Resin composition

Abstract

To provide a resin composition which can improve mechanical performance while reducing carbon dioxide emissions.SOLUTION: A resin composition contains an ABS resin and a modified polyester resin, wherein the modified polyester resin contains a polyester material, a compatibilizer, a reinforcing agent, a crystallization inhibitor, a slip agent, and an antioxidant. The compatibilizer contains PP-MA, PE-MA, ABS-MA, E-MA-GMA, E-VA-GMA, POE-GMA, PE-GMA, ABS-GMA, or a combination thereof. The reinforcing agent contains POE, MBS, PTW, or a combination thereof. The crystallization inhibitor contains IPA copolyester, IPA and CHDM copolyester, PETG, PCTG, or a combination thereof. The slip agent contains stearate, polyethylene wax, modified silicone, a fluororesin, or a combination thereof. The antioxidant contains hindered phenolic, phenolic, phosphite-based antioxidants.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a resin composition. [Background technology]

[0002] Due to its well-balanced mechanical performance, glossy appearance, and electroplating applicability, acrylonitrile-butadiene-styrene copolymer resin (ABS resin) is widely used in various fields, including home appliances, power tools, electronic devices, office supplies, etc. However, ABS resin has a problem of high carbon emissions (approximately in the range of 3.5kgCO2 / kg to 4kgCO2 / kg). Therefore, as environmental awareness increases and the demand for carbon reduction in products increases, the introduction or replacement of materials with lower carbon emissions should be explored.

[0003] Specifically, compared to ABS resin, polyester resin (PET resin) offers the advantage of relatively low carbon emissions (ranging from about 2.6 kg CO2 / kg to 3 kg CO2 / kg), which can reduce carbon emissions by about 15% to 35%. In addition, recycled PET resin (RPET) can further reduce carbon emissions by 60% to 90% compared to virgin PET resin and 70% to 92% compared to ABS resin, depending on the recycling source. Thus, the introduction of PET resin into ABS resin can effectively reduce overall carbon emissions. However, when introducing PET resin into ABS resin, there are challenges to overcome due to the different properties of the two. ABS resin is an amorphous plastic with low polarity, while PET resin is a crystalline plastic with high polarity. This mismatch of properties results in poor compatibility between ABS resin and PET resin. As a result, the introduction of PET resin into ABS resin leads to phase separation, which can impair the mechanical performance of the product and reduce the surface gloss. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides a resin composition that can achieve improved mechanical performance while reducing carbon emissions. [Means for solving the problem]

[0005] In one embodiment of the present invention, a resin composition is provided that includes an ABS resin and a modified polyester resin. The modified polyester resin includes a polyester material, a compatibilizer, a toughening agent, a crystallization inhibitor, a slip agent, and an antioxidant. The compatibilizer includes PP-MA, PE-MA, ABS-MA, E-MA-GMA, E-VA-GMA, POE-GMA, PE-GMA, ABS-GMA, or a combination thereof. The toughening agent includes POE, MBS, PTW, or a combination thereof. The crystallization inhibitor includes IPA copolyester, IPA and CHDM copolyester, PETG, PCTG, or a combination thereof. The slip agent includes stearate, polyethylene wax, modified silicone, fluororesin, or a combination thereof. The antioxidant includes a hindered phenolic antioxidant, a phenolic antioxidant, a phosphite antioxidant, or a combination thereof.

[0006] According to one embodiment of the present invention, the amount of the compatibilizer added is in the range of 8% by weight to 18% by weight based on the total weight of the modified polyester resin.

[0007] According to one embodiment of the present invention, the amount of the toughening agent added is in the range of 3% by weight to 10% by weight based on the total weight of the modified polyester resin.

[0008] According to one embodiment of the present invention, the amount of the crystallization inhibitor added is in the range of 2% by weight to 8% by weight based on the total weight of the modified polyester resin.

[0009] According to one embodiment of the present invention, the amount of slip agent added ranges from 0.1% to 2% by weight based on the total weight of the modified polyester resin.

[0010] According to one embodiment of the present invention, the amount of antioxidant added is in the range of 0.1% by weight to 1% by weight based on the total weight of the modified polyester resin.

[0011] According to one embodiment of the present invention, the amount of polyester material added ranges from 61.0% to 86.8% by weight based on the total weight of the modified polyester resin.

[0012] According to one embodiment of the present invention, the amount of ABS material added ranges from 60% to 100% by weight based on the total weight of the resin composition.

[0013] According to one embodiment of the present invention, the total loading of ABS material and modified polyester resin is 100% by weight.

[0014] According to one embodiment of the present invention, the polyester material comprises virgin polyester pellets, recycled polyester pellets, or a combination thereof. Effect of the Invention

[0015] Based on the above, one or more embodiments of the present invention provide a resin composition that introduces modified polyester resin (using various additives such as compatibilizers, toughening agents, crystallization inhibitors, slip agents, and antioxidants) into ABS resin system, which improves the poor compatibility between the two and enhances impact resistance, flowability, and heat resistance. As a result, improved mechanical performance can be achieved while reducing carbon emissions.

[0016] In order to make the above features and advantages of the present invention more comprehensible, the following embodiments are described in detail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] In the following detailed description, exemplary embodiments disclosing specific details are set forth for purposes of explanation and not limitation in order to provide a thorough understanding of the various principles of the present invention. However, it will be apparent to one of ordinary skill in the art having the benefit of the present invention that the present invention may be practiced in other embodiments that depart from the specific details described herein. In addition, descriptions of well-known devices, methods and materials may be omitted so as not to obscure the description of the various principles of the present invention.

[0018] In the present invention, the ranges expressed by "a certain value to another value" are approximate expressions to avoid listing all the values ​​in the range in the present specification. Therefore, the description of a particular numerical range covers any numerical value in the numerical range and any smaller numerical range defined by any numerical value in the numerical range, just as if any numerical value and any smaller numerical range were explicitly stated in the present specification.

[0019] Ranges may be expressed herein as from "about" one particular value to "about" another particular value, and may be linearly expressed as one particular value and / or to another particular value. When such a range is expressed, another embodiment includes from the one particular value and / or to the other particular value. Similarly, when a value is expressed as an approximation, by use of "about," it will be understood that the particular value forms another embodiment. It will be further understood that the endpoints of each of the ranges are expressly related to, or independent of, the other endpoint.

[0020] Unless otherwise stated, the term "between" as used herein to define a numerical range is intended to cover a range equal to and between the recited endpoints. For example, if a size range is between a first value and a second value, the size range can cover the first value, the second value, and any value between the first value and the second value.

[0021] As used herein, non-limiting terms (eg, can, can be, or other similar terms) refer to non-required or optional implementations, inclusions, additions, or presence.

[0022] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as the meaning in the common knowledge or commonly understood meaning in the technical field to which the present invention belongs. It should be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having a meaning consistent with the meaning in the relevant technical context, and should not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0023] In this embodiment, the resin composition includes an ABS resin and a modified polyester resin, the modified polyester resin including a polyester material, a compatibilizer, a toughening agent, a crystallization inhibitor, a slip agent, and an antioxidant. Thus, in one or more embodiments of the present invention, the resin composition introduces a modified polyester resin (using various additives such as a compatibilizer, a toughening agent, a crystallization inhibitor, a slip agent, and an antioxidant) into an ABS resin system. This improves the poor compatibility between the two and enhances impact resistance, flowability, and heat resistance. As a result, improved mechanical performance can be achieved while reducing carbon emissions.

[0024] Specifically, the functions of the additives are described below. For example, a compatibilizer is used to improve the compatibility between the ABS resin and the polyester material, reduce the ratio of the polyester material dispersed in the ABS resin, and prevent a significant decrease in impact resistance due to large-scale phase separation. Therefore, the impact resistance can be effectively improved. A reinforcing agent is used to improve the impact resistance of the dispersed phase of the polyester material, and thus the impact resistance can be effectively improved. A crystallization inhibitor is used to reduce the crystallization rate of the polyester material and prevent crystal phase separation. A slip agent is used to improve the fluidity of the material and contribute to the fluidity and demolding characteristics during injection molding. An antioxidant is used to improve the heat resistance and processability of the material. Therefore, by modifying the polyester material with additives, the modified polyester material can be effectively introduced into the ABS resin, achieving good mechanical properties and processing performance while meeting the requirements of carbon reduction.

[0025] Here, the method of modifying the polyester resin includes, for example, melting the polyester material in a molten state by a twin-screw extruder, and adding and uniformly mixing the above-mentioned additives to the polyester material to disperse the additives and the polyester material in order to produce a molten modified polyester resin. Next, the molten modified polyester resin is extruded in a strip shape through a die, and the strip is pelletized with cooling water to obtain the modified polyester resin provided by the present invention. The modified polyester resin may subsequently be mixed with ABS resin pellets in a dry blend method and extrusion molded or injection molded to obtain a desired product, but this should not be construed as a limitation in the present invention.

[0026] The details of the ABS resin, polyester material, compatibilizer, reinforcing agent, crystallization inhibitor, slip agent, and antioxidant are described below.

[0027] <ABS resin>

[0028] In some embodiments, ABS resin may be formed by copolymerizing acrylonitrile, butadiene, and styrene in appropriate ratios, but this should not be construed as a limitation on the present invention. For example, a specific example of an ABS resin is product AG12A0 from Formosa Chemicals & Fibre Corporation.

[0029] In some embodiments, the amount of ABS resin added is in the range of 60% by weight to 100% by weight based on the total weight of the resin composition, but this should not be construed as a limitation in the present application. Here, the resin composition is composed of ABS resin and modified polyester resin, in other words, the total amount of ABS resin and modified polyester resin added is 100% by weight, but this should not be construed as a limitation in the present invention.

[0030] <Polyester material>

[0031] In some embodiments, the polyester material comprises virgin polyester pellets, recycled polyester pellets, or a combination thereof. For example, since ABS resin has poor recyclability and the application of recycled ABS resin is limited to producing only black products, the good recyclability (stable and easily distinguishable recycled source) of polyester material that can be applied to produce transparent, white, or other colored products allows the introduction of recycled polyester pellets into the ABS resin system, which contributes to reducing plastic and material carbon footprint. Also, the resulting products are environmentally friendly and multicolored. However, this should not be construed as a limitation in this application. In this case, the mechanical performance and shrinkage rate of the recycled polyester pellets are similar to those of virgin polyester pellets.

[0032] In some embodiments, sources of recycled polyester pellets include recycled pellets for bottles (e.g., PET bottles), production waste from polyester films, recycled and regenerated polyester pellets from industrial release films, recycled polyester pellets from polyester fibers, recycled pellets from electronic trays, recycled pellets from packaging trays, or combinations thereof, but this should not be construed as a limitation on the present invention.

[0033] In some embodiments, the intrinsic viscosity (IV) of the polyester material after the polyester material is polymerized ranges from 0.6 dL / g to 0.86 dL / g. Thus, within the range of IV after the polyester material is polymerized, the polyester material can effectively increase the length of the molecular chain to improve properties such as impact resistance, but this should not be construed as a limitation in the present invention. Here, IV is determined by ASTM D2857 test method. The IV of the polyester material can be improved through solid polymerization and / or liquid polymerization. A specific implementation method of solid polymerization may include subjecting the solid PET material to a low pressure and high temperature (150°C to 180°C) process to achieve the required IV (0.6 dL / g to 0.86 dL / g). A specific implementation method of liquid polymerization may include melting the solid PET material into a liquid form and subjecting the liquid PET material to vacuum polymerization in an extruder to reach the required IV (0.6 dL / g to 0.86 dL / g), which may be followed by a pelletization process for further processing.

[0034] In some embodiments, the loading of the polyester material ranges from 61.0% to 86.8% by weight based on the total weight of the modified polyester resin, although this should not be construed as a limitation on the present invention.

[0035] <Compatibilizer>

[0036] In some embodiments, the compatibilizer comprises PP-MA, PE-MA, ABS-MA, E-MA-GMA, E-VA-GMA, POE-GMA, PE-GMA, ABS-GMA, or a combination thereof. In other words, the compatibilizer can be one or more of the above graft copolymers, and this should not be construed as a limitation on the present invention.

[0037] In some embodiments, the amount of the compatibilizer added to the total weight of the modified polyester resin is in the range of 8% by weight to 18% by weight. For example, to achieve an improved compatibilization effect, the amount of the compatibilizer added to the total weight of the modified polyester resin may be in the range of 10% by weight to 15% by weight, but this should not be construed as a limitation in the present invention.

[0038] <Reinforcement agent>

[0039] In some embodiments, the toughening agent comprises POE, MBS, PTW, or a combination thereof. In other words, the toughening agent may be one or more of the above polymers, and this should not be construed as a limitation in the present invention. Other suitable ACRs may also be used as toughening agents.

[0040] In some embodiments, the amount of the toughening agent added to the total weight of the modified polyester resin is in the range of 3% by weight to 10% by weight. For example, to achieve improved toughening effect, the amount of the toughening agent added to the total weight of the modified polyester resin may be in the range of 5% by weight to 8% by weight, but this should not be construed as a limitation in the present invention.

[0041] <Crystallization inhibitor>

[0042] In some embodiments, the crystallization inhibitor comprises an IPA copolymer, an IPA and CHDM copolymer, poly(ethylene terephthalate c-1,4-cyclohexylene dimethylene terephthalate) (e.g., PETG, PCTG, where PETG and PCTG have different ratios of CHDM), or a combination thereof. In other words, the crystallization inhibitor can be one or more of the above polymers, but this should not be construed as a limitation on the present invention.

[0043] In some embodiments, the amount of crystallization inhibitor added to the total weight of the modified polyester resin is in the range of 2% by weight to 8% by weight. For example, to achieve improved crystallization inhibition effect, the amount of crystallization inhibitor added to the total weight of the modified polyester resin may be in the range of 4% by weight to 6% by weight, but this should not be construed as a limitation in the present invention.

[0044] <Slip agent>

[0045] In some embodiments, the slip agent comprises stearates, polyethylene waxes, modified silicones, fluororesins, or combinations thereof. That is, the slip agent can be one or more of the materials listed above, but this should not be construed as a limitation on the present invention. Here, for example, stearate refers to zinc stearate, modified silicone refers to surface-modified silica, and fluororesin refers to PTFE.

[0046] In some embodiments, the amount of slip agent added ranges from 0.1% to 2% by weight based on the total weight of the modified polyester resin. For example, to achieve improved flowability, the amount of slip agent added may range from 0.5% to 1% by weight based on the total weight of the modified polyester resin, but this should not be construed as a limitation in the present invention.

[0047] <Antioxidants>

[0048] In some embodiments, the antioxidant comprises a hindered phenolic antioxidant, a phenolic antioxidant, a phosphite antioxidant, or a combination thereof. That is, the antioxidant is one or more of the above-mentioned materials, but this should not be construed as a limitation in the present invention. Here, for example, the hindered phenolic antioxidant refers to AO-1010, AO-1076, AO-1315, the phenolic antioxidant refers to AO-20 and GP-45, and the phosphite antioxidant refers to AO-168, AO-618, TNPP.

[0049] In some embodiments, the amount of antioxidant added is in the range of 0.1% by weight to 1% by weight based on the total weight of the modified polyester resin. For example, to achieve improved antioxidant effect, the amount of antioxidant added is in the range of 0.3% by weight to 0.5% by weight based on the total weight of the modified polyester resin, but this should not be construed as a limitation in the present invention.

[0050] It should be noted that the polyester provided in this invention is equivalent to polyethylene terephthalate (PET).

[0051] In order to describe the effects of the present invention in detail, examples and comparative examples are provided below, but the scope of the present invention is not limited to those provided in the examples.

[0052] The ASTM standard test pieces produced in each of the Examples and Comparative Examples were evaluated according to the following methods.

[0053] Specific gravity: Measured based on the ASTM D792 standard test method.

[0054] Impact resistance: Measured based on the ASTM D256 standard test method, a value (kg-cm / cm) was obtained that represents the total energy that the test piece can withstand at the breaking point. The higher the value, the higher the impact resistance (or resistance) of the test piece.

[0055] Tensile strength: Measured according to the ASTM D638 standard test method, a value was obtained that represents the total energy that the test piece can withstand in tensile deformation. The higher the value, the higher the tensile strength of the test piece.

[0056] Flexural strength: Measured according to the ASTM D790 standard test method to obtain a value that represents the resistance of the test piece to bending strain and deformation. The higher the value, the higher the flexural strength of the test piece.

[0057] Flexural modulus: Measured according to the ASTM D790 standard test method, the value represents the total energy that the test piece can withstand bending strain and deformation. The higher the value, the higher the rigidity of the test piece.

[0058] Heat distortion temperature (HDT): Measured according to the ASTM D648 standard test method to obtain a value that represents the resistance of the test piece to thermal distortion. The higher the value, the higher the heat resistance of the test piece.

[0059] Shrinkage: Measured according to the ASTM D955 standard test method, "shrinkage" refers to the difference (percentage) between the dimensions of a plastic product that has cooled and solidified from a mold and the dimensions of the original mold.

[0060] <Comparative Examples 1 to 3 and Examples 1 to 2>

[0061] ASTM standard test pieces were made using the resin composition with the ratio shown in Table 1 through injection molding, and the mechanical properties of the test pieces were tested. In Table 1, the components of the modified polyester resin include 77% by weight of modified polyester pellets (having an IV of 0.8 dL / g, the recycled source of which is release film recycled polyester pellets), 12% by weight of compatibilizer (E-MA-GMA), 5% by weight of toughening agent (MBS), 5% by weight of crystallization inhibitor (poly(ethylene terephthalate cо-1,4-cyclohexylene dimethylene terephthalate)), 0.5% by weight of slip agent (polyethylene wax), and 0.5% by weight of antioxidant (AO-1010+AO-618, ratio 1:1). The ABS resin used here is AG12A0, a product of Formosa Chemicals & Fibre Corporation, and the unmodified polyester resin used here is PET-3380R, a product of Nan Ya Plastics Corporation (having an IV of 0.8 dL / g).

[0062] [Table 1]

[0063] The relevant properties of the ASTM standard test pieces prepared for the test were tested and the details are shown in Table 1. After comparing the results of Comparative Examples 1-3 and Examples 1-2, the following conclusions were obtained. In Examples 1-2, the properties other than impact resistance are similar compared to Comparative Examples 1-3, while the impact resistance can be effectively improved. Therefore, there is an obvious improvement in mechanical performance. Specifically, when the unmodified polyester resin provided in Comparative Examples 2-3 is introduced into ABS resin, phase separation occurs, thus resulting in a significant decrease in impact resistance, tensile strength, and HDT. Meanwhile, in Examples 1-2, the compatibility problem can be overcome through various additives, thus ensuring that the mechanical performance of the material is maintained at a similar level to that of ABS resin.

[0064] Based on the above, the resin composition provided in one or more embodiments of the present invention introduces modified polyester resin (using various additives such as compatibilizers, toughening agents, crystallization inhibitors, slip agents, and antioxidants and modified polyester materials) into ABS resin, which can improve the poor compatibility between the two and enhance impact resistance, fluidity, and heat resistance. As a result, improved mechanical performance can be achieved while reducing carbon emissions.

[0065] It will be apparent to those skilled in the art that various modifications and variations can be made to the described embodiments without departing from the scope or spirit of the present invention. In view of the foregoing, it is intended that the present invention cover modifications and variations provided they come within the scope of the appended claims and their equivalents. [Industrial Applicability]

[0066] The resin composition of the present invention can improve the poor compatibility between ABS resin and modified polyester resin, and enhance impact resistance, fluidity, and heat resistance, thereby improving mechanical performance while reducing carbon emissions.

Claims

1. A resin composition comprising an ABS resin and a mixture thereof, The amount of the ABS resin added is in the range of 60% by weight to 75% by weight based on the total weight of the resin composition, The mixture is a polyester material, which is PET, and the loading amount is in the range of 61.0% to 86.8% by weight based on the total weight of the mixture; a compatibilizer comprising PP-MA, PE-MA, ABS-MA, E-MA-GMA, E-VA-GMA, POE-GMA, PE-GMA, ABS-GMA, or a combination thereof, the amount added being in the range of 8% to 18% by weight based on the total weight of the blend; a toughening agent comprising POE, MBS, PTW, or a combination thereof, the amount of which ranges from 3% to 10% by weight based on the total weight of the mixture; a crystallization inhibitor comprising an IPA copolyester, an IPA and CHDM copolyester, poly(ethylene terephthalate co-1,4-cyclohexylene dimethylene terephthalate), or a combination thereof, the amount of which ranges from 2% to 8% by weight based on the total weight of the mixture; a slip agent comprising a stearate, a polyethylene wax, a modified silicone, a fluororesin, or a combination thereof, the amount of which ranges from 0.1% to 2% by weight based on the total weight of the mixture; Antioxidants including hindered phenolic antioxidants, phenolic antioxidants, phosphite antioxidants, or combinations thereof, in amounts ranging from 0.1% to 1% by weight based on the total weight of the mixture. Consists of: Resin composition.

2. The polyester material comprises virgin polyester pellets, recycled polyester pellets, or a combination thereof. The resin composition according to claim 1.

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