Thermoplastic resin composition, preparation method therefor, and molded article including same

Abstract

The present invention relates to a thermoplastic resin composition, a preparation method therefor, and a molded article including same. According to the present invention, replacement of conventional transparent ABS-based resins improves chemical resistance to detergents including alcohols and the like or disinfectants including cyclopentane and the like, with the resultant effect of providing excellent transparency.

Description

Thermoplastic resin composition, method for producing the same, and molded article comprising the same

[0001] 〔Cross-citation with the applicant(s)〕

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2023-0140052, dated October 19, 2023, all of which are incorporated herein by reference.

[0003] The present invention relates to a thermoplastic resin composition, a method for producing the same, and a molded article comprising the same, and more particularly, to a thermoplastic resin composition capable of providing chemical resistance to detergents or disinfectants containing alcohols and the like while achieving excellent transparency, a method for producing the same, and a molded article comprising the same.

[0004] Vinyl cyanide compound-conjugated diene rubber-aromatic vinyl compound graft copolymer (hereinafter referred to as 'ABS resin') is widely used in automobile parts, electrical / electronic products, and office equipment due to its rigidity and chemical resistance of acrylonitrile, secondary processability of butadiene and styrene, mechanical strength, and attractive appearance.

[0005] By introducing methacrylic acid alkyl ester into this ABS resin, it is applied to products that require transparency, but in the case of this transparent ABS resin, there is a problem that whitening occurs due to detergents or disinfectants due to poor chemical resistance.

[0006] Therefore, there is a need to develop a thermoplastic resin composition that can provide transparency while improving chemical resistance to detergents or disinfectants containing alcohol, etc., as a replacement for conventional transparent ABS materials.

[0007]

[0008] [Prior Art Literature]

[0009] [Patent Document]

[0010] Chinese Patent Publication No. 114316112

[0011] The purpose of the present invention is to provide a thermoplastic resin composition having an excellent balance of chemical resistance and transparency against detergents or disinfectants containing alcohols, etc., and a method for producing the same.

[0012] In addition, the present invention aims to provide a molded product manufactured from the thermoplastic resin composition.

[0013] The above and other objects of the present invention can all be achieved by the present invention described below.

[0014] In order to achieve the above object, the present invention comprises: I) (A-1) 5 to 25 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; (A-2) 25 to 37 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 150 to 300 nm; And (B) 43 to 57 wt% of a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer; wherein the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer comprises 80 wt% or less of a methacrylic acid alkyl ester compound among a total of 100 wt% thereof, and the thermoplastic resin composition is characterized in that (A-1) and (A-2) are included in a weight ratio (A-1:A-2) of 1:0.8 to 1:3.1.

[0015] II) In the above I), the (A-1) acrylic graft copolymer may be included in an amount of 15 to 25 wt% among the total 100 wt% of (A) and (B).

[0016] III) In the above I) or II), the (A-1) acrylic graft copolymer may comprise 30 to 70 wt% of an acrylate rubber polymer having an average particle diameter of 50 to 120 nm, 30 to 50 wt% of an aromatic vinyl compound, and 10 to 30 wt% of a vinyl cyan compound, out of a total of 100 wt%.

[0017] IV) In the above I) to III), the (A-2) acrylic graft copolymer may be included in an amount of 25 to 35 wt% out of the total 100 wt% of (A) and (B).

[0018] V) In the above I) to IV), the total amount of (A-1) and (A-2) may be 43 to 57 wt%.

[0019] VI) In the above I) to V), the (A-2) acrylic graft copolymer may be formed by including 30 to 70 wt% of an acrylate rubber polymer having an average particle diameter of 50 to 120 nm, 30 to 50 wt% of an aromatic vinyl compound, and 10 to 30 wt% of a vinyl cyan compound, among a total of 100 wt%.

[0020] VII) In the above I) to VI), the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer may be formed by including 60 to 80 wt% of the methacrylic acid alkyl ester compound, 10 to 30 wt% of the aromatic vinyl compound, and 5 to 15 wt% of the vinyl cyan compound, out of a total of 100 wt%.

[0021] VIII) In the above I) to VII), the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer may have a weight average molecular weight in the range of 90,000 to 200,000 g / mol.

[0022] IX) In the above I) to VIII), the thermoplastic resin composition may be an alcohol-resistant thermoplastic resin composition.

[0023] The above thermoplastic resin composition can be used in household / appliance products, kitchenware, bathroom products, etc.

[0024] X) In the above I) to IX), the thermoplastic resin composition may have a transparency retention of 2.5 or less between the transparency measured according to ASTM D1003 after immersing a 3 mm thick sheet in a 70% isopropanol aqueous solution for 24 hours, taking it out, and leaving it for 30 minutes and the transparency measured according to ASTM D1003 before immersion.

[0025] XI) In the above I) to X), the thermoplastic resin composition may have a tensile strength of 300 kg / cm.cm or more measured under 50 mm / min conditions according to ASTM D638.

[0026]

[0027] In addition, the present invention comprises XII) (A-1) 5 to 25 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; (A-2) 25 to 37 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 150 to 300 nm; And (B) a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer comprising 43 to 57 wt%; a step of melt mixing and extruding, wherein the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer comprises 80 wt% or less of the methacrylic acid alkyl ester compound among the total 100 wt% thereof, and the (A-1) and (A-2) are included in a weight ratio (A-1:A-2) of 1:0.8 to 1:3.1.

[0028]

[0029] In addition, the present invention comprises XIII) (A-1) 5 to 25 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; (A-2) 25 to 37 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 150 to 300 nm; And (B) a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer comprising 43 to 57 wt%; a melt-mixing and extruding step, wherein the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer comprises 80 wt% or less of the methacrylic acid alkyl ester compound among 100 wt% of the total, and a method for producing a thermoplastic resin composition is provided, characterized in that the transparency is maintained at 2.5 or less between the transparency measured according to ASTM D1003 after immersing a 3 mm thick sheet in a 70% isopropanol aqueous solution for 24 hours, taking it out, and leaving it for 30 minutes and the transparency measured according to ASTM D1003 before immersion.

[0030]

[0031] In addition, the present invention provides a molded article characterized by including the thermoplastic resin composition described above XIV).

[0032] XV) In the above XIV), the molded product may be a product that comes into contact with a detergent or disinfectant containing alcohol, etc.

[0033] XVI) In the above XIV), the molded product may be a transparent container or a transparent part.

[0034]

[0035] The thermoplastic resin composition according to the present invention has the effect of providing an excellent balance of physical properties between chemical resistance and transparency against detergents or disinfectants containing alcohols, etc.

[0036] That is, a molded product manufactured from a thermoplastic resin composition according to the present invention has improved chemical resistance to detergents or disinfectants containing alcohols, etc., and excellent transparency.

[0037] Therefore, the thermoplastic resin composition according to the present invention and the molded article manufactured therefrom can be applied to fields such as transparent containers and transparent home appliance parts materials that repeatedly come into contact with detergents or disinfectants containing alcohols, etc.

[0038] To help understand the present invention, the present invention will be described in more detail below.

[0039] Terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, but should be construed as meanings and concepts that conform to the technical spirit of the present invention, taking into account that the inventor can appropriately define the concept of the term in order to explain the invention in the best way.

[0040] The present inventors confirmed that when the content of methacrylic acid alkyl ester is controlled in a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer and acrylic graft copolymers are included at an appropriate mixing ratio, a balance of physical properties between chemical resistance and transparency against detergents containing alcohols, etc., or disinfectants containing cyclopentane, etc. can be achieved, and further devoted themselves to research to complete the present invention.

[0041]

[0042] Hereinafter, the thermoplastic resin composition of the present invention will be described in detail by composition.

[0043] (A) Acrylic graft copolymer

[0044] The above (A) acrylic graft copolymer may be composed of (A-1) an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; and (A-2) an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 150 to 300 nm.

[0045] The acrylic graft copolymer comprising (A-1) an acrylate rubber polymer having an average particle size of 50 to 120 nm and the acrylic graft copolymer comprising (A-2) an acrylate rubber polymer having an average particle size of 150 to 300 nm may be included in a weight ratio of, for example, 1:0.8 to 1:3.1 (A:B), preferably 1:0.9 to 1:2.7 (A:B), and more preferably 1:1 to 1:2.4 (A:B). In this case, there is an advantage of being able to implement excellent transparency while providing chemical resistance to detergents containing alcohols, etc. or disinfectants containing cyclopentane, etc.

[0046]

[0047] (A-1) Acrylic graft copolymer

[0048] The above (A-1) acrylic graft copolymer is a small-particle acrylic graft copolymer and has the effect of improving chemical resistance such as whitening resistance to alcohol, etc.

[0049] The acrylate rubber polymer of the above (A-1) acrylic graft copolymer preferably has an average particle diameter of 50 to 120 nm, more preferably 60 to 120 nm, and even more preferably 80 to 110 nm, and within this range, it has excellent mechanical strength such as impact strength.

[0050] In this paper, the average particle size can be measured using dynamic light scattering, and specifically, it is measured as an intensity value in Gaussian mode using a particle measuring device (product name: Nicomp 380, manufacturer: PSS). As a specific measurement example, 0.1 g of latex with a total solid content of 35 to 50 wt% is prepared by diluting 1,000 to 5,000 times with distilled water, and the measurement method is measured using a flow cell through auto-dilution. The measurement mode is dynamic light scattering / Intensity 300 KHz / Intensity-weight Gaussian Analysis, and the setting values ​​are temperature 23°C, measurement wavelength 632.8 nm, and channel width 10 μsec.

[0051]

[0052] The above (A-1) acrylic graft copolymer comprises, for example, 30 to 70 wt% of an acrylate rubber polymer, 30 to 50 wt% of an aromatic vinyl compound, and 10 to 30 wt% of a vinyl cyan compound, based on 100 wt% of the total, and preferably comprises 32 to 65 wt% or 32 to 60 wt% of an acrylate rubber polymer, 30 to 50 wt% or 40 to 45 wt% of an aromatic vinyl compound, and 12 to 30 wt% or 20 to 26 wt% of a vinyl cyan compound, and within this range, has excellent chemical resistance such as whitening resistance to alcohols and the like.

[0053] In this description, a polymer comprising a compound means a polymer polymerized including the compound, and the units in the polymerized polymer are derived from the compound.

[0054]

[0055] The above acrylate rubber polymer may be formed by including an alkyl acrylate compound.

[0056] In the present invention, the alkyl acrylate compound may be, for example, an alkyl acrylate having an alkyl group having 1 to 15 carbon atoms, preferably at least one selected from the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylbutyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, hexyl acrylate, heptyl acrylate, n-pentyl acrylate, and lauryl acrylate, more preferably an alkyl acrylate including a chain alkyl group having 1 to 4 carbon atoms, and even more preferably butyl acrylate.

[0057]

[0058] In the present invention, the aromatic vinyl compound may be, for example, at least one selected from the group consisting of styrene, α-methyl styrene, ο-methyl styrene, ρ-methyl styrene, m-methyl styrene, ethyl styrene, isobutyl styrene, t-butyl styrene, ο-bromo styrene, ρ-bromo styrene, m-bromo styrene, ο-chloro styrene, ρ-chloro styrene, m-chloro styrene, vinyltoluene, vinylxylene, fluorostyrene, and vinylnaphthalene, preferably at least one selected from the group consisting of styrene and α-methyl styrene, more preferably styrene, and in this case, there is an effect of having appropriate fluidity, excellent processability, and excellent mechanical properties such as impact resistance.

[0059]

[0060] In the present invention, the vinyl cyanide compound may be, for example, at least one selected from the group consisting of acrylonitrile, methacrylonitrile, ethylacrylonitrile, and isopropylacrylonitrile, and is preferably acrylonitrile.

[0061]

[0062] The above (A-1) acrylic graft copolymer can be produced, for example, by emulsion polymerization, and in this case, it has excellent mechanical strength such as impact strength.

[0063] The above emulsion polymerization is not particularly limited to an emulsion polymerization method commonly practiced in the technical field to which the present invention belongs, and may be performed using an emulsion graft polymerization method, for example.

[0064]

[0065] The above (A-1) acrylic graft copolymer may have a weight average molecular weight of, for example, 50,000 to 200,000 g / mol, preferably 60,000 to 200,000 g / mol, more preferably 60,000 to 150,000 g / mol, and even more preferably 60,000 to 80,000 g / mol.

[0066] In this paper, the weight average molecular weight can be measured as a relative value to a standard polystyrene (PS) sample through GPC (Gel Permeation Chromatography, water breeze) using THF (tetrahydrofuran) as an eluent, and in detail, it is a value obtained by applying the polystyrene-converted weight average molecular weight (Mw) obtained by gel permeation chromatography (GPC: gel permeation chromatography, PL GPC220, Agilent Technologies).

[0067] Specifically, the polymer to be measured is dissolved in tetrahydrofuran to a concentration of 1%, 10 μL is injected into GPC at a flow rate of 0.3 mL / min, and analysis can be performed at 30°C for a sample concentration of 2.0 mg / mL (100 μL injection). Here, two PLmixed B columns from Waters are connected in series, and an RI detector (Agilent Waters product, 2414) is used as the detector, and the data is measured at 40°C and then processed using ChemStation.

[0068] In this description, % means weight % unless otherwise defined.

[0069]

[0070] The grafting ratio of the above (A-1) acrylic graft copolymer may be, for example, 25 to 70%, preferably 40 to 70%, or 25 to 55%.

[0071] The grafting rate of this invention can be obtained by adding acetone to 1 g of dried powder of the graft polymer, stirring at room temperature for 24 hours, centrifuging the mixture to collect only the insoluble matter that has not dissolved in acetone, and measuring the weight after drying, and calculating using the following mathematical formula 1.

[0072] [Mathematical Formula 1]

[0073] Grafting ratio (%) = [Weight of grafted compound (g) / Weight of rubber (g)] * 100

[0074] - Weight of grafted compound (g): The graft copolymer was put into acetone and vibrated for 24 hours with a vibrator (trade name: SI-600R, manufacturer: Lab.companion) to dissolve the free graft copolymer, centrifuge at 14,000 rpm for 1 hour, and dried for 2 hours at 140°C with a vacuum dryer (trade name: DRV320DB, manufacturer: ADVANTEC) to obtain the weight of the insoluble substance (gel) minus the weight of the rubber (g).

[0075] - Rubber weight (g): Weight part of the theoretically added rubber (core) in the graft copolymer powder

[0076]

[0077] The above (A-1) acrylic graft copolymer may be, for example, 5 to 25 wt%, preferably 10 to 25 wt%, and more preferably 15 to 25 wt%, of the total 100 wt% of (A-1), (A-2), and (B), and within this range, it has the advantage of providing chemical resistance to detergents containing alcohols, etc., or disinfectants containing cyclopentane, etc., while realizing excellent transparency.

[0078] The above (A-1) acrylic graft copolymer may be a commercially available material as long as it complies with the definition of the present invention.

[0079]

[0080] (A-2) Acrylic graft copolymer

[0081] The above (A-2) acrylic graft copolymer is a large particle size acrylic graft copolymer and has the effect of improving mechanical strength such as impact strength.

[0082] The acrylate rubber polymer of the above (A-2) acrylic graft copolymer preferably has an average particle diameter of 150 to 300 nm, more preferably 180 to 300 nm, and even more preferably 200 to 300 nm, and within this range, it has excellent mechanical strength such as impact strength.

[0083] In this paper, the average particle size can be measured using dynamic light scattering, and specifically, it is measured as an intensity value in Gaussian mode using a particle measuring device (product name: Nicomp 380, manufacturer: PSS). As a specific measurement example, 0.1 g of latex with a total solid content of 35 to 50 wt% is prepared by diluting 1,000 to 5,000 times with distilled water, and the measurement method is measured using a flow cell through auto-dilution. The measurement mode is dynamic light scattering / Intensity 300 KHz / Intensity-weight Gaussian Analysis, and the setting values ​​are temperature 23°C, measurement wavelength 632.8 nm, and channel width 10 μsec.

[0084]

[0085] The above (A-2) acrylic graft copolymer comprises, for example, 30 to 70 wt% of an acrylate rubber polymer, 30 to 50 wt% of an aromatic vinyl compound, and 10 to 30 wt% of a vinyl cyan compound, based on a total of 100 wt%, and preferably comprises 32 to 65 wt% or 32 to 60 wt% of an acrylate rubber polymer, 35 to 50 wt% or 40 to 45 wt% of an aromatic vinyl compound, and 12 to 30 wt% or 20 to 26 wt% of a vinyl cyan compound, and within this range, excellent mechanical strength such as impact strength is achieved.

[0086]

[0087] The above acrylate rubber polymer may be formed by including an alkyl acrylate compound.

[0088] The types of the above alkyl acrylate compound, aromatic vinyl compound and vinyl cyan compound are as described in the description of the above (A-1) acrylic graft copolymer.

[0089] The above (A-2) acrylic graft copolymer can be produced, for example, by emulsion polymerization, and in this case, it has excellent mechanical strength such as impact strength and chemical resistance such as whitening resistance to alcohol, etc.

[0090] The above emulsion polymerization is not particularly limited to an emulsion polymerization method commonly practiced in the technical field to which the present invention belongs, and may be performed using an emulsion graft polymerization method, for example.

[0091]

[0092] The above (A-2) acrylic graft copolymer may have a weight average molecular weight of, for example, 90,000 to 200,000 g / mol, preferably 100,000 to 200,000 g / mol, more preferably 100,000 to 150,000 g / mol, and even more preferably 110,000 to 140,000 g / mol. In this case, excellent mechanical strength such as impact strength is achieved.

[0093]

[0094] The grafting ratio of the above (A-2) acrylic graft copolymer may be, for example, 25 to 70%, preferably 40 to 70%, or 25 to 55%.

[0095] The grafting rate of this invention can be obtained by adding acetone to 1 g of dried powder of the graft polymer, stirring at room temperature for 24 hours, centrifuging the mixture to collect only the insoluble matter that has not dissolved in acetone, and measuring the weight after drying, and calculating using the following mathematical formula 1.

[0096] [Mathematical Formula 1]

[0097] Grafting ratio (%) = [Weight of grafted compound (g) / Weight of rubber (g)] * 100

[0098] - Weight of grafted compound (g): The graft copolymer was put into acetone and vibrated for 24 hours with a vibrator (trade name: SI-600R, manufacturer: Lab.companion) to dissolve the free graft copolymer, centrifuge at 14,000 rpm for 1 hour, and dried for 2 hours at 140°C with a vacuum dryer (trade name: DRV320DB, manufacturer: ADVANTEC) to obtain the weight of the insoluble substance (gel) minus the weight of the rubber (g).

[0099] - Rubber weight (g): Weight part of the theoretically added rubber (core) in the graft copolymer powder

[0100]

[0101] The above (A-2) acrylic graft copolymer may be, for example, 25 to 37 wt%, preferably 25 to 38 wt%, and more preferably 25 to 35 wt%, of the total 100 wt% of (A-1), (A-2), and (B) constituting the thermoplastic resin composition, and within this range, it has the advantage of providing the thermoplastic resin composition with chemical resistance to detergents containing alcohols, etc., or disinfectants containing cyclopentane, etc., while realizing excellent transparency.

[0102] The above (A-2) acrylic graft copolymer may be a commercially available material as long as it complies with the definition of the present invention.

[0103]

[0104] (B) Methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer

[0105] The above (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer can provide a balance of physical properties between chemical resistance and transparency against detergents containing alcohols such as isopropanol or disinfectants containing cyclopentane.

[0106] The above (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer is formed by including, for example, 80 wt% or less of the methacrylic acid alkyl ester compound based on 100 wt% of the total, and as a specific example, including 60 to 80 wt% of the methacrylic acid alkyl ester compound, 10 to 30 wt% of the aromatic vinyl compound, and 5 to 15 wt% of the vinyl cyan compound, and preferably including 65 to 80 wt% or 68 to 80 wt% of the methacrylic acid alkyl ester compound, 15 to 30 wt% or 15 to 25 wt% of the aromatic vinyl compound, and 5 to 15 wt% or 5 to 10 wt% of the vinyl cyan compound, and within this range, excellent mechanical properties such as tensile strength are achieved.

[0107]

[0108] The above methacrylic acid alkyl ester compound may be selected from methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, pentyl methacrylate, hexyl methacrylate, heptyl methacrylate, octyl methacrylate, 2-ethylhexyl methacrylate, nonyl methacrylate, isononyl methacrylate and decyl methacrylate, among which methyl methacrylate is preferred.

[0109] The types of the above aromatic vinyl compound and the above vinyl cyan compound are as described in the description of the above (A-1) acrylic graft copolymer.

[0110] The above (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer can be produced, for example, by bulk polymerization, and in this case, it has excellent mechanical strength such as impact strength.

[0111] The above bulk polymerization is not particularly limited when it is performed using a bulk polymerization method commonly performed in the technical field to which the present invention belongs.

[0112]

[0113] The above (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer may have a weight average molecular weight of, for example, 50,000 to 200,000 g / mol, preferably 60,000 to 200,000 g / mol, more preferably 60,000 to 150,000 g / mol, and even more preferably 100,000 to 150,000 g / mol.

[0114]

[0115] The above (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer may be, for example, 43 to 57 wt%, preferably 43 to 55 wt%, and more preferably 45 to 55 wt%, of the total 100 wt% of (A-1), (A-2) and (B), and within this range, it has the advantage of providing chemical resistance to detergents containing alcohols or disinfectants containing cyclopentane or the like in the thermoplastic resin composition while realizing excellent transparency.

[0116] The above (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer may use a commercially available material as long as it complies with the definition of the present invention.

[0117]

[0118] thermoplastic resin composition

[0119] The above thermoplastic resin composition may further contain necessary additives.

[0120] The above additive may be, for example, at least one selected from the group consisting of an activator, a heat stabilizer, a UV stabilizer, an optical whitening agent, a pigment, a dye, a processing aid, a metal deactivator, an antifriction agent, and an antiwear agent.

[0121] The above additive may be included, for example, in an amount of 0.01 to 5 parts by weight, preferably 0.05 to 3 parts by weight, and more preferably 0.1 to 3 parts by weight, based on a total of 100 parts by weight of (A-1), (A-2), and (B) constituting the thermoplastic resin composition. In this case, the thermoplastic resin composition of the present invention has the effect of well realizing the required properties without lowering the original properties thereof.

[0122] The above-mentioned lubricant may be, for example, at least one selected from the group consisting of an alkyl acrylate-based lubricant, a styrene-acrylonitrile copolymer having a weight average molecular weight of 30,000 to 70,000 g / mol, an ethylene copolymer, an olefin-based wax, and an aliphatic amide-based compound, and preferably at least one selected from the group consisting of an alkyl acrylate-based lubricant, a styrene-acrylonitrile copolymer having a weight average molecular weight of 30,000 to 70,000 g / mol, and an olefin-based wax, and more preferably an alkyl acrylate-based lubricant, and in this case, the material has excellent physical property balance and excellent scratch resistance, thereby providing an excellent appearance quality.

[0123] As another example, the above-mentioned active agent may be present in an amount of 0.1 to 3 parts by weight, preferably 0.5 to 2.5 parts by weight, and more preferably 0.7 to 2.2 parts by weight, based on a total of 100 parts by weight of (A-1), (A-2), and (B) constituting the thermoplastic resin composition, and within this range, both impact resistance and fluidity are excellent.

[0124] The above alkyl acrylate-based lubricant may preferably be at least one selected from the group consisting of poly(methyl acrylate), poly(ethyl acrylate), and poly(butyl acrylate), and in this case, the formation of mold deposits is suppressed, so that the molded product has an attractive appearance and high gloss.

[0125] The above alkyl acrylate-based lubricant is not particularly limited as long as it follows the definition of the present invention, and a directly manufactured or commercially available product can be used.

[0126] The above styrene-acrylonitrile copolymer may preferably have a weight average molecular weight of 40,000 to 67,000 g / mol, more preferably 50,000 to 65,000 g / mol, and even more preferably 55,000 to 65,000 g / mol, and within this range, it has the effect of improving fluidity, thereby providing excellent processability and improving appearance quality.

[0127] The above styrene-acrylonitrile copolymer may have, for example, a flow index (190°C, 5kg) measured according to ISO 1133 of 20 to 60 g / 10min, preferably 25 to 55 g / 10min, and within this range, has excellent impact strength and flowability and excellent appearance quality.

[0128] The above styrene-acrylonitrile copolymer may have a heat distortion temperature of, for example, 82 to 90°C, preferably 84 to 88°C, as measured according to ASTM D648, and within this range has excellent impact strength and fluidity and excellent appearance quality.

[0129] The above ethylene copolymer may be at least one selected from the group consisting of, for example, an ethylene / 1-butene copolymer and an ethylene / n-butyl acrylate / carbon monooxide terpolymer, and in this case, it has the effect of excellent heat resistance and fluidity and superior appearance quality.

[0130] The above olefin wax may be, for example, at least one selected from the group consisting of polyethylene wax and polypropylene wax, and preferably polyethylene wax. In this case, it has the effect of excellent heat resistance and fluidity and superior appearance quality.

[0131] The above aliphatic amide compound may be at least one selected from the group consisting of stearamide, behanamide, ethylene bis(stearamide), ethylene bis 12-hydroxy stearamide, erucamide, oleamide, and ethylene bis oleamide, and preferably ethylene bis stearamide. In this case, the aliphatic amide compound has excellent impact strength and fluidity and excellent appearance quality.

[0132] As another example, the heat stabilizer may be present in an amount of 0.1 to 2 parts by weight, more preferably 0.2 to 1.5 parts by weight, based on 100 parts by weight of the total of (A-1), (A-2) and (B) constituting the thermoplastic resin composition, and within this range, the heat resistance is improved.

[0133] The above heat stabilizer may be, for example, at least one selected from the group consisting of a phenol-based heat stabilizer, a phosphite-based heat stabilizer, and a thioether-based heat stabilizer, and is preferably a phenol-based heat stabilizer and a phosphite-based heat stabilizer.

[0134] The above phenolic heat stabilizer may be, for example, at least one selected from the group consisting of tetrakis methylene 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate methane, 1,3,5-tris-(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione, and 1,3,5-tris-(3,5-di-t-butyl-4-hydroxybenzyl)-s-triazine-2,4,6-(1H,3H,5H)-trione.

[0135] The above phosphite-based heat stabilizer may be, for example, trisnonylphenyl phosphite, tris-(2,4-di-tert-butylphenyl)phosphite, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, or a mixture thereof.

[0136] The above thioether-based heat stabilizer may be, for example, at least one selected from the group consisting of dilauryl thiodipropionate, dimyristyl thiodipropionate, lauryl stearyl thiodipropionate, distearyl thiodipropionate, dimethyl thiodipropionate, 2-mercaptobenzimidazole, phenothiazine, octadecyl thioglycolate, butyl thioglycolate, octyl thioglycolate, and thiocresol.

[0137] As another example, the UV stabilizer may be present in an amount of 0.1 to 3 parts by weight, more preferably 0.5 to 1.5 parts by weight, based on 100 parts by weight of the total of (A-1), (A-2) and (B) constituting the thermoplastic resin composition, and in this case, there is an effect of improving weather resistance.

[0138] The UV stabilizer may be, for example, a hindered amine light stabilizer (HALS), and preferably, 1,1-bis(2,2,6,6-tetramethyl-4-piperidyl)succinate, bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate, bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl)-N-butyl-3,5-di-tert-butyl-4-hydroxybenzylmalonate, 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid. Condensation products, linear or cyclic condensation products of N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylene diamine and 4-tert-octylamino-2,6-di-chloro-1,3,5-triazine, tris(2,2,6,6-tetramethyl-4-piperidyl)nitrilotriacetate, tetrakis(2,2,6,6-tetramethyl-4-piperidyl)-1,2,3,4-butane tetracarboxylate, 1,1'-(1,2-ethanediyl)-bis(3,3,5,5-tetramethylpiperazinone), 4-benzoyl-2,2,6,6-tetramethylpiperidine, 4-stearyloxy-2,2,6,6-tetramethylpiperidine, At least one selected from the group consisting of a linear or cyclic condensation product of N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylene diamine and 4-morpholino-2,6-dichloro-1,3,5-triazine, a reaction product of 7,7,9,9-tetramethyl-2-cycloundecyl-1-oxa-3,8-diaza-4-oxospiro-[4,5]decane and epichlorohydrin, and poly[[6-(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidinyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidinyl)imino], and more preferably Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate2-(2H-benzotriazol-2-yl)-4-(-(1,1,3,3-tetramethylbutyl)phenol), poly[[6-(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidinyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidyl)imino] or a mixture thereof, and more preferably Bis(2,2,6,6-tetramethyl-4-piperidyl)sebacade, poly[[6-(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidinyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidinyl)imino], or a mixture of two or more thereof, in which case there is an advantage of excellent impact resistance and fluidity and greatly improving weather resistance.

[0139] The above pigment may be, for example, carbon black.

[0140] As another example, the above pigment may be present in an amount of 0.5 to 5 parts by weight, preferably 1 to 4.5 parts by weight, and more preferably 2 to 4.5 parts by weight, based on a total of 100 parts by weight of (A-1), (A-2), and (B) constituting the thermoplastic resin composition, and within this range, it has the advantage of excellent physical property balance and excellent coloring properties.

[0141]

[0142] The thermoplastic resin composition may, for example, comprise (A-1) 5 to 25 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; (A-2) 25 to 37 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 150 to 300 nm; And (B) 43 to 57 wt% of a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer; wherein the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer comprises 80 wt% or less of the methacrylic acid alkyl ester compound among the total 100 wt% thereof, and (A-1) and (A-2) are included in a weight ratio (A-1:A-2) of 1:0.8 to 1:3.1, and in this case, there is an advantage of being able to implement excellent transparency while providing chemical resistance to detergents containing alcohols or the like or disinfectants containing cyclopentane or the like in the thermoplastic resin composition.

[0143] The thermoplastic resin composition described above can be confirmed to not even produce fine cracks after fixing the specimen using, for example, an ESCR 2% jig, covering it with gauze, applying a 70% isopropanol aqueous solution thereon, leaving it for 1 hour, and then removing the gauze.

[0144] Here, the specimen may be an injection molded specimen for measuring tensile strength, etc.

[0145]

[0146] The thermoplastic resin composition may have a transparency retention of 2.5 or less, preferably 1.2 to 2.4, between the transparency measured according to ASTM D1003 after immersing a 3 mm thick sheet in a 70% isopropanol aqueous solution for 24 hours, taking it out, and leaving it for 30 minutes, and the transparency measured according to ASTM D1003 before immersion. Within this range, excellent transparency is achieved without affecting mechanical strength.

[0147] The thermoplastic resin composition may have, for example, a tensile strength of 300 kg / cm.cm or more, or 300 to 400 kg / cm.cm, measured under 50 mm / min conditions according to ASTM D638. Within this range, the composition has excellent mechanical strength and transparency, and excellent chemical resistance to detergents containing alcohols, etc., or disinfectants containing cyclopentane, etc.

[0148] The thermoplastic resin composition may have an impact strength of 10 kg / cm.cm or more, preferably 10 to 20 kg / cm.cm, as measured under notched Izod conditions on a 1 / 4 inch specimen using, for example, D256. Within this range, the composition has excellent mechanical strength and transparency, and excellent chemical resistance to detergents containing alcohols or disinfectants containing cyclopentane or the like.

[0149]

[0150] The thermoplastic resin composition is preferably, for example, (A-1) 5 to 25 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; (A-2) 25 to 37 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 150 to 300 nm; And (B) 43 to 57 wt% of a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer; wherein the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer comprises 80 wt% or less of the methacrylic acid alkyl ester compound among 100 wt% of the total, and is characterized in that the transparency measured according to ASTM D1003 after immersing a 3 mm thick sheet in a 70% isopropanol aqueous solution for 24 hours and leaving it for 30 minutes and the transparency measured according to ASTM D1003 before immersion have a transparency maintenance of 2.5 or less, and in this case, there is an advantage of being able to implement excellent transparency while providing chemical resistance to detergents containing alcohols or disinfectants containing cyclopentane or the like in the thermoplastic resin composition.

[0151]

[0152] Method for producing a thermoplastic resin composition

[0153] A method for producing a thermoplastic resin composition of the present invention comprises, for example, a step of melt-mixing and extruding (A-1) 5 to 25 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; (A-2) 25 to 37 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 150 to 300 nm; and (B) 43 to 57 wt% of a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer, wherein the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer comprises 80 wt% or less of the methacrylic acid alkyl ester compound among a total of 100 wt%. In such cases, there is an advantage in that the conventional transparent ABS material can be replaced to improve chemical resistance to detergents containing alcohol, etc., or disinfectants containing cyclopentane, etc., and to achieve excellent transparency.

[0154] The above (A-1) and (A-2) may preferably be included in a weight ratio (A-1:A-2) of 1:0.8 to 1:3.1.

[0155] The above extruding step is not limited to a process for manufacturing an extruded product using an extruder, and for example, it may be performed under temperature conditions of 200 to 300°C, preferably 220 to 260°C, within which stable extrusion is possible and the mixing effect is excellent. At this time, the temperature corresponds to the temperature set in the cylinder.

[0156] The above extruder is not particularly limited as long as it is an extruder commonly used in the technical field to which the present invention belongs, and may preferably be a twin-screw extruder.

[0157] A step of injection molding an extruded product manufactured using the above method for manufacturing a thermoplastic resin composition may be included. In this case, a molded product having both chemical resistance and impact strength can be easily manufactured.

[0158] The above injection can be performed under injection temperature conditions of, for example, 220 to 280°C, preferably 230 to 270°C, and has the advantage of allowing easy manufacturing of injection molded products requiring complex designs within this range. In this case, the injection temperature corresponds to the temperature set in the cylinder.

[0159] In addition, the injection can be performed under injection pressure conditions of, for example, 70 to 90 bar, preferably 75 to 85 bar, and there is an advantage in that an injection molded product requiring a complex design can be easily manufactured within this range.

[0160] In addition, the injection molding has the advantage of being able to easily manufacture injection molded products requiring complex designs within a pressure range of, for example, 35 to 60 bar, preferably 40 to 55 bar.

[0161]

[0162] A method for producing a thermoplastic resin composition of the present invention is, as a preferred example, comprising: (A-1) 5 to 25 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; (A-2) 25 to 37 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 150 to 300 nm; And (B) a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer of 43 to 57 wt%; comprising a step of melt mixing and extruding, wherein the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer comprises 80 wt% or less of the methacrylic acid alkyl ester compound among the total 100 wt% thereof, and the (A-1) and (A-2) may be included in a weight ratio (A-1:A-2) of 1:0.8 to 1:3.1. In this case, there is an advantage that chemical resistance to detergents containing alcohols, etc. or disinfectants containing cyclopentane, etc. can be improved and excellent transparency can be implemented by replacing conventional transparent ABS materials.

[0163] The method for manufacturing the above thermoplastic resin composition shares all the technical characteristics of the aforementioned thermoplastic resin composition. Therefore, a description of the overlapping portions will be omitted.

[0164]

[0165] molded products

[0166] The molded article of the present invention is characterized by including, for example, the thermoplastic resin composition of the present invention, and in this case, compared to conventional thermoplastic resin compositions, it has the advantage of being able to realize excellent transparency while providing chemical resistance to detergents containing alcohols, etc., or disinfectants containing cyclopentane, etc.

[0167] The above-mentioned molded product may be a product that is intended for repeated contact with detergents containing alcohol or disinfectants containing cyclopentane, i.e., an alcohol-resistant product.

[0168] The above molded product may also be a transparent container or a transparent component for home appliances.

[0169]

[0170] In describing the thermoplastic resin composition, the manufacturing method thereof, and the molded product of the present invention, it is stated that other conditions or equipment, etc. that are not explicitly described can be appropriately selected within the range commonly practiced in the art and are not particularly limited.

[0171]

[0172] Hereinafter, preferred examples are presented to help understand the present disclosure; however, the following examples are merely illustrative of the present disclosure, and it is obvious to those skilled in the art that various changes and modifications are possible within the scope and technical idea of ​​the present disclosure, and it is also natural that such changes and modifications fall within the scope of the appended patent claims.

[0173]

[0174] [Example]

[0175] The materials used in the following examples and comparative examples are as follows.

[0176] * (A) Acrylic graft copolymer

[0177] (A-1) ASA graft copolymer having an average particle size of 100 nm of acrylate rubber polymer (40 wt% of butyl acrylate, 46.5 wt% of styrene, and 13.5 wt% of acrylonitrile, weight average molecular weight 70,000 g / mol, melt index (MI) 2 g / 10 min)

[0178] (A-2) ASA graft copolymer having an average particle size of 250 nm of acrylate rubber polymer (40 wt% of butyl acrylate, 46.5 wt% of styrene, and 13.5 wt% of acrylonitrile, weight average molecular weight 110,000 g / mol, melt index (MI) 1 g / 10 min)

[0179] * (B) Methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer (65 wt% methyl methacrylate, 25 wt% styrene and 10 wt% acrylonitrile, weight average molecular weight 120,000 g / mol)

[0180] * (C) ABS graft copolymer having an average particle size of 100 nm of diene rubber (50 wt% butadiene, 35 wt% methyl methacrylate, 12.5 wt% styrene, and 2.5 wt% acrylonitrile, weight average molecular weight 80,000 g / mol)

[0181] * (D) ABS graft copolymer having an average particle size of 250 nm of diene rubber (50 wt% butadiene, 35 wt% methyl methacrylate, 12.5 wt% styrene, and 2.5 wt% acrylonitrile, weight average molecular weight 100,000 g / mol)

[0182] * Additive 1: Antioxidant IR 1010

[0183] * Additive 2: Antioxidant PEP-8

[0184] * Additive 3: Stearic acid as an active ingredient

[0185]

[0186] Examples 1 to 3 and Comparative Examples 1 to 8

[0187] The ingredients and contents listed in Table 1 below were fed into a twin-screw extruder. In addition, 0.15 parts by weight of additives 1, 2, and 3 were each fed based on a total of 100 parts by weight of (A-1), (A-2), (B), and (C). Then, pellets were manufactured using a twin-screw extruder at a cylinder temperature of 240°C. Furthermore, specimens were manufactured to measure impact strength and tensile strength by injection molding the manufactured pellets at a barrel temperature of 230°C in an injection molding machine.

[0188] Meanwhile, pellets manufactured as a physical property measurement specimen used for measuring the transparency retention and chemical resistance below were extruded using an extruder under conditions of 220 to 260°C to manufacture an extruded sheet having a width of 13 mm, a length of 80 mm, and a thickness of 3 mm.

[0189]

[0190] [Example Exam]

[0191] The characteristics of the specimens manufactured in Examples 1 to 3 and Comparative Examples 1 to 8 were measured by the following methods, and the results are shown in Table 1 below.

[0192]

[0193] measurement method

[0194] * Transparency maintenance (△Hz): The transparency was calculated as the difference between the transparency measured according to ASTM D1003 after immersing a 3 mm thick sheet in a 70% isopropanol aqueous solution for 24 hours, taking it out, and leaving it for 30 minutes, and the transparency measured according to ASTM D1003 before immersion.

[0195] * Impact strength (kg / cm.cm): Notched Izod impact strength was measured on 1 / 4 inch specimens according to ASTM D256.

[0196] * Chemical Resistance: Using an ESCR (Environmental Stress Cracking Resistance) 1.0% jig, cyclopentane was applied to the extruded pellets for 5 minutes, and then cracking was observed. If no cracks occurred, it was evaluated as "No Cracks," if fine cracks occurred on the sides, it was evaluated as "Micro Cracks," and if multiple horizontal cracks occurred, it was evaluated as "Cracked."

[0197] * Tensile strength (kg / cm.cm): Measured at 50 mm / min according to ASTM D638.

[0198] Classification Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 (A-1) Acrylic graft copolymer 15 20 25 10 30-50 10 25-20 (A-2) Acrylic graft copolymer 35 30 25 40 20 50-30 35 30- (B) Methacrylic acid alkyl ester compound - aromatic vinyl compound - vinyl cyanide compound copolymer 50 50 50 50 50 50 50 60 40 50 50 (C) Diene graft copolymer --------- 20 - (D) Diene graft copolymer --------- 30 Transparency Retention (△Hz) 2.4 2.3 1.8 3.6 1.7 6.9 1.11 31.5 27.8 17.4 Impact strength (kg / cm.cm) 14 12 11 16 8 17 5 11 15 12 18 Chemical resistance No cracks No cracks No cracks No cracks No cracks No cracks No cracks Micro cracks No cracks Cracked Cracked Tensile strength (kg / cm.cm) 3 3 0 3 4 0 3 4 0 3 0 3 7 0 3 1 0 4 2 0 3 8 0 2 7 0 3 4 0 3 4 0

[0199] As shown in Table 1 above, it was confirmed that Examples 1 to 3 according to the present invention had mechanical strengths equal to or greater than those of Examples 1 to 8, but had significantly superior transparency retention and chemical resistance.

[0200] Therefore, when the thermoplastic resin composition according to the present invention is applied to a transparent container or a transparent component for home appliances, it is expected to significantly improve product reliability by securing a balance of physical properties between transparency maintenance and chemical resistance while maintaining mechanical strength.

[0201] On the other hand, in the case of Comparative Example 1, which used an excessive amount of (A-2) acrylic graft copolymer, the transparency was confirmed to be poor compared to Example 1.

[0202] In addition, in the case of Comparative Example 2, where (A-1) acrylic graft copolymer was used in an excessive amount and (A-2) acrylic graft copolymer was used in a small amount, the impact strength was confirmed to be inferior to that of Example 1.

[0203] In addition, in the case of Comparative Example 3, which did not include (A-1) acrylic graft copolymer and used (A-2) acrylic graft copolymer in an excess amount equivalent to the corresponding content, it was confirmed that the transparency was significantly reduced compared to Example 1.

[0204] In addition, in the case of Comparative Example 4, which did not include the (A-2) acrylic graft copolymer and used the (A-1) acrylic graft copolymer in an excess amount, it was confirmed that the impact strength was significantly reduced compared to Example 1.

[0205] In addition, in the case of Comparative Example 5, which used an excessive amount of (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer, microcracks were observed compared to Example 1, confirming poor chemical resistance.

[0206] In addition, in the case of Comparative Example 6, which used a small amount of (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer, it was confirmed that the tensile strength was significantly poorer than that of Example 1.

[0207] In addition, in the case of Comparative Example 7, which did not include (A-1) acrylic graft copolymer and added (C) diene graft copolymer in the same amount, it was confirmed that the transparency and chemical resistance were significantly poorer than in Example 1, and the impact strength was also reduced.

[0208] In addition, in the case of Comparative Example 8, which did not include (A-1) acrylic graft copolymer and added (D) diene graft copolymer in the same amount, it was confirmed that the transparency and chemical resistance were significantly poorer than in Example 1.

[0209]

[0210] In summary of these results, the thermoplastic resin composition of the present invention is a copolymer of methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound, in which the amount of methacrylic acid alkyl ester compound used is controlled within a predetermined range, and an acrylic graft copolymer having different average rubber particle diameters is blended within a predetermined range, thereby providing transparency equivalent to or higher than that of a conventional transparent ABS resin through a synergistic effect according to the combination thereof, while significantly improving transparency retention and chemical resistance, and thus being suitable for transparent containers that are repeatedly exposed to detergents or disinfectants, or transparent home appliance parts.

Claims

1. (A-1) 5 to 25 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; (A-2) 25 to 37 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle size of 150 to 300 nm; and (B) 43 to 57 wt% of a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer; The above (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer comprises 80 wt% or less of the methacrylic acid alkyl ester compound among the total 100 wt% thereof, A thermoplastic resin composition characterized in that the above (A-1) and (A-2) are included in a weight ratio (A-1:A-2) of 1:0.8 to 1:3.

1.

2. In paragraph 1, A thermoplastic resin composition characterized in that the above (A-1) acrylic graft copolymer is included in an amount of 15 to 25 wt% among the total 100 wt% of (A) and (B).

3. In paragraph 1, A thermoplastic resin composition characterized in that the above (A-1) acrylic graft copolymer comprises 30 to 70 wt% of an acrylate rubber polymer having an average particle diameter of 50 to 120 nm, 30 to 50 wt% of an aromatic vinyl compound, and 10 to 30 wt% of a vinyl cyanide compound, out of a total of 100 wt% of all components constituting the above (A-1) acrylic graft copolymer.

4. In paragraph 1, A thermoplastic resin composition characterized in that the above (A-2) acrylic graft copolymer is included in an amount of 25 to 35 wt% among the total 100 wt% of (A) and (B).

5. In paragraph 1, A thermoplastic resin composition characterized in that the above (A-2) acrylic graft copolymer comprises, among a total of 100 wt%, 30 to 70 wt% of an acrylate rubber polymer having an average particle diameter of 50 to 120 nm, 30 to 50 wt% of an aromatic vinyl compound, and 10 to 30 wt% of a vinyl cyan compound.

6. In paragraph 1, A thermoplastic resin composition characterized in that the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyan compound copolymer comprises 60 to 80 wt% of the methacrylic acid alkyl ester compound, 10 to 30 wt% of the aromatic vinyl compound, and 5 to 15 wt% of the vinyl cyan compound among a total of 100 wt% thereof, or has a weight average molecular weight of 90,000 to 200,000 g / mol.

7. In paragraph 1, The thermoplastic resin composition is characterized in that the transparency is maintained at 2.5 or less between the transparency measured according to ASTM D1003 after immersing a 3 mm thick sheet in a 70% isopropanol aqueous solution for 24 hours, taking it out, and leaving it for 30 minutes and the transparency measured according to ASTM D1003 before immersion.

8. In paragraph 1, The thermoplastic resin composition is characterized in that the tensile strength measured by ASTM D638 is 300 kg / cm.cm or more. 9.(A-1) 5 to 25 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; (A-2) 25 to 37 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle size of 150 to 300 nm; and (B) A step of melt mixing and extruding comprising 43 to 57 wt% of a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer; The above (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer comprises 80 wt% or less of the methacrylic acid alkyl ester compound among the total 100 wt% thereof, A method for producing a thermoplastic resin composition, characterized in that the above (A-1) and (A-2) are included in a weight ratio (A-1:A-2) of 1:0.8 to 1:3.

1. 10.(A-1) 5 to 25 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle diameter of 50 to 120 nm; (A-2) 25 to 37 wt% of an acrylic graft copolymer comprising an acrylate rubber polymer having an average particle size of 150 to 300 nm; and (B) A step of melt mixing and extruding comprising 43 to 57 wt% of a methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer; A method for producing a thermoplastic resin composition, wherein the (B) methacrylic acid alkyl ester compound-aromatic vinyl compound-vinyl cyanide compound copolymer comprises 80 wt% or less of the methacrylic acid alkyl ester compound among a total of 100 wt%, and a 3 mm thick sheet is immersed in a 70% isopropanol aqueous solution for 24 hours, taken out, left for 30 minutes, and the transparency measured according to ASTM D1003 and the transparency measured before immersion according to ASTM D1003 are characterized in that the transparency retention is 2.5 or less.

11. A molded product characterized by comprising a thermoplastic resin composition according to any one of claims 1 to 8.

12. In paragraph 11, A molded product characterized in that the molded product is a transparent container or a transparent part.