 Example 9 One 99 ◎ ◎ ◎ Comparative Example 7 Comparative Example 1 0.5 99.5 ◎ ◎ X Comparative Example 8 Comparative Example 2 0.5 99.5 ◎ ◎ X Comparative Example 9 Comparative Example 3 0.5 99.5 ◎ ◎ Δ Comparative Example 10 Comparative Example 4 0.5 99.5 ◎ ◎ X Comparative Example 11 Comparative Example 5 0.5 99.5 ◎ ◎ X Comparative Example 12 Comparative Example 6 0.5 99.5 ◎ ◎ Δ

Elongation (%) Ultraviolet irradiation time (h) 0 12 24 36 48 60 84 Example 10 250 140 80 60 0 0 0 Example 11 240 120 50 20 0 0 0 Example 12 240 100 40 20 0 0 0 Example 13 260 120 20 10 0 0 0 Example 14 250 110 70 0 0 0 0 Example 15 250 110 50 0 0 0 0 Example 16 240 210 170 90 60 0 0 Example 17 250 180 140 90 55 0 0 Example 18 260 160 130 85 45 0 0 Example 19 260 150 50 0 0 0 0 Example 20 250 120 30 0 0 0 0 Example 21 250 140 30 0 0 0 0 Example 22 240 130 20 0 0 0 0 Example 23 250 110 0 0 0 0 0 Example 24 260 110 0 0 0 0 0 Example 25 240 220 140 55 0 0 0 Example 26 240 160 120 40 0 0 0 Example 27 260 160 80 10 0 0 0 Comparative Example 7 240 220 180 130 90 70 35 Comparative Example 8 240 190 110 95 60 20 0 Comparative Example 9 250 150 85 60 15 0 0 Comparative Example 10 260 210 170 110 80 30 15 Comparative Example 11 240 170 120 85 55 15 0 Comparative Example 12 250 180 90 50 15 0 0

Photodegradation (%) Ultraviolet irradiation time (h) 0 12 24 36 48 60 84 Example 10 0.00 44.00 68.00 76.00 100.00 100.00 100.00 Example 11 0.00 50.00 79.17 91.67 100.00 100.00 100.00 Example 12 0.00 58.33 83.33 91.67 100.00 100.00 100.00 Example 13 0.00 53.85 92.31 96.15 100.00 100.00 100.00 Example 14 0.00 56.00 72.00 100.00 100.00 100.00 100.00 Example 15 0.00 56.00 80.00 100.00 100.00 100.00 100.00 Example 16 0.00 12.50 29.17 62.50 75.00 100.00 100.00 Example 17 0.00 28.00 44.00 64.00 78.00 100.00 100.00 Example 18 0.00 38.46 50.00 67.31 82.69 100.00 100.00 Example 19 0.00 42.31 80.77 100.00 100.00 100.00 100.00 Example 20 0.00 52.00 88.00 100.00 100.00 100.00 100.00 Example 21 0.00 44.00 88.00 100.00 100.00 100.00 100.00 Example 22 0.00 45.83 91.67 100.00 100.00 100.00 100.00 Example 23 0.00 56.00 100.00 100.00 100.00 100.00 100.00 Example 24 0.00 57.69 100.00 100.00 100.00 100.00 100.00 Example 25 0.00 8.33 41.67 77.08 100.00 100.00 100.00 Example 26 0.00 33.33 50.00 83.33 100.00 100.00 100.00 Example 27 0.00 38.46 69.23 96.15 100.00 100.00 100.00 Comparative Example 7 0.00 8.33 25.00 45.83 62.50 70.83 85.42 Comparative Example 8 0.00 20.83 54.17 60.42 75.00 91.67 100.00 Comparative Example 9 0.00 40.00 66.00 76.00 94.00 100.00 100.00 Comparative Example 10 0.00 19.23 34.62 57.69 69.23 88.46 94.23 Comparative Example 11 0.00 29.17 50.00 64.58 77.08 93.75 100.00 Comparative Example 12 0.00 28.00 64.00 80.00 94.00 100.00 100.00

As can be seen from Tables 2 to 4, the photodegradable plastic including the master batch of the embodiment has excellent photodegradability and can increase the strength and the shrinkage ratio while controlling the specific gravity, And workability, and the effect of contributing to maintenance of mechanical properties was excellent.

On the other hand, the photodegradable plastic made of the compound of the comparative example has low photodegradability.

Claims (10)

A functional masterbatch composition for photodegradable plastics comprising 10 wt% to 60 wt% of a high boiling material having a specific gravity of 3 to 20, 20 wt% to 75 wt% of an amorphous polypropylene resin, and 1 wt% to 20 wt% .
The method according to claim 1,
Wherein the high boiling material is a metal compound or an inorganic compound having an average particle diameter of 10 to 20 占 퐉,
Wherein the metal comprises at least one member selected from the group consisting of tungsten and copper, and the inorganic compound is at least one selected from the group consisting of barium sulfate, antimony oxide and anatase type titanium oxide, Composition.
The method according to claim 1,
Wherein said photodegradable coating agent comprises at least one selected from the group consisting of a photodegradable metal stearic acid compound and a photodegradable surfactant.
The method of claim 3,
Wherein the photodegradable metal stearic acid-based compound comprises at least one member selected from the group consisting of manganese stearate and cobalt stearate,
Wherein the photodegradable surfactant comprises at least one member selected from the group consisting of a cationic surfactant, an anionic surfactant and an amphoteric surfactant.
The method according to claim 1,
Wherein the masterbatch composition has a specific gravity of 2.5 to 10 as a whole.
A master batch, which is a kneaded product comprising the functional masterbatch composition for photolytic plastic according to any one of claims 1 to 5,
A functional masterbatch for photodegradable plastics, wherein the photodegradable coating agent is contained in the kneaded product in a form coated on the surface of a high boiling point material having a specific gravity of 3 to 20.
Measuring 10 wt% to 60 wt% of the high boiling matter having a specific gravity of 3 to 20, 20 wt% to 75 wt% of the amorphous polypropylene resin, and 1 wt% to 20 wt% of the photodegradable coating agent;
Forming a coating layer formed of a photodegradable coating on the high-boiling material;
Mixing a high boiling material having a coating layer formed on its surface with a dried amorphous polypropylene resin after drying; And
Adding the kneaded material to an extruder, and melt-extruding the kneaded material at 50 ° C to 140 ° C to produce pellets; Wherein the method comprises the steps of: preparing a functional masterbatch for photodegradable plastics;
8. The method of claim 7,
The coating layer may be formed by a direct coating method using shear heat generated by stirring a high-boiling material and a photodegradable coating agent; An aqueous liquid coating method in which a high-boiling substance is impregnated into an aqueous solution containing a photodegradable coating agent; An organic solvent phase coating method in which a high-boiling substance is impregnated into an organic solvent including a photocatalytic coating agent and a photodegradable coating agent; Wherein the functional masterbatch comprises at least one of the following components:
8. The method of claim 7,
Wherein the high boiling material is a metal compound or an inorganic compound having an average particle diameter of 10 to 20 占 퐉,
Wherein the metal comprises at least one member selected from the group consisting of tungsten and copper, and the inorganic compound is at least one selected from the group consisting of barium sulfate, antimony oxide and anatase type titanium oxide, ≪ / RTI >
8. The method of claim 7,
Wherein the photodegradable coating agent comprises at least one selected from the group consisting of a photodegradable metal stearic acid compound and a photodegradable surfactant,
Wherein the photodegradable metal stearic acid-based compound comprises at least one member selected from the group consisting of manganese stearate and cobalt stearate,
Wherein the photodegradable surfactant comprises at least one selected from the group consisting of a cationic surfactant, an anionic surfactant and an amphoteric surfactant.

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