Resin composition and molded product

Abstract

To provide a resin composition based on polyamide resin containing a terpolymer of ethylene-alkyl(meth)acrylate-unsaturated dicarboxylic anhydride having better impact resistance than conventional products.SOLUTION: The inventors have conducted intensive studies in order to solve the problem, and found out that a dispersion state of a terpolymer of ethylene-alkyl(meth)acrylate-unsaturated dicarboxylic anhydride could be optimized by making alkyl(meth)acrylate content a high content and making the content of unsaturated dicarboxylic anhydride an optimum content in the terpolymer to make it possible to further improve impact resistance. Further, the inventors also found out that further improvement effect of impact resistance strength and flowability could be obtained by allowing a resin composition to contain antiblocking agent.

Description

Technical Field

[0001] The present invention relates to a resin composition based on a polyamide resin and a molded article obtained from the resin composition.

Background Art

[0002] Many studies have been conducted on the impact resistance modification of polyamides. In commercially available products, the impact resistance modifiers used are basically mainly olefin rubbers. For compatibilization with a polyamide (PA) matrix, functionalized olefin rubbers (for example, EPDM-g-MA, EPR-g-MA, SBS-g-MA, etc.) are generally used.

[0003] Also, it is known that a composition having a polyamide and an ethylene-based polymer as a matrix has excellent impact strength, and it was also known that the impact resistance of polyamide is improved by a terpolymer of ethylene-alkyl (meth) acrylate-unsaturated dicarboxylic anhydride (for example, maleic anhydride).

[0004] However, in a blend composition of ethylene-alkyl (meth) acrylate-unsaturated dicarboxylic anhydride and a polyamide resin, the impact resistance is still not sufficient, and further improvement in impact resistance has been desired.

Disclosure of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a resin composition based on a polyamide resin containing a terpolymer of ethylene-alkyl (meth) acrylate-unsaturated dicarboxylic anhydride, which is superior in impact resistance to conventional products.

Means for Solving the Problems

[0006] In order to solve the above problems, the inventors intensively studied and found that in a terpolymer of ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride, by increasing the content of alkyl (meth)acrylate and optimizing the content of unsaturated dicarboxylic anhydride, the dispersion state of the terpolymer can be optimized and further improvement in impact resistance is possible. They also found that an effect of improving impact resistance can be obtained by incorporating an anti-blocking agent, and thus completed the present invention.

[0007] That is, the present invention provides: [1] A resin composition based on a polyamide resin containing 5% to 40% by weight of the following component (A), 95% to 60% by weight of component (B), and component (C) (wherein the total of component (A) and component (B) is 100% by weight), Component (A): At least one ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer. Component (B): Polyamide 6 or polyamide 66 Component (C): An anti-blocking agent, and its content is 500 to 10,000 ppm based on 100 parts by weight of all resin components. Here, when the terpolymer as component (A) is composed of 59.0 wt% to 74.9 wt% of units derived from ethylene, 25.0 wt% to 40.0 wt% of units derived from at least one alkyl (meth)acrylate, and 0.1 wt% to 1.0 wt% of units derived from at least one unsaturated dicarboxylic anhydride, the resin composition may not contain the anti-blocking agent. [2] The resin composition according to [1], wherein the unit derived from the alkyl (meth)acrylate constituting the terpolymer and / or the copolymer is at least one selected from the group consisting of methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, methyl methacrylate, and ethyl methacrylate. [3] The resin composition according to [1] or [2], wherein the unit of the unsaturated dicarboxylic anhydride constituting the terpolymer is maleic anhydride. [4] The resin composition according to any one of [1] to [3], wherein the terpolymer is composed of 59.0 wt% to 74.9 wt% of units derived from ethylene, 25.0 wt% to 40.0 wt% of units derived from at least one alkyl (meth)acrylate, and 0.1 wt% to 1.0 wt% of units of at least one unsaturated dicarboxylic anhydride. [5] The resin composition according to any one of [1] to [4], wherein the melt flow rate of the terpolymer measured according to JIS standard K7210 (190 °C / load 2.16 kg) is 1 to 50 g / 10 min. [6] A molding method of the resin composition according to any one of [1] to [5], which consists of extrusion molding or injection molding. [7] A molded article obtained by molding the resin composition according to any one of [1] to [5] by extrusion molding or injection molding. It is provided. [Advantages of the Invention]

[0008] According to the present invention, it is possible to provide a resin composition based on a polyamide resin containing a terpolymer of ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride, which is superior in impact resistance to conventional products. [Embodiments for Carrying Out the Invention]

[0009] The present invention will be described in detail below. However, the present invention is not limited to the following embodiments, and can be variously modified and implemented within the scope of the gist. In the present specification, when the expression "~" is used, it is used as an expression including the numerical values or physical property values before and after it.

[0010] An embodiment of the present invention is a resin composition based on a polyamide resin containing 5% to 40% by weight of the following component (A), 95% to 60% by weight of component (B), and component (C) (hereinafter also referred to as "the resin composition of the present invention"), where the total of component (A) and component (B) is 100% by weight. Component (A): At least one ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer Component (B): Polyamide 6 or polyamide 66 Component (C): An antiblocking agent, and its content is 500 to 10,000 ppm based on 100 parts by weight of all resin components. Here, when the terpolymer as component (A) is composed of 59.0 wt% to 74.9 wt% of units derived from ethylene, 25.0 wt% to 40.0 wt% of units derived from at least one alkyl (meth)acrylate, and 0.1 wt% to 1.0 wt% of units of at least one unsaturated dicarboxylic anhydride, the resin composition may not contain the antiblocking agent. Each component of the resin composition of the present invention will be described in detail below.

[0011] (1) Component (A) Component (A) contained in the resin composition of the present invention is at least one ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer. The ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer (hereinafter also abbreviated as "terpolymer") used in the present invention is a terpolymer of units (comonomers) derived from alkyl (meth)acrylate, units (comonomers) derived from unsaturated dicarboxylic anhydride, and ethylene.

[0012] The units (comonomers) derived from alkyl (meth)acrylate are selected from the group consisting of methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, methyl methacrylate, and ethyl methacrylate. Among them, methyl acrylate and methyl methacrylate are preferred. The unit derived from alkyl (meth)acrylate contained in the above-mentioned terpolymer may be one kind or two or more kinds.

[0013] Examples of the unit of the unsaturated dicarboxylic anhydride include maleic anhydride, fumaric anhydride, citraconic anhydride, itaconic anhydride, etc., and maleic anhydride is preferred. The unit of the unsaturated dicarboxylic anhydride contained in the above-mentioned terpolymer may be one kind or two or more kinds.

[0014] Specific examples of the above-mentioned terpolymer include ethylene-methyl acrylate-maleic anhydride terpolymer, ethylene-ethyl acrylate-maleic anhydride terpolymer, ethylene-methyl methacrylate-maleic anhydride terpolymer, and ethylene-ethyl methacrylate-maleic anhydride terpolymer. Among them, ethylene-methyl acrylate-maleic anhydride terpolymer and ethylene-methyl methacrylate-maleic anhydride terpolymer are preferred.

[0015] Regarding the content of each comonomer in the above-mentioned terpolymer, the terpolymer is preferably composed of units derived from ethylene in an amount of 36.5 wt% to 79.95 wt%, units derived from at least one alkyl (meth)acrylate in an amount of 20.0 wt% to 61.5 wt%, and units derived from at least one unsaturated dicarboxylic anhydride in an amount of 0.05 wt% to 2.0 wt%. Desirably, when the terpolymer is composed of units derived from ethylene in an amount of 59.0 wt% to 74.9 wt%, units derived from at least one alkyl (meth)acrylate in an amount of 25.0 wt% to 40.0 wt%, and units derived from at least one unsaturated dicarboxylic anhydride in an amount of 0.1 wt% to 1.0 wt%, the dispersion diameter in polyamide becomes smaller and the impact resistance is improved. Particularly desirably, when the terpolymer is composed of units derived from ethylene in an amount of 59.4 wt% to 74.7 wt%, units derived from at least one alkyl (meth)acrylate in an amount of 25.0 wt% to 40.0 wt%, and units derived from at least one unsaturated dicarboxylic anhydride in an amount of 0.3 wt% to 0.6 wt%, the dispersion diameter in polyamide becomes an optimal size, and thus the impact resistance can be further improved. By setting the content of the comonomer within the above range, the impact resistance and flexibility can be improved.

[0016] In the resin composition of the present invention, particularly when the ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer as the component (A) is composed of 59.0 wt% to 74.9 wt% of units derived from ethylene, 25.0 wt% to 40.0 wt% of units derived from at least one alkyl (meth)acrylate, and 0.1 wt% to 1.0 wt% of units of at least one unsaturated dicarboxylic anhydride, it may not contain an anti-blocking agent described later. When the composition ratio of each monomer unit in the terpolymer is within the above range, the flexibility and impact resistance are excellent, and it is possible to obtain the desired impact resistance and flexibility without containing an anti-blocking agent. Further, even when the composition ratio of each monomer unit in the terpolymer is within the above range, an anti-blocking agent can be contained, and in that case, it is possible to significantly improve the impact resistance. Within the range that does not deteriorate the performance of the obtained resin composition, the ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer as the component (A) may contain a small amount of other monomer units that are not units derived from ethylene, not units derived from alkyl (meth)acrylate, and not units derived from unsaturated dicarboxylic anhydride. Examples of the other monomer units include units derived from glycidyl methacrylate and styrene.

[0017] In one aspect of the resin composition of the present invention, the ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer as the component (A) is composed of 59.0 wt% to 74.9 wt% of units derived from ethylene, 25.0 wt% to 40.0 wt% of units derived from at least one alkyl (meth)acrylate, and 0.1 wt% to 1.0 wt% of units of at least one unsaturated dicarboxylic anhydride, and does not contain an anti-blocking agent. In another aspect of the resin composition of the present invention, the ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer as component (A) is composed of units derived from ethylene at 59.4 wt% to 74.7 wt%, units derived from at least one alkyl (meth)acrylate at 25.0 wt% to 40.0 wt%, and units of at least one unsaturated dicarboxylic anhydride at 0.3 wt% to 0.6 wt%, and does not contain an anti-blocking agent.

[0018] The melt flow rate of the above terpolymer measured according to JIS standard K7210 (190 °C / load 2.16 kg) is preferably 1 to 50 g / 10 min, more preferably 5 to 10 g / 10 min.

[0019] The above terpolymer can be produced, for example, by a high-pressure radical polymerization method using a tubular reactor, an autoclave reactor, etc., but may also be produced by ionic polymerization. Specifically, it can be produced according to the copolymer production methods described in the examples of JP-A-60-240705, JP-A-8-113680, etc.

[0020] The resin composition of the present invention may contain one kind of the above terpolymer, or may contain two or more kinds.

[0021] (2) Component (B) Component (B) contained in the resin composition of the present invention is polyamide 6 or polyamide 66. In the present invention, from the viewpoints of molding stability during processing and heat resistance balance, polyamide 6 (hereinafter also referred to as PA6) or polyamide 66 (hereinafter also referred to as PA66) can be selected. Examples include "Amilan" manufactured by Toray Industries, Inc., "Novamid" and "Akulon" manufactured by DSM Japan Engineering Plastics Co., Ltd., "Ultramid" manufactured by BASF, and "UBE NYLON" manufactured by Ube Industries, Ltd.

[0022] The viscosity numbers of the above polyamide 6 and polyamide 66 are the values measured in accordance with ISO307, ISO1157, and ISO1628, preferably 150 to 300 cm 3 / g, more preferably 170 to 260 cm 3 / g. When the viscosity number is lower than 150 cm 3 / g, the mechanical strength is likely to decrease, and when the viscosity number is higher than 300 cm 3 / g, the moldability deteriorates, which is not preferable.

[0023] (3) Content ratio of component (A) and component (B) Regarding the content ratio of component (A) and component (B) in the resin composition of the present invention, component (A) is 5% by weight to 40% by weight, and component (B) is 95 to 60% by weight. Preferably, component (A) is 10% by weight to 20% by weight, and component (B) is 90 to 80% by weight. When the content ratio of component (A) and component (B) is within the above range, a decrease in fluidity can be suppressed, and the impact resistance can be improved.

[0024] (4) Component (C) Component (C) in the resin composition of the present invention is an anti-blocking agent. By adding an anti-blocking agent to the resin composition of the present invention, the impact resistance of the resin composition can be improved.

[0025] Examples of the type of anti-blocking agent include higher fatty acid ester compounds, amide compounds, polyethylene wax, silicone, polyethylene oxide, etc. These may be used alone or in combination of two or more. In the present invention, silicone and silicone compounds are preferable in that they can improve the dispersion state of the ethylene-alkyl (meth) acrylate-unsaturated dicarboxylic anhydride terpolymer (A). As for the method of adding the anti-blocking agent, a known method can be adopted, such as a method of premixing it with the pellets of component (A) or / and component (B), a method of adding it to water during pelletization by the underwater cutting method, or a method of adding the anti-blocking agent to the strand-cut pellets and dry blending them. From the viewpoint of uniformly applying the anti-blocking agent to the pellets, the method of adding it to water during pelletization by the underwater cutting method is preferred.

[0026] The compounding amount of the anti-blocking agent is 300 to 10,000 ppm, preferably 500 to 5,000 ppm, more preferably 500 to 2,000 ppm, based on 100 parts by mass of the total resin components. If the compounding amount of the anti-blocking agent is within the above range, the dispersion state of the ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer (A) can be optimized.

[0027] (5) Other additives The resin composition of the present invention can contain a heat stabilizer or an antioxidant or a mixture thereof selected from the group consisting of a copper compound, a sterically hindered phenol, a sterically hindered aliphatic amine, and / or an aromatic amine. These additives can be blended in appropriate amounts according to the use of the resin composition of the present invention and the like.

[0028] Further, the resin composition of the present invention can contain fibrous or particulate fillers, such as carbon fiber, glass fiber, glass beads, amorphous silica, calcium silicate, calcium metasilicate, magnesium carbonate, kaolin, chalk, powdered quartz, mica, barium sulfate, and feldspar. These fillers can be blended in appropriate amounts according to the use of the resin composition of the present invention and the like.

[0029] The resin composition of the present invention may further contain known processing aids, such as stabilizers, oxidation retardants, further reagents for suppressing decomposition by heat or ultraviolet light, lubricants, colorants (such as dyes and pigments), nucleating agents, plasticizers, flame retardants, and the like.

[0030] The resin composition of the present invention can be produced by any method of mixing the constituent components in a molten state, for example, extrusion using a single-screw or twin-screw extruder, a kneader, or compounding, or any continuous or batch method, for example, using a closed mixer.

[0031] Another embodiment of the present invention relates to a molded article obtained by molding the resin composition of the present invention. The resin composition of the present invention can be suitably molded by extrusion molding or injection molding. That is, one aspect of the present invention is a molded article obtained by extrusion molding or injection molding of the resin composition of the present invention.

[0032] Molded articles obtained from the resin composition of the present invention, such as pipes, films, tubes, sheets, fibers, etc., have excellent mechanical properties and chemical properties. Among the general molding methods used in the field of thermoplastic plastics, extrusion molding can be particularly mentioned as suitable for the production of molded articles using the resin composition of the present invention.

Examples

[0033] The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto as long as the gist thereof is not deviated. The measurement methods of various physical property values and the materials used in the examples are as follows.

[0034] 1. Preparation method and evaluation method of resin composition (1) Kneading of mixtures (A), (B) and (C) According to each example, a TEM-26SX twin-screw extruder (L / D = 40) manufactured by Toshiba Machine Co., Ltd. was used for kneading according to a conventional method. However, the kneading conditions were as follows: when polyamide 6 was used as component (B): temperature setting 250 °C (C1 / C2 / C3 / C4 / C5 / C6 / C7 / C8 / C9 / C10 / C11 / C12 / C13 / C14 / C15 / H = 50 / 50 / 50 / 100 / 150 / 200 / 230 / 230 / 250 / 250 / 250 / 250 / 250 / 250 / 250 / 250 °C), discharge rate 20 kg / h, rotation speed 400 rpm, under vent up; when polyamide 66 was used as component (B): temperature setting 280 °C (C1 / C2 / C3 / C4 / C5 / C6 / C7 / C8 / C9 / C10 / C11 / C12 / C13 / C14 / C15 / H = 50 / 50 / 50 / 100 / 160 / 220 / 260 / 260 / 280 / 280 / 280 / 280 / 280 / 280 / 280 / 280 °C), discharge rate 20 kg / h, rotation speed 400 rpm, under vent up. The kneading was carried out under these conditions. The kneaded samples were dried in a dryer (80 °C, 24 hours). (2) Preparation of test pieces Using a ROBOSHOTS-2000i100B injection molding machine manufactured by FANUC, injection molding was carried out according to a conventional method. However, the temperature conditions were as follows: when polyamide 6 was used as component (B): temperature setting 250 °C (H / B3 / B2 / B1 / N = 50 / 250 / 260 / 260 / 260 °C); when polyamide 66 was used as component (B): temperature setting 250 °C (H / B3 / B2 / B1 / N = 50 / 280 / 290 / 290 / 290 °C). For other injection conditions, a dumbbell 1A (JIS standard K7161) was injection molded at a mold temperature of 40 °C, injection speed of 40 mm / sec, injection molding pressure of 120 MPa, holding pressure of 40 MPa, and back pressure of 3 MPa. (3) Evaluation method 〇MFR Measurement was carried out using a melt indexer manufactured by Tatsuyama Kagaku Co., Ltd. according to the procedure of JIS standard K7210. However, the measurement conditions were as follows: when polyamide 6 was used as component (B): test temperature 230 °C / load 2.16 kg; when polyamide 66 was used as component (B): test temperature 270 °C / load 2.16 kg. 〇Charpy impact test The Charpy impact strength test was conducted on the notched test specimens using a digital impact tester DG-UB manufactured by Toyo Seiki Co., Ltd. at various temperatures (23°C, -40°C), with a hammer (4 J, hammer moment 2.135 N·m), and measured in accordance with JIS standard K7111-1.

[0035] Polymerization Examples 1 to 3 Specific examples of the polymerization method of the ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic acid-anhydride terpolymer constituting the present invention are shown below. In Polymerization Example 1, a 5 L autoclave (high-pressure process low-density polyethylene plant equipment) equipped with a stirrer was used, and the feedstock composition (monomer composition) at the reactor inlet was continuously injected into the reactor so that it was 96.5 wt% ethylene, 3.5 wt% methyl acrylate, and 0.066 wt% maleic anhydride. Di-(2-ethylhexylperoxy)dicarbonate was continuously injected thereto as a polymerization initiator, and polymerization was carried out while maintaining the conditions of a polymerization pressure of 160 MPa and a polymerization temperature of 195°C. The composition of the obtained copolymer is described in Table 1. In Polymerization Examples 2 and 3, polymerization was carried out under the conditions described in Table 1 for the feedstock composition, polymerization temperature, and polymerization pressure to obtain the copolymers described in Table 1. Here, the copolymer composition (wt%) of the terpolymer was calculated from the monomer composition ratios (MA / E) and (MAH / E) by IR. ·The MA / E composition ratio (mol ratio): First, a baseline was drawn at 4600 cm -1 and 3500 cm -1 and the height (A4254) of the peak at 4254 cm derived from ethylene was measured. Next, a one-point baseline was drawn at 3510 cm -1 and the peak height (A3457) at 3457 cm derived from MA was measured. Furthermore, the peak ratio (A3457 / A4254) was calculated, and the MA / E composition ratio (mol ratio) was calculated using a calibration curve of the MA content and the IR absorbance ratio separately prepared using NMR. -1 ·The MAH / E composition ratio (mol ratio): First, a baseline was drawn at 4600 cm -1 and 3500 cm and 3500 cm -1 and 3500 cm -1 and the height of the peak at 4254 cm derived from ethylene was measured.-1 The peak height (A4254) was then measured. -1 and 600cm -1 The baseline was drawn at 1783 cm derived from MAH. -1 The peak height (A1783) was measured. Furthermore, the MAH / E composition ratio (molar ratio) was calculated from the peak ratio (A1783 / A4254) using a calibration curve created from the MAH content and IR absorbance ratio determined by NMR as described in "Patent Application No. 2022-048855 (Patent Publication No. 2023-142138)".

[0036] 2.Materials used (A) Component: Ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer (E / MA / MAH terpolymer) T1:E / MA / MAH ternary copolymer (77.3 / 22.0 / 0.7wt%, MFR10.0g / 10min) T2:E / MA / MAH ternary copolymer (67.7 / 32.0 / 0.3wt%, MFR9.0g / 10min) T3:E / MA / MAH ternary copolymer (67.1 / 32.3 / 0.6wt%, MFR8.0g / 10min) (B) Component: Polyamide 6, Polyamide 66 Polyamide 6: Amilan CM1017 (product name) manufactured by Toray Industries, Inc. Polyamide 66: Amilan CM3001-N, a product name of Toray Industries, Inc. (C) Component: Anti-adhesion agent DETACK EC9052A (a mixture of higher fatty acid ester compounds and silicone compounds) manufactured by Katayama Nalco

[0037] The abbreviations used above are as follows: E: Ethylene MA: Methyl acrylate MAH: Maleic anhydride MFR: Melt flow rate (190℃, 2.16kg)

[0038] Examples and Comparative Examples [Comparative Example 1] (B) Component: Amilan CM1017, a product of Toray Industries, Inc. Formulation: (B) = 100% by weight Since it does not contain the ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer as component (A) nor the anti-blocking agent as component (C), the impact strength was low.

[0039] [Comparative Example 2] (A) Component: T1: E / MA / MAH terpolymer (77.3 / 22.0 / 0.7 wt%, MFR 10.0 g / 10 min) (B) Component: Amilan CM1017, a product of Toray Industries, Inc. Formulation: (A) / (B) = 80 / 20% by weight Since the ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer as component (A) is not composed of 59.0 wt% to 74.9 wt% of units derived from ethylene, 25.0 wt% to 40.0 wt% of units derived from at least one alkyl (meth)acrylate, and 0.1 wt% to 1.0 wt% of units of at least one unsaturated dicarboxylic anhydride, and it does not contain the anti-blocking agent as component (C), the impact strength was low.

[0040] [Example 1] (A) Component: T1: E / MA / MAH terpolymer (77.3 / 22.0 / 0.7 wt%, MFR 10.0 g / 10 min) (B) Component: Polyamide 6: Amilan CM1017, a product of Toray Industries, Inc. (C) Component: DETACK EC9052A, a product of Katayama Nalco Co., Ltd. Formulation: (A) / (B) / (C) = 80 / 20% by weight + 1000 ppm By adding the anti-blocking agent to Comparative Example 2, although slight, an improvement in impact strength was observed.

[0041] [Example 2] (A) Component: T2: E / MA / MAH terpolymer (67.7 / 32.0 / 0.3 wt%, MFR 9.0 g / 10 min) (B) Component: Polyamide 6: Amilan CM1017, a product of Toray Industries, Inc. Blend ratio: (A) / (B) = 95 / 5 wt% By using T2 with a high MA content compared to Comparative Example 2, excellent impact strength was obtained.

[0042] [Example 3] (A) Component: T2: E / MA / MAH terpolymer (67.7 / 32.0 / 0.3 wt%, MFR 9.0 g / 10 min) (B) Component: Polyamide 6: Amilan CM1017, a product of Toray Industries, Inc. Blend ratio: (A) / (B) = 80 / 20 wt% By using T2 with a high MA content compared to Comparative Example 2, excellent impact strength was obtained.

[0043] [Example 4] (A) Component: T2: E / MA / MAH terpolymer (67.7 / 32.0 / 0.3 wt%, MFR 9.0 g / 10 min) (B) Component: Polyamide 6: Amilan CM1017, a product of Toray Industries, Inc. (C) Component: DETACK EC9052A, a product of Katayama Nalco Co., Ltd. Blend ratio: (A) / (B) / (C) = 80 / 20 wt% + 1000 ppm By using T2 with a high MA content compared to Comparative Example 2 and an anti-blocking agent, significant improvements in impact strength and fluidity were observed.

[0044] [Example 5] (A) Component: T3: E / MA / MAH terpolymer (67.1 / 32.3 / 0.6 wt%, MFR 8.0 g / 10 min) (B) Component: Polyamide 6: Amilan CM1017, a product of Toray Industries, Inc. Blend ratio: (A) / (B) = 95 / 5 wt% By using T3 with a high MA content compared to Comparative Example 2, excellent impact strength was obtained.

[0045] [Example 6] (A) Component: T3: Ethylene / Methyl Acrylate / Maleic Anhydride Terpolymer (67.1 / 32.3 / 0.6 wt%, MFR 8.0 g / 10 min) (B) Component: Polyamide 6: Amilan CM1017, a product of Toray Industries, Inc. Formulation: (A) / (B) = 80 / 20 wt% By using T3 with a high content of MA compared to Comparative Example 2, excellent impact strength was obtained.

[0046] [Comparative Example 3] (B) Component: Polyamide 66: Amilan CM3001-N, a product of Toray Industries, Inc. Formulation: (B) = 100 wt% Since it contains neither the ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer as component (A) nor the anti-blocking agent as component (C), the impact strength was low.

[0047] [Comparative Example 4] (A) Component: T1: Ethylene / Methyl Acrylate / Maleic Anhydride Terpolymer (77.3 / 22.0 / 0.7 wt%, MFR 10.0 g / 10 min) (B) Component: Polyamide 66: Amilan CM3001-N, a product of Toray Industries, Inc. Formulation: (A) / (B) = 80 / 20 wt% Since the ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer as component (A) is not composed of 59.0 wt% to 74.9 wt% of units derived from ethylene, 25.0 wt% to 40.0 wt% of units derived from at least one alkyl (meth)acrylate, and 0.1 wt% to 1.0 wt% of units derived from at least one unsaturated dicarboxylic anhydride, and it also contains no anti-blocking agent as component (C), the impact strength was low.

[0048] [Example 7] (A) Component: T1: Ethylene / Methyl Acrylate / Maleic Anhydride Terpolymer (77.3 / 22.0 / 0.7 wt%, MFR 10.0 g / 10 min) (B) Component: Polyamide 66: Amilan CM3001-N, a product of Toray Industries, Inc. (C) Component: Product name DETACK EC9052A manufactured by Katayama Nalco Co., Ltd. Composition: (A) / (B) / (C) = 80 / 20 wt% + 1000 ppm By adding an anti-blocking agent to Comparative Example 4, although slight, an improvement in impact strength was observed.

[0049] [Example 8] (A) Component: T2: E / MA / MAH terpolymer (67.7 / 32.0 / 0.3 wt%, MFR 9.0 g / 10 min) (B) Component: Polyamide 66: Product name Amilan CM3001-N manufactured by Toray Industries, Inc. Composition: (A) / (B) = 95 / 5 wt% By using T2 with a high MA content compared to Comparative Example 4, excellent impact strength was obtained.

[0050] [Example 9] (A) Component: T2: E / MA / MAH terpolymer (67.7 / 32.0 / 0.3 wt%, MFR 9.0 g / 10 min) (B) Component: Polyamide 66: Product name Amilan CM3001-N manufactured by Toray Industries, Inc. Composition: (A) / (B) = 80 / 20 wt% By using T2 with a high MA content compared to Comparative Example 4, excellent impact strength was obtained.

[0051] [Example 10] (A) Component: T2: E / MA / MAH terpolymer (67.7 / 32.0 / 0.3 wt%, MFR 9.0 g / 10 min) (B) Component: Polyamide 66: Product name Amilan CM3001-N manufactured by Toray Industries, Inc. (C) Component: Product name DETACK EC9052A manufactured by Katayama Nalco Co., Ltd. Composition: (A) / (B) / (C) = 80 / 20 wt% + 1000 ppm By using T2 with a high MA content and an anti-blocking agent compared to Comparative Example 4, significant improvements in impact strength and fluidity were observed.

[0052] [Example 11] (A) Component: T3: E / MA / MAH ternary copolymer (67.1 / 32.3 / 0.6 wt%, MFR 8.0 g / 10 min) (B) Component: Polyamide 66: Product name Amilan CM3001-N manufactured by Toray Industries, Inc. Formulation: (A) / (B) / = 95 / 5 wt% By using T3 with a high content of MA compared to Comparative Example 4, excellent impact strength was obtained.

[0053] [Example 12] (A) Component: T3: E / MA / MAH ternary copolymer (67.1 / 32.3 / 0.6 wt%, MFR 8.0 g / 10 min) (B) Component: Polyamide 66: Product name Amilan CM3001-N manufactured by Toray Industries, Inc. Formulation: (A) / (B) / = 80 / 20 wt% By using T3 with a high content of MA compared to Comparative Example 4, excellent impact strength was obtained.

[0054]

Table 1

[0055]

Table 2

[0056]

Table 3

Claims

1. A resin composition based on a polyamide resin containing 5% to 40% by weight of the following component (A), 95% to 60% by weight of component (B), and component (C) (where the total of component (A) and component (B) is 100% by weight), Component (A): At least one ethylene-alkyl (meth)acrylate-unsaturated dicarboxylic anhydride terpolymer. Component (B): Polyamide 6 or polyamide 66 Component (C): An antiblocking agent, and its content is 500 to 10,000 ppm based on 100 parts by weight of all resin components. Here, when the terpolymer as component (A) is composed of units derived from 59.0 wt% to 74.9 wt% of ethylene, units derived from at least one alkyl (meth)acrylate of 25.0 wt% to 40.0 wt%, and units of at least one unsaturated dicarboxylic anhydride of 0.1 wt% to 1.0 wt%, the resin composition may not contain the antiblocking agent.

2. The resin composition according to claim 1, wherein the units derived from the alkyl (meth)acrylate constituting the terpolymer and / or the copolymer are at least one selected from the group consisting of methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, methyl methacrylate, and ethyl methacrylate.

3. The resin composition according to claim 1, wherein the unit of the unsaturated dicarboxylic anhydride constituting the terpolymer is maleic anhydride.

4. The resin composition according to claim 1, wherein the terpolymer is composed of units derived from 59.0 wt% to 74.9 wt% of ethylene, units derived from at least one alkyl (meth)acrylate of 25.0 wt% to 40.0 wt%, and units of at least one unsaturated dicarboxylic anhydride of 0.1 wt% to 1.0 wt%.

5. The resin composition according to claim 1, wherein the melt flow rate of the terpolymer measured according to JIS standard K7210 (190 °C / load 2.16 kg) is 1 to 50 g / 10 min.

6. A molding method for the resin composition according to any one of claims 1 to 5, which consists of extrusion molding or injection molding.

7. A molded article obtained by molding the resin composition according to any one of claims 1 to 5 by extrusion molding or injection molding.

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