KR101259885B1 - Impact strength improved polylactic acid and method for preparing the same - Google Patents

Abstract

The present invention relates to a polylactic acid composition comprising 100 parts by weight of a polylactic acid comprising 40 to 93% by weight of an L-optical isomer polylactic acid and 3 to 60% by weight of a D-optical isomeric polylactic acid; 3 to 30 parts by weight of at least one copolymer selected from an acrylic copolymer and a reactive acrylic copolymer; And 1 to 20 parts by weight of an organic surface-treated cinnabarin powder, wherein the composition is environmentally friendly, biodegradable, has improved impact resistance, and has a high heat distortion temperature. have.

Description

TECHNICAL FIELD The present invention relates to a polylactic acid composition having improved impact resistance and a method for producing the same. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to a poly (lactic acid) composition and a method for producing the same, and more particularly, to a poly (lactic acid) complex composition having improved impact resistance and a method for producing the same.

Recent interest in the global environment is a global warming problem due to the accumulation of carbon dioxide that accompanies depletion of fossil fuels. In order to solve this problem, researches to replace carbon-based petrochemical plastics with biodegradable plastics are actively under way.

Although the definition of biodegradable resins is not universally accepted yet, it should have the same functions (strength, water resistance, molding processability, heat resistance, etc.) as those of ordinary plastics during use. (Bacteria, fungi, etc.) that are responsible for the most basic role can be decomposed.

Poly (lactic acid) (PLA), a representative biodegradable plastic, has been widely popular recently because it is relatively low in price compared to other biodegradable materials, is easily molded, and has excellent mechanical properties. In addition, PLA has a great advantage of being biocompatible as well as being applied to plastic products as an environmentally friendly material, and is being actively used in the medical field.

However, despite its many advantages, PLA is low in impact resistance and low in thermal deformation temperature compared with petrochemical plastics. Particularly, due to the brittle nature, the impact strength is low, which limits the development of the use of automotive parts.

Accordingly, the present invention has been made in order to solve the above-mentioned problems of the prior art and the technical problems required from the past, and it is an object of the present invention to provide a biodegradable, environmentally friendly, excellent impact resistance, And to provide a poly (lactic acid) composition having a high temperature.

Another object of the present invention is to provide a process for producing a poly (lactic acid) composition which can produce the poly (lactic acid) composition in a simple manner.

It is still another object of the present invention to provide a molded article made of the above polylactic acid composition.

As a technical means for achieving the above technical object, one aspect of the present invention is a polylactic acid composition comprising 40 to 93% by weight of an L-optical isomer polylactic acid and 3 to 60% by weight of a D-optical isomeric polylactic acid 100 parts by weight; 3 to 30 parts by weight of at least one copolymer selected from an acrylic copolymer and a reactive acrylic copolymer; And 1 to 20 parts by weight of an organic surface-treated phylloidal powder.

The organic surface-treated cyanide powder may be at least one surface treating agent selected from the group consisting of fatty acids, amino acids, amides, esterified fatty acids, aliphatic amines, aromatic amines, ammonium salts, silanes, titanate coupling agents and zirconate coupling agents. It may be surface-treated.

The organic surface-treated cyanophyll powder preferably has an average size of 0.5 to 500 탆.

The acrylic copolymer may be an ethylene-butylacrylate copolymer (EBA), an ethylene-ethyl acrylate copolymer (EEA), or an ethylene-methyl acrylate copolymer (ethylene-methyl acrylate copolymer) Acrylate Copolymer (EMA)).

The reactive acrylic copolymer may be an acrylic copolymer containing at least one reactive group selected from the group consisting of a glycidyl group, an epoxy group, a carboxyl group and an amine group.

The polylactic acid composition may further comprise 3 to 30 parts by weight of an impact modifier.

The impact modifier may be at least one selected from the group consisting of a core-shell type copolymer, a chain type reinforcing agent, and combinations thereof.

The impact modifier may be one or more selected from the group consisting of an olefin impact modifier, an acrylic impact modifier, a methyl methacrylate-butadiene-styrene impact modifier, a styrene-ethylene-butadiene-styrene impact modifier, a silicone impact modifier, and a polyester elastomer impact modifier And the like.

The olefinic impact modifier may be at least one selected from the group consisting of an ethylene-propylene copolymer, an ethylene-butylene copolymer, an ethylene-hexene copolymer, an ethylene-octene copolymer and an ethylene-propylene-diene copolymer.

The polyester elastomer impact modifier may comprise polybutyl terephthalate as a hard segment and polytetramethylene oxide glycol as a soft segment.

The polylactic acid composition may further comprise an additive selected from the group consisting of an antioxidant, a release agent, a release agent, a colorant, a sunscreen agent, a nucleating agent, a plasticizer, an adhesion promoter, a pressure sensitive adhesive and a mixture thereof.

Another aspect of the present invention provides a molded article produced from the environmentally friendly poly (lactic acid) composition.

Another aspect of the present invention is a process for preparing a polylactic acid comprising the steps of: (a) mixing an L-optical isomeric polylactic acid and a D-optical isomeric polylactic acid; (B) mixing the mixture produced through the step (a) with at least one copolymer selected from an acrylic copolymer and a reactive acrylic copolymer, and a mixture obtained by the step (b) and an organically- (C) admixing the powders. The present invention also provides a method for producing an environmentally friendly poly (lactic acid) composition.

Wherein step (a) is preferably carried out by mixing an L-optical isomer polylactic acid and a D-optical isomer polylactic acid in an extruder at a temperature of 190 to 230 ° C.

The present invention can provide an environmentally friendly poly (lactic acid) composition which is biodegradable, environmentally friendly, excellent in impact resistance, and has a high flexural modulus and heat distortion temperature.

The present invention can also provide a process for producing a polylactic acid composition which can be prepared by a simple method.

Hereinafter, preferred embodiments of the polylactic acid composition with improved impact resistance according to the present invention and the method for producing the same will be described in detail with reference to the formulas.

It is to be understood, however, that the following description is not intended to limit the invention to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Furthermore, terms including an ordinal number such as first, second, etc. to be used below can be used to describe various elements, but the constituent elements are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

As a technical means for achieving the above technical object, one aspect of the present invention is a polylactic acid composition comprising 40 to 93% by weight of an L-optical isomer polylactic acid and 3 to 60% by weight of a D-optical isomeric polylactic acid 100 parts by weight; 3 to 30 parts by weight of at least one copolymer selected from an acrylic copolymer and a reactive acrylic copolymer; And 1 to 20 parts by weight of an organic surface-treated phylloidal powder.

Poly lactic acid

Poly lactic acid (PLA) is produced by the polymerization of monomeric lactic acid. Polylactic acid, which is a typical biodegradable plastic, has recently been widely recognized as being relatively low in price compared to other biodegradable materials, easy to mold, and excellent mechanical properties. In addition, PLA has a great advantage of being biocompatible as well as being applied to plastic products as an environmentally friendly material, and is being actively used in the medical field.

However, despite its many advantages, PLA is low in impact resistance and low in thermal deformation temperature compared with petrochemical plastics. Particularly, due to the brittle nature, the impact strength is low, which limits the development of the use of automotive parts.

Polylactic acid can increase the heat resistance by forming a polylactic acid stereocomplex. The polylactic acid stereocomplex is characterized by the optical isomer of lactic acid, which is the raw material of polylactic acid. Lactic acid has two optical isomers. Lactide is present as L-lactide consisting of L-form lactic acid and D-lactide composed of lactic acid only in D-form.

When the polylactic acid stereocomplex is formed, the characteristic feature is that the crystallization speed is increased and the crystal structure is dense and melting point (Tm) and heat deflection temperature (HDT) are increased. The reason for the excellent thermal properties is that when a blend of optical properties type poly (lactic acid) material is formed, solid phase crystallization proceeds in a molten state, and parallel packing of polymer chains in the crystal lattice and CH3 ... Due to the strong Van der Waals attraction between O = C, the thermal properties of the final blend material are improved. However, when a stereo complex is formed, the impact resistance may decrease.

The polylactic acid composition of the present invention comprises polylactic acid, wherein the polylactic acid comprises 75 to 95% by weight of the L-optical isomer polylactic acid and 5 to 25% by weight of the D-optical isomer, more preferably L- 85 to 92% by weight of the isomeric polyphosphoric acid and 8 to 15% by weight of the D-optical isomeric polyphosphoric acid, and the polyphosphoric acid may form a certain partial stereocomplex. When the content of the D-optical isomer polylactic acid in the polyunsaturated fatty acids of the present invention is less than 5% by weight, the formation of the stereocomplex is small and the heat resistance is decreased and the heat distortion temperature is lowered. Is more than 25% by weight, polymerization of the D-optical isomeric poly (lactic acid) is not easy, and the cost is high, which is not preferable because the economical efficiency is lowered.

The acrylic copolymer or the reactive acrylic copolymer

The polylactic acid has brittleness and poor impact resistance. In order to improve the impact resistance of polylactic acid, 3 to 30 parts by weight of at least one copolymer selected from an acrylic copolymer and a reactive acrylic copolymer excellent in compatibility with poly (lactic acid) can be used. If the content of the at least one copolymer selected from the acrylic copolymer and the reactive acrylic copolymer is less than 3 parts by weight based on 100 parts by weight of the polylactic acid, the effect of improving impact resistance is insignificant. If the content is more than 30 parts by weight, Which is undesirable.

Examples of the acrylic copolymer include an ethylene-butylacrylate copolymer (EBA), an ethylene-ethyl acrylate copolymer (EEA), and an ethylene-methyl acrylate copolymer Acrylate Copolymer, EMA) may be used alone or in combination of two or more.

As the reactive acrylic copolymer, acrylic copolymers containing at least one kind of reactive group selected from the group consisting of a glycidyl group, an epoxy group, a carboxyl group and an amine group may be used alone or in combination of two or more.

For example, a polyethylene-co-glycidyl methacrylate (EGMA) copolymer, which is an ethylene-methyl acrylate copolymer including the glycidyl group reactor, has a unique epoxy group and a hydroxyl group at the poly- Or the compatibility with the carboxyl group and hydrogen bond of the hydroxy group and the oxygen of the carbonyl group generated thereby, the impact strength can be improved.

As another example, Elvaloy represented by formula (1), which is an acrylate copolymer containing the glycidyl group, has a structure in which a bond between an inherent epoxy group and a hydroxyl group or a carboxyl group at the end of poly (lactic acid) And the impact strength can be improved.

[Chemical Formula 1]

Impact modifier

The polylactic acid composition of the present invention may further comprise 3 to 30 parts by weight of an impact modifier. The impact modifier may be a core-shell type copolymer or a chain type reinforcing agent, either alone or in combination of two or more. Although the impact modifier is more economical than the acrylic copolymer or the reactive acrylic copolymer at lower cost, there is a fear that the compatibility of the poly (lactic acid) composition of the present invention is lowered.

As the impact modifier, an olefin impact modifier, an acrylic impact modifier, a methyl methacrylate-butadiene-styrene impact modifier, a styrene-ethylene-butadiene-styrene impact modifier, a silicone impact modifier or a polyester- Two or more species can be used in parallel.

As the olefin impact modifier, an ethylene-propylene copolymer, an ethylene-butylene copolymer, an ethylene-hexene copolymer, an ethylene-octene copolymer, or an ethylene-propylene-diene copolymer may be used alone or in combination of two or more.

Polybutyl terephthalate as a hard segment and polytetramethylene oxide glycol as a soft segment may be used as the polyester elastomer impact modifier.

When the content of the impact modifier is less than 3 parts by weight with respect to 100 parts by weight of the poly (lactic acid), the degree of improvement in impact resistance is insignificant, and when the content is more than 30 parts by weight, the heat resistance may decrease.

Organicization  Surface-treated Phyllite  powder

Phyllite is a type of metamorphic rock formed by processes of hydrolysis, denaturation, weathering, and corrosion by hydrothermal alteration of clayey sedimentary layers. The phyllite powders used in the present invention are powders prepared by pulverizing domestic natural ores and classifying the powders, and the main components thereof include silica and alumina containing various kinds of metal oxides.

In addition, the phyllite rock powder has voids of various sizes inside and has porosity almost similar to that of zeolite, but has a large fraction of foams and is excellent in breathability and absorbency.

Organic surface treated cyanide powder has the effect of improving the mechanical properties by improving the compatibility with the polymer resin by introducing the organic compound on the surface.

The average size of the organophilic surface treated cinnabar powder is preferably 0.5 to 500 탆, more preferably 2 to 60 탆. If the size of the organophilic surface treated phyllite powder is small, the compatibility with the polymer resin is increased and uniformly distributed in the poly (lactic acid) composition. However, if the average size is less than 0.5 탆, it is difficult to produce by mechanical grinding, , The impact resistance is decreased, which is not preferable.

The organically modified surface treated cyanophyll powder of the present invention can be used as a surface treatment agent in the form of a surface treatment agent such as a fatty acid, an amino acid, an amide, a fatty acid amide, an esterified fatty acid, an aliphatic amine, an aromatic amine, an ammonium salt, a sulfonic acid (salt), a sulfuric acid Or a zirconate coupling agent may be used alone or in combination of two or more kinds. A fatty acid, more preferably a fatty acid having 4 to 32 carbon atoms, still more preferably stearic acid may be used. In addition, saturated or unsaturated fatty acids can be used as the fatty acid.

The fatty acid, amino acid, amide, fatty acid amide, esterified fatty acid, aliphatic amine, aromatic amine, ammonium salt, sulfonic acid (salt) or silane preferably has 4 to 32 carbon atoms as the organic surface treatment agent.

The amount of the organic surface-treated cyanide powder may be 1 to 20 parts by weight, more preferably 5 to 15 parts by weight, based on 100 parts by weight of the polylactic acid. When the amount is less than 1 part by weight, heat resistance and flexural modulus If it exceeds 20 parts by weight, the impact resistance may be lowered.

The polylactic acid composition may further comprise an additive selected from the group consisting of an antioxidant, a release agent, a release agent, a colorant, a sunscreen agent, a nucleating agent, a plasticizer, an inorganic filler, an adhesion promoter, a pressure sensitive adhesive and a mixture thereof.

Another aspect of the present invention provides a molded article produced from the environmentally friendly poly (lactic acid) composition.

Another aspect of the present invention is

(A) mixing the L-optical isomer polylactic acid with the D-optical isomer polylactic acid;

(B) mixing the mixture produced through step (a) with at least one copolymer selected from an acrylic copolymer and a reactive acrylic copolymer; and

 (C) mixing the mixture produced through the step (b) with the organophilic surface-treated cyanobacterial powder (c).

Wherein step (a), step (b) or step (c) is preferably carried out in an extruder at a temperature of 190 to 230 ° C.

In step (a), the polylactic acid is preferably blended with 40 to 93% by weight of the L-optical isomer polylactic acid and 3 to 60% by weight of the D-optical isomeric polylactic acid.

In step (b), at least one copolymer selected from an acrylic copolymer and a reactive acrylic copolymer is preferably contained in an amount of 3 to 30 parts by weight based on 100 parts by weight of the poly (lactic acid).

The cyanophyll powder subjected to the organic surface treatment in step (c) is preferably contained in an amount of 1 to 20 parts by weight based on 100 parts by weight of the poly (lactic acid).

The polylactic acid, the acrylic copolymer and the reactive acrylic copolymer used in the method for producing the polylactic acid composition, and the organophilic surface-treated phyllite powder are the same as those described in the polylactic acid composition.

Hereinafter, the structure of the present invention will be described more specifically by way of the following examples, but the present invention is not limited thereto.

[Example]

Example  One

The polylactic acid composition was prepared according to the composition ratio shown in Table 1 in the following manner.

73.6 parts by weight of the L-optical isomer polylactic acid (L-PLA) and 6.4 parts by weight of the D-optical isomer polylactic acid (D-PLA) were melt kneaded in a BA-19 BA twin screw extruder (L / D = 42, ), And the extrusion temperature was mixed at 190 to 230 캜 with a rotation speed of 200 rpm for 60 seconds. 0.1 part by weight of each of primary and secondary antioxidants was added as an additive.

10 parts by weight of poly (ethylene-co-glycidyl methacrylate) (EGMA) and 10 parts by weight of Elvaloy (DuPont) were added to the polylactic acid mixture and the extrusion temperature was 190 to 230 ° C and 200 rpm And mixed for 60 seconds at a rotating speed.

10 parts by weight of phyllotaxin powder (FR-2000S, 2,000 mesh, made by Sankyo Co., Ltd.) surface-treated with stearic acid having an average size of about 4 m was added to the above polylactic acid, EGMA and Elvaloy mixture. The extrusion temperature was 190 to 230 캜, For 60 seconds to prepare a polylactic acid composition

Example  2

A polylactic acid composition was prepared in the same manner as in Example 1, except that 68.0 parts by weight of the L-optical isomer polylactic acid and 12.0 parts by weight of the D-optical isomer polylactic acid were used, respectively.

Example  3

A polylactic acid composition was prepared in the same manner as in Example 1, except that 64.4 parts by weight of the L-optical isomer polylactic acid, 5.6 parts by weight of the D-optical isomer, and 20 parts by weight of Elvaloy were used, respectively.

Example  4

A polylactic acid composition was prepared in the same manner as in Example 1, except that 59.5 parts by weight of the L-optical isomer, 10.5 parts by weight of the D-optical isomer, and 20 parts by weight of Elvaloy were used.

Example  5

68.0 parts by weight of an L-optically isomeric polylactic acid, 12.0 parts by weight of a D-optically isomeric polylactic acid, and 50 parts by weight of phylloidal silica (FR-255S, 255 mesh, surface treated with stearic acid) , A polylactic acid composition was prepared in the same manner as in Example 1.

Example  6

68.0 parts by weight of an L-optically isomeric polylactic acid, 12.0 parts by weight of a D-optical isomer polylactic acid, and a phyllotaxane powder (FR-5,000S, 5,000 mesh, The polylactic acid composition was prepared in the same manner as in Example 1 except that

Comparative Example  One

A polylactic acid composition was prepared in the same manner as in Example 1, except that the phyllotaxin powder (FR-2000S, 2,000 mesh, available from Seiko Co., Ltd.) surface-treated with stearic acid was not used.

Comparative Example  2

A polylactic acid composition was prepared in the same manner as in Example 2, except that the phyllite powder (FR-2000S, 2,000 mesh, manufactured by Seiko Co., Ltd.) surface-treated with stearic acid was not used.

Comparative Example  3

A polylactic acid composition was prepared in the same manner as in Example 3, except that the phyllotaxel powder (FR-2000S, 2,000 mesh, available from Seiko Co., Ltd.) surface-treated with stearic acid was not used.

Comparative Example  4

A polylactic acid composition was prepared in the same manner as in Example 4, except that the phyllite powder (FR-2000S, 2,000 mesh, available from Seiko Co., Ltd.) surface-treated with stearic acid was not used.

Comparative Example  5

Except that talc powder (KCA-2000, 2000 mesh, manufactured by KOCH) having an average size of about 4 μm was used in place of cyanide powder (FR-2000S, 2,000 mesh, made by Seiko Co., Ltd.) surface-treated with stearic acid having an average size of about 4 μm , A polylactic acid composition was prepared in the same manner as in Example 1.

Comparative Example  6

Except that talc powder (KCA-2000, 2000 mesh, manufactured by KOCH) having an average size of about 4 μm was used in place of cyanide powder (FR-2000S, 2,000 mesh, made by Seiko Co., Ltd.) surface-treated with stearic acid having an average size of about 4 μm The polylactic acid composition was prepared in the same manner as in Example 2.

Comparative Example  7

Except that talc powder (KCA-2000, 2000 mesh, manufactured by KOCH) having an average size of about 4 μm was used in place of cyanide powder (FR-2000S, 2,000 mesh, made by Seiko Co., Ltd.) surface-treated with stearic acid having an average size of about 4 μm The polylactic acid composition was prepared in the same manner as in Example 3.

Comparative Example  8

Except that talc powder (KCA-2000, 2000 mesh, manufactured by KOCH) having an average size of about 4 μm was used in place of cyanide powder (FR-2000S, 2,000 mesh, made by Seiko Co., Ltd.) surface-treated with stearic acid having an average size of about 4 μm The polylactic acid composition was prepared in the same manner as in Example 4.

Izod  Strength Strength ( Notched Izod Impact Strength , IS )

Each of the samples obtained in Examples and Comparative Examples was compression-molded at 200 ° C according to the respective standards to prepare five specimens, and the specimens were tested at room temperature according to ASTM D256 using an Izod impact tester (Sejin, SJTM-131) The average value was measured and is shown in Table 2.

Flexural modulus ( Flexural Modulus , FM )

The specimens obtained in Examples and Comparative Examples were compression-molded at 200 ° C in accordance with the respective standards to prepare five specimens. Flexural modulus was measured according to ASTM D790 at room temperature using an universal testing machine (UTM, Tinius olsen, H5KT) And the average value was taken and is shown in Table 2. [

Heat distortion temperature

The specimens obtained in Examples and Comparative Examples were compression-molded at 200 ° C according to the respective standards to prepare five specimens. Heat was then heated at 2 ° C / min using an HDT tester (Tinius olsen 3-station, 303 / HDTM) , The heat distortion temperature was measured in accordance with ASTM D648, and the average value was obtained and is shown in Table 2. < tb > < TABLE >

L-PLA
(Parts by weight) D-PLA
(Parts by weight) EGMA
(Parts by weight) Elvaloy
(Parts by weight) Phyllite
FR255S
(Parts by weight) Phyllite
FR2000S
(Parts by weight) Phyllite
FR5000S
(Parts by weight) Talc
KCA2000
(Parts by weight) Example 1 73.6 6.4 10 10 - 10 - - Example 2 68.0 12.0 10 10 - 10 - - Example 3 64.4 5.6 10 20 - 10 - - Example 4 59.5 10.5 10 20 - 10 - - Example 5 68.0 12.0 10 10 10 - - - Example 6 68.0 12.0 10 10 - - 10 - Comparative Example 1 73.6 6.4 10 10 - - - - Comparative Example 2 68.0 12.0 10 10 - - - - Comparative Example 3 64.4 5.6 10 20 - - - - Comparative Example 4 59.5 10.5 10 20 - - - - Comparative Example 5 73.6 6.4 10 10 - - - 10 Comparative Example 6 68.0 12.0 10 10 - - - 10 Comparative Example 7 64.4 5.6 10 20 - - - 10 Comparative Example 8 59.5 10.5 10 20 - - - 10

Properties Izod impact strength
(J / m) Flexural modulus
(MPa) Heat deformation temperature (캜) Example 1 48 2,135 96 Example 2 51 2,175 103 Example 3 53 2,015 91 Example 4 59 1,770 98 Example 5 49 2,120 100 Example 6 52 2,190 105 Comparative Example 1 50 1,975 75 Comparative Example 2 53 1,800 85 Comparative Example 3 57 1,746 70 Comparative Example 4 61 1,432 80 Comparative Example 5 41 2,025 90 Comparative Example 6 44 1,925 98 Comparative Example 7 47 1,878 85 Comparative Example 8 52 1,549 93

Referring to Tables 1 and 2, it can be seen that the poly (lactic acid) composition of the present invention has excellent impact strength, high flexural modulus, high heat distortion temperature, and excellent thermal properties.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

Claims (18)

100 parts by weight of polylactic acid comprising 40 to 93% by weight of a polyamic acid of an L-optical isomer and 3 to 60% by weight of a poly-isomer of a D-optical isomer;
3 to 30 parts by weight of at least one copolymer selected from an acrylic copolymer and a reactive acrylic copolymer;
1 to 20 parts by weight of organophilic surface-treated phyllite powder;
Wherein the polylactic acid composition is a polylactic acid composition. The method of claim 1, wherein the organophilic surface treated cinnabar powder is selected from the group consisting of fatty acids, amino acids, amides, esterified fatty acids, aliphatic amines, aromatic amines, ammonium salts, silanes, titanate coupling agents and zirconate coupling agents Or more of the surface-treating agent. The environmentally friendly poly (lactic acid) composition according to claim 1, wherein the organophilic surface treated cinnabar powder has an average size of 0.5 to 500 μm. The acrylic copolymer according to claim 1, wherein the acrylic copolymer is an ethylene-butylacrylate copolymer (EBA), an ethylene-ethyl acrylate copolymer (EEA), and an ethylene-methyl acrylate copolymer Wherein the copolymer is at least one selected from the group consisting of ethylene-methyl acrylate copolymer (EMA). The environmentally friendly poly (lactic acid) composition according to claim 1, wherein the reactive acrylic copolymer is an acrylic copolymer comprising at least one reactive group selected from the group consisting of a glycidyl group, an epoxy group, a carboxyl group and an amine group. The environmentally friendly poly (lactic acid) composition according to claim 1, wherein the poly (lactic acid) composition further comprises 3 to 30 parts by weight of an impact modifier. The environmentally friendly poly (lactic acid) composition according to claim 6, wherein the impact modifier is at least one selected from the group consisting of a core-shell type copolymer, a chain type reinforcing agent, and combinations thereof. The impact modifier according to claim 7, wherein the impact modifier is selected from the group consisting of an olefin impact modifier, an acrylic impact modifier, a methyl methacrylate-butadiene-styrene impact modifier, a styrene-ethylene-butadiene-styrene impact modifier, a silicone impact modifier, And a reinforcing agent. ≪ RTI ID = 0.0 > 8. < / RTI > The method according to claim 8, wherein the olefinic impact modifier is selected from the group consisting of an ethylene-propylene copolymer, an ethylene-butylene copolymer, an ethylene-hexene copolymer, an ethylene-octene copolymer and an ethylene-propylene- Wherein the at least one polyol component is at least one polyol component. The environmentally friendly poly (lactic acid) composition according to claim 8, wherein the polyester elastomer impact modifier comprises poly (butyl terephthalate) as a hard segment and polytetramethylene oxide glycol as a soft segment. The polylactic acid composition according to claim 1, further comprising an additive selected from the group consisting of an antioxidant, an endurance agent, a release agent, a colorant, an ultraviolet screening agent, a nucleating agent, a plasticizer, an adhesion promoter, By weight of the polylactic acid. A molded article made from the environmentally friendly poly (lactic acid) composition according to claim 1. (A) mixing the L-optical isomer polylactic acid with the D-optical isomer polylactic acid;
(B) mixing the mixture produced through step (a) with at least one copolymer selected from an acrylic copolymer and a reactive acrylic copolymer; and
(C) mixing the mixture produced through the step (b) with the organophilic surface-treated cinnabar powder;
≪ / RTI > 14. The process according to claim 13, wherein step (a) is a step of mixing the L-optical isomer polylactic acid with the D-optical isomeric polylactic acid at an extruder at a temperature of 190 to 230 ° C. ≪ / RTI > 14. The method of claim 13, wherein the organophilic surface treated cyanophyll powder comprises one species selected from the group consisting of fatty acids, amino acids, amides, esterified fatty acids, aliphatic amines, aromatic amines, ammonium salts, silanes, titanate coupling agents and zirconate coupling agents Of the total amount of the surface-treating agent. 14. The method according to claim 13, wherein the organophilic surface treated cinnabar powder has an average size of 0.5 to 500 mu m. 14. The method of claim 13, wherein the acrylic copolymer is selected from the group consisting of an ethylene-butylacrylate copolymer (EBA), an ethylene-ethyl acrylate copolymer (EEA), and an ethylene-methyl acrylate copolymer And at least one copolymer selected from the group consisting of ethylene-methyl acrylate copolymer (EMA). 14. The method according to claim 13, wherein the reactive acrylic copolymer is an acrylic copolymer comprising at least one reactive group selected from the group consisting of a glycidyl group, an epoxy group, a carboxyl group and an amine group.