KR101675828B1 - Polyketone composition with excellent mechanical properties - Google Patents

Abstract

The present invention relates to a polyketone composition, and more particularly, to a composition comprising a polyketone polymer and an amorphous semiaromatic polyamide blended therein. In particular, the present invention relates to a polyketone composition having improved curvature characteristics when used as industrial plastics compared to conventional thermoplastic plastics .

Description

[0001] The present invention relates to a polyketone composition having excellent mechanical properties,

TECHNICAL FIELD The present invention relates to a polyketone composition having excellent mechanical properties, and more particularly, to a polyketone composition manufactured using a blend including a polyketone resin and an amorphous semiaromatic polyamide and applicable as an industrial component.

 Polyketone (PK) is a low-cost material for general engineering plastic materials such as polyamide, polyester, and polycarbonate, and has excellent properties such as heat resistance, chemical resistance, fuel permeability and abrasion resistance. . For this reason, there is a growing interest in a family of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, known as polyketones or polyketone polymers. U.S. Patent No. 4,880,903 discloses a linear alternating polyketone terpolymer consisting of carbon monoxide, ethylene and terephthalic unsaturated hydrocarbons such as propylene.

The process for preparing the polyketone polymer is generally carried out by reacting a compound of a Group VIII metal selected from among palladium, cobalt or nickel with an anion of a strong halogen-hydrohalogentic acid, , Phosphorus, arsenic, or antimony (Antimon). U.S. Patent No. 4,843,144 discloses a process for producing a polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon using a palladium compound, an anion of a non-hydrohalogenic acid having a pKa of less than 6, and a catalyst that is a bidentate ligand .

Recently, various fillers have been used for polyketones in high value added plastics, demand for high performance, and progress in the high-tech industry. The role of filler can be seen as cost reduction, improvement of physical properties or properties, functioning and improvement of processability.

 Polyketone blend studies with superior mechanical properties of polyketone blends are needed in response to industry requests for more diverse applications of thermoplastic plastics and demanding superior properties.

However, polyketone having functional advantages such as abrasion resistance, impact resistance and chemical resistance has a problem in that mechanical properties, particularly flexural modulus, are lower than that of PA66, PBT, and POM, in order to apply polyketone to various fields such as automobile, In order to solve the above problems, blending of polyketone with various resins has been proposed. However, the blending of polyketone with various resins has been proposed. However, it is difficult to apply the blend because of low workability due to lack of compatibility and other properties such as elongation and impact strength.

Korean Registered Patent No. 10-0652074 Korean Patent Registration No. 10-0615993

It is an object of the present invention to provide a polyketone composition capable of improving flexural characteristics while maintaining a tensile strength and an impact strength at a constant level as compared with conventional polyketone compositions.

In order to achieve the above object, the present invention provides a polyketone copolymer comprising repeating units represented by the following general formulas (1) and (2), having a molecular weight of 20,000 to 200,000, a molecular weight distribution of 1.5 to 2.5, x is 0.03 to 0.3, and the weight ratio of the polyketone to the amorphous semiaromatic polyamide is 60:40 to 95: 5. .

- [- CH2CH2-CO] x- (1)

- [- CH2 --CH (CH3) - CO] y - (2)

(x and y represent mol% of each of the general formulas (1) and (2) in the polymer).

The present invention also provides a polyketone composition characterized in that the amorphous semiaromatic polyamide is polyhexamethylene isophthalamide.

Further, the polyketone composition has a flexural strength of 65 to 90 MPa, a flexural modulus of 1,700 MPa or more, and an impact strength of 7 kJ / m 2 or more.

In addition, the present invention provides a molded article of polyketone prepared by including the polyketone composition.

The polyketone composition of the present invention exhibits an excellent bending property.

Hereinafter, the present invention will be described in detail.

The present invention is characterized by providing a polyketone composition improved in bending properties by containing amorphous semiaromatic polyamide in polyketone.

First, the polyketone as a main component of the present invention will be described. The polyketone resin used in the present invention is a thermoplastic synthetic resin which is an engineering plastic and recently developed as a new resin which is excellent in mechanical properties such as bending properties and molding properties and is usefully applied to various molded articles and parts . The mechanical properties of the polyketone resin belong to the category of high performance plastics, and they are attracting much attention as eco-friendly materials because they are polymeric materials synthesized from carbon monoxide as a raw material.

The polyketone resin is less hygroscopic than nylon, and it is possible to design various products with less changes in dimensions and physical properties due to moisture absorption. Especially, polyketone resin is more suitable for weight reduction because it has lower density than aluminum material.

Hereinafter, the process for producing the polyketone will be described.

The production process of polyketone is carried out in the presence of an organometallic complex catalyst comprising (a) a Group 9, 10 or 11 transition metal compound, and (b) a ligand having an element of Group 15, Wherein the carbon monoxide, ethylene and propylene are subjected to liquid phase polymerization in a mixed solvent of an alcohol (e.g., methanol) and water to produce a linear terpolymer, As the solvent, a mixture of 100 parts by weight of methanol and 2 to 10 parts by weight of water may be used. If the content of water in the mixed solvent is less than 2 parts by weight, a ketal may be formed to lower the heat stability in the process. If the amount is more than 10 parts by weight, the mechanical properties of the product may be deteriorated.

Wherein the catalyst comprises (a) a Group 9, 10 or 11 transition metal compound of the Periodic Table of the Elements (IUPAC Inorganic Chemical Nomenclature, 1989) and (b) a ligand having an element of Group 15 elements.

Examples of the Group 9 transition metal compound in the ninth, tenth, or eleventh group transition metal compound (a) include complexes of cobalt or ruthenium, carbonates, phosphates, carbamates, and sulfonates, Specific examples thereof include cobalt acetate, cobalt acetylacetate, ruthenium acetate, ruthenium trifluoroacetate, ruthenium acetylacetate, and ruthenium trifluoromethanesulfonate.

Examples of the Group 10 transition metal compounds include complexes of nickel or palladium, carbonates, phosphates, carbamates, sulfonates and the like. Specific examples thereof include nickel acetate, nickel acetylacetate, palladium acetate, palladium trifluoroacetate , Palladium acetylacetate, palladium chloride, bis (N, N-diethylcarbamate) bis (diethylamine) palladium and palladium sulfate.

Examples of Group 11 transition metal compounds include copper or silver complexes, carbonates, phosphates, carbamates, sulfonates and the like, and specific examples thereof include copper acetate, copper trifluoroacetate, copper acetylacetate, Examples of the trifluoroacetic acid include silver acetyl acetate, trifluoromethanesulfonic acid and the like.

Of these, the transition metal compound (a), which is preferable inexpensively and economically, is nickel and copper compounds, and the preferable transition metal compound (a) in terms of the yield of the polyketone and the molecular weight is the palladium compound, It is most preferable to use palladium acetate.

Examples of the ligands (b) having an atom of Group XIII include 2,2'-bipyridyl, 4,4'-dimethyl-2,2'-bipyridyl, 2,2'- Bis (diphenylphosphino) ethane, 1,3-bis (diphenylphosphino) propane, 1,4-bis (diphenylphosphino) (2-methoxyphenyl) propane, 1,3-bis [di (2-isopropyl) Bis (diphenylphosphino) cyclohexane, 1,2-bis (diphenylphosphino) phosphine] propane, (Diphenylphosphino) methyl] benzene, 1,2-bis [[di (2-methoxyphenyl) (Diphenylphosphino) ferrocene, 2-hydroxy-1,3-bis [di (2-methoxy- (2-methoxyphenyl) phosphino] propane, 2,2-dimethyl-1,3-bis [di (2- Spinosyns; there may be mentioned a ligand, such as propane.

Among these ligands, preferred ligands (b) having a Group 15 element are phosphorus ligands having an atom of Group 15, and particularly preferred ligands in terms of yield of polyketone are 1,3-bis [di (2- Methoxyphenyl) phosphino] propane and 1,2-bis [[di (2-methoxyphenyl) phosphino] methyl] benzene, Di (2-methoxyphenyl) phosphino] propane, and it is safe in that it does not require an organic solvent. Soluble sodium salts such as 1,3-bis [di (2-methoxy-4-sulfonic acid sodium-phenyl) phosphino] propane, 1,2- ] Methyl] benzene, and 1,3-bis (diphenylphosphino) propane and 1,4-bis (diphenylphosphino) butane are preferred for ease of synthesis and availability in large quantities and economically. The preferred ligand (b) having a Group 15 atom is 1,3-bis [di (2-methoxyphenyl) phosphino] propane or 1,3-bis (diphenylphosphino) Bis (di (2-methoxyphenyl) phosphino] propane or ((2,2-dimethyl-1,3-dioxane-5,5- -Methoxyphenyl) phosphine).

[Chemical Formula 1]

.

.

      Bis (bis (2-methoxyphenyl) phosphine) bis ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis Activity equivalent to that of 3,3-bis- [bis- (2-methoxyphenyl) phosphanylmethyl] -1,5-dioxa-spiro [5,5] undecane, which is known to exhibit the highest activity among polymerization catalysts The structure is simpler and has a lower molecular weight. As a result, the present invention has been able to provide a novel polyketone polymerization catalyst having the highest activity as a polyketone polymerization catalyst of the present invention, while further reducing its manufacturing cost and cost. A method for producing a ligand for a polyketone polymerization catalyst is as follows. ((2,2-dimethyl) -2,3-dioxolane was obtained by using bis (2-methoxyphenyl) phosphine, 5,5-bis (bromomethyl) Bis (bis (methylene)) bis (bis (2-methoxyphenyl) phosphine) is obtained by reacting a bis (methylene) . The process for preparing a ligand for a polyketone polymerization catalyst according to the present invention is a process for producing a ligand for a polyketone polymerization catalyst which comprises reacting 3,3-bis- [bis- (2-methoxyphenyl) phosphanylmethyl] -1,5-dioxa-spiro [5,5] ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene)) bis (bis (2- Methoxyphenyl) phosphine) can be commercially synthesized in a large amount.

      In a preferred embodiment, the process for preparing a ligand for a polyketone polymerization catalyst of the present invention comprises: (a) introducing bis (2-methoxyphenyl) phosphine and dimethylsulfoxide (DMSO) into a reaction vessel under nitrogen atmosphere, Adding sodium and stirring; (b) adding 5,5-bis (bromomethyl) -2,2-dimethyl-1,3-dioxane and dimethylsulfoxide to the resulting mixture, followed by stirring and reacting; (c) adding methanol and stirring after completion of the reaction; (d) adding toluene and water, separating the layers, washing the oil layer with water, drying with anhydrous sodium sulfate, filtering under reduced pressure, and concentrating under reduced pressure; And (e) the residue was recrystallized from methanol to obtain ((2,2-dimethyl-1,3-dioxane-5,5- diyl) bis (methylene)) bis (bis (2- methoxyphenyl) And a step of acquiring the image data.

The amount of the Group 9, Group 10 or Group 11 transition metal compound (a) to be used varies depending on the kinds of the ethylenic and propylenically unsaturated compounds to be selected and other polymerization conditions. Therefore, But it is usually from 0.01 to 100 mmol, preferably from 0.01 to 10 mmol, per 1 liter of the reaction zone. The capacity of the reaction zone means the liquid phase capacity of the reactor. The amount of the ligand (b) to be used is not particularly limited, but is usually 0.1 to 3 mol, preferably 1 to 3 mol, per 1 mol of the transition metal compound (a).

Further, the addition of benzophenone in the polymerization of the polyketone is another characteristic. In the present invention, an effect of improving the intrinsic viscosity of the polyketone can be achieved by adding benzophenone in the polymerization of the polyketone. The molar ratio of (a) the ninth, tenth, or eleventh transition metal compound to benzophenone is 1: 5-100, preferably 1:40-60. If the molar ratio of the transition metal to the benzophenone is less than 1: 5, the effect of improving the intrinsic viscosity of the produced polyketone is unsatisfactory. If the molar ratio of the transition metal to the benzophenone exceeds 1: 100, It is not preferable because it tends to decrease

Examples of the ethylenically unsaturated compound copolymerized with carbon monoxide include ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, 1-octene, -Olefins such as hexadecene and vinylcyclohexane; Alkenyl aromatic compounds such as styrene and? -Methylstyrene; But are not limited to, cyclopentene, norbornene, 5-methylnorbornene, 5-phenylnorbornene, tetracyclododecene, tricyclododecene, tricyclodecene, pentacyclopentadecene, pentacyclohexadecene, Cyclic olefins such as cyclododecene; Vinyl halides such as vinyl chloride; Ethyl acrylate, and acrylates such as methyl acrylate. Of these, preferred ethylenically unsaturated compounds are? -Olefins, more preferably? -Olefins having 2 to 4 carbon atoms, and most preferably ethylene.

Wherein the carbon monoxide and the ethylenically unsaturated compound and the propylenically unsaturated compound are copolymerized with an organometallic complex comprising a ligand (b) having an element of group 9, group 10 or group 11 transition metal compound (a) or group 15 Catalyzed, the catalyst is produced by contacting the two components. Any method may be employed as the method of contacting. That is, the solution may be prepared as a solution in which two components are premixed in a suitable solvent, or the two components may be supplied separately to the polymerization system and contacted in the polymerization system.

As the polymerization method, a solution polymerization method using a liquid medium, a suspension polymerization method, a vapor phase polymerization method in which a small amount of a polymer is impregnated with a high concentration catalyst solution, and the like are used. The polymerization may be either batchwise or continuous. The reactor used in the polymerization can be used as it is or in a known manner. The polymerization temperature is not particularly limited, and is generally 40 to 180 占 폚, preferably 50 to 120 占 폚. The pressure at the time of polymerization is not particularly limited, but is generally from normal pressure to 20 MPa, preferably from 4 to 15 MPa.

As described above, the polyketone is produced through a polymerization process according to the above-described production process.

On the other hand, the polyketone polymer of the present invention is a line-by-line alternating structure and substantially contains carbon monoxide per one molecule of unsaturated hydrocarbon. Ethylenically unsaturated hydrocarbons suitable for use as precursors of polyketone polymers have up to 20 carbon atoms, preferably up to 10 carbon atoms. Ethylenically unsaturated hydrocarbons can also be selected from the group consisting of ethene and alpha-olefins such as propene, 1-butene, iso-butene, 1- hexene, 1- octene, , Or an aryl aliphatic group containing an aryl substituent on another aliphatic molecule, particularly containing an aryl substituent on an ethylenically unsaturated carbon atom. Examples of aryl aliphatic hydrocarbons in ethylenically unsaturated hydrocarbons include styrene, p-methyl styrene, p-ethyl styrene and m-isopropyl styrene. The polyketone polymer preferably used in the present invention is a copolymer of carbon monoxide and ethene or a second ethylenically unsaturated hydrocarbon having carbon monoxide, ethene and at least three carbon atoms, in particular alpha-olefins such as propene Is a terpolymer.

When the polyketone terpolymer is used as the main polymer component of the blend of the present invention, there are at least two units containing an ethylene moiety in each unit containing the second hydrocarbon moiety in the terpolymer. It is preferable that the number of units containing the second hydrocarbon moiety is from 10 to 100.

The polymer ring of the polyketone polymer preferred in the present invention can be represented by the following formula (2).

(2)

- [CO- (-CH2-CH2-)] x- [CO- (G)] y-

In the general formula (2), G is an ethylenically unsaturated hydrocarbon, particularly a portion obtained from an ethylenically unsaturated hydrocarbon having at least three carbon atoms, and x: y is preferably at least 1: 0.01.

In another embodiment, the polyketone polymer is a copolymer comprising repeating units represented by the general formulas (1) and (2), and y / x is preferably 0.03 to 0.3. When the value of the y / x value is less than 0.03, there is a limit in that the meltability and processability are inferior. When the value of y / x is more than 0.3, the mechanical properties are poor. Further, y / x is more preferably 0.03 to 0.1.

- [- CH2CH2-CO] x- (1)

- [- CH2 --CH (CH3) - CO] y - (2)

In addition, the melting point of the polymer can be controlled by controlling the ratio of ethylene to propylene in the polyketone polymer. For example, when the molar ratio of ethylene: propylene: carbon monoxide is adjusted to 46: 4: 50, the melting point is about 220 ° C, while the melting point is adjusted to 235 ° C when the molar ratio is adjusted to 47.3: 2.7: 50.

Particularly preferred are polyketone polymers having a number average molecular weight of from 100 to 200,000, especially from 20,000 to 90,000, as measured by gel permeation chromatography. The physical properties of the polymer are determined according to the molecular weight, depending on whether the polymer is a copolymer or a terpolymer and, in the case of a terpolymer, the properties of the second hydrocarbon part. The melting point of the total of the polymers used in the present invention is 175 ° C to 300 ° C, and generally 210 ° C to 270 ° C. The intrinsic viscosity (LVN) of the polymer measured by HFIP (hexafluoroisopropyl alcohol) at 60 DEG C using a standard tubular viscosity measuring apparatus is 0.5 dl / g to 10 dl / g, preferably 0.8 dl / g to 4 dl / g, And more preferably 1.0 dl / g to 2.0 dl / g. If the intrinsic viscosity is less than 0.5 dl / g, the mechanical properties are deteriorated. If the intrinsic viscosity exceeds 10 dl / g, the workability is deteriorated.

On the other hand, the molecular weight distribution of the polyketone is preferably 1.5 to 2.5, more preferably 1.8 to 2.2. When the ratio is less than 1.5, the polymerization yield decreases. When the ratio is 2.5 or more, the moldability is poor. In order to control the molecular weight distribution, it is possible to adjust proportionally according to the amount of the palladium catalyst and the polymerization temperature. That is, when the amount of the palladium catalyst is increased or when the polymerization temperature is 100 ° C or higher, the molecular weight distribution becomes larger.

The amorphous semiaromatic polyamide which is a subcomponent of the present invention will be described.

As the amorphous semi-aromatic polyamide, poly (hexamethylene diisophthalamide) (nylon 6I), hexamethylene isophthalamide / hexamethylene terephthalamide copolymer (nylon 6I / 6T), poly (meta xylenylene isophthalamide) Nylon MXDI), caprolactam / meta xylenylene isophthalamide copolymer (nylon 6 / MXDI), caprolactam / hexamethylene isophthalamide copolymer (nylon 6 / 6I), and the like. Of these, polyhexamethyleneisophthalamide (nylon 6I) is particularly preferably used.

Specifically, the polyketone composition of the present invention is composed of a blend composed of a combination of a polyketone and an amorphous semi-aromatic polyamide, and is characterized in that the bending property is improved.

The weight of the amorphous semi-aromatic polyamide is 5 to 40 wt% based on the total weight. By weight, preferably 10 to 30% by weight, and more preferably 10 to 20% by weight. If the content of the polyketone resin is less than 60% by weight, the inherent mechanical strength, dimensional stability, molding properties, etc. of the polyketone resin deteriorate and the practicality is poor and the workability is significantly lowered. It may become difficult to impart a desired level of bending property due to a decrease in relative content.

In addition, carbon fiber, mica, talc, or the like may be added to the composition as a reinforcing material to reinforce mechanical properties. Antioxidants and pigments may also be added as desired. These additives may be suitably used by those skilled in the art.

Hereinafter, the production method for producing the polyketone composition is as follows.

The method for producing the polyketone composition of the present invention comprises the steps of: preparing a catalyst composition comprising a palladium compound, an acid having a pKa value of 6 or less, and a bidentate compound of phosphorus; Preparing a mixed solvent (polymerization solvent) containing an alcohol (for example, methanol) and water; Conducting the polymerization in the presence of the catalyst composition and the mixed solvent to prepare a linear terpolymer of carbon monoxide, ethylene and propylene; Removing the remaining catalyst composition from the linear terpolymer with a solvent (e.g., alcohol and acetone) to obtain a polyketone resin; And mixing the polyketone resin with an amorphous semi-aromatic polyamide.

As the palladium compound constituting the catalyst composition, palladium acetate can be used, and the amount of the palladium compound to be used is preferably 10 ^-3 to 10 ^-1 mole.

As the acid having a pKa value of 6 or less constituting the catalyst composition, at least one selected from the group consisting of trifluoroacetic acid, p-toluenesulfonic acid, sulfuric acid and sulfonic acid, preferably trifluoroacetic acid, may be used. 6 to 20 (mol) equivalents relative to the compound is appropriate.

Examples of the bidentate ligand compound constituting the catalyst composition include 1,3-bis [diphenylphosphino] propane (e.g., 1,3-bis [di (2-methoxyphenylphosphino)] propane, Bis [bis [anisyl] phosphinomethyl] -1,5-dioxaspiro [5,5] undecane and ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis Methylene)) bis (bis (2-methoxyphenyl) phosphine) may be used, and the amount thereof is suitably 1 to 1.2 (mol) relative to the palladium compound.

The carbon monoxide, ethylene and propylene are liquid phase polymerized in a mixed solvent of alcohol (e.g. methanol) and water to produce a linear terpolymer. As the mixed solvent, a mixture of 100 parts by weight of methanol and 2 to 10 parts by weight of water may be used. If the content of water in the mixed solvent is less than 2 parts by weight, a ketal may be formed to lower the heat stability in the process. If the amount is more than 10 parts by weight, the mechanical properties of the product may be deteriorated.

The polymerization temperature is preferably in the range of 50 to 100 ° C and the reaction pressure in the range of 40 to 60 bar. The resulting polymer is recovered through filtration and purification processes after polymerization, and the remaining catalyst composition is removed with a solvent such as alcohol or acetone.

In the present invention, the obtained polyketone resin is mixed with an amorphous semi-aromatic polyamide and then extruded by an extruder to finally obtain a blend composition. The blend is produced by putting into a twin-screw extruder, melt-kneading and extruding.

In this case, the extrusion temperature is preferably 230 to 260 ° C, and the screw rotation speed is preferably in the range of 100 to 300 rpm. If the extrusion temperature is less than 230 캜, kneading may not occur properly, and if the extrusion temperature exceeds 260 캜, problems related to the heat resistance of the resin may occur. If the screw rotation speed is less than 100 rpm, smooth kneading may not occur.

Hereinafter, the present invention will be described in detail by way of examples. However, these examples are provided only for the understanding of the present invention, and the scope of the present invention is not limited to these examples in any sense.

Example 1

(2, 2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene)) bis (bis (2-methoxyphenyl) phosphine) anion of trifluoroacetic acid. Linear propylene terpolymer of carbon monoxide, ethylene and propylene was polymerized in 100 parts by weight of methanol in a solvent of 70 to 90 with 2 parts by weight of water added. The molar ratio of ethylene to propene in the polyketone terpolymer prepared above was 46 to 4. On the other hand, the melting point of the polyketone terpolymer was 220 DEG C, and the intrinsic viscosity (LVN) measured in 1,1,1,3,3,3-HFIP was 1.5 dl / g and the molecular weight distribution was 2.0.

95 wt% of the polyketone terpolymer prepared above and 5 wt% of polyhexamethyleneisophthalamide were blended to prepare a polyketone composition.

Example 2

80% by weight of polyketone terpolymer and 20% by weight of polyhexamethyleneisophthalamide.

Example 3

70% by weight of a polyketone terpolymer and 30% by weight of a polyhexamethyleneisophthalamide.

Comparative Example 1

The same as Example 1 except that 100 wt% of polyketone was used.

Comparative Example 2

A specimen was prepared in the same manner as in Example 1, except that 80 wt% of Rhodda PA66 (product of A218V30) and 20 wt% of polyhexamethyleneisophthalamide were used.

Property evaluation

The prepared polyketone compositions of the above examples were prepared as test pieces, and the properties were evaluated in the following manner in comparison with the products of the comparative examples. The results are shown in Table 1 below.

Table 1 shows the results.

1. Tensile strength evaluation: ASTM D638.

2. Evaluation of Flexural Strength: ASTM D790

3. Evaluation of Flexural Modulus: ASTM D790.

4. Impact strength evaluation (Notched Izod): ASTM D236.

Item PK / 6I ratio Workability MI
(g / 10 min) The tensile strength
(MPa) Elongation at break
(%) Flexural strength
(MPa) Flexural modulus
(MPa) Impact strength
(kJ / m ²⁾ Example 1 95: 5 Great 57 65 301 65 1,758 10.3 Example 2 80:20 Great 26 68 173 75 1,918 8.6 Example 3 70:30 Great 50 71 32 83 2,052 7.4 Comparative Example 1 100: 0 Poor 76 64 426 62 1,649 9.6 Comparative Example 2 PA6I - - 73 - 109 2,841 7.1

As shown in Table 1, the flexural strength and flexural modulus of the examples were superior to those of Comparative Examples 1 and 2, while the impact strength was maintained at a certain level or more.

In particular, the flexural strength was excellent at 65 to 90 MPa, the flexural modulus was 1,700 MPa or more, and the impact strength was excellent at 7 kJ / m 2 or more.

Therefore, the polyketone compositions prepared through Examples in comparison with Comparative Examples 1 and 2 were evaluated to be suitable for use as thermoplastic plastics for bar industry, which has excellent bending properties.

Claims (6)

A polyketone copolymer comprising repeating units represented by the following general formulas (1) and (2), which has a number average molecular weight of 20,000 to 200,000, a molecular weight distribution of 1.5 to 2.5 and y / x of 0.03 to 0.3, Wherein the weight ratio of the polyketone to the amorphous semiaromatic polyamide is 70:30 to 95: 5, the tensile strength is 65 MPa to 71 MPa, the flexural strength is 65 MPa to 83 , A flexural modulus of 1.758 MPa to 2.052 MPa, an impact strength of 7.4 KJ / m2 to 10.3 KJ /
The ligand of the catalyst composition used in the polymerization of the above-mentioned linear alternating polyketone is preferably selected from the group consisting of ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene) ) Phosphine). ≪ / RTI >
- [- CH2CH2-CO] x- (1)
- [- CH2 --CH (CH3) - CO] y - (2)
(x and y represent mol% of each of the general formulas (1) and (2) in the polymer).
The method according to claim 1,
Wherein the amorphous semiaromatic polyamide is polyhexamethylene isophthalamide.
The method according to claim 1,
Wherein the polyketone composition has a flexural strength of 65 to 90 MPa.
The method according to claim 1,
Wherein the polyketone composition has a flexural modulus of 1,700 MPa or more.
The method according to claim 1,
Wherein the polyketone composition has an impact strength of 7 kJ / m < 2 > or more.

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