KR20160059892A - Polyketone vehicle wheel rim - Google Patents

Abstract

The present invention relates to a polyketone blend resin composition comprising a polyketone copolymer, glass fibers, and an inorganic filler. The polyketone blend resin composition has excellent properties of coefficient of linear expansion, tensile strength, elongation, and specific gravity, thereby being proper to be used as a rim of an automobile wheel. The polyketone copolymer is represented by -(CH_2CH_2-CO)_x- and -(CH_2CH(CH_3)-CO)_y-, and has y/x of 0.03 to 0.3.

Description

{Polyketone vehicle wheel rim}

The present invention relates to a polyketone blend resin composition which can be used as a rim of an automobile wheel, and more particularly to a polyketone blend resin composition comprising a polyketone copolymer, a glass fiber, an inorganic filler and an additive, To a polyketone blend resin composition.

Generally, a road wheel of a vehicle (hereinafter referred to as a wheel) is a part for mounting and supporting a tire, which is composed of a rim, a hub, and a spoke connecting between them.

A tire of an automobile mounted on such a wheel is closely mounted and fixed on the outer periphery of a wheel constituting an outer circumferential surface on a wheel hub, and not only absorbs impact transmitted from the road surface during traveling, but also brakes, drives, So as to prevent slippage due to the proper friction of the roller.

Here, the wheel to be mounted on the outer circumferential surface of the automobile is usually fixed together with a disk or a drum on a wheel hub mounted idly or integrally rotatably on the axle, and the edge portion is protruded to mount the tire on the outer circumferential surface A hub which forms a central portion of the rim so as to be fixed to the outer periphery of the wheel hub through a screw connection, and a hub which connects the rim and the hub, And a plurality of spokes radially projecting from the hub to support the spokes.

The edge of the rim maintains a protruding shape to facilitate attachment of the lead to be mounted in order to balance the wheel in the future.

These rims are currently made of main steel and aluminum materials. Aluminum has a beautiful appearance and small deformation against impact, but it has a problem of low fuel consumption due to its large specific gravity and long travel distance during braking.

A technique developed to solve the above problem is Korean Patent Registration No. 10-1198625. The present invention relates to a metal composite material for a vehicle and a method of manufacturing the metal composite material,

Inserting a composite material for forming an inner rim into a joint of the outer rim and the inner peripheral surface of the outer mold in a stacked manner; Inserting an intermediate mold inside the outer mold and inserting an inner mold into the inner mold to form a mold assembly; The method of manufacturing a mold assembly according to any one of claims 1 to 3, further comprising the steps of: (a) forming an outer rim and an inner rim of the mold assembly And compressing residual stress at the joint between the outer rim and the inner rim.

As the composite material of the inner rim used in the above literature, 30 to 50 parts by weight of aluminum powder is mixed with 100 parts by weight of a composite resin composition in which a volume fraction of 30 to 75% of carbon fibers and a volume fraction of 25 to 70% .

Although the rim of an automobile wheel with improved mechanical properties such as linear expansion coefficient, tensile strength and elongation can be produced by the composite material, it is difficult to achieve weight reduction of products by adding aluminum.

Korean Patent Publication No. 10-1198625

In order to solve the above problems, the present invention provides a polyketone blend resin composition including a polyketone copolymer, a glass fiber, an inorganic filler and an additive, which can be used as a rim of an automobile wheel, Which is a main object of the present invention.

In order to solve the above problems,

A polyketone copolymer represented by the following general formulas (1) and (2) and having y / x of 0.03 to 0.3; Glass fiber; A polyketone blend resin composition usable as a rim of an automobile wheel composed of an inorganic filler is provided as a main means for solving the problems.

- (CH2CH2-CO) x- (1)

- (CH2CH (CH3) -CO) y- (2)

(x and y are mole% of each of the general formulas (1) and (2) in the polymer)

The glass fiber and the inorganic filler used in the present invention are contained in an amount of 20 to 500 parts by weight and 5.5 to 15.5 parts by weight, respectively, relative to 100 parts by weight of the polyketone copolymer.

The inorganic filler may be calcium carbonate, magnesium sulfate, silicon carbide, calcium oxide, or the like.

Further, the present invention can add an additive to solve the above problems more effectively.

The additive may be a water-reducing agent, an initiator, a releasing agent, a thickener or the like.

The additive may be included in an amount of 3.5 to 10.5 parts by weight based on 100 parts by weight of the polyketone copolymer.

The polyketone blend resin composition of the present invention is excellent in mechanical properties such as linear expansion coefficient, tensile strength and elongation, and can be reduced in weight. Thus, when the resin composition is used as a rim of an automobile wheel, the fuel economy is expected to be reduced due to the weight reduction of the product. Also, the recycling of resources by using plastic materials is expected.

Hereinafter, the present invention will be described in detail.

The present invention relates to a polyketone blend resin composition usable as a rim of an automobile wheel, comprising a polyketone copolymer; Glass fiber; The inorganic filler is characterized by containing a slipping agent.

In addition, a water reducing agent, an initiator, a release agent, a thickener, etc. may be added as needed.

1. Polyketone copolymer

The polyketone copolymer of the present invention is a linear 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.

Preferred polymeric rings of the polyketone polymers in the present invention can be represented by the following formula (1).

[Chemical Formula 1]

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

In the above formula (1), G is an ethylenically unsaturated hydrocarbon, particularly 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, and the melting point is adjusted to 235 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 to 300 占 폚, and is generally 210 to 270 占 폚. The intrinsic viscosity (LVN) of the polymer measured by HFIP (Hexafluoroisopropylalcohol) using a standard tubular viscosity measuring apparatus is from 0.5 dl / g to 10 dl / g, more preferably from 0.8 dl / g to 4 dl / g, And 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 or more, the molecular weight distribution becomes large.

The polyketone copolymer of the present invention is polymerized through a liquid phase polymerization carried out in a mixed solvent of acetic acid and water through a catalyst composition comprising carbon monoxide and an olefin with a palladium compound, an acid having 6 or less of PKa and phosphorus of this phosphorus compound. The polymerization temperature is preferably from 50 to 100 ° C. and the reaction pressure is from 40 to 60 bar. The 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.

This is preferred as palladium acetate and a palladium compound in the amount of 10 ^-3 to ^10-2 1mole preferred. Specific examples of the acid having a pKa value of 6 or less include trifluoroacetic acid, p-toluenesulfonic acid, sulfuric acid, and sulfonic acid. In the present invention, trifluoroacetic acid is used and its amount is preferably 6 to 20 equivalents based on palladium. ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene)) bis (bis (2-methoxyphenyl) phosphine) is preferable as the two- , And the amount to be used is preferably 1 to 1.2 equivalents based on palladium.

Hereinafter, the polymerization process of the polyketone copolymer will be described in detail.

The polymerization of the polyketone copolymer of the present invention 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, Is prepared by terpolymerizing carbon monoxide and ethylenic and propylenically unsaturated compounds in the medium.

The (a) Group 9, Group 10 or Group 11 transition metal compound may be a complex of cobalt or ruthenium, a carbonate, a phosphate, a carbamate or a sulfonate, and specific examples thereof include cobalt acetate, cobalt acetyl Acetate, ruthenium acetate, ruthenium trifluoroacetate, ruthenium acetylacetate, ruthenium trifluoromethanesulfonate. Nickel, or palladium, carbonates, phosphates, carbamates, and sulfonates. Specific examples thereof include nickel acetate, nickel acetylacetate, palladium acetate, palladium trifluoroacetate, palladium chloride, bis (N, N-diethylcarbamate) bis (diethylamine) palladium, palladium sulfate, complexes of copper or silver, carbonates, phosphates, carbamates and sulfonates. Specific examples thereof include copper acetate, And copper acetate, copper acetylacetate, acetic acid silver, trifluoroacetic acid silver, silver acetylacetate, trifluoromethanesulfonic acid and the like.

Among them, a palladium compound, particularly palladium acetate, is preferable in terms of yield of polyketone and molecular weight.

Examples of the ligand having an atom of Group 15 of (b) include (bis (2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene) ) Phosphine), 2,2'-bipyridyl, 4,4'-dimethyl-2,2'-bipyridyl, 2,2'-biphenyl- Bis (diphenylphosphino) propane, 1,4-bis (diphenylphosphino) butane, 1,3-bis [di (2-methoxyphenyl) phosphine] propane, 1,3-bis [di (2-isopropyl) Bis (diphenylphosphino) benzene, 1,2-bis (diphenylphosphino) benzene, 1,2-bis (diphenylphosphino) Bis [(di (2-methoxyphenyl) methyl] benzene, 1,2-bis [ Sulfonate sodium-phenyl) phosphino] methyl] benzene, 1,1'-bis (diphenylphosphino) ferrocene, 2- Phosphorus ligands such as cis-1,3-bis [di (2-methoxyphenyl) phosphino] propane and 2,2-dimethyl-1,3-bis [di (2- methoxyphenyl) .

Among them, preferred ligands (b) having a Group 15 element are phosphorus ligands having an atom of Group 15, and particularly preferred ligands in terms of the yield of polyketone are ((2,2-dimethyl- Bis (di (2-methoxyphenyl) phosphino] propane, 1 (3-dioxane-5,5-diyl) bis (2-methoxyphenyl) phosphino] methyl] benzene in view of the molecular weight of the polyketone, and 2-hydroxy [ (2,2-dimethyl-1, 3-bis [di (2-methoxyphenyl) phosphino] propane in view of safety without requiring an organic solvent, Di (2-methoxy-4-sulfonic acid sodium-phenyl) -bis (bis (methylene) (2-methoxy-4-sulfonic acid sodium-phenyl) phosphino] methyl] benzene, and most preferably (( (2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene)) bis (bis (2-methoxyphenyl) phosphine).

When the polyketone of the present invention is polymerized, benzophenone may be added as needed. The amount of benzophenone to be added is such that (a) the molar ratio of benzophenone to the ninth, tenth or eleventh transition metal compound and 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, .

(a) The amount of the Group 9, Group 10 or Group 11 transition metal compound to be used varies depending on the kind of the ethylenically unsaturated compound to be selected and other polymerization conditions, But is usually 0.01 to 100 mmol, preferably 0.01 to 10 mmol, per liter of the reaction volume 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).

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, tricyclo undecene, 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.

  The ternary copolymerization of carbon monoxide, the ethylenically unsaturated compound and propene is carried out in the presence of an organometallic complex catalyst comprising a ligand (b) having an element of group 9, group 10 or group 11 transition metal compound (a) and group 15 element , Wherein 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. As the reactor used for the polymerization, known ones can be used as they are or by processing. 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.

2. Fiberglass

In the present invention, glass fibers are added to improve the strength and impact resistance of the polyketone blend resin composition. When the amount is less than 20 parts by weight, mechanical properties such as linear expansion coefficient, tensile strength, and elongation are deteriorated. When the amount exceeds 50 parts by weight, the glass fiber is excessively spilled on the surface The appearance quality of the rim is deteriorated.

3. Inorganic fillers and additives

The present invention also provides an inorganic filler for further improving the mechanical properties of the polyketone blend resin composition. As the inorganic filler to be added, components generally used in resin compositions can be used. In the present invention, calcium carbonate, magnesium sulfate, silicon carbide, calcium oxide and the like are used.

The inorganic filler is preferably added in an amount of 5.5 to 15.5 parts by weight based on 100 parts by weight of the polyketone copolymer. When the content of the inorganic filler exceeds 15.5 parts by weight, the physical properties are deteriorated. When the content of the inorganic filler is less than 5.5 parts by weight, the particles may agglomerate to cause cracks.

Meanwhile, additives such as a water reducing agent, an initiator, a releasing agent, a thickening agent, etc. may be added to improve the formability and surface appearance characteristics of the product.

The additive may be included in an amount of 3.5 to 10.5 parts by weight based on 100 parts by weight of the polyketone copolymer.

As a low profile agent to be used, thermoplastic resins such as polyvinyl acetate and PS and PMMA are preferable. As the initiator, t-butyl perbenzoate is preferable, and a mold release agent zinc stearate is preferred as a thickening agent and calcium oxide is preferred as a thickening agent. However, it should be understood that the present invention is not limited thereto and those skilled in the art can appropriately select the kind and amount of the additive within the scope of the present invention.

Hereinafter, a method for producing a polyketone blend resin composition usable as a rim of an automobile wheel of the present invention will be described in detail.

The method for producing a polyketone copolymer of the present invention comprises: 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) comprising 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 propene; Removing the remaining catalyst composition from the linear terpolymer with a solvent (e.g., alcohol and acetone) to obtain a polyketone resin; And mixing and extruding the polyketone resin with glass fibers, an inorganic filler, and an additive.

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.

As the 2-position ligand compound constituting the catalyst composition, bis (2, 2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene) bis (bis (2-methoxyphenyl) ), 1,3-bis [diphenylphosphino] propane (such as 1,3-bis [di (2-methoxyphenylphosphino)] propane and 1,3- ] -1,5-dioxaspiro [5,5] undecane, and the amount thereof is suitably 1 to 1.2 (mol) relative to the palladium compound.

The carbon monoxide, ethylene and propene are liquid phase polymerized in a mixed solvent of methanol and water to produce a linear terpolymer.

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.

20 to 50 parts by weight of glass fiber, 5.5 to 15.5 parts by weight of inorganic filler and 3.5 to 10.5 parts by weight of additives are mixed with 100 parts by weight of the obtained polyketone resin and 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 rotational speed is less than 100 rpm, smooth kneading may not occur. If the screw rotation speed is more than 300 rpm, the glass fiber may be broken and the mechanical properties may be deteriorated.

4. Examples and Comparative Examples

Hereinafter, the constitution and effects of the present invention will be described in detail with reference to specific examples and comparative examples. However, these examples are merely intended to clearly understand the present invention and are not intended to limit the scope of the present invention. The present invention will be described in detail with reference to the following non-limiting examples.

Example 1

Catalysts formed from palladium acetate, trifluoroacetic acid and ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene)) bis (bis (2-methoxyphenyl) A linear alternating polyketone terpolymer of carbon monoxide and ethylene and propene was prepared in the presence of the composition. In the above, the content of trifluoroacetic acid with respect to palladium is 11 times the molar ratio, and the two stages of the first stage at a polymerization temperature of 80 ° C and the second stage at 84 ° C are carried out. The molar ratio of ethylene to propene in the polyketone terpolymer prepared above was 46 to 4. The melting point of the polyketone terpolymer was 220 占 폚, the LVN measured at 25 占 폚 by HFIP (hexa-fluoroisopropano) was 1.2 dl / g, the MI index was 60 g / 10 min and the MWD was 2.0.

20 parts by weight of glass fiber, 10 parts by weight of calcium carbonate and 3.5 parts by weight of polyvinyl acetate were added to 100 parts by weight of the polyketone terpolymer prepared above, and the mixture was fed into a twin screw extruder of L / D32 and D 40, And extruded through melt-kneading at a screw rotating speed.

Example 2

Catalysts formed from palladium acetate, trifluoroacetic acid and ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene)) bis (bis (2-methoxyphenyl) A linear alternating polyketone terpolymer of carbon monoxide and ethylene and propene was prepared in the presence of the composition. In the above, the content of trifluoroacetic acid with respect to palladium is 10 times the molar ratio, and the two stages of the first stage at a polymerization temperature of 78 占 폚 and 84 占 폚 are carried out. The molar ratio of ethylene to propene in the polyketone terpolymer prepared above was 46 to 4. The melting point of the polyketone terpolymer was 220 占 폚, the LVN measured at 25 占 폚 by HFIP (hexa-fluoroisopropano) was 1.4 dl / g, the MI index was 60 g / 10 min and the MWD was 2.0.

40 parts by weight of glass fiber, 10 parts by weight of calcium carbonate and 3.5 parts by weight of polyvinyl acetate were added to 100 parts by weight of the polyketone terpolymer prepared above, and the mixture was fed into a twin screw extruder of L / D32 and D 40, And extruded through melt-kneading at a screw rotating speed.

Example 3

Catalysts formed from palladium acetate, trifluoroacetic acid and ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene)) bis (bis (2-methoxyphenyl) A linear alternating polyketone terpolymer of carbon monoxide and ethylene and propene was prepared in the presence of the composition. In the above, the content of trifluoroacetic acid with respect to palladium is 9 times the molar ratio, and the two stages of the first stage at a polymerization temperature of 74 deg. C and the second stage at 84 deg. The molar ratio of ethylene to propene in the polyketone terpolymer prepared above was 46 to 4. The melting point of the polyketone terpolymer was 220 占 폚, the LVN measured at 25 占 폚 by HFIP (hexa-fluoroisopropano) was 1.6 dl / g, the MI index was 60 g / 10 min and the MWD was 2.0.

10 parts by weight of calcium carbonate and 3.5 parts by weight of polyvinyl acetate were added to 100 parts by weight of the polyketone terpolymer prepared above, and the mixture was charged into a twin-screw extruder of L / D32 and D40, and melt-kneaded at 240 DEG C and 250 rpm screw rotation speed Lt; / RTI >

Example 4

Catalysts formed from palladium acetate, trifluoroacetic acid and ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene)) bis (bis (2-methoxyphenyl) A linear alternating polyketone terpolymer of carbon monoxide and ethylene and propene was prepared in the presence of the composition. In the above, the content of trifluoroacetic acid with respect to palladium is 10 times the molar ratio, and the two stages of the first stage at a polymerization temperature of 78 占 폚 and 84 占 폚 are carried out. The molar ratio of ethylene to propene in the polyketone terpolymer prepared above was 46 to 4. The melting point of the polyketone terpolymer was 220 占 폚, the LVN measured at 25 占 폚 by HFIP (hexa-fluoroisopropano) was 1.4 dl / g, the MI index was 60 g / 10 min and the MWD was 1.8.

45 parts by weight of glass fiber, 10 parts by weight of calcium carbonate and 3.5 parts by weight of polyvinyl acetate were added to 100 parts by weight of the polyketone terpolymer prepared above, and the mixture was fed into a twin screw extruder of L / D32 and D 40, And extruded through melt-kneading at a screw rotating speed.

Comparative Example 1

Instead of the polyketone polymer, 20 parts by weight of glass fiber, 10 parts by weight of calcium carbonate and 3.5 parts by weight of polyvinyl acetate were mixed with 100 parts by weight of a composite resin composition comprising 60% by weight of a volumetric carbon fiber and 40% Screw extruder and extruded through melt kneading at a temperature of 240 DEG C and a screw rotation speed of 250 rpm.

Comparative Example 2

20 parts by weight of an aluminum powder having a diameter of 30 to 300 탆, 20 parts by weight of glass fibers, 10 parts by weight of calcium carbonate, 3.5 parts by weight of polyvinyl acetate 3.5 Were added to a twin-screw extruder of L / D32 and D40, and extruded through melt-kneading at a temperature of 240 DEG C and a screw rotation speed of 250 rpm.

Property evaluation

The prepared pellets of the above example were injection molded to prepare a 0.5 mm thick plate-shaped specimen mold for rim of an automobile wheel. The coefficient of linear expansion, tensile strength, elongation and specific gravity were measured, and the results are shown in Table 1.

Item Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Coefficient of linear expansion
α × 10 ^-5 0.47 0.55 0.44 0.52 0.78 0.88 The tensile strength
kg / mm ² 48 52 35 52 24 22 Elongation
(%) 15 12 16 14 12 14 weight
(kg) 7.8 7.4 7.2 6.8 12.4 13.2

As shown in Table 1, all the physical properties such as coefficient of linear expansion, tensile strength, elongation and specific gravity are superior to those of Comparative Examples 1 and 2 in the case of Examples 1 to 4, which proved to be suitable for use as a material for a rim of an automobile wheel .

Claims (4)

In the rim of an automobile wheel,
The rim is a polyketone copolymer represented by the following general formulas (1) and (2) and having y / x of 0.03 to 0.3; Glass fiber; Wherein the inorganic filler is made from a polyketone resin composition composed of an inorganic filler.
- (CH2CH2-CO) x- (1)
- (CH2CH (CH3) -CO) y- (2)
(x and y are mole% of each of the general formulas (1) and (2) in the polymer)
The method according to claim 1,
Wherein the glass fiber and the inorganic filler are contained in an amount of 20 to 50 parts by weight and 5.5 to 15.5 parts by weight, respectively, based on 100 parts by weight of the polyketone copolymer.
The method according to claim 1,
Wherein the inorganic filler is selected from calcium carbonate, magnesium sulfate, silicon carbide, and calcium oxide.
The method according to claim 1,
The polyketone copolymer has an intrinsic viscosity of 1.0 to 2.0 dl / g and a molecular weight distribution of 1.5 to 2.5, and is a bidentate compound of phosphorus constituting the catalyst composition ((2,2-dimethyl-1,3-dioxane-5 Bis (methylene)) bis (bis (2-methoxyphenyl) phosphine).