A pc / abs resin composition, a method for preparing the same, and an application thereof

Abstract

The application discloses a PC / ABS resin composition and belongs to the field of high polymer materials. The PC / ABS resin composition comprises the following components: PC resin 49-91 parts; ABS resin 10-50 parts; compatibility agent 2-6 parts; composite odor inhibitor 0.5-5 parts; stabilizer 0.1-0.8 parts; other auxiliary agents 0-2 parts; the composite odor inhibitor is at least one selected from a compound of metal organic framework material and cyclodextrin or a compound of metal organic framework material and cyclodextrin derivative; and the stabilizer is selected from a benzotriazole ultraviolet absorber. The PC / ABS resin material provided by the application can realize low odor, high mechanical property retention rate and high weather resistance, and can be used for preparing automobile accessories and electronic equipment accessories.

Description

Technical Field

[0001] This invention belongs to the field of polymer materials, and specifically relates to a PC / ABS resin composition, its preparation method, and its application. Background Technology

[0002] PC / ABS resin, as a high-performance polymer alloy material, combines the high strength, high heat resistance, and impact resistance of polycarbonate with the processing fluidity, cost advantage, and surface quality of acrylonitrile-butadiene-styrene copolymer. It is widely used in fields with stringent requirements for comprehensive performance, such as automotive interiors, electronic and electrical housings, and household appliances.

[0003] However, this material commonly suffers from an irritating odor due to the release of volatile organic compounds during processing and end-use, which has become a key technical bottleneck restricting its promotion in high-end applications, especially in enclosed space products. This odor mainly originates from residual active monomers and oligomers within the resin system, thermo-oxidative degradation products during processing, and various additives introduced to achieve functionalizations such as flame retardancy and stability. For example, commonly used brominated flame retardants easily decompose under high-temperature processing conditions, producing irritating bromine-containing gases; incompletely reacted acrylonitrile monomers or their release during high-temperature degradation; and hydrolytic degradation reactions caused by moisture in the presence of water during the high-temperature melting of polycarbonate resin all significantly degrade the odor.

[0004] In prolonged high-temperature and high-humidity environments, PC / ABC resin materials continuously release small-molecule volatiles such as aldehydes, phenols, and benzene compounds, causing sensory discomfort for users and raising concerns about air quality and health safety. Although the industry has made improvements by optimizing raw material purity, refining drying processes, and adjusting formulations, existing solutions still struggle to effectively address the low-odor requirement of high-strength, high-weather-resistant PC / ABS systems during production and use, while balancing overall material performance, processing efficiency, and cost control.

[0005] Chinese invention patent CN101982499A discloses a low-odor PC / ABS composite material and its preparation method. The odor inhibitor in this application is selected from molecular sieves, fine-porous silica gel materials, porous polymer resins, and alkali metal aluminosilicates. These adsorbents have poor compatibility with the matrix, causing stress concentration after addition, leading to a decrease in impact strength and tensile toughness, and the porous structure accelerates the expansion of crazes. Under humid and hot environments, the adsorbents are prone to water absorption and saturation failure, alkali metal ion migration causes surface precipitates and catalytic degradation, and ultraviolet irradiation causes the porous polymer to decompose itself, resulting in secondary pollution. Therefore, there is still room for further optimization of the odor problem of PC / ABS materials.

[0006] Developing a PC / ABS resin that can significantly suppress the generation of irritating odors during processing and use, while maintaining high mechanical properties and high weather resistance, and its preparation method, is an important issue that urgently needs to be addressed in the industry. Summary of the Invention

[0007] One of the objectives of this invention is to solve the above-mentioned technical problems and provide a PC / ABS resin composition with high mechanical properties, high weather resistance, and low odor.

[0008] Another object of the present invention is to provide a method for preparing the above-mentioned PC / ABS resin composition.

[0009] Another object of the present invention is to provide the application of the above-described PC / ABS resin composition.

[0010] Another object of the present invention is to provide an automotive interior part comprising the above-described PC / ABS resin composition.

[0011] This invention is achieved through the following technical solution:

[0012] A PC / ABS resin composition, comprising the following components in parts by weight:

[0013]

[0014] The composite odor inhibitor is selected from at least one of a compound of metal-organic framework materials and cyclodextrin or a compound of metal-organic framework materials and cyclodextrin derivatives.

[0015] The stabilizer is selected from benzotriazole ultraviolet absorbers.

[0016] This invention utilizes metal-organic frameworks (MOFs) to reduce odor in PC / ABS resin compositions. The pore size of the MOFs can capture small odor molecules such as aldehydes and benzene compounds; the open metal sites in the MOFs coordinate with oxygen / nitrogen-containing polar molecules such as aldehydes and amines; and the MOFs can also degrade organic pollutants into CO2 / H2O through a Fenton-like reaction. The upper limit of the adsorption capacity of MOFs is several times that of traditional zeolite adsorbents, and they still have a highly efficient adsorption effect on low concentrations of VOCs.

[0017] The metal-organic framework material of this invention is a coordination polymer consisting of at least one metal component (selected from the group consisting of metal ions, metal oxide clusters, metal hydroxide clusters, or combinations thereof) and at least one multidentate organic ligand, bonded together by coordination bonds to form a long-range ordered, periodically expanding crystalline network structure. This network structure defines regular cavities and / or channels within it.

[0018] Specifically, the metal-organic framework material of the present invention can be selected from any one or more of the IRMOF series, ZIF series, PCN series, MIL series, and UiO series; the metal-organic framework materials that can achieve the technical effects of the present invention are not limited to the aforementioned specific metal-organic framework materials.

[0019] The IRMOF series consists of cubic porous materials formed by coordination bonds between zinc metal cluster nodes (structural unit Zn4O) and linear dicarboxylic acid ligands.

[0020] The ZIF series is a zeolite topological structure material formed by the tetrahedral coordination connection of zinc ions or cobalt ions with imidazole ligands.

[0021] The PCN series consists of porous materials constructed by modular assembly of copper, zirconium, or iron polymetallic clusters and multidentate carboxylic acid ligands.

[0022] The MIL series consists of materials with dynamic channels or large pore structures formed by trivalent metal ions of chromium, iron or aluminum and carboxylic acid ligands.

[0023] The UiO series is composed of zirconium or hafnium hexanuclear oxygen clusters (structural unit [Zr6O4(OH)4)). 12+ Or [Hf6O4(OH)4] 12+ ( ) and dicarboxylic acid ligands form a face-centered cubic structure material.

[0024] The aforementioned series of materials encompass their structural isomers, defect-modified products, and equivalent variants formed by stoichiometric adjustments.

[0025] More preferably, the metal-organic framework material is selected from any one or more of the ZIF series, MIL series, and UiO series.

[0026] Specifically, the metal-organic framework material can be selected from IRMof-1 (chemical composition Zn4O(BDC)3, where BDC is terephthalic acid), IRMof-3 (chemical composition Zn4O(NH2-BDC)3, where NH2-BDC is 2-aminoterephthalic acid), ZIF-8 (chemical composition Zn(mIM)2, where mIM is 2-methylimidazolium), ZIF-67 (chemical composition Co(mIM)2), and PCN-222 (chemical composition Zr6O4(OH)4(TCPP)). 1.5 TCPP is tetrakis(4-carboxyphenyl)porphyrin, and PCN-250 (chemical composition Fe3O(CH3COO)6(BTC)) 1.5Among them, BTC is pyromellitic acid), MIL-101(Cr) (chemical composition Cr3F(H2O)2O(BDC)3·nH2O), MIL-53(Al) (chemical composition Al(μ2-OH)(BDC)(H2O)), UiO-66 (chemical composition Zr6O4(OH)4(BDC)6), and UiO-67 (chemical composition Zr6O4(OH)4(BPDC)6, where BPDC is 4,4′-biphenyldicarboxylic acid).

[0027] Cyclodextrins and their derivatives exhibit a high adsorption effect on styrene. Their organic framework structure is similar to that of PC / ABS resin, which can improve dispersion uniformity. Compared with traditional polymer resins, which are prone to swelling and failure, the cross-linking structure of cyclodextrins and their derivatives can effectively prevent cavity collapse in humid and hot environments.

[0028] The cyclodextrins described in this invention are selected from any one or more of α-cyclodextrin, β-cyclodextrin, or γ-cyclodextrin. The α, β, and γ-cyclodextrins are cyclic oligomers composed of 6, 7, and 8 D(+)-pyranose glucose molecules, respectively, with molecular weights of 973, 1135, and 1297. The cyclodextrin molecules are hollow cylindrical structures that are wider at the top and narrower at the bottom, with open ends. The interior of the cavity is relatively hydrophobic, while all hydroxyl groups are distributed on the outside of the molecule.

[0029] The preferred cyclodextrin is selected from α-cyclodextrin.

[0030] The cyclodextrin derivatives of the present invention are selected from any one or more of the chemically modified products of α-cyclodextrin, β-cyclodextrin, or γ-cyclodextrin. The chemical modification involves replacing at least one hydrogen atom of a hydroxyl group in the glucose unit of the parent cyclodextrin with at least one substituent selected from alkyl, hydroxyalkyl, sulfonyl, carboxylic acid, amino, sulfate, or phosphate groups. The substituent is covalently linked to the carbon atom of the glucose unit.

[0031] Preferably, the cyclodextrin derivative is selected from any one or more of α-cyclodextrin derivatives, β-cyclodextrin derivatives, or γ-cyclodextrin derivatives; wherein the α-cyclodextrin derivative is selected from at least one of alkylated-α-cyclodextrin, hydroxyalkylated-α-cyclodextrin, sulfonated-α-cyclodextrin, carboxylated-α-cyclodextrin, aminolated-α-cyclodextrin, sulfated-α-cyclodextrin, and phosphated-α-cyclodextrin; and wherein the β-cyclodextrin derivative is selected from alkylated-β-cyclodextrin. The γ-cyclodextrin derivative is selected from at least one of hydroxyalkylated γ-cyclodextrin, sulfonylated γ-cyclodextrin, carboxylated γ-cyclodextrin, aminolated γ-cyclodextrin, sulfated esterified γ-cyclodextrin, and phosphated esterified γ-cyclodextrin;

[0032] Specifically, the cyclodextrin derivatives of the present invention may be selected from any one or more of allyl-β-cyclodextrin, methylated-β-cyclodextrin, hydroxypropyl-β-cyclodextrin, sulfobutyl ether-β-cyclodextrin, hydroxyethyl-β-cyclodextrin, and carboxymethyl-β-cyclodextrin; the cyclodextrin derivatives that can achieve the technical effects of the present invention are not limited to the aforementioned specific types.

[0033] In this invention, the use of a complex of metal-organic framework materials and cyclodextrin or a complex of metal-organic framework materials and cyclodextrin derivatives exhibits better mechanical properties and adsorption effects compared to traditional adsorbent materials or using only one of the three materials.

[0034] Based on the use of metal-organic framework materials and cyclodextrin complexes or metal-organic framework materials and cyclodextrin derivatives in this invention, benzotriazole ultraviolet absorbers are further selected, which can simultaneously enhance the odor suppression effect and weather resistance.

[0035] Benzotriazole UV absorbers can prevent chain degradation reactions in polymer resins such as PC and ABS, reduce the generation of small molecules, and thus improve weather resistance while also improving odor.

[0036] The benzotriazole ultraviolet absorber of the present invention has a rigid planar skeleton of benzo[d][1,2,3]triazole.

[0037] Specifically, the benzotriazole ultraviolet absorbers described in this invention are selected from any one or more of 2-(2H-benzotriazole-2-yl)-4,6-di-tert-pentylphenol and 2,2'-methylenebis[6-(2H-benzotriazole-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol]. The specific benzotriazole ultraviolet absorbers that can achieve the technical effects of this invention are not limited to the aforementioned specific types.

[0038] In this invention, the weight parts of the PC resin can be 49 parts, 50 parts, 52 parts, 55 parts, 58 parts, 60 parts, 63 parts, 65 parts, 67 parts, 70 parts, 72 parts, 75 parts, 78 parts, 80 parts, 83 parts, 85 parts, 87 parts, 90 parts, 91 parts, or any range formed by the above values.

[0039] In the PC / ABS resin composition provided by the present invention, the mass content of the PC resin is not less than 45%.

[0040] The PC resin described in this invention is polymerized using the phosgene method.

[0041] The phosgene polymerization process for the PC resin involves mixing an aqueous solution of sodium bisphenol A with dichloromethane solvent to form a water-organic two-phase system under inert gas protection. The reaction temperature is controlled at 25-35°C, and phosgene is introduced to carry out interfacial polycondensation. A molecular weight regulator (such as p-tert-butylphenol) and a phase transfer catalyst (triethylamine, 0.5-3 wt%) are added simultaneously. The pH of the system is maintained at 9-10 to promote the nucleophilic substitution reaction between the active chloroformate groups generated by phosgene hydrolysis and the bisphenol A salt. After the polycondensation is completed, the resin is neutralized with hydrochloric acid and washed with water to remove salt and residual catalyst. Finally, high molecular weight (Mw>30kDa) and low chloride ion content (<5ppm) PC resin is obtained by hot melt extrusion granulation.

[0042] Preferably, the PC resin is selected from bisphenol A type polycarbonate.

[0043] Preferably, the PC resin has a melt index of 5-15 g / 10 min, the test standard is ISO 1133-1-2022, and the test conditions are 300℃ and 1.2 kg.

[0044] The ABS resin described in this invention is produced by bulk polymerization.

[0045] The bulk polymerization process of the ABS resin adopts a solvent-free homogeneous reaction system and is achieved through a two-stage continuous reaction: First, butadiene rubber is dissolved in styrene and acrylonitrile monomers, and a free radical initiator is added to carry out a prepolymerization reaction at 80-120°C, controlling the conversion rate to 10-40% to form a graft copolymer with a core-shell structure (rubber phase as core, SAN copolymer as shell); then the prepolymer is transferred to a high-temperature reactor, and high-conversion (>90%) polymerization is completed at 160-220°C. The residual monomers are removed by vacuum devolatilization treatment, and finally pure ABS resin is obtained.

[0046] This process produces no wastewater and yields products with high gloss, low impurity residue (no emulsifier), and a controllable island-shaped two-phase morphology. The rubber phase has a particle size of 0.1-5μm, making it suitable for high-impact electronic casings and transparent products (transmittance >85%).

[0047] In this invention, the weight parts of the ABS resin can be 10 parts, 12 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 48 ​​parts, 50 parts, etc., or any range formed by any two of the above values.

[0048] Preferably, the melt index of the ABS resin is 6-12 g / 10 min, the test standard is ISO 1133-1-2022, and the test conditions are 220℃ and 10 kg.

[0049] More preferably, the melt index of the ABS resin is 7-10 g / 10 min, the test standard is ISO 1133-1-2022, and the test conditions are 220℃ and 10 kg.

[0050] Preferably, the ABS resin is de-volatile at 80-100°C for 6-8 hours in a dehumidifying dryer.

[0051] Styrene monomer residue is caused by incomplete ABS synthesis. After devolatilization, the amount of styrene monomer residue and humidity in the ABS resin will be lower. The lower the styrene monomer content, the better the odor of the resulting PC / ABS resin composition.

[0052] The residual amount of styrene monomer was measured using a VOC analyzer.

[0053] Preferably, the residual styrene monomer content of the ABS resin is 0-100 ppm.

[0054] More preferably, the residual styrene monomer content of the ABS resin is 0.01-75 ppm.

[0055] More preferably, the residual styrene monomer content of the ABS resin is 0.02-50 ppm.

[0056] In this invention, the compatibilizer can be in the following weight proportions: 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, or any range formed by any two of the above values.

[0057] Preferably, the compatibilizer is selected from ABS grafted maleic anhydride.

[0058] Preferably, the grafting rate of the ABS grafted with maleic anhydride is 0.5-2.5%.

[0059] The grafting rate test standard for maleic anhydride grafts is ISO 11358-2022.

[0060] In this invention, the weight parts of the compound odor inhibitor can be 0.5 parts, 0.6 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 4.9 parts, 5 parts, etc., or any range formed by any two of the above values.

[0061] In the PC / ABS resin composition provided by this invention, the mass content of the composite odor inhibitor is 0.3%-5%.

[0062] In this invention, the mass content of the compound odor inhibitor can be: 0.3%, 0.5%, 0.7%, 0.9%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.3%, 4.5%, 4.7%, 4.9%, 5%, etc., or any range formed by any two of the above values.

[0063] Preferably, the mass content of the compound odor inhibitor is 1%-4%.

[0064] Preferably, the mass ratio of metal-organic framework material to cyclodextrin in the metal-organic framework material and cyclodextrin compound, or the mass ratio of metal-organic framework material to cyclodextrin derivative in the metal-organic framework material and cyclodextrin derivative compound, is (1-4):(1-4).

[0065] When the metal-organic framework material and cyclodextrin or cyclodextrin derivative are in a mass ratio range of (1-4):(1-4), their pore structures are complementary, which can provide sufficient adsorption sites and avoid pore blockage, thereby improving adsorption efficiency.

[0066] A further preferred embodiment is that the mass ratio of metal-organic framework material to cyclodextrin or cyclodextrin derivative is (1-2):(1-2).

[0067] When the mass ratio of metal-organic framework materials to cyclodextrin or cyclodextrin derivatives is in the range of (1-2):(1-2), the synergistic effect between the metal nodes of the metal-organic framework materials and the hydroxyl groups of cyclodextrin is enhanced, thereby improving the binding ability to polar odor molecules.

[0068] More preferably, the mass ratio of metal-organic framework material to cyclodextrin or cyclodextrin derivative is 1:(1-2).

[0069] More preferably, the mass ratio of metal-organic framework material to cyclodextrin or cyclodextrin derivative is 1:2.

[0070] Preferably, the other additives are selected from any one or more of antioxidants, lubricants, release agents, heat stabilizers or toughening agents; those skilled in the art can increase or decrease the types and / or content of other additives according to actual needs, and other additives are not limited to the types of additives listed above.

[0071] Specifically, the antioxidant is 0-1 parts by weight, the lubricant is 0-1 parts by weight, the release agent is 0-1 parts by weight, the heat stabilizer is 0-1 parts by weight, and the toughening agent is 0-1 parts by weight.

[0072] Preferably, the antioxidant is selected from any one or more of hindered phenols or phosphites; the lubricant is selected from any one or more of fatty acid esters, fatty acid amides, hydrocarbon waxes, metal soaps, or polysiloxanes; the mold release agent is selected from any one or more of fatty acid esters, fatty alcohols, fatty amides, organosilicon compounds, or fluorine-containing compounds; the heat stabilizer is selected from any one or more of calcium-zinc stabilizers, organotin stabilizers, rare earth stabilizers, or β-diketones; and the toughening agent is selected from any one or more of ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), methyl methacrylate-butadiene-styrene copolymer (MBS), acrylate copolymer (ACR), or reactive toughening agents.

[0073] This invention provides a method for preparing a PC / ABS resin composition: all components are mixed evenly according to the specified ratio, and then melt-blended, extruded, and granulated.

[0074] Preferably, a twin-screw extruder is used for extrusion.

[0075] Preferably, the screw speed of the twin-screw extruder is 350-450 rpm.

[0076] Preferably, the screw diameter of the twin-screw extruder is 35 mm, and the length-to-diameter ratio (L / D) is 40:1-50:1.

[0077] Preferably, the melting temperature during melt blending is 210-250℃.

[0078] The present invention also provides an application of a PC / ABS resin composition for the preparation of automotive parts and electronic device parts.

[0079] Specifically, the PC / ABS resin composition provided by this invention can be used to prepare automotive interior parts, electronic device housings, and other components with high requirements for odor.

[0080] The present invention also provides an automotive interior component comprising the above-mentioned PC / ABS resin composition.

[0081] Compared with the prior art, the present invention has the following advantages:

[0082] This invention employs a combination of metal-organic framework materials and cyclodextrin derivatives to capture small molecule volatiles through a dual process of physical adsorption and molecular inclusion.

[0083] The introduction of benzotriazole UV absorbers into the system of this invention can inhibit the formation of thermal degradation products and reduce the odor of PC / ABS resin. The nitrogen atoms of benzotriazole UV absorbers can coordinate with the metal nodes in metal-organic framework materials, improving hygrothermal stability. Furthermore, the adsorption of benzotriazole UV absorbers on the surface of metal-organic framework materials can block the contact between O2 / H2O in the environment and the metal center, especially delaying framework degradation in acidic or high-humidity environments.

[0084] In addition, metal-organic framework materials and cyclodextrin derivatives can improve UV absorption. With the synergistic effect of the above components, PC / ABS resin materials can achieve a balance between low odor, high mechanical property retention, and high weather resistance.

[0085] The PC / ABS resin composition preparation process provided by this invention is simple, requires low equipment, is suitable for industrial production, and can be widely used in automobiles, home appliances and other fields. Detailed Implementation

[0086] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0087] The raw materials used in this invention are sourced from:

[0088] PC Resin 1: PC2070, melt index 7.5g / 10min, test standard is ISO 1133-1-2022, test conditions are 300℃, 1.2kg, Wanhua Chemical.

[0089] PC Resin 2: PC 2100, melt index 9g / 10min, test standard is ISO 1133-1-2022, test conditions are 300℃, 1.2kg, Wanhua Chemical.

[0090] PC Resin 3: PC 2220, melt index 20g / 10min, test standard is ISO 1133-1-2022, test conditions are 300℃, 1.2kg, Wanhua Chemical.

[0091] ABS resin 1: ABS275; melt index is 8.5, test conditions are 220℃, 10kg; undevoured, styrene monomer residue 80ppm≤ABS≤100ppm, Gaoqiao Petrochemical.

[0092] ABS Resin 2: ABS275; melt index is 8.5, test conditions are 220℃, 10kg; after devolatilization, styrene monomer residue is 60ppm≤ABS≤75ppm (Gaoqiao Petrochemical).

[0093] ABS resin 3: ABS275; melt index is 8.5, test conditions are 220℃, 10kg; after devolatilization, styrene monomer residue is 30ppm≤ABS≤50ppm, Gaoqiao Petrochemical.

[0094] Metal-organic framework material 1: ZIF-8, KARGEN-ZIF-8, ZIF series, Xi'an Qiyue Biotechnology.

[0095] Metal-organic framework material 2: MIL-101(Cr), KAR-F39, MIL series, Xi'an Qiyue Biotechnology.

[0096] Metal-organic framework material 3: UiO-66, RuixiBio-UiO-66, UiO series, Xi'an Ruixi Biotechnology.

[0097] Cyclodextrin: α-CD, Xi'an Qiyue Biotechnology.

[0098] Cyclodextrin derivatives: Allyl-β-cyclodextrin, Allyl-β-CD, Xi'an Qiyue Biotechnology.

[0099] Compound Odor Inhibitor 1:

[0100] Raw material Mass ratio Metal-organic framework material 1 4 Cyclodextrin 1

[0101] Compound Odor Inhibitor 2:

[0102]

[0103]

[0104] Compound Odor Inhibitor 3:

[0105] Raw material Mass ratio Metal-organic framework material 1 1 Cyclodextrin 2

[0106] Compound Odor Inhibitor 4:

[0107] Raw material Mass ratio Metal-organic framework material 2 1 Cyclodextrin derivative 2

[0108] Compound Odor Inhibitor 5:

[0109] Raw material Mass ratio Metal-organic framework material 3 1 Cyclodextrin derivative 2

[0110] Compatibilizer 1: ABS grafted with maleic anhydride, HW-102M, grafting rate 2%, Huawen.

[0111] Compatibilizer 2: ABS grafted with maleic anhydride, HZAA, grafting rate 0.6%, Dalian Haizhou.

[0112] Stabilizer 1: Benzotriazole UV absorber, 2-(2H-benzotriazole-2-yl)-4,6-diterpentylphenol, 328, BASF.

[0113] Stabilizer 2: Benzotriazole UV absorber, 2,2'-methylenebis[6-(2H-benzotriazole-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol], 360, BASF.

[0114] Stabilizer 3: Benzophenone-based ultraviolet absorbers, UV-9, McLean.

[0115] Other additives 1: Antioxidant 1010, SONOX 1010, Mitutoyo Chemical.

[0116] Other additives 2: Antioxidant 168, SONOX 168, Mitutoyo Chemical.

[0117] Test methods:

[0118] (1) Impact performance retention rate: ISO 179-1-2010; Prepare specimens conforming to standard dimensions (Type 1 notched specimens, type A notch) and acclimatize them in a standard environment (23±2℃, 50±10% relative humidity) for at least 16 hours to stabilize them. Then, using a pendulum impact testing machine verified by ISO 13802, test the initial impact strength of the untreated specimens at an impact velocity of 2.9 m / s and record the energy absorbed at fracture. To evaluate the performance retention rate, another set of identical specimens should be exposed to an aging chamber at 85℃ and 85% humidity for 200 hours, and then subjected to impact testing under the same conditions. The formula for calculating the performance retention rate is:

[0119] Retention rate (%) = (Average impact strength after treatment / Average initial impact strength) × 100

[0120] The unit of impact strength is kJ / m. 2 .

[0121] (2) Odor Test: PV3900-2000, used for evaluating the volatile odor of automotive interior materials and their components. The test requires that, under specific temperature and humidity conditions, such as 23°C and 50% RH, the sample is sealed in a dedicated odor evaluation container for a certain period of time. A trained and certified odor assessor then subjectively grades the odor intensity (6 levels: 1 = no odor → 6 = unbearable). The results are applicable to the environmental performance management of automotive supply chain materials such as plastics, adhesives, and fabrics.

[0122] (3) Weather resistance: SAE 2412-2015, accelerated aging test method for automotive interior parts (such as dashboards and door panels). A xenon lamp exposure device is used to simulate the outdoor solar spectrum (wavelength range 290-800nm), with strictly controlled irradiance intensity (0.55W / m²). 2 The material was subjected to accelerated aging irradiation of 488 KJ under conditions of @340nm, temperature (maximum 89℃), humidity (relative humidity 50%), and spray cycle.

[0123] Under standard environmental conditions (23±2℃, 50±10% relative humidity), a calibrated grayscale reference card (containing 20 gray levels, with a color difference value of ΔE*=1.0 per level) is placed alongside the test sample. Under a CIE C light source (simulated sunlight, color temperature 6774K) and a fixed observation angle of 45° / 0°, the Lab values ​​of the sample before and after aging are measured using an integrating sphere spectrophotometer. The grayscale change value ΔG is calculated using the formula: ΔG=[(ΔL)^2+(Δa*)^2+(Δb*)^2]^0.5 (ΔL* / Δa* / Δb are the color difference components before and after aging). At the same time, the linearity of the grayscale card needs to be verified using an unaged sample as a benchmark (L≥95 for level 0 pure white card, L*≤5 for level 19 pure black card). The final result is reported as the grayscale card level corresponding to the ΔG value (allowable deviation ±0.5 levels).

[0124] The preparation methods of the embodiments and comparative examples in this application are as follows:

[0125] The dried ABS resin, PC resin, composite odor inhibitor, compatibilizer, stabilizer, and other additives are mixed according to the formulations in Tables 1 and 2 and then added to the main barrel of a twin-screw extruder. The screw diameter is 35 mm, and the length-to-diameter ratio (L / D) is 48:1. The temperatures of each section of the main barrel from the feed port to the die outlet are controlled at 220℃, 230℃, 240℃, 245℃, and 240℃, respectively. The twin-screw speed is 400 rpm. After the extruded material is cooled in a water bath, it is pelletized to obtain the PC / ABS resin composition.

[0126] Table 1. Weight parts of each component and test results of the PC / ABS resin compositions in Examples 1-13

[0127]

[0128]

[0129] As can be seen from the data of the examples, the impact performance retention rate of the PC / ABS resin composition provided in the examples of the present invention is ≥68%, the odor level is ≤4.2, and the weather resistance is ≥4.

[0130] Examples 2 and 4-5 show that the melt index of PC resin has a certain degree of influence on the results.

[0131] Examples 2 and 8-11 show that the ratio of the compound odor inhibitors has a certain influence on the results.

[0132] Table 2. Weight parts of each component and test results of the PC / ABS resin compositions in Comparative Examples 1-4

[0133]

[0134]

[0135] As shown in Comparative Example 1, when only stabilizers are added and no compound odor inhibitors are added, the impact performance retention rate decreases, the odor level increases (the olfactory experience is worse), and the weather resistance decreases.

[0136] As shown in Comparative Example 2, without the addition of compatibilizer, the impact performance retention rate decreased most significantly, while the odor level increased (the smell was worse) and the weather resistance decreased.

[0137] As shown in Comparative Example 3, without the addition of stabilizers, only the addition of compound odor inhibitors resulted in the most significant decrease in weather resistance, a decrease in impact performance retention, and an increase in odor level (a worse olfactory experience).

[0138] As shown in Comparative Example 4, replacing benzotriazole UV absorbers with non-benzotriazole UV absorbers resulted in a decrease in impact performance retention, an increase in odor level (worse olfactory experience), and a decrease in weather resistance.

[0139] As demonstrated in the examples and comparative cases, the simultaneous addition of stabilizers and compound odor inhibitors can effectively maintain the mechanical properties and weather resistance of the PC / ABS resin composition while providing a better olfactory experience. Furthermore, the stabilizers and compound odor inhibitors have a synergistic effect, and their combined use yields better results than using either one alone.

Claims

1. A PC / ABS resin composition, characterized in that, By weight, it includes the following components: 49-91 parts of PC resin; 10-50 parts of ABS resin; 2-6 parts compatibilizer; Compound odor inhibitor 0.5-5 parts; Stabilizer 0.1-0.8 parts; Other auxiliary agents: 0-2 parts; The composite odor inhibitor is selected from at least one of a compound of metal-organic framework materials and cyclodextrin or a compound of metal-organic framework materials and allyl-β-cyclodextrin. In the compound of metal-organic framework materials and cyclodextrin, the mass ratio of metal-organic framework material to cyclodextrin, or in the compound of metal-organic framework materials and allyl-β-cyclodextrin, is (1-4):(1-4). The metal-organic framework material is selected from any one or more of the IRMOF series, ZIF series, PCN series, MIL series, and UiO series; The compatibilizer is selected from ABS grafted maleic anhydride; The stabilizer is selected from benzotriazole ultraviolet absorbers.

2. The PC / ABS resin composition according to claim 1, characterized in that, The residual styrene monomer content of the ABS resin is 0-100 ppm.

3. The PC / ABS resin composition according to claim 2, characterized in that, The residual styrene monomer content of the ABS resin is 0.01-75 ppm.

4. The PC / ABS resin composition according to claim 3, characterized in that, The residual styrene monomer content of the ABS resin is 0.02-50 ppm.

5. The PC / ABS resin composition according to claim 1, characterized in that, The metal-organic framework material is selected from any one or more of the ZIF series, MIL series, and UiO series.

6. The PC / ABS resin composition according to claim 1, characterized in that, The cyclodextrin is selected from any one or more of α-cyclodextrin, β-cyclodextrin, or γ-cyclodextrin.

7. The PC / ABS resin composition according to claim 1, characterized in that, In the compound of metal-organic framework materials and cyclodextrin, the mass ratio of metal-organic framework material to cyclodextrin, or in the compound of metal-organic framework materials and allyl-β-cyclodextrin, is (1-2):(1-2).

8. The PC / ABS resin composition according to claim 7, characterized in that, In a compound of metal-organic framework materials and cyclodextrin, the mass ratio of metal-organic framework material to cyclodextrin, or in a compound of metal-organic framework materials and allyl-β-cyclodextrin, is 1:(1-2).

9. The PC / ABS resin composition according to claim 1, characterized in that, The other additives are selected from any one or more of antioxidants, lubricants, release agents, heat stabilizers, or toughening agents.

10. A method for preparing a PC / ABS resin composition according to any one of claims 1-9, characterized in that, Mix all components evenly according to the formula, and then granulate by melt blending and extrusion.

11. The application of a PC / ABS resin composition according to any one of claims 1-9, characterized in that, Used to manufacture automotive parts and electronic device parts.

12. An automotive interior component, characterized in that, The automotive interior trim includes the PC / ABS resin composition according to any one of claims 1-9.

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