KR101734890B1 - Polyketone hose connector - Google Patents
Polyketone hose connector Download PDFInfo
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- KR101734890B1 KR101734890B1 KR1020150074032A KR20150074032A KR101734890B1 KR 101734890 B1 KR101734890 B1 KR 101734890B1 KR 1020150074032 A KR1020150074032 A KR 1020150074032A KR 20150074032 A KR20150074032 A KR 20150074032A KR 101734890 B1 KR101734890 B1 KR 101734890B1
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- South Korea
- Prior art keywords
- polyketone
- bis
- hose connector
- polymerization
- methoxyphenyl
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G67/00—Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing oxygen or oxygen and carbon, not provided for in groups C08G2/00 - C08G65/00
- C08G67/02—Copolymers of carbon monoxide and aliphatic unsaturated compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L73/00—Compositions of macromolecular compounds obtained by reactions forming a linkage containing oxygen or oxygen and carbon in the main chain, not provided for in groups C08L59/00 - C08L71/00; Compositions of derivatives of such polymers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2120/00—Compositions for reaction injection moulding processes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/50—Physical properties
- C08G2261/62—Mechanical aspects
Abstract
The present invention relates to a polyketone hose connector, and more particularly, to a polyketone hose connector having a low temperature tensile elongation and an excellent impact resistance by applying a polyketone to a hose connector.
Description
The present invention relates to a polyketone hose connector, and more particularly, to a polyketone hose connector having a low temperature tensile elongation and an excellent impact resistance by applying a polyketone to a hose connector.
Polyketone (PK) has been widely applied to various industries because it has excellent chemical resistance, fuel permeability and abrasion resistance compared with general engineering plastic materials such as polyamide, polyester and polycarbonate.
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 by using a palladium compound, an anion of a nonhydrohalogenic acid having a pKa of less than 6, and a catalyst which is a bidentate ligand Lt; / RTI >
Conventionally, hose connectors have been manufactured by using metal materials such as brass. When hose connector is manufactured by replacing metal material with plastic material for light weight and cost reduction, hose connector functioning to supply water supplied from outside in two parts in Y shape is exposed to external environment, There is a problem in that, when freezing, the water remaining inside is broken by freezing.
Accordingly, the inventors of the present invention have invented a polyketone hose connector having excellent low temperature tensile elongation and impact resistance, which are physical properties required for a hose connector.
It is an object of the present invention to provide a polyketone hose connector which can be used in a hose connector.
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), which is obtained by injection molding a polyketone copolymer having y / x of 0.03 to 0.3 And having a low temperature impact strength at minus 30 ° C of 4 kJ / m 2 or more.
[Formula 1]
- (CH2CH2-CO) x-
[Formula 2]
- (CH2CH (CH3) -CO) y-
(x and y are mole% of each of the general formulas (1) and (2) in the polymer)
Here, the polyketone copolymer is characterized in that the molar ratio of ethylene to propylene is 99: 1 to 85:15.
The polyketone copolymer preferably has an intrinsic viscosity of 1.0 to 2.0 dl / g.
Further, when the ligand of the catalyst composition used in the polymerization of the polyketone copolymer is bis (methylene) bis (bis (2,2-dimethyl-1,3-dioxane-5,5- Phosphine) phosphine).
The polyketone hose connector according to the present invention is superior in low temperature tensile elongation and impact resistance as compared with metal materials such as brass used in the prior art, so that the hose connector can be stably manufactured and used.
The polyketone to be used in the present invention is a copolymer of repeating units derived from carbon monoxide, an ethylenically unsaturated compound and one or more olefinically unsaturated hydrocarbon compounds, three or more copolymers, particularly carbon monoxide-derived repeating units, and ethylenically unsaturated compounds, Is a structure in which repeating units derived from an unsaturated compound are substantially alternately linked and has excellent mechanical and thermal properties, excellent processability, high abrasion resistance, chemical resistance, and gas barrier properties. It is considered that the high molecular weight product of the copolymerized polyketone having three or more members is more useful as an engineering plastic material having higher workability and thermal properties and having excellent economy. Particularly, it has high abrasion resistance and can be used in light gasoline tanks because of high gas barrier properties such as parts of gears of automobiles, high chemical resistance, and lining materials of chemical transport pipes. In the case of using an ultrahigh molecular weight polyketone having an intrinsic viscosity of 2 or more as the fiber, it is possible to conduct stretching at a high magnification and to have a high strength and a high modulus of elasticity oriented in the stretching direction as belts, reinforcements of rubber hoses, tire cords, And is suitable for use in building materials and industrial materials.
The production method 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 elements, A process for producing a polyketone by terephthalic copolymerization of an ethylenic and a propylenically unsaturated compound is characterized in that a mixed solvent of 70 to 90% by volume of acetic acid and 10 to 30% by volume of water is used as a liquid medium and benzophenone .
Here, the liquid medium is characterized in that a mixed solvent of acetic acid and water is used without using methanol, dichloromethane, or nitromethane, which has conventionally been used for producing polyketones. This is because the use of a mixed solvent of acetic acid and water as a liquid medium for the production of polyketone can improve the catalytic activity while reducing the manufacturing cost of the polyketone.
When a mixed solvent of acetic acid and water is used as a liquid medium, when the concentration of water is less than 10% by volume, the effect of the catalyst is less affected. When the concentration of water is 10% by volume or more, the catalytic activity increases sharply. On the other hand, when the concentration of water exceeds 30% by volume, the catalytic activity tends to decrease. Therefore, it is preferable to use a mixed solvent comprising 70 to 90% by volume of acetic acid and 10 to 30% by volume of water as a liquid medium.
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 0.13 mol, preferably 13 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, most preferably ethylene, and 1 to 20 mol% of propylene is added in the production of the terpolymerized polyketone.
Here, it is preferable to adjust the charging ratio of the carbon monoxide and the ethylenic unsaturated compound to 1: 1 to 2 (molar ratio) and to adjust the propylene to 1 to 20 mol% based on the total mixed gas. In the production of polyketones, it is general to set the mixing ratio of carbon monoxide and ethylenic unsaturated compound to 1: 1. However, in the present invention in which a mixed solvent of acetic acid and water is used as a liquid medium and benzophenone is added during polymerization, It has been found that when the feed ratio of the unsaturated compound is adjusted to 1: 1 to 2 and the propylene is adjusted to 1 to 20 mol% based on the total mixed gas, not only the processability but also the catalyst activity and the intrinsic viscosity can be simultaneously achieved. When the amount of propylene is less than 1 mol%, the effect of the ternary copolymerization to lower the melting temperature can not be obtained. When the amount exceeds 20 mol%, the intrinsic viscosity and the improvement of the catalytic activity are inhibited, so that the addition ratio is adjusted to 1 to 20 mol% .
In addition, in the process, a mixed solvent of acetic acid and water is used as a liquid medium, benzophenone is added during polymerization, and carbon monoxide, an ethylenically unsaturated compound and one or more olefinic unsaturated compounds are added to improve the catalytic activity and intrinsic viscosity of the polyketone In addition, in the prior art, it is possible to produce a terpolymer having a high intrinsic viscosity at a polymerization time of about 1 to 2 hours, unlike the case where the polymerization time has to be at least 10 hours or more for the purpose of improving the intrinsic viscosity.
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.
A linear alternating polyketone is prepared by the polymerization method as described above.
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 present invention, at least two units containing an ethylene moiety are contained 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. More preferably from 99: 1 to 85:15, and if it exceeds 85:15, there is a problem that the mechanical properties are deteriorated.
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 (Hexafluoroisopropylalcohol) at 25 DEG C using a standard tubular viscosity measuring apparatus is 0.5 dl / g to 10 dl / g, and preferably 0.8 dl / g to 4 dl / g. If the intrinsic viscosity is less than 0.5 or more than 10, the moldability is deteriorated during injection molding.
A preferred process for producing a polyketone polymer is disclosed in U.S. Patent No. 4,843,144. In the presence of a catalyst composition suitably produced from an anion of a non-hydrohalogenic acid having a pKa of less than 6 or preferably less than pKa < 2 > and a bidentate ligand of phosphorus (measured in water at 18 DEG C), carbon monoxide and a hydrocarbon monomer Is contacted under polymerization conditions to prepare a polyketone polymer.
In the present invention, conventionally known additives such as an antioxidant, a stabilizer, a filler, a refractory material, a releasing agent, a coloring agent and other materials may be included in order to improve processability and physical properties of the polymer. The polyketone hose connector can be manufactured by extrusion molding or injection molding of the polyketone as described above. At this time, the polyketone hose connector has a high impact resistance at a low temperature, and has a low temperature impact strength at minus 30 ° C of 4 kJ / m 2 or more.
Therefore, the polyketone hose connector manufactured by the present invention has been shown to have excellent impact resistance.
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 One
The linear alternating polyketone terpolymer of carbon monoxide and ethylene and propene is prepared by reacting palladium acetate, trifluoroacetic acid and ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene) Bis (2-methoxyphenyl) phosphine). 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 85 to 15. The polyketone terpolymer had a melting point of 235 DEG C and an LVN of 2.0 dl / g measured by HFIP (hexa-fluoroisopropano) at 25 DEG C and an MWD of 2.0.
The polyketone terpolymer prepared above was molded into pellets on an extruder using a twin screw having a diameter of 40 mm and L / D = 32 operating at 250 rpm and injection molded to prepare specimens of hose connectors.
Example 2
The linear alternating polyketone terpolymer of carbon monoxide and ethylene and propene is prepared by reacting palladium acetate, trifluoroacetic acid and ((2,2-dimethyl-1,3-dioxane-5,5-diyl) bis (methylene) Bis (2-methoxyphenyl) phosphine). 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 85 to 15. The polyketone terpolymer had a melting point of 225 DEG C, an LVN of 2.0 dl / g measured by HFIP (hexa-fluoroisopropano) at 25 DEG C, and an MWD of 2.0.
The polyketone terpolymer prepared above was molded into pellets on an extruder using a twin screw having a diameter of 40 mm and L / D = 32 operating at 250 rpm and injection molded to prepare specimens of hose connectors.
Comparative Example One
The polyoxymethylene resin was produced in the form of pellets on an extruder using a twin screw having a diameter of 40 mm and L / D = 32, which was operated at 250 rpm, and then injection molded to prepare a specimen .
Property evaluation
The properties of the hose connectors manufactured in Examples 1 and 2 and Comparative Example 1 were evaluated by the following methods. The results are shown in Table 1 below.
1) Evaluation of Impact Strength: ASTM D256. At this time, it was measured at -30 캜.
2) Evaluation of tensile properties: ASTM D638. At this time, it was measured at -30 캜.
3) Evaluation of freezing test: The hose connector was filled with water, cooled at minus 30 ° C, and then allowed to stand for 24 hours to confirm the breakage.
As can be seen from the above Table 1, in the case of Examples, the low temperature tensile elongation and the impact strength were superior to the Comparative Examples, and the freezing test was also good in the Examples. Therefore, the polyketone hose connector manufactured through the embodiment of the present invention exhibits a better low-temperature tensile elongation and impact resistance than the comparative example, and thus is more suitable for application to a hose connector.
Claims (4)
The ligand of the catalyst composition used in the polymerization of the polyketone copolymer is a bis (methylene) bis (bis (2-methoxyphenyl) -1,3-dioxane-5,5- ) ≪ / RTI > phosphine)
Wherein the polyketone hose connector has a low temperature impact strength of 4.8 to 7.0 kJ / m 2 at -30 캜.
[Formula 1]
- (CH2CH2-CO) x-
[Formula 2]
- (CH2CH (CH3) -CO) y-
(x and y are mole% of each of the general formulas (1) and (2) in the polymer)
Wherein the polyketone copolymer has a molar ratio of ethylene to propylene in the range of 99: 1 to 85:15.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150074032A KR101734890B1 (en) | 2015-05-27 | 2015-05-27 | Polyketone hose connector |
| PCT/KR2015/011027 WO2016072642A2 (en) | 2014-11-07 | 2015-10-19 | Polyketone resin composition with excellent impact resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150074032A KR101734890B1 (en) | 2015-05-27 | 2015-05-27 | Polyketone hose connector |
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| Publication Number | Publication Date |
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| KR20160139369A KR20160139369A (en) | 2016-12-07 |
| KR101734890B1 true KR101734890B1 (en) | 2017-05-24 |
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|---|---|---|---|
| KR1020150074032A KR101734890B1 (en) | 2014-11-07 | 2015-05-27 | Polyketone hose connector |
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| Country | Link |
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| KR (1) | KR101734890B1 (en) |
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