WO2016093465A1 - 자동차용 열가소성 수지 조성물 및 이로부터 제조된 자동차용 성형품 - Google Patents
자동차용 열가소성 수지 조성물 및 이로부터 제조된 자동차용 성형품 Download PDFInfo
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- WO2016093465A1 WO2016093465A1 PCT/KR2015/008831 KR2015008831W WO2016093465A1 WO 2016093465 A1 WO2016093465 A1 WO 2016093465A1 KR 2015008831 W KR2015008831 W KR 2015008831W WO 2016093465 A1 WO2016093465 A1 WO 2016093465A1
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- thermoplastic resin
- resin composition
- polyamide
- chelating agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/10—Metal compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/092—Polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/175—Amines; Quaternary ammonium compounds containing COOH-groups; Esters or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Definitions
- the present invention relates to a thermoplastic resin composition for automobiles, and more particularly, to a polyamide-based resin composition having excellent long-term heat stability for use in automobile parts.
- Polyamide resins have excellent performance in heat resistance, abrasion resistance, chemical resistance, and flame retardancy, and are used in a wide range of fields such as electric parts, electronic parts, and automobile parts.
- plasticization of metal parts is in progress according to the trend of light weight in the automobile field, and especially polyamide resins having excellent heat resistance because parts near the engine room, which are under the hood area of the car, are exposed to high temperature environment for a long time.
- the composition is used.
- organic antioxidants such as phenolic or phosphite are widely used to secure long-term heat stability of the polyamide resin composition, but there is a limit to improving the property of maintaining excellent physical properties at high temperatures for a long time to a satisfactory level. .
- copper halide-based heat stabilizers such as CuI / KI mixtures, which are known to have excellent long-term heat stability at high temperatures compared to organic antioxidants, are used, copper may discolor or precipitate over time. Problems can arise when used in electronic, automotive and automotive components.
- An object of the present invention is to solve such a conventional problem, an object of the present invention is to provide a thermoplastic resin composition for automobiles excellent in long-term heat stability and processability that can maintain mechanical strength for a long time.
- thermoplastic resin composition for automobiles is an aliphatic polyamide resin;
- a first chelating agent comprising at least one carboxylic acid or a salt thereof and an amino group;
- a second chelating agent comprising an aliphatic polyvalent carboxylic acid of C1 to C10 (without carbon of the carboxyl group) having 2 to 4 carboxyl groups;
- And fillers are included in a thermoplastic resin composition for automobiles according to an embodiment of the present invention.
- the aliphatic polyamide resin may include at least one of polyamide 6 and polyamide 66.
- the automotive thermoplastic resin composition may include 30 to 80% by weight of the aliphatic polyamide; 0.1 to 1% by weight of the first chelating agent; 0.1 to 5% by weight of the second chelating agent; And it may include 10 to 65% by weight of the filler.
- the thermoplastic resin composition for automobiles may include 1 to 20% by weight of the polyamide 6; 30 to 70% by weight of the polyamide 66; 0.1 to 1% by weight of the first chelating agent; 0.1 to 5% by weight of the second chelating agent; And it may include 10 to 65% by weight of the filler.
- the weight ratio of the polyamide 6 and the polyamide 66 may be 1: 2 to 1:25.
- the aliphatic polyamide resin may have a glass transition temperature (Tg) of 30 to 80 ° C.
- the filler may be glass fiber.
- the first chelating agent is ethylenediamine-N, N, N ', N'-tetraacetic acid (EDTA), ethylene glycol bis (2-aminoethylether) -N, N, N', N'-tetraacetic acid (EGTA), CyDTA (trans-1,2-diaminocyclohexane-N, N, N ', N'-tetraacetic acid), DTPA (diethylenetriamine pentaacetic acid), TETHA (triethylenetetraamine-N, N, N', N ", N '", N' "-hexaacetic acid), HEDTA (N- (2-hydroxyethyl) ethylenediaminetriacetic acid) and any one selected from the group consisting of metal salts thereof.
- EDTA ethylenediamine-N, N, N ', N'-tetraacetic acid
- EGTA ethylene glycol bis (2-aminoethylether) -N,
- the first chelating agent is sodium (Na), aluminum (Al), iron (Fe), copper (Cu), zinc (Zn), tin (Sn), titanium (Ti), nickel (Ni), antimony (Sb ), A metal salt including at least one metal ion selected from magnesium (Mg), vanadium (V), chromium (Cr) or zirconium (Zr) ions.
- the second chelating agent is fumaric acid, succinic acid, 3,3-diethylsuccinic acid, malonic acid, dimethylmalonic acid, tartaric acid, maleic acid, citric acid, malic acid, adipic acid, 2-methyladipic acid, trimethyladipic acid, Itaconic acid, glutaric acid, 2,2-dimethylglutaric acid, pimelic acid, azelaic acid, dimer acid, sebacic acid, suberic acid, decandicarboxylic acid, dodecanedicarboxylic acid, citraconic acid, tetrahydro Phthalic acid, 1,2,3,4-butanetetracarboxylic acid, oxalic acid, and combinations thereof.
- Automobile molded article according to the present invention can be produced from the above-mentioned thermoplastic resin composition.
- tensile strength after 500 hours in 220 °C a 1 may be represented by the following formula 1.
- a second For the automotive molded article with respect to the initial tensile strength of a 0, measured according to the evaluation method of ASTM D638, tensile strength after 1,000 at 220 °C time, a second can be represented by the following formula 2.
- thermoplastic resin composition for automobiles 5 g was weighed in a Petri dish and closed with a dish cap, and then placed on a hot plate at a temperature of 330 ° C. for 2 hours.
- the volatile material to be adsorbed may be 200 to 800 ppm.
- the molded article may be at least one of internal parts of the under hood.
- the molded article may be a battery fuse, a turbo resonator or an intercooler tank.
- thermoplastic resin composition for automobiles of the present invention can stably maintain initial physical properties at high temperatures for a long time, and thus has excellent long-term heat stability.
- thermoplastic resin composition for automobiles there is an advantage that the amount of gas generated at the time of processing the thermoplastic resin composition for automobiles is easy to process.
- thermoplastic resin composition for automobiles of the present invention will be described.
- Automotive thermoplastic resin composition includes an aliphatic polyamide resin, a chelating agent and a filler, the chelating agent may include a first chelating agent and a second chelating agent.
- the chelating agents are distinguished by naming the 'first' and the 'second', respectively, but are merely terms for distinguishing types of chelating agents, and do not affect the interpretation of the scope of rights.
- thermoplastic resin composition for automobiles According to an embodiment of the present invention will be described in detail.
- the aliphatic polyamide resin is a polyamide which does not contain an aromatic ring in the molecular chain, and may contain an aliphatic group having 10 to 20 carbon atoms.
- the aliphatic polyamide resin may be a homopolymer, copolymer, terpolymer or more polymer formed from aminocarboxylic acid, lactam or diamine and dicarboxylic acid, wherein the copolymer is two or more amides and // Or polyamide having a diamide molecule repeating unit.
- the aminocarboxylic acid may be an aminocarboxylic acid having 6 to 12 carbon atoms, and specifically, 6-aminocapronic acid, 7-aminoheptanoic acid, 9-aminononanoic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, and the like. This may be included.
- the lactam may be a lactam having 4 to 12 carbon atoms, and specifically, ⁇ -pyrrolidone, ⁇ -caprolactam, ⁇ -laurolactam, or ⁇ -enantholactam may be included.
- the diamine may be aliphatic or cycloaliphatic diamine, and specifically, the diamine includes tetramethylenediamine, hexamethylenediamine, 2-methylpentamethylenediamine, nonamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4 -Trimethylhexamethylenediamine, 2,4,4-trimethylhexamethylenediamine, 5-methylnonamethylenediamine, 1,3-bis (aminomethyl) cyclohexane, 1,4-bis (aminomethyl) cyclohexane, 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane, bis (4-aminocyclohexyl) methane, bis (3-methyl-4-aminocyclohexyl) methane, 2,2-bis ( 4-aminocyclohexyl) propane, bis (aminopropyl) piperazine, aminoethylpiperazine, bis (p
- the dicarboxylic acid may be aliphatic or cycloaliphatic dicarboxylic acid, and such dicarboxylic acid may include adipic acid, 2-methyladipic acid, trimethyladipic acid, glutaric acid, 2,2-dimethylglutaric acid. , Pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, 1,4-cyclohexanedicarboxylic acid, malonic acid, dimethylmalonic acid, succinic acid or 2,2-diethylsuccinic acid, and the like. May be included.
- the aliphatic polyamide resin is polyamide 6, polyamide 66, polyamide 46, polyamide 610, polyamide 612, polyamide 11, polyamide 12, polyamide 910, polyamide 912, polyamide 913, polyamide 914, Polyamide 915, Polyamide 616, Polyamide 936, Polyamide 1010, Polyamide 1012, Polyamide 1013, Polyamide 1014, Polyamide 1210, Polyamide 1212, Polyamide 1213, Polyamide 1214, Polyamide 614, Polyamide 613, polyamide 615, polyamide 616 or polyamide 613 may be used, and may be used alone or in combination of two or more.
- Polyamide 6 or polyamide 66 may be used as a preferred embodiment of the aliphatic polyamide resin, and more preferably, polyamide 6 and polyamide 66 may be mixed.
- the aliphatic polyamide resin may include 30 to 80 wt% of the total weight of the aliphatic polyamide resin, the first chelating agent, the second chelating agent, and the filler.
- the polyamide 6 when polyamide 6 and polyamide 66 are mixed and used as the aliphatic polyamide resin, the polyamide 6 is 1 based on the total weight of the aliphatic polyamide resin, the first chelating agent, the second chelating agent and the filler. To 20% by weight, the polyamide 66 may comprise 30 to 70% by weight.
- the weight ratio of the polyamide 6 and the polyamide 66 may be 1: 2 to 1:25, preferably 1: 4 to 1:15.
- the aliphatic polyamide resin may have a glass transition temperature (Tg) of 30 to 80 ° C, preferably 35 to 50 ° C.
- Tg glass transition temperature
- the melting point of the aliphatic polyamide resin may be used that is 160 to 230 °C.
- the number average molecular weight (Mn) of the aliphatic polyamide resin is not particularly limited, but is preferably 10,000 to 200,000 g / mol, more preferably 20,000 to 150,000 g / mol.
- thermoplastic resin composition for automobiles may use two kinds of chelating agents including a first chelating agent and a second chelating agent.
- the first chelating agent may comprise an amino group with at least one of the carboxylic acids or salts thereof.
- the first chelating agent is a compound having a functional group capable of forming a bond with a metal ion in its molecular structure, and may combine with a cation of a metal salt dissociated into a cation and an anion to form a stabilized chelate complex.
- the said 1st chelating agent can be used individually or in mixture of 2 or more types of compounds which have a polyvalent carboxyl group.
- the compound having a polycarboxylic acid or a carboxylate group may be a compound including a functional group represented by the following Formula 1a, 1b or 1c.
- EDTA ethylenediamine-N, N, N ', N'-tetraacetic acid
- EGTA ethylene glycol bis (2-aminoethylether) -N, N, N ', N'-tetraacetic acid
- CyDTA trans-1,2-diaminocyclohexane-N, N, N', N'-tetraacetic acid
- DTPA diethylene triamine pentaacetic acid
- TETHA triethylenetetraamine-N, N, N ', N ", N'", N '"-hexaacetic acid
- HEDTA N- (2-hydroxyethyl) ethylenediamine triacetic acid
- metal salts thereof and may be selected from the group consisting of two or more Can be.
- Metal ions forming a bond in the first chelating agent are sodium (Na), aluminum (Al), iron (Fe), copper (Cu), zinc (Zn), tin (Sn), titanium (Ti), nickel ( Ni, antimony (Sb), magnesium (Mg), vanadium (V), chromium (Cr), zirconium (Zr) ions may be at least one.
- the metal ion used by the 1st chelating agent of this invention is not limited to the said ion, Of course, all the metal ion which shows the same effect can be used. Preferably it may be EDTA-2Na (ethylenediamine tetraacetic acid-disodium salt).
- the first chelating agent may be included 0.1 to 1% by weight, preferably 0.5 to 0.9% by weight relative to the total weight of the aliphatic polyamide resin, the first chelating agent, the second chelating agent and the filler.
- the first chelating agent is less than 0.1% by weight, the improvement of long-term heat resistance is insignificant.
- the first chelating agent is more than 1% by weight, the amount of gas generated during the manufacturing process of the thermoplastic resin composition increases, resulting in poor workability, and the mechanical strength of the thermoplastic resin composition. There is a problem that discoloration easily occurs.
- the second chelating agent may include C1 to C10 (not including carbon of the carboxyl group) aliphatic polyvalent carboxylic acid having 2 to 4 carboxyl groups.
- C1 to C10 not including carbon of the carboxyl group
- aliphatic polyvalent carboxylic acid having 2 to 4 carboxyl groups.
- Two or more kinds of aliphatic polyhydric carboxylic acids may be mixed and used, and derivatives of carboxylic acids such as acid anhydrides, acid chlorides and esters thereof may be used.
- the aliphatic polyhydric carboxylic acid used in the second chelating agent of the present invention is not limited to the above, and it is a matter of course that any of those having the same effect can be used.
- it may be citric acid (citiric acid).
- the second chelating agent may be included in an amount of 0.1 to 5% by weight based on the total weight of the aliphatic polyamide resin, the first chelating agent, the second chelating agent and the filler.
- the second chelating agent When the second chelating agent is in the above range, it may stably contribute to the long-term heat stability improvement effect together with the first chelating agent.
- the first chelating agent and the second chelating agent oxidize the surface during aging at high temperature to promote the formation of char on the surface, thereby preventing the penetration of the oxide layer into the thermoplastic resin to prevent decomposition of the thermoplastic resin. This can bring about the effect of improving the long-term heat stability.
- the thermoplastic resin composition for automobiles includes a filler, and by controlling the addition amount of the filler to obtain a desired level of mechanical strength.
- Glass filler may be preferably used as the filler.
- the glass fiber is a conventional one used in the art, a diameter of 8 to 20 ⁇ m, and a length of 1.5 to 8mm can be used.
- a diameter of 8 to 20 ⁇ m, and a length of 1.5 to 8mm can be used.
- the glass fiber may be used in combination with a fiber selected from the group consisting of carbon fibers, basalt fibers, fibers made from biomass, and combinations thereof.
- the biomass means a living organism using a plant or microorganism as an energy source.
- the glass fiber may be a circular cross-section, elliptical, rectangular or a dumbbell-shaped two connected two circles.
- the glass fiber may be one having an aspect ratio of less than 1.5, and specifically, a circular shape having an aspect ratio of 1 may be used.
- the aspect ratio is then defined as the ratio of the longest diameter to the smallest diameter in the cross section of the glass fiber.
- the glass fiber may be surface treated with a predetermined sizing material to prevent the reaction with the resin and improve the degree of impregnation.
- Surface treatment of the glass fiber may be carried out at the time of manufacturing the glass fiber or in a later step.
- the filler may be used together with the second chelating agent to further increase the long-term heat stability improvement effect.
- filaments such as hair may be subjected to a surface treatment process in which the surface is coated by sizing in manufacturing the glass fiber.
- sizing is used to protect the filament from friction occurring at the contact surface of all processes through which the glass fiber passes or to give a function to facilitate the bonding of the glass fiber and the resin.
- the first chelating agent and the second chelating agent may improve long-term heat stability by reacting with the sizing material of the glass fiber.
- the strength of the glass fiber may be determined according to the structure of the silicate network.
- Alkali oxide of the glass fiber is not easily incorporated into the structure of the silicate network, thereby causing a decrease in strength.
- the strength can be maintained even when exposed to high temperature for a long time by combining the sizing material of the glass fiber and suppressing the action of the alkali oxide.
- the filler may be 10 to 65% by weight relative to the total weight of the aliphatic polyamide resin, the first chelating agent, the second chelating agent and the filler.
- the automotive thermoplastic resin composition may further include an additive according to each use.
- additives dyes, pigments, heat stabilizers, ultraviolet stabilizers, lubricants, antibacterial agents, mold release agents, nucleating agents, antistatic agents, antioxidants or inorganic additives may be used, but are not necessarily limited thereto. These can be used individually or in mixture of 2 or more types.
- thermoplastic resin composition for automobiles described above has excellent impact strength and workability by using an aliphatic polyamide resin, and has excellent wear resistance of aliphatic polyamide resin, which is excellent in long-term heat stability by using a first chelating agent and a second chelating agent. It does not degrade other physical properties such as chemical resistance, flame resistance, and mechanical strength.
- thermoplastic resin composition for automobiles according to the present invention can be produced by a known method.
- it may be prepared in the form of pellets by a method of simultaneously mixing the components of the present invention and other additives and then melt extrusion in an extruder.
- thermoplastic resin composition for automobiles may be preferably applied to a molded article requiring heat resistance, and may be applied regardless of the type of molded article requiring heat resistance.
- Molded article according to an embodiment of the present invention has excellent long-term heat stability, with respect to the initial tensile strength a 0 measured according to the evaluation method of ASTM D638, tensile strength a 1 after 500 hours at 220 ° C is represented by the following formula 1 Can be expressed.
- the tensile strength a 2 after 1,000 hours at 220 °C with respect to the initial tensile strength a 0 measured according to the evaluation method of ASTM D638 can be expressed by the following formula (2).
- the molded article is excellent in processability, when the molded article is weighed in a Petri dish (5g) and closed with a dish cap, and then placed on a hot plate at a temperature of 330 ° C. for 2 hours,
- the volatile material adsorbed on the dish cap may be 200 to 800 ppm, and preferably 250 to 700 ppm.
- the molded article may be applied to a water temperature controller, a thermostat housing, a fuel rail, or the like, and the scope of application is not limited thereto.
- thermoplastic resin composition for automobiles of this invention is shown.
- thermoplastic resin compositions of the following Examples and Comparative Examples are as follows.
- TP-H9008 a CuI / KI mixture from Brueggemann, was used.
- the components shown in Table 1 were put into a mixer and dry mixed. Then, the L / D was 45 and ⁇ was put in a twin screw extruder, and a thermoplastic resin composition in pellet form was prepared through the extruder. The prepared pellets were prepared for the evaluation of physical properties using a 10oz injection molding machine set at 280 ° C.
- thermoplastic resin compositions of Examples 1 to 6 and Comparative Examples 1 to 10 were evaluated.
- the evaluation method of the evaluation item is as follows, and the evaluation result of each item is described in Table 2.
- thermoplastic resin compositions (polyamide 6 (a-1) of Examples 1 to 6 and Comparative Examples 1 to 10 cannot be evaluated at a melting point of 220 ° C., and Comparative Example 4 was excluded from the evaluation).
- Some of the prepared specimens were left at a temperature of 23 ° C. and a relative humidity of 50% for 48 hours, and the initial tensile strength (a 0 ) was measured according to ASTM D638. At this time, the tensile strength measurement rate was 5 mm / min. Then, the tensile strength (a 1 ) after leaving the rest of each specimen for 500 hours at 220 °C was measured. Long-term heat stability was evaluated by the tensile strength retention calculated using Equation 3 below.
- thermoplastic resin compositions (polyamide 6 (a-1) of Examples 1 to 6 and Comparative Examples 1 to 10 cannot be evaluated at a melting point of 220 ° C., and Comparative Example 4 was excluded from the evaluation).
- Some of the prepared specimens were left at a temperature of 23 ° C. and a relative humidity of 50% for 48 hours, and then the initial tensile strength (a 0 ) was measured according to ASTM D638. At this time, the tensile strength measurement rate was 5 mm / min. Then, the tensile strength (a 2 ) after leaving the rest of each specimen for 1,000 hours at 220 °C was measured. Long-term heat stability was evaluated by the tensile strength retention calculated using Equation 4 below.
- Examples 1 to 6 and Comparative Examples 1 to 10 (polyamide 6 (a-1) is a pellet prepared using the thermoplastic resin composition of the melting point 220 ° C cannot be evaluated, Comparative Example 4 was excluded from the evaluation) was weighed 5g in a Petri dish, closed with a dish cap, and then placed on a hot plate at 330 ° C. for 2 hours to measure the amount of volatiles adsorbed on the dish cap. . Gas generation amount was calculated using Equation 5 below.
- C is the dish cap weight after the evaluation
- C 0 is the dish cap weight before the evaluation
- S is the pellet sample weight used for the evaluation
- thermoplastic resin compositions of Examples 1 to 6 were excellent in mechanical properties such as long-term heat stability, and gas generation amount was small, and thus, excellent workability.
- the type and content of aliphatic polyamide and the type and content of chelating agent are factors that greatly affect the long-term heat resistance and processability of the thermoplastic resin composition of the present invention.
- thermoplastic resin composition for automobiles according to the present invention has excellent long-term heat stability, and even when exposed to high temperature for a long time, mechanical properties are maintained, and thus it can be easily applied to parts around an engine room which is an under hood area of an automobile.
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Abstract
Description
구성성분 | |||||||
(a-1) | (a-2) | (b-1) | (b-2) | (c) | (d) | ||
실시예 | 1 | 5 | 58.5 | 0.5 | 1 | 35 | - |
2 | 5 | 57.5 | 0.5 | 2 | 35 | - | |
3 | 10 | 53.5 | 0.5 | 1 | 35 | - | |
4 | 10 | 52.5 | 0.5 | 2 | 35 | - | |
5 | 5 | 58.5 | 0.9 | 1 | 35 | - | |
6 | 5 | 54.5 | 0.5 | 5 | 35 | - | |
비교예 | 1 | - | 64.8 | - | - | 35 | 0.2 |
2 | - | 63.5 | 0.5 | 1 | 35 | - | |
3 | - | 62.5 | 0.5 | 2 | 35 | - | |
4 | 65 | - | - | - | 35 | - | |
5 | 25 | 38.5 | 0.5 | 1 | 35 | - | |
6 | 2 | 61.5 | 0.5 | 1 | 35 | - | |
7 | 5 | 57 | 2 | 1 | 35 | - | |
8 | 5 | 52.5 | 0.5 | 7 | 35 | - | |
9 | 5 | 59.5 | 0.5 | - | 35 | - | |
10 | 5 | 59 | - | 1 | 35 | - |
장기내열성(1) | 장기내열성(2) | 가스 발생량(ppm) | ||||||
초기인장강도(kg/cm2) | 500시간경과 후인장강도(kg/cm2) | 500시간 후인장강도유지율(%) | 초기인장강도(kg/cm2) | 1,000시간 경과 후인장강도(kg/cm2) | 1,000시간 후 인장강도 유지율(%) | |||
실시예 | 1 | 1899 | 1947 | 103 | 1899 | 1577 | 83 | 330 |
2 | 1918 | 1897 | 99 | 1918 | 1726 | 90 | 460 | |
3 | 1817 | 1811 | 105 | 1817 | 1544 | 85 | 520 | |
4 | 1781 | 1727 | 97 | 1781 | 1639 | 92 | 610 | |
5 | 1901 | 1806 | 95 | 1901 | 1635 | 86 | 310 | |
6 | 1922 | 1884 | 98 | 1822 | 1634 | 85 | 650 | |
비교예 | 1 | 2132 | 1101 | 52 | 2132 | 536 | 25 | 230 |
2 | 2107 | 1197 | 57 | 2107 | 615 | 29 | 350 | |
3 | 2000 | 1234 | 62 | 2000 | 628 | 31 | 440 | |
4 | 1821 | 측정불가 | - | 1821 | 측정불가 | - | 측정불가 | |
5 | 1765 | 1677 | 95 | 1765 | 1482 | 84 | 1350 | |
6 | 2008 | 1104 | 55 | 2008 | 623 | 31 | 370 | |
7 | 1858 | 1802 | 97 | 1858 | 1560 | 84 | 1080 | |
8 | 1779 | 1619 | 91 | 1779 | 1459 | 82 | 1770 | |
9 | 1993 | 1156 | 58 | 1993 | 638 | 32 | 420 | |
10 | 1828 | 1042 | 57 | 1828 | 548 | 30 | 510 |
Claims (15)
- 지방족 폴리아미드 수지;카르복실산 또는 그 염 중 적어도 하나와 아미노기를 포함하는 제1 킬레이트제;카르복실기를 2 내지 4개 갖는 C1 내지 C10(카르복실기의 탄소를 포함하지 않음)의 지방족 다가 카르복실산을 포함하는 제2 킬레이트제; 및충진제를 포함하는 자동차용 열가소성 수지 조성물.
- 제1항에 있어서,상기 지방족 폴리아미드 수지는, 폴리아미드 6, 폴리아미드 66 중 적어도 하나를 포함하는 자동차용 열가소성 수지 조성물.
- 제1항에 있어서,상기 자동차용 열가소성 수지 조성물은,상기 지방족 폴리아미드 30 내지 80중량%;상기 제1 킬레이트제 0.1 내지 1중량%;상기 제2 킬레이트제 0.1 내지 5중량%; 및상기 충진제 10 내지 65중량%를 포함하는 자동차용 열가소성 수지 조성물.
- 제2항에 있어서,상기 자동차용 열가소성 수지 조성물은,상기 폴리아미드 6 1 내지 20중량%;상기 폴리아미드 66 30 내지 70중량%;상기 제1 킬레이트제 0.1 내지 1중량%;상기 제2 킬레이트제 0.1 내지 5중량%; 및상기 충진제 10 내지 65중량%를 포함하는 자동차용 열가소성 수지 조성물.
- 제4항에 있어서,상기 폴리아미드 6 및 상기 폴리아미드 66의 중량비가 1:2 내지 1:25인 자동차용 열가소성 수지 조성물.
- 제1항에 있어서,상기 지방족 폴리아미드 수지는 유리전이온도(Tg)가 30 내지 80℃인 자동차용 열가소성 수지 조성물.
- 제1항에 있어서,상기 충진제는 유리섬유인 자동차용 열가소성 수지 조성물.
- 제1항에 있어서,상기 제1 킬레이트제는 EDTA(ethylenediamine-N,N,N',N'-tetraacetic acid), EGTA(ethylene glycol bis(2-aminoethylether)-N,N,N',N'-tetraacetic acid), CyDTA(trans-1,2-diaminocyclohexane-N,N,N',N'-tetraacetic acid), DTPA(diethylenetriamine pentaacetic acid), TETHA(triethylenetetraamine-N,N,N',N",N'",N'"-hexaacetic acid), HEDTA(N-(2-hydroxyethyl)ethylenediaminetriacetic acid) 및 이들의 금속염으로 이루어진 군으로부터 선택된 어느 하나 이상인 자동차용 열가소성 수지 조성물.
- 제8항에 있어서,상기 제1 킬레이트제는 나트륨(Na), 알루미늄(Al), 철(Fe), 구리(Cu), 아연(Zn), 주석(Sn), 티탄(Ti), 니켈(Ni), 안티모니(Sb), 마그네슘(Mg), 바나듐(V), 크롬(Cr) 또는 지르코늄(Zr) 이온에서 선택되는 적어도 하나 이상의 금속 이온을 포함하는 금속염인 자동차용 열가소성 수지 조성물.
- 제1항에 있어서,상기 제2 킬레이트제는 푸마르산, 숙신산, 3,3-디에틸숙신산, 말론산, 디메틸말론산, 타르타르산, 말레산, 시트르산, 말산, 아디프산, 2-메틸아디프산, 트리메틸아디프산, 이타콘산, 글루타르산, 2,2-디메틸글루타르산, 피멜산, 아젤라인산, 다이머산, 세바스산, 수베르산, 데칸디카르복실산, 도데칸디카르복실산, 시트라콘산, 테트라하이드로프탈산, 1,2,3,4-부탄테트라카르복실산, 옥살산 및 이들의 조합으로 이루어진 군에서 선택되는 자동차용 열가소성 수지 조성물.
- 제1항 내지 제10항 중 어느 한 항에 의한 자동차용 열가소성 수지 조성물로부터 제조된 자동차용 성형품.
- 제11항에 있어서,상기 자동차용 열가소성 수지 조성물을 페트리 디쉬(Petri dish)에 5g 계량하여 디쉬 캡(dish cap)으로 닫은 후, 2시간 동안 330℃ 온도의 핫 플레이트(hot plate) 위에 올려놓았을 때, 상기 디쉬 캡에 흡착되는 휘발물질이 200 내지 800ppm인 자동차용 성형품.
- 제11항에 있어서,상기 자동차용 성형품은 수온 조절기, 서모스탯 하우징 또는 연료 레일인 자동차용 성형품.
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US15/533,047 US10266692B2 (en) | 2014-12-09 | 2015-08-24 | Automobile-use thermoplastic resin composition, and automobile-use molded product manufactured therefrom |
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US10081719B2 (en) | 2014-05-29 | 2018-09-25 | Lotte Advanced Materials Co., Ltd. | Thermoplastic resin composition for automobiles and molded product produced from the same |
US10266692B2 (en) | 2014-12-09 | 2019-04-23 | Lotte Advanced Materials Co., Ltd. | Automobile-use thermoplastic resin composition, and automobile-use molded product manufactured therefrom |
US10316188B2 (en) | 2014-12-19 | 2019-06-11 | Lotte Advanced Materials Co., Ltd. | Thermoplastic resin composition and molded part for automobiles using the same |
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