Polybutadiene latex and ABS resin, and methods for producing the same.

Abstract

This invention relates to polybutadiene latex and ABS resin, and methods for producing them. The polybutadiene latex has an average particle size of 290 to 315 nm, a number-average particle size distribution curve with a full width at half maximum of 20 to 150 nm, and the residual butadiene monomer content in the latex accounts for 0.005% to 1.6% of the total polybutadiene latex on a dry weight basis. The ABS resin contains 15 to 40 parts of ABS high rubber content powder and 60 to 78 parts of styrene-acrylonitrile copolymer. The ABS resin has a superior appearance of the electroplated surface and bonding strength of the plating layer.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymers, and particularly relates to polybutadiene latex and ABS resin, and methods for producing them.

Background Art

[0002] Compared to metal parts, electroplated plastic parts can achieve a better metallic texture and significantly reduce the weight of the parts, thereby effectively improving the appearance and decorative properties of the plastic material, as well as improving performance in terms of electrical, thermal, and corrosion resistance, and enhancing the mechanical strength of the surface. However, the selection of plastic materials for electroplating requires comprehensive consideration of factors such as material processing performance, mechanical properties, material cost, electroplating cost, electroplating difficulty, and dimensional accuracy. Among many polymer materials, ABS resin material has excellent overall performance due to its structural advantages, is easy to process and mold, and because the ABS surface is easily eroded by the electroplating solution, it can also achieve relatively high bonding strength of the plating layer, and therefore is currently widely used in the field of electroplating. Specifically, ABS resin refers to a blend of polybutadiene rubber, a graft copolymer of monomers styrene and acrylonitrile, and a matrix SAN resin, where A represents acrylonitrile, B represents butadiene, and S represents styrene. For electroplated ABS plastics, the content of each component of the material is extremely important, and among them, the butadiene content has a relatively large impact on electroplating. This is because, since ABS is a nonconductor, electroplating requires coating the surface of the material with a conductive layer. The formation of a conductive layer requires processes such as roughening, neutralization, sensitization, activation, and chemical plating. Among these, roughening is a process that improves the bonding strength of the plating layer by etching the butadiene through an oxidation reaction and forming an activated hydrophilic surface and anchor-like structure on the workpiece. Therefore, the higher the butadiene content, the higher the adhesion strength of the plating layer. In actual application processes, material designers significantly increase the butadiene rubber content and the particle size of the butadiene rubber solely to improve the adhesion strength of the plating layer. However, this makes the butadiene rubber more likely to aggregate in the ABS resin, and a large number of defects such as pinholes occur on the surface of injection-molded parts, significantly reducing the yield of electroplated parts.In particular, for automotive electroplated door handles, grilles, decorative strips, and other interior and exterior parts with extremely stringent usage requirements, defects such as pinholes can result in a yield of electroplated products below 50%, causing significant problems for automotive manufacturers and parts suppliers.

[0003] Chinese Patent CN114479300A discloses an electroplating-grade ABS resin composition comprising, by weight, 15 to 30 parts by weight of a polybutadiene rubber graft acrylonitrile and styrene copolymer, 60 to 80 parts of a matrix SAN resin, and 5 to 10 parts of a compatible SAN resin. The acrylonitrile content in the matrix SAN resin is 30 to 34 wt%, and the acrylonitrile content in the compatible SAN resin is 24 to 27 wt%. The addition of the compatible SAN resin improves the compatibility of the polybutadiene rubber in the matrix SAN resin, thereby causing the ABS to form a sharp-edged inverted boot structure during the electroplating roughening stage, providing tension for a larger plating layer, significantly reducing the occurrence of pinhole defects, and improving the pass rate of electroplated products. Chinese Patent CN104045963B discloses a glass fiber reinforced high-gloss ABS resin composition suitable for electroplating. This patent employs a low molecular weight SAN additive, which not only enhances the rigidity of the ABS resin composition but also effectively provides fluidity. This reduces the exposure of glass fibers and makes the surface of injection molded products appear higher gloss, thereby effectively reducing the linear thermal expansion coefficient of plastic electroplated products and effectively reducing plating leaks and pinholes due to glass fiber exposure. Chinese Patent CN112489635A discloses a transparent PC / ABS alloy and a method for producing the same. In this invention, ABS resin and styrene-grafted butadiene rubber are first mixed and extruded, and a compatibilizer is used to encase the rubber phase in the ABS with the styrene phase to prevent rubber aggregation. A transparent ABS masterbatch with a refractive index close to that of PC is produced by a two-step method, and then the masterbatch and PC resin are co-extruded and granulated, thereby producing a transparent PC / ABS alloy. While the above technical solutions can reduce the possibility of pinhole formation to some extent, they all involve forcibly dispersing the rubber by introducing a third component or compatibilizer at the subsequent modification level, and therefore cannot fundamentally solve the thermodynamic tendency of rubber to spontaneously aggregate. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Chinese Patent Application Publication No. 114479300 Specification [Patent Document 2] Chinese Patent No. 104045963 Specification [Overview of the project] [Problems that the invention aims to solve]

[0005] The technical problem that this invention aims to solve is to provide polybutadiene latex and ABS resin, as well as methods for producing them, thereby overcoming the drawback in the conventional electroplating process of ABS resin, which is prone to generating a large number of pinholes. [Means for solving the problem]

[0006] The present invention provides a polybutadiene latex having an average particle size of 290 to 315 nm, a number-average particle size distribution curve with a full width at half maximum of 20 to 150 nm, and a residual butadiene monomer content in the polybutadiene latex accounting for 0.005% to 1.6% of the total polybutadiene latex on a dry weight basis.

[0007] The percentage of residual butadiene monomer content mentioned above was obtained by quantification using an external standard method by gas chromatography. Specifically, 0.1 to 0.5 g of the sample was weighed, standardized to 0.1 mg, and placed in a headspace vial. The headspace vial containing the sample was then placed in a headspace autosampler, and the integrated area of ​​the gas chromatography spectrum of residual butadiene in the latex was measured using a nonpolar chromatography column (PC-1) and an FID detector. The amount of residual butadiene was obtained by converting it based on a standard curve, and the percentage of residual butadiene monomer content was obtained by dividing this value by the total dry weight of the polybutadiene latex.

[0008] The average particle size of the polybutadiene latex in this invention being 290-315 nm may be understood to include, but not be limited to, 290 nm, 295 nm, 298 nm, 300 nm, 302 nm, 303 nm, 305 nm, 308 nm, 310 nm, 312 nm, and 315 nm.

[0009] In this invention, the half-width of the number-average particle size distribution curve is 20 to 150 nm, which means 20 nm, 22 nm, 25 nm, 28 nm, 30 nm, 33 nm, 35 nm, 40 nm, 42 nm, 45 nm, 50 nm, 53 nm, 55 nm, 58 nm, 60 nm, 63 nm, 65 nm, 70 nm, 72 nm, 75 nm, 78 nm, 80 nm, 83 nm, 85 nm, 88 nm, 90 nm This includes, but may be understood to mean, 92nm, 95nm, 98nm, 100nm, 103nm, 105nm, 107nm, 110nm, 113nm, 115nm, 117nm, 120nm, 123nm, 125nm, 128nm, 130nm, 133nm, 135nm, 138nm, 140nm, 142nm, 145nm, 148nm, and 150nm.

[0010] In this invention, the residual butadiene monomer content in the polybutadiene latex accounts for 0.005% to 1.6% of the total polybutadiene latex on a dry weight basis, which corresponds to 0.005%, 0.008%, 0.01%, 0.012%, 0.015%, 0.018%, 0.021%, 0.025%, 0.028%, 0.030%, 0.032%, 0.035%, 0.038%, 0.040%, 0.045%, 0.050%, 0.055%, 0.060%, 0. This may be understood to include, but not limited to, 0.065%, 0.070%, 0.075%, 0.08%, 0.085%, 0.090%, 0.095%, 0.1%, 0.15%, 0.2%, 0.25%, 0.30%, 0.35%, 0.40%, 0.45%, 0.50%, 0.55%, 0.60%, 0.65%, 0.70%, 0.75%, 0.80%, 0.85%, 0.90%, 0.95%, 1.0%, 1.2%, 1.3%, 1.5%, and 1.6%.

[0011] Preferably, the polybutadiene latex has an average particle size of 300 to 310 nm and a number-average particle size distribution curve with a full width at half maximum of 30 to 100 nm.

[0012] Preferably, the residual butadiene monomer content in the polybutadiene latex accounts for 0.01% to 0.8% of the total polybutadiene latex on a dry weight basis.

[0013] Preferably, the weight fraction of the polybutadiene latex gel is 50-95%. By controlling the gel content within a reasonable range, excellent dispersion performance is consistently maintained during the subsequent polymerization and mixing processes, and the occurrence of electroplating defects due to rubber aggregation is more effectively avoided. The test standard for gel content is "Measurement of Gel Content of Synthetic Raw Rubber," and the standard numbers are SH / T1050-1991.

[0014] The present invention further provides a method for producing polybutadiene latex, and the method for producing polybutadiene latex is: The raw materials are mixed and subjected to a polymerization reaction to obtain polybutadiene latex, wherein the raw materials consist of 95-115 parts by weight of butadiene, 0.02-6 parts of initiator, 0.02-10 parts of electrolyte, 0.1-12 parts of emulsifier, 0.01-6 parts of chain transfer agent, 0.02-8 parts of rubber particle size regulator, 0-6 parts of gel content adjuster, and 40-400 parts of water, and the rubber particle size regulator is polyoxyethylene carboxylic acid ester.

[0015] Preferably, the initiator comprises one or more of sodium persulfate, potassium persulfate, ammonium persulfate, and azobisisobutylnitrile.

[0016] Preferably, the electrolyte comprises one or more of sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, and potassium hydroxide.

[0017] Preferably, the emulsifier includes one or more of sodium naphthalene sulfonate formaldehyde condensate, potassium naphthalene sulfonate formaldehyde condensate, potassium oleate, potassium stearate, potassium disproportionated rosin acid, sodium dodecyl benzene sulfonate, and sodium dodecyl sulfonate.

[0018] Preferably, the chain transfer agent includes one or more of tert-dodecyl mercaptan, n-dodecyl mercaptan, tetradecyl mercaptan, tridecyl mercaptan, undecyl mercaptan, and decyl mercaptan.

[0019] Preferably, the raw materials are, in parts by weight, 98 to 110 parts of butadiene, 0.12 to 5 parts of initiator, 0.05 to 6 parts of electrolyte, 1 to 8 parts of emulsifier, 0.1 to 4 parts of chain transfer agent, 0.05 to 5 parts of rubber particle size controller, 0.2 to 5 parts of gel content regulator, and 50 to 300 parts of water.

[0020] Preferably, the structural formula of the rubber particle size controller is RCOO(CH2CH2O) m mH, where R is a long-chain alkyl group, the number of carbon atoms of the long-chain alkyl group is 4 to 19, m is 4 to 11, more preferably, the number of carbon atoms of the long-chain alkyl group is 5 to 12, and m is 4 to 8.

[0021] Preferably, the gel content regulator is a dialkyldithioperoxydicarbonate ester, and the number of carbon atoms of the alkyl group is 1 to 13, more preferably, the number of carbon atoms of the alkyl group is 1 to 10.

[0022] Preferably, the polymerization reaction is to raise the temperature to 55 to 85 °C and react for 23 to 38 hours.

[0023] The present invention further provides an ABS high rubber content powder, and the ABS high rubber content powder is a copolymer of the above polybutadiene latex, styrene, and acrylonitrile.

[0024] Preferably, the weight fraction of the polybutadiene latex is 50 to 70%, and the weight fraction of acrylonitrile is 4 to 20%. More preferably, the weight fraction of the polybutadiene latex is 52 to 66%, and the weight fraction of acrylonitrile is 6 to 15%.

[0025] The present invention further provides an ABS resin. The ABS resin components are in parts by weight and include 15 to 40 parts of the above ABS high rubber content powder and 60 to 78 parts of a styrene-acrylonitrile copolymer.

[0026] The present invention further provides a method for manufacturing an ABS resin. The method for manufacturing the ABS resin includes mixing each component, extruding with a twin-screw extruder, and then cooling and pelletizing to obtain an ABS resin.

[0027] The present invention further provides the use of the ABS resin in interior and exterior electroplated members for automobiles, for example, it is used in door handles of front doors and rear doors, front grilles, interior decorative strips, outer frames of navigation panels, etc.

[0028] The average particle size of the polybutadiene latex according to the present invention is controlled to 290-315 nm, and the full width at half maximum of the number-average particle size distribution curve is 20-150 nm. Due to the extremely narrow particle size distribution, the butadiene rubber in the latex exhibits almost monodisperse properties. This property differs significantly from the particle size distribution of butadiene rubber obtained by conventional polymerization methods. The closer the particle size is to the average particle size, the greater the number of rubber particles, and the further it is from the average particle size, the closer the number of rubber particles approaches zero. Butadiene latex with these properties exhibits excellent stability in subsequent grafting and aggregation processes. In particular, with respect to the grafting rate, a uniform grafting rate ensures that each rubber can be grafted and coated well, thereby avoiding aggregation between rubbers, reducing the possibility of pinholes occurring in the ABS resin during the electroplating process, and the uniform dispersion of rubber contributes to improved bonding strength of the plating layer, thus avoiding defects such as plating leaks. On the other hand, the residual butadiene monomer content in the polybutadiene latex accounts for 0.005% to 1.6% of the total polybutadiene latex on a dry weight basis. Since the residual butadiene monomer readily reacts with the graft monomers styrene and acrylonitrile, an appropriate residual butadiene monomer content can affect the occupancy rate of butadiene units in the graft chain segments of the graft rubber. This improves the compatibility between the graft rubber and the blended SAN resin, enhances the dispersibility of the rubber, and further reduces the possibility of appearance pinholes occurring in electroplated parts. [Effects of the Invention]

[0029] The polybutadiene latex used in this invention imparts superior appearance of the electroplated surface and better bonding strength of the plating layer to the ABS resin.

[0030] The pinhole grade of the surface of the ABS resin according to the present invention is 3A to 5A, and the adhesion strength of the plating layer is 0.62 to 1.28 kgf / cm. [Modes for carrying out the invention]

[0031] The present invention will be further described below with reference to specific examples. It should be understood that these examples are for illustrative purposes only and not to limit the scope of the present invention. Furthermore, it should be understood that, after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms are also within the scope defined by the claims attached to this application.

[0032] Reagent supplier: Butadiene: Industrial-grade butadiene, purity exceeding 96%, Hua Rui Initiator: Potassium persulfate, commercially available Electrolytes: Sodium bicarbonate, commercially available Emulsifier: Sodium dodecylbenzenesulfonate, commercially available product Chain transfer agent: n-dodecyl mercaptan, commercially available Rubber particle size control agent 1: Polyoxyethylene hexanoic acid ester, C5H 11 COO(CH2CH2O)6H, manufactured by CIHEEM, USA, LMEO-6 Rubber particle size control agent 2: Polyoxyethylene laurate ester, C 11 H 23 COO(CH2CH2O)6H, manufactured by CIHEEM, USA, LMEO-12 Rubber particle size control agent 3: Polyoxyethylene stearate, C 17 H 35 COO(CH2CH2O)9H, manufactured by CIHEEM, USA, LMEO-18 Gel content modifier 1: Dithiodi-n-butylxanthogenic acid ester, CP8, manufactured by Zhengzhou Acme Chemical Co., Ltd. Gel content modifier 2: Dithiodiisopropyl xanthogenic acid ester, DIP, manufactured by Shanghai Yuanye Biotechnology Co., Ltd. Gel content modifier 3: Didodecyl dithiooxantogenic acid ester, DP, manufactured by Hubei Xinkang Pharmaceutical & Chemical Co., Ltd. Chemical Research Institute. Styrene: Purchased from Aladdin Reagents Co., Ltd., purity 99% or higher. Acrylonitrile: Purchased from Aladdin Reagents Co., Ltd., purity 99% or higher. Styrene-acrylonitrile copolymer: PN-118, manufactured by Chi Mei Co., Ltd., Taiwan. Unless otherwise specified, certain components (e.g., initiators, electrolytes) in the parallel examples and comparative examples of the present invention were all the same commercially available products.

[0033] The method for producing polybutadiene latex is: The process involves mixing each component according to the mixing ratios shown in Tables 1 and 2, then raising the temperature to 55°C to initiate the polymerization reaction, continuously raising the temperature to 85°C within 30 hours, and terminating the reaction after 32 hours to obtain polybutadiene latex.

[0034] Performance testing of polybutadiene latex:

[0035] (1) Evaluation of particle size and testing of particle size distribution: Using a Malvern laser diffraction particle size analyzer (model: Mastersizer 3000E), the average particle size and particle size distribution of polybutadiene latex were analyzed, and a number-average particle size distribution curve was created, and the full width at half maximum was measured.

[0036] (2) Gel content (weight fraction) test: This test was performed in accordance with the test standards for "Measurement of gel content of synthetic raw rubber," and the standard number was SH / T1050~1991.

[0037] (3) Residual butadiene content: After drying the latex, it was placed in a headspace vial, dissolved with N,N-dimethylformamide, and the target component was heated to gas-liquid equilibrium. Then, the headspace was quantitatively aspirated and gas chromatography was performed. Qualitative analysis was performed based on the retention time, and quantification was performed using the internal standard method with n-pentane as the internal standard. The peak that appeared at 2.25 to 2.50 min was the residual butadiene substance. A Shimadzu GC-MS-QP2010 gas chromatograph was used. The chromatography column was an RTX-WAX quartz capillary column (30 m × 0.25 mm × 0.5 μm), the column temperature was maintained at 80°C for 12 min, then the temperature was increased to 120°C at 10°C / min and maintained for 10 min, the inlet temperature was set to 220°C, and the detector temperature was set to 250°C.

[0038] ABS high rubber content powder: This is a copolymer of polybutadiene latex, styrene, and acrylonitrile, and its manufacturing method is as follows: Polybutadiene latex, styrene, and acrylonitrile are added according to the mixing ratios in Table 3. Polybutadiene latex is added to the reaction vessel, and 0.015 parts of ferrous sulfate are added to the reaction vessel and stirred uniformly. The reaction vessel is heated to 67°C, and 2.51 parts of cumene hydroperoxide, acrylonitrile, styrene, 1.5 parts of tert-dodecyl mercaptan, 5 parts of sodium dodecyl sulfonate, and 175 parts of deionized water are added dropwise continuously for 2 hours. After heating is complete, the reaction is continued for another 5 hours to obtain graft latex. 1000 parts of graft latex were added to the agglomeration reaction vessel, stirring was started and the vessel was heated to 75°C, 450 parts of 5% sulfuric acid were gradually added, the addition completed within 2 hours, the temperature was then raised to 91°C and maintained at that temperature for 3 hours, the obtained agglomerated latex was filtered through a 325-mesh filter, and dried in a fluidized bed dryer at 60°C for 6 hours to obtain an ABS high-rubber content powder with a moisture content of <1%, and the ABS high-rubber content powders produced in Examples 11-20, Comparative Examples 4-6, and Examples 21-22 were... These were designated as ABS high rubber content powder 1, ABS high rubber content powder 2, ABS high rubber content powder 3, ABS high rubber content powder 4, ABS high rubber content powder 5, ABS high rubber content powder 6, ABS high rubber content powder 7, ABS high rubber content powder 8, ABS high rubber content powder 9, ABS high rubber content powder 10, ABS high rubber content powder 11, ABS high rubber content powder 12, ABS high rubber content powder 13, ABS high rubber content powder 14, and ABS high rubber content powder 15, respectively.

[0039] ABS resin manufacturing method: According to Tables 4-6, the components were mixed, extruded using a twin-screw extruder, and then cooled and granulated to obtain ABS resin. The extrusion temperature was 185-220°C, the screw rotation speed was 300 r / min, and the ratio of screw length to diameter was 25:1.

[0040] Performance testing of ABS resin:

[0041] (1) Testing for pinholes on the ABS surface: ABS resin was injection molded into a standard square plate (100mm*100mm*2mm), and pinholes on the square plate were statistically measured using a Leica optical microscope (model: DM6 M LIBS). Three pinholes were tested for each sample, the average was calculated, and the samples were further divided into grades: 5A (0 pinholes), 4A (1-2 pinholes), 3A (3-5 pinholes), 2A (6-10 pinholes), and 1A (more than 10 pinholes).

[0042] (2) Adhesion of the plating layer: The adhesion of the plating layer was tested according to ASTM B533(85)-2013 Peel strength of alloy electroplated plastics. Five samples were tested for each sample, and the average adhesion strength was calculated.

[0043] (3) Standard deviation of graft rate: After drying the ABS high rubber content powder, weigh approximately 1.000 g and record this as m0. Weigh the mass of the reagent bottle and record this as m1. Place the high rubber content powder into the reagent bottle, add approximately 25 ml of acetone, shake for 2 hours to thoroughly dissolve the high rubber content powder, place in a high-speed centrifuge and centrifuge for 30 minutes, setting the centrifuge speed to 15,000 revolutions / minute. After centrifugation, carefully remove the acetone solution, making sure that no powder comes out of the bottom, replenish with approximately 25 ml of acetone, shake to thoroughly mix the solution, centrifuge again, remove the acetone solution after centrifugation, and dry the reagent bottle containing the insoluble material in an oven at 80°C for 8 hours, then continue drying in a vacuum oven at 80°C for 4 hours, then cool to room temperature and weigh, which is recorded as m2. The graft rate is given by (m2-m1-m0*n) / (m0*n), where m0 is the mass of the ABS high-rubber content powder (in g), m1 is the weight of the reagent bottle (in g), m2 is the total mass of the reagent bottle and separated material after drying (in g), and n is the rubber content in the ABS high-rubber content powder, which is the loading ratio of the dried butadiene latex in Table 3 (polybutadiene latex weight / (polybutadiene latex weight + styrene weight + acrylonitrile weight)). The method for calculating the standard deviation of the graft rate is as follows: Samples are taken from the same ABS high-rubber content powder sample in 10 separate steps, and the graft rate is measured. First, the average of the 10 measurements is subtracted from each measured value to obtain 10 data points. Next, the squares of the 10 data points obtained in the previous step are summed, and the sum is divided by 10. Finally, the square root is calculated to obtain the standard deviation of the graft rate. A smaller standard deviation in the graft rate indicates a more stable graft rate.

[0044] [Table 1]

[0045] [Table 2]

[0046] [Table 3]

[0047] [Table 4]

[0048] [Table 5]

[0049] [Table 6]

[0050] As can be seen from Tables 4-6, the average particle size and number-average particle size distribution curve of the polybutadiene latex used are within the range of the present invention, thereby the ABS resin has a superior appearance of the electroplated surface and bonding strength of the plating layer, improving the electroplating yield.

Claims

1. Polybutadiene latex, The polybutadiene latex is characterized in that it has an average particle size of 290 to 315 nm, a half-width of the number-average particle size distribution curve of 20 to 150 nm, and the residual butadiene monomer content in the polybutadiene latex accounts for 0.005% to 1.6% of the total polybutadiene latex on a dry weight basis.

2. The polybutadiene latex according to claim 1, characterized in that the polybutadiene latex has an average particle size of 300 to 310 nm, a number-average particle size distribution curve with a full width at half maximum of 30 to 100 nm, and the residual butadiene monomer content in the polybutadiene latex accounts for 0.01% to 0.8% of the total polybutadiene latex on a dry weight basis.

3. The polybutadiene latex according to claim 1, characterized in that the weight fraction of the polybutadiene latex gel is 50 to 95%.

4. A method for producing polybutadiene latex according to any one of claims 1 to 3, The raw materials are mixed and a polymerization reaction is carried out to obtain polybutadiene latex, where the raw materials consist of 95 to 115 parts by weight of butadiene, 0.02 to 6 parts of initiator, 0.02 to 10 parts of electrolyte, 0.1 to 12 parts of emulsifier, 0.01 to 6 parts of chain transfer agent, 0.02 to 8 parts of rubber particle size regulator, 0 to 6 parts of gel content adjuster, and 40 to 400 parts of water, with the rubber particle size regulator being polyoxyethylene carboxylic acid ester. A manufacturing method that includes the following.

5. The initiator comprises one or more of sodium persulfate, potassium persulfate, ammonium persulfate, and azobisisobutylnitrile. The electrolyte includes one or more of sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, and potassium hydroxide. The emulsifier includes one or more of the following: naphthalene sulfonate formaldehyde condensate sodium salt, naphthalene sulfonate formaldehyde condensate potassium salt, potassium oleate, potassium stearate, disproportionated rosinate potassium, sodium dodecylbenzenesulfonate, and sodium dodecylsulfonate. The manufacturing method according to claim 4, characterized in that

6. The chain transfer agent comprises one or more of tert-dodecyl mercaptan, n-dodecyl mercaptan, tetradecyl mercaptan, tridecyl mercaptan, undecyl mercaptan, and decyl mercaptan. The structural formula for the rubber particle size control agent is RCOO(CH ２ CH ２ O) ｍ H is a long-chain alkyl group, where R is a long-chain alkyl group with 4 to 19 carbon atoms, m is 4 to 11, and the gel content adjusting agent is a dialkyldithiooxantogenic acid ester, where the alkyl group has 1 to 13 carbon atoms. The manufacturing method according to claim 4, characterized in that

7. The aforementioned raw materials consist of 98 to 110 parts by weight of butadiene, 0.12 to 5 parts of initiator, 0.05 to 6 parts of electrolyte, 1 to 8 parts of emulsifier, 0.1 to 4 parts of chain transfer agent, 0.05 to 5 parts of rubber particle size control agent, 0.2 to 5 parts of gel content adjuster, and 50 to 300 parts of water. The manufacturing method according to claim 4, characterized in that

8. The polymerization reaction includes raising the temperature to 55 to 85°C and reacting for 23 to 38 hours. The manufacturing method according to claim 4, characterized in that

9. ABS high rubber content powder, The ABS high rubber content powder is a copolymer of polybutadiene latex, styrene, and acrylonitrile as described in any one of claims 1 to 3. A high-rubber content ABS powder characterized by the above.

10. The ABS high-rubber content powder according to claim 9, characterized in that the weight fraction of the polybutadiene latex is 50 to 70% and the weight fraction of acrylonitrile is 4 to 20%.

11. It is made of ABS resin, The ABS resin component comprises, by weight, 15 to 40 parts of the ABS high rubber content powder described in claim 9 and 60 to 78 parts of the styrene-acrylonitrile copolymer. ABS resin characterized by the following features.

12. A method for producing ABS resin according to claim 11, The components are mixed, extruded using a twin-screw extruder, then cooled and granulated to obtain ABS resin. A manufacturing method that includes the following.

13. Use of ABS resin in an electroplated interior / exterior component for automobiles, as described in claim 11.

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