CN114891333B - PC/ABS composite material and preparation method and application thereof - Google Patents
PC/ABS composite material and preparation method and application thereof Download PDFInfo
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- CN114891333B CN114891333B CN202210316918.1A CN202210316918A CN114891333B CN 114891333 B CN114891333 B CN 114891333B CN 202210316918 A CN202210316918 A CN 202210316918A CN 114891333 B CN114891333 B CN 114891333B
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- 229920007019 PC/ABS Polymers 0.000 title claims abstract description 23
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 17
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 15
- 239000004611 light stabiliser Substances 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 6
- 239000000155 melt Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 7
- 239000003963 antioxidant agent Substances 0.000 claims description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 239000012964 benzotriazole Substances 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 229920000459 Nitrile rubber Polymers 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 claims 1
- 239000002671 adjuvant Substances 0.000 claims 1
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 18
- 239000000463 material Substances 0.000 description 15
- 238000012360 testing method Methods 0.000 description 8
- 230000032683 aging Effects 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 229910052724 xenon Inorganic materials 0.000 description 7
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 239000004417 polycarbonate Substances 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- TXQVDVNAKHFQPP-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)CO TXQVDVNAKHFQPP-UHFFFAOYSA-N 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002530 phenolic antioxidant Substances 0.000 description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OLFNXLXEGXRUOI-UHFFFAOYSA-N 2-(benzotriazol-2-yl)-4,6-bis(2-phenylpropan-2-yl)phenol Chemical compound C=1C(N2N=C3C=CC=CC3=N2)=C(O)C(C(C)(C)C=2C=CC=CC=2)=CC=1C(C)(C)C1=CC=CC=C1 OLFNXLXEGXRUOI-UHFFFAOYSA-N 0.000 description 1
- FMRHJJZUHUTGKE-UHFFFAOYSA-N Ethylhexyl salicylate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1O FMRHJJZUHUTGKE-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- YIMQCDZDWXUDCA-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1CCC(CO)CC1 YIMQCDZDWXUDCA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010813 internal standard method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- -1 polyethylene terephthalate-1, 4-cyclohexanedimethanol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a PC/ABS composite material, a preparation method and application thereof, wherein the PC/ABS composite material comprises the following components in parts by weight: 50-60 parts of PC resin; 13.5-37 parts of ABS resin; 3-6 parts of compatilizer; 3-10 parts of PCTG resin; 3-15 parts of titanium dioxide; 0.5-1 part of light stabilizer; the titanium dioxide is rutile titanium dioxide. The PC/ABS composite material provided by the invention has the characteristics of high light reflection, low emission and the like.
Description
Technical Field
The invention relates to the technical field of engineering plastics, in particular to the field of polycarbonate composite materials, and specifically relates to a PC/ABS composite material, a preparation method and application thereof.
Background
Since the light-reflecting members of precision instruments, such as reflectors of automobile lamps, reflect light from a light source by means of the light-reflecting members, there is a high demand for optical functions of raw materials for manufacturing the light-reflecting members, and a sufficiently high light-reflecting property, i.e., a high light-reflecting function, is required.
In addition, with the emphasis on air quality, higher emission requirements are also put forward on materials, and in many cases, the car lamp reflector works in a closed environment, if the emission is poor, small molecular substances volatilize under the influence of factors such as heating of a light source, so that the haze is increased, the reflectivity is reduced, and the reflection effect is affected. Thus, it is necessary to develop a material having both high light reflection and low emission properties.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a PC/ABS composite material and a preparation method thereof. The PC/ABS composite material provided by the invention has the innovation points of high light reflection and low emission.
The method is realized by the following technical scheme:
the PC/ABS composite material comprises the following components in parts by weight:
the PCTG material is a product of transesterification polycondensation of three monomers, terephthalic acid (PTA), ethylene Glycol (EG) and 1, 4-Cyclohexanedimethanol (CHDM). The PCTG material has light transmittance higher than 90%, haze lower than 1% and crystal luster. The PCTG has high light transmittance and high glossiness, and the glossiness is higher in a system filled with PC/ABS/PCTG by titanium dioxide, so that the PCTG has high light reflectance.
The titanium dioxide is rutile titanium dioxide. On the one hand, the rutile titanium dioxide has the function of shading, and in addition, the crystal lattice of the rutile titanium dioxide is stable, the negative influence on PC is low, the degradation degree on PC is low, the VOC content is controlled, and the material emission is inhibited. The particle size of the rutile type titanium dioxide is 0.2-0.5 mu m, the particle size of the rutile type titanium dioxide can influence the light reflecting effect of the material, the particle size is larger than 0.5 mu m, and the light reflecting effect is poor. The anatase titanium dioxide has larger lattice space, relatively unstable, poor weather resistance, easy yellowing and easy chalking.
Further, the residual monomer amount of the ABS resin is less than or equal to 400ppm, the testing method refers to GB/T16867 and GB/T8861 standards, the ABS resin is dissolved by adopting N, N-dimethylformamide as a solvent through a gas chromatography method, and the content of the residual monomer in the ABS plastic is quantitatively measured through an internal standard method. The residual quantity of the ABS resin has an influence on VOC, the control of the residual quantity is favorable for reducing VOC and achieving the effect of low emission, in addition, the residual quantity is less, the smell is low, meanwhile, the small molecules are less, the surface appearance of the product is good, no pits exist, and the high reflection is further contributed.
Further, the compatilizer is one or more of styrene, nitrile rubber and maleic anhydride multipolymer.
Further, the melt index of the PC resin is 9-11g/10min, and the melt index is measured according to GB/T3682-2018 standard under the conditions of 300 ℃ and 1.2 kg.
Further, the ABS resin is high-flow ABS resin, the melt index of the ABS resin is 20-30g/10min, and the melt index is measured according to GB/T3682-2018 standard under the conditions of 220 ℃ and 10 kg.
Further, the light stabilizer may be a benzotriazole-based light stabilizer and/or a hindered amine-type ultraviolet absorber.
Further, 0.1 to 1 part of an auxiliary agent is included, including but not limited to an antioxidant or lubricant.
The antioxidants include, but are not limited to, one or more of hindered phenolic antioxidants or phosphite antioxidants.
The lubricant may be pentaerythritol stearate based.
The invention also provides a preparation method of the PC/ABS composite material, which comprises the following steps:
s1, weighing the components according to the proportion, and premixing to obtain a premix;
s2: and (3) putting the premix in the step (S1) into an extruder, carrying out melt blending, extruding and granulating to obtain the PC/ABS composite material.
Further, the extruder is a twin screw extruder having a screw aspect ratio of (40-48): 1, the technological conditions of the double-screw extruder are as follows: the temperature of the first area is 120-140 ℃, the temperature of the second area is 140-180 ℃, the temperature of the third area is 200-230 ℃, the temperature of the fourth area is 250-260 ℃, the temperature of the fifth area is 250-260 ℃, the temperature of the sixth area is 250-260 ℃, the temperature of the seventh area is 250-260 ℃, the temperature of the eighth area is 250-260 ℃, the temperature of the ninth area is 250-260 ℃, the temperature of the machine head is 250-260 ℃, the rotating speed of the machine head is 450 r/min, the current of the machine head is 60-70%, the vacuum negative pressure is-0.075 to-0.08 MPa, the melt pressure is 8-10MPa, and the melt pressure of the machine head is tested by a sensor in the extrusion process.
The invention also provides application of the PC/ABS composite material in preparing reflective parts, such as parts for preparing car lamp reflectors and the like.
Compared with the prior art, the invention has the beneficial effects that:
the proportion of the rutile titanium dioxide is increased, the light transmittance of the system can be reduced, and the shading performance is improved, but the impact resistance of the material is obviously reduced due to the excessive addition of the rutile titanium dioxide. The addition of PCTG can effectively reduce the melt pressure, so that the distribution of the rutile titanium dioxide in the polymer is more uniform, in addition, the PCTG has high glossiness, and the reflective effect can be improved after the addition, so that the addition amount of the rutile titanium dioxide can be reduced, and the appearance, the strength, the optical performance and the like of the product can meet the requirements.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
< preparation of examples and comparative examples >
The raw materials used in the examples and comparative examples of the present invention are all commercially available, but are not limited to these materials:
PC resin: the melt index is 10g/10min, and the brand PC A2200 is purchased from Taiwan China;
ABS resin A: the melt index was 28g/10min, the sum of the residual monomers was 200ppm, the brand ABS 8364, purchased from Shanghai Gao Qiao;
ABS resin B: the melt index is 20g/10min, the sum of residual monomers is 600ppm, and the brand ABS PA-757K is purchased from Zhenjiang Qimei;
ABS resin C: the melt index was 26g/10min, the sum of the residual monomers was 180ppm, the brand ABS 8391, purchased from Shanghai Gao Qiao;
and (3) a compatilizer: maleic anhydride grafted ABS, brand HW-102M, available from jiaxing Hua;
PCTG resin: polyethylene terephthalate-1, 4-cyclohexanedimethanol ester, grade PCTG MX711, from Islaman;
rutile type titanium dioxide A: the average particle size is 0.2-0.3 mu m, brand titanium dioxide 2233, purchased from Kang Nuosi;
rutile type titanium dioxide B: the average grain diameter is 0.4-0.5 μm, and the brand is TR-33, purchased from Jiangxi Tianguang;
rutile type titanium dioxide C: the average particle size is 0.55 mu m, and the mark is R-915, which is purchased from the titanium industry;
anatase titanium dioxide: the average particle diameter is 0.2-0.4 mu m, and the mark A-100 is purchased from Hebei Masen titanium dioxide Limited;
light stabilizer A: benzotriazole light stabilizer, brand number TINUVIN 234, available from basf;
light stabilizer B: hindered amine light stabilizers, under the designation Uvinul 5050H, are available from Basoff.
An antioxidant: mixtures of hindered phenolic antioxidants and phosphite antioxidants are commercially available and the same commercially available product was used in parallel experiments;
and (3) a lubricant: pentaerythritol stearate, commercially available, and the same commercially available product was used in parallel experiments.
The preparation methods of the examples and comparative examples of the present invention are as follows:
s1, weighing the components according to the proportion in the table, and premixing to obtain a premix;
s2: and (3) putting the premix in the step (S1) into a double-screw extruder, carrying out melt blending, extruding and granulating to obtain the PC/ABS composite material.
The twin-screw extruder had a screw aspect ratio of 48:1, the technological conditions of the double-screw extruder are as follows: the temperature of the first area is 130 ℃, the temperature of the second area is 150 ℃, the temperature of the third area is 210 ℃, the temperature of the fourth area is 250 ℃, the temperature of the fifth area is 250 ℃, the temperature of the sixth area is 250 ℃, the temperature of the seventh area is 250 ℃, the temperature of the eighth area is 250 ℃, the temperature of the ninth area is 250 ℃, the temperature of the machine head is 250 ℃, the rotating speed of the machine head is 450 revolutions per minute, the vacuum negative pressure is-0.075 to-0.08 MPa, the melt pressure is 8-10MPa, and the melt pressure of the machine head is tested by a sensor in the extrusion process.
In the present specification, "parts" means "parts by weight" unless specifically stated otherwise.
< test Standard >
The performance test criteria for each of the examples and comparative examples of the present invention are as follows:
charpy impact Strength: according to GB/T1043.2-2008 test, the length of the spline is 80mm, the width is 10mm, the thickness is 4mm, and the notch type A is formed;
gloss level: test standard according to GB/T8807-1988, 60 degree angle;
light transmittance test standard: tested according to GB/T2410-2008 and ISO 13468-1-2019;
sporadic properties: the odor was tested by the VDA270-1992 method, the fogging was in accordance with DIN 75201-2011 and the VOC was tested in accordance with VDA 278-2011.
Appearance: the material is molded into a sample plate, the appearance of the sample plate is observed, and whether the defects such as material flowers, pits and the like exist or not is judged, wherein the sample plate is classified into 1-5 grades, the 1 grade is worst, the surface roughness is more, or the material flowers are serious; grade 5 is best, and the surface is flat.
Xenon lamp aging: the PV1303 method was used to test 5 cycles (280 KJ/square meter per cycle) and the color difference data was measured using a color difference meter.
Xenon lamp ageing grey scale: the test results, which are in accordance with DIN EN 20105-A2 standard, show that the higher the rating value, the better the ageing grey scale of the xenon lamp.
The ageing test of the xenon lamp shows long-term weather resistance, and if the ageing performance of the xenon lamp is not satisfied, the material is easy to change color for a long time, and then the reflection performance of the material is affected.
Table 1. Example formulation (parts by weight)
TABLE 2 Performance test results of the examples
Table 3. Comparative example formulation (weight parts)
TABLE 4 Performance test results of comparative examples
From the thermodynamic point of view, rutile is the relatively most stable crystalline form with a melting point of 1870 ℃; anatase is the low temperature phase of titanium dioxide, has poorer purity and VOC than rutile, and is generally converted into rutile at 500-600 ℃. The nature of the titanium dioxide crystal form transformation is the structural rearrangement of the unit octahedra constituting the unit cell structure. The rutile crystal structure has denser atomic arrangement, higher density, hardness and dielectric constant and larger scattering of light.
By combining the data, as can be seen from examples 1-4, the proportion of the rutile titanium dioxide is increased, so that the light transmittance of the system can be reduced, and the light reflection performance can be improved; in example 3, it can be seen that the addition of PCTG allows the appearance and properties of the product to be satisfactory as compared with comparative example 2. Comparative example 1 compared with example 2, since PCTG and titanium pigment were not added, the material was high in light transmittance and poor in xenon lamp aging level; comparative example 2 resulted in a clear bloom, pock and high degree of fogging in appearance compared to examples 1-4 due to the absence of PCTG. Comparative example 3 compared with example 1, the titanium dioxide powder of comparative example 3 has larger particle size, so that the impact property and appearance of the material are poor; comparative example 4 has a large number of ABS residues, which results in deterioration of odor, fogging, and VOC, as compared with example 1. Examples 2 and 5 of the present invention are good data and are core data of the present invention. Comparative example 5 compared with example 1, the excessive amount of PCTG resulted in the deterioration of the light-shielding property of comparative example 5 and the failure of the light-reflecting property after aging of the xenon lamp; comparative example 6 was too small in the amount of PCTG compared to example 1, resulting in poor appearance and poor emission of comparative example 6. Comparative example 7 was a non-rutile titanium dioxide powder compared to example 1, resulting in deterioration of light-shielding properties, appearance and emission properties of comparative example 7.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The PC/ABS composite material is characterized by comprising the following components in parts by weight:
the titanium dioxide is rutile titanium dioxide, and the average grain diameter of the rutile titanium dioxide is 0.2-0.3 mu m;
the compatilizer is one or more of styrene, nitrile rubber and maleic anhydride multipolymer;
the sum of the residual monomer amounts in the ABS resin is less than or equal to 400ppm.
2. The PC/ABS composite according to claim 1 wherein the PC resin has a melt index of 9-11g/10min, the melt index being measured according to GB/T3682-2018 standard at 300 ℃ under 1.2kg conditions.
3. The PC/ABS composite according to claim 1 wherein the ABS resin has a melt index of 20-30g/10min, the melt index being measured according to GB/T3682-2018 standard at 220 ℃ under 10kg conditions.
4. The PC/ABS composite according to claim 1 wherein the light stabilizer is a benzotriazole-based light stabilizer and/or a hindered amine-based uv absorber.
5. The PC/ABS composite of claim 1 further comprising 0.1 to 1 part of an auxiliary agent.
6. The PC/ABS composite of claim 5 wherein the adjuvant includes, but is not limited to, an antioxidant or a lubricant.
7. A method of preparing a PC/ABS composite according to any one of claims 1 to 6, comprising the steps of:
s1: weighing the components according to the proportion, and premixing to obtain a premix;
s2: and (3) putting the premix in the step (S1) into an extruder, carrying out melt blending, extruding and granulating to obtain the PC/ABS composite material.
8. Use of a PC/ABS composite according to any one of claims 1-6 for the preparation of a light reflecting means.
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2022
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| CN112679931A (en) * | 2020-11-27 | 2021-04-20 | 广东金发科技有限公司 | PC/ABS and regenerated PCTG composite material for electric meter box and preparation method thereof |
| CN112778740A (en) * | 2021-01-10 | 2021-05-11 | 深圳市富恒新材料股份有限公司 | Chemical-resistant transparent polycarbonate composite material with high glowing filament ignition temperature and preparation method thereof |
| CN113736241A (en) * | 2021-08-24 | 2021-12-03 | 金发科技股份有限公司 | Polycarbonate composite material and preparation method and application thereof |
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