KR20160059877A - Polyketone bumper bracket - Google Patents

Abstract

The present invention relates to a polyketone bumper bracket and, more particularly, to a polyketone bumper bracket having excellent impact resistance and flame retardancy. The polyketone bumper bracket is manufactured by injection molding a blend including a linear alternating polyketone made of carbon monoxide and at least one kind of olefin-based unsaturated hydrocarbon, polyamide 6, and rubber.

Description

Polyketone bumper bracket

The present invention relates to a polyketone bumper bracket, and more particularly, to a polyketone bumper bracket which is a support between a bumper and a chassis manufactured using a blend including a polyketone resin, a polyamide 6, and a rubber.

BACKGROUND OF THE INVENTION [0002] A bumper of an automobile usually absorbs a certain amount of impact when a vehicle collides with an automobile or an external object, thereby reducing the amount of impact transmitted to the vehicle body, thereby preventing damage or injuries of the vehicle and the driver or occupant. As shown in Fig.

The car's bumper is largely divided into three parts, the bumper face is the front part of the vehicle, visible from the outside, and the bumper bracket is the part that connects the bumper face to the bumper.

Generally, bumper brackets are made of reinforced plastic to prevent breakage when the bumper is impacted. Therefore, conventional bumper brackets are made of high impact polyamide 66, but since polyamide has high water absorption rate and low chemical resistance, it can be easily corroded in winter, so it has better water resistance and chemical resistance than existing materials, There was a demand for material.

On the other hand, Polyketone (PK) is an inexpensive material of raw material and polymerization process ratio compared with general engineering plastic materials such as polyamide, polyester and polycarbonate. It has excellent properties such as heat resistance, chemical resistance, fuel permeability and abrasion resistance It is widely applied to various industries.

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 method for producing a polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon using a palladium compound, an anion of a nonhydrohalogen acid having a pKa of less than 6, and a catalyst that is a bidentate ligand Lt; / RTI >

Korean Patent No. 1006685720000

The object of the present invention is to provide a polyketone bumper bracket excellent in impact resistance, water resistance and chemical resistance in order to solve the above problems.

In order to achieve the above object, according to a preferred embodiment of the present invention, there is provided a process for producing a polyurethane elastomer composition, which comprises the steps of injection-molding a blend comprising a linear alternating polyketone consisting of carbon monoxide and at least one olefinically unsaturated hydrocarbon, To provide a polyketone bumper bracket.

According to another preferred embodiment of the present invention, the polyketone bumper bracket is characterized in that the polyketone is 40 to 90 wt%, the polyamide 6 is 5 to 40 wt%, and the rubber is 5 to 20 wt%.

According to another preferred embodiment of the present invention, there is provided a polyketone bumper bracket characterized in that the polyketone is 70 wt%, the polyamide 6 is 22 wt%, and the rubber is 8 wt%.

According to another preferred embodiment of the present invention, there is provided a polyketone bumper bracket characterized in that the polyketone bumper bracket has an impact strength of 75 kJ / m 2 or more.

According to another preferred embodiment of the present invention, there is provided a polyketone bumper bracket characterized in that the polyketone bumper bracket has a property retention ratio of 75% or more.

The polyketone bumper bracket of the present invention is superior in water resistance, chemical resistance, and impact resistance to nylon 66 that has been used.

Hereinafter, the present invention will be described in detail.

The polyketone bumper bracket of the present invention is composed of a composition comprising polyketone, polyamide 6 and rubber.

The polyketone, which is a main subject of the composition of the present invention, is a newly developed new resin, and is excellent in mechanical properties such as impact strength and molding characteristics, and is a thermoplastic synthetic resin which 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 the Group 11 transition metal compound include copper or silver complexes, carbonates, phosphates, carbamates, and sulfonates, and specific examples thereof include copper acetate, copper trifluoroacetate, copper acetylacetate, Examples of the fluoroacetic 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, 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.

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.

Specifically, the polyketone bumper bracket of the present invention is composed of a blend of polyketone, polyamide 6, and rubber, and is characterized by improving impact resistance, water resistance, and chemical resistance.

The melt index (240 ° C, 21.2 N) of the polyketone and polyamide is preferably 5 to 70 g / 10 min, and when the flow index is less than 5 g / 10 min, When the flow index exceeds 70 g / 10 min, physical properties such as impact strength are lowered.

If the content of the polyketone is less than 40% by weight, the effect of improving the calcium chloride resistance, heat resistance and absorbability of the composition may be reduced. If the content of the polyketone is less than 90% by weight, , There is a problem of an increase in the specific gravity. More preferably 60 to 80% by weight.

On the other hand, the polyamide is excellent in compatibility with the polyketone since the -NH group in the polyamide and the -CO group in the polyketone can be hydrogen bonded. In addition, the polyamide has excellent compatibility with the modified rubber by -NH 2 bonding at the chain terminal. Thus, the polyamide improves the impact strength of the polyketone by enhancing the compatibility between the polyketone and the rubber.

It is preferable that the polyamide is used in an amount of 5 to 40% by weight of the total composition. When the amount of the polyamide is less than 5% by weight, compatibility between the polyketone and the rubber is insufficient. When the polyamide is used in an amount exceeding 40% There may be a problem of deterioration and price increase. More preferably 15 to 30% by weight can be used.

The second component of the composition of the present invention is a rubber-based polymer. A preferred rubber matrix polymer is ethylene propylene diene monomer (M-class) rubber, EPDM rubber. The EPDM rubber is a non-polar rubber material having no double bond in the main chain and has excellent weatherability, ozone resistance, stability and electrical properties.

EPDM rubber is a by-product extracted from crude oil and is produced by solution polymerization reaction. Since it is economical, it is widely used in automobile products, tubes, belts, electric wires and various industrial products.

In the polyketone blend of the present invention, the EPDM rubber is preferably contained in an amount of 5 to 20% by weight based on the total blend weight. When the content of the EPDM rubber is less than 5% by weight, it is difficult to expect an improvement in impact strength. When the content exceeds 20% by weight, the inherent physical properties of the polyketone are lost and the ductility is decreased.

Here, the polyketone is most preferably 70% by weight, the polyamide 6 is 22% by weight and the rubber is 8% by weight, and most preferably excellent in impact resistance and physical property retention.

Meanwhile, the blend composition of the present invention as described above is molded into a polyketone bumper bracket that is molded by a method such as extrusion and injection and applied to a support between the bumper and the undercarriage.

Particularly, the polyketone bumper bracket of the present invention has excellent mechanical strength and excellent property retention. It is also possible to manufacture a polyketone automobile exterior part through the above-described constitution.

Hereinafter, a method for manufacturing the above-described polyketone bumper bracket will be described.

The method for producing a polyketone bumper bracket 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 and extruding the polyketone resin with polyamide 6 and rubber.

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) ), And the amount thereof to be used is suitably 1 to 1.2 (molar) equivalent based on 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 polyamide 6 and rubber 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 rotational speed is less than 100 rpm, the kneading may not be smoothly performed, and if it exceeds 300 rpm, the mechanical properties may deteriorate.

A polyketone bumper bracket can be manufactured by preparing a resin by the above-mentioned method and injecting it.

The polyketone bracket produced according to the present invention was found to have excellent impact resistance, water resistance and physical property retention.

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 DEG C added with 2 parts by weight of water. The melting point of the prepared terpolymer was 220 DEG C and the intrinsic viscosity (LVN) measured in 1,1,1,3,3,3-HFIP was 1.4 dl / g.

The polyketone terpolymer prepared above, 70 wt% of nylon 6, 22 wt% of nylon 6 and 8 wt% of rubber (EPDM) were put into a twin-screw extruder of L / D32 and D 40 and melted and kneaded at a temperature of 240 ° C at a rotation speed of 250 rpm To prepare a pellet.

Example 2

The same as Example 1 except that the inherent viscosity of the polyketone was adjusted to 1.1.

Example 3

The same as Example 1 except that the intrinsic viscosity of the polyketone was adjusted to 2.0.

Comparative Example 1

Rhodda PA66 Glass Fiber 33%, A218V30 product was used.

Property evaluation

The prepared pellets of the above examples were injection-molded to prepare bumper bracket specimens. The properties of the specimens were evaluated in the following manner in comparison with the products of the comparative examples, and the results are shown in Table 1 below.

1. Izod Impact Strength: Performed according to ASTM D256.

2. Tensile strength: ASTM D638.

3. Tensile strength retention of calcium chloride: The specimens prepared in accordance with ASTM D638 were immersed in water at 100 ° C for 2 hours, removed from the surface water, left at room temperature for 30 minutes, immersed in a 10% aqueous solution of calcium chloride at 100 ° C for 2 hours The retention rate of the tensile strength per 5 cycles was evaluated by taking one total of 5.5 hours as a total of 5.5 hours of removing the surface water after leaving at room temperature for 1 hour. The maintenance rate evaluation was carried out for a total of 20 cycles.

Item Example 1 Example 2 Example 3 Comparative Example 1 Izod impact strength (kJ / m2) 90 89 92 49 Tensile Strength (MPa) 55 56 57 58 Property retention (%)
(90% relative humidity) 85 84 83 40 Property retention (%)
(10% calcium chloride) 80 78 79 30

As shown in Table 1, the tensile strength of Example 1 was similar to that of Comparative Example 1, but the impact strength (75 kJ / m 2 or more) was significantly higher than that of Comparative Example 1. In addition, the physical property retention rate for high humidity and the chemical resistance test for calcium chloride showed that the retention rate of physical properties was higher than 75%.

Therefore, the bumper brackets manufactured through the examples in comparison with the comparative examples have high impact resistance and high retention of physical properties, and thus are more suitable for use as bumper brackets.

Claims (6)

A polyketone bumper bracket characterized in that the polyketone bumper bracket is produced by injection molding a blend comprising a linear alternating polyketone consisting of carbon monoxide and at least one olefinically unsaturated hydrocarbon, polyamide 6 and rubber.
The method according to claim 1,
Wherein the polyketone is 40 to 90 wt%, the polyamide 6 is 5 to 40 wt%, and the rubber is 5 to 20 wt% based on the total weight of the blend.
The method according to claim 1,
Wherein the polyketone is 70 wt%, the polyamide 6 is 22 wt%, and the rubber is 8 wt%.
The method according to claim 1,
Wherein the polyketone bumper bracket has an impact strength of 75 kJ / m < 2 > or more.
The method according to claim 1,
Wherein the polyketone bumper bracket has a tensile strength retention of 75% or more in a 10% aqueous solution of calcium chloride.
The method according to claim 1,
Wherein the rubber is an ethylene propylene diene monomer rubber.