CN118165492A - Low-odor PC/ABS alloy for automobiles and preparation process thereof - Google Patents
Low-odor PC/ABS alloy for automobiles and preparation process thereof Download PDFInfo
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- CN118165492A CN118165492A CN202410400782.1A CN202410400782A CN118165492A CN 118165492 A CN118165492 A CN 118165492A CN 202410400782 A CN202410400782 A CN 202410400782A CN 118165492 A CN118165492 A CN 118165492A
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- 229920007019 PC/ABS Polymers 0.000 title claims abstract description 59
- 239000000956 alloy Substances 0.000 title claims abstract description 42
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 16
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 11
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 11
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000012964 benzotriazole Substances 0.000 claims abstract description 10
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 31
- 239000002245 particle Substances 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 6
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000004417 polycarbonate Substances 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 4
- 229920000515 polycarbonate Polymers 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000004793 Polystyrene Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000012745 toughening agent Substances 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims 2
- 229920006351 engineering plastic Polymers 0.000 abstract description 2
- 235000019645 odor Nutrition 0.000 description 40
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 27
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 26
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 9
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 8
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 8
- 239000012855 volatile organic compound Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000011115 styrene butadiene Substances 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013027 odor testing Methods 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 239000012994 photoredox catalyst Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 235000019633 pungent taste Nutrition 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 235000019654 spicy taste Nutrition 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 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
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 application relates to the technical field of engineering plastics, in particular to a PC/ABS alloy for a low-odor automobile and a preparation process thereof, wherein a low-odor wear-resistant auxiliary agent and a BASF benzotriazole ultraviolet absorber are added by selecting an ABS raw material polymerized by a bulk method, and the PC/ABS alloy is treated by a double-vacuum devolatilization process, so that the volatile matter content of the obtained PC/ABS alloy is reduced by 80% -90%, the odor grade reaches 2.5, and the PC/ABS alloy has good wear resistance and weather resistance. The PC/ABS alloy for the automobile, which has low odor, low VOC content and excellent performance, is successfully prepared by selecting specific raw materials, adding specific auxiliary agents and adopting an advanced preparation process. The alloy not only meets the high requirements of the internal environment of the automobile on the smell and the performance of the material, but also provides new thought and technical support for the development of the field of automobile materials.
Description
Technical Field
The application belongs to the technical field of engineering plastics, and particularly relates to a PC/ABS alloy for a low-odor automobile and a preparation process thereof.
Background
Traditional PC/ABS materials may have certain additives added during the production process, which may produce unpleasant odors that affect the comfort of the driving environment. In addition, some similar products have defects in the aspect of Volatile Organic Compound (VOC) control, so that after long-time use, the air quality in the vehicle is reduced, and potential threat is caused to the physical health of passengers. In addition to odor and VOC emissions, some similar products may suffer from poor abrasion and weather resistance. These defects may cause abrasion, aging, etc. of the material in a long-term use or severe environment, affecting the aesthetic appearance and the service life of the automobile.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the defects in the prior art, the PC/ABS alloy for the low-odor automobile and the preparation process are provided, and the PC/ABS alloy prepared by selecting specific raw materials, adding specific auxiliary agents and adopting an advanced preparation process has low odor and low VOC content, and simultaneously maintains good wear resistance and weather resistance.
The technical scheme adopted for solving the technical problems is as follows:
the PC/ABS alloy for the low-odor automobile is prepared from the following raw materials:
Bulk polymerized ABS, wherein the bulk polymerized ABS is obtained by blending a styrene-butadiene-styrene copolymer and polystyrene;
A polycarbonate;
A low odor wear resistant aid;
BASF benzotriazole ultraviolet absorbers.
Preferably, the PC/ABS alloy for the low-odor automobile and the preparation process thereof comprise 20-35% of ABS polymerized by a bulk method.
Preferably, the PC/ABS alloy for the low-odor automobile and the preparation process thereof comprise 0.5-2% of low-odor wear-resistant auxiliary agent by weight of the total alloy.
Preferably, the PC/ABS alloy for the low-odor automobile and the preparation process thereof comprise 0.5-2% of the total weight of the alloy, wherein the content of the BASF benzotriazole ultraviolet absorber is 0.5-2%.
A process for preparing a low odor automotive PC/ABS alloy comprising the steps of:
Uniformly mixing PC, ABS polymerized by a bulk method, a low-odor wear-resistant auxiliary agent, a BASF benzotriazole ultraviolet absorber and other additives according to a preset proportion;
feeding the mixed raw materials into a double-screw granulator, and fully melting and plasticizing the raw materials by adjusting technical parameters;
in the melting plasticizing process, starting a double-vacuum devolatilizer to devolatilize the gas in a melting system, and keeping the vacuum degree between-0.08 MPa and-0.1 MPa;
granulating the melted, plasticized and devolatilized material by a granulator;
Cooling and screening the granulated material by a screening machine;
And sealing and packaging the screened PC/ABS alloy particles by using a clean and unbroken aluminum foil bag.
Preferably, the preparation process of the PC/ABS alloy for the low-odor automobile comprises the following raw materials in percentage: 65% of PC,25% of ABS (PA-1730), 1% of low-odor wear-resistant auxiliary agent, 1% of Pasteur ultraviolet absorber 329,5% of M724 toughening agent and other additives.
Preferably, the preparation process of the PC/ABS alloy for the low-odor automobile has the advantages that the screw rotating speed of a double-screw granulator is 250-350 rpm, and the melting plasticizing temperature is 250-270 ℃.
Preferably, the preparation process of the PC/ABS alloy for the low-odor automobile, disclosed by the invention, has the advantages that the odor grade of the prepared PC/ABS alloy for the low-odor automobile is lower than 2.5, and the VOC content is reduced by 80% -90%.
The beneficial effects of the invention are as follows:
(1) The ABS raw material polymerized by the bulk method is selected, so that the odor grade of the material is reduced, and the applicability of the material in the internal environment of an automobile is improved;
(2) The low-odor wear-resistant auxiliary agent and the BASF benzotriazole ultraviolet absorber are added, so that the wear resistance and weather resistance of PC/ABS are effectively improved, and the comprehensive performance of the PC/ABS is improved;
(3) By adopting the double-vacuum devolatilization process, the volatile matter content of the material is effectively reduced, and the environmental protection performance of the material is further improved.
Drawings
The technical scheme of the application is further described below with reference to the accompanying drawings and examples.
FIG. 1 is a schematic process flow diagram of an embodiment of the present application;
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art in a specific case.
The technical scheme of the present application will be described in detail below with reference to the accompanying drawings in combination with embodiments.
Examples
The embodiment provides a PC/ABS alloy for low-odor automobiles, wherein the raw material ABS adopted by the conventional PC/ABS alloy is generally polymerized ABS by an emulsion method, and in order to improve the odor of the PC/ABS, the embodiment selects ABS raw material polymerized by a bulk method.
Bulk ABS is obtained by blending styrene-butadiene-styrene (SBS) copolymer and Polystyrene (PS), whereas general ABS is obtained by blending acrylonitrile-butadiene-styrene (ABS) copolymer and styrene-butadiene (SB) copolymer. In the preparation process of the bulk method, the SBS copolymer is used as a toughening agent, so that the toughness and impact resistance of the ABS can be improved to a certain extent. In the general ABS preparation process, SB copolymer mainly plays a role in plasticization and toughening.
Based on the common PC/ABS alloy formula, the low-odor wear-resistant auxiliary agent and the BASF benzotriazole ultraviolet absorber (Basoff ultraviolet absorber 329) are added in the embodiment, so that the wear resistance and weather resistance of the PC/ABS are improved.
And (3) adopting a double-vacuum devolatilization process (ensuring the vacuum degree to be-0.08 MPa) to treat the PC/ABS particles. (selection of a double vacuum devolatilizer with high vacuum, high devolatilization efficiency and stable operation, ensuring that the machine can withstand high temperatures and pressures, and has good sealing properties.)
In this embodiment, a preparation process of a low-odor automobile PC/ABS alloy is provided, which specifically comprises the following steps:
(1) According to the improved formula, the plastic raw materials to be treated are uniformly mixed according to the following proportion.
Production formula of modified PC/ABS alloy for low-odor automobile
(2) And (3) sending the mixed raw materials into a double-screw granulator through a conveying system, adjusting the technical parameters (see figure 1) of the granulator to enable the raw materials to be fully melted and plasticized, and opening the double-vacuum devolatilizer to devolatilize the gas generated in the screw rod in the strong shearing process of the double-screw granulator.
PC/ABS granulation technological parameters
(FIG. 1)
(3) And (3) granulating the melted and plasticized material by a granulator in a granulating system.
(4) And (5) using a screening machine meeting the production quality standard to cool and screen the plastic particles.
(5) And immediately after the material is taken off line, sealing and packaging the material by using a clean and unbroken aluminum foil bag.
The effect achieved by this embodiment is: when ABS raw materials polymerized by a bulk method are adopted and devolatilized by double vacuum (the vacuum degree is minus 0.08 MPa), the volatile content of the material is reduced by 80 percent to 90 percent, and the odor grade can reach 2.5. The low-odor wear-resistant auxiliary agent and the BASF benzotriazole ultraviolet absorber play a positive role in the new formula, ensure low odor and improve the wear resistance and weather resistance of PC/ABS.
The embodiment also provides an experimental process for preparing the PC/ABS alloy for the low-odor automobile.
1. The main raw materials are selected
Through strict screening, three major mainstream automobile grade material suppliers (A, B, C for short) on the market are selected as the suppliers of PC/ABS raw materials in the embodiment. The particles provided by these suppliers (particle A, B, C for short) all meet stringent vehicle-grade standards.
2. Main equipment and instrument for application
TD-GC-MS system and GC-MS 6800 gas chromatography-mass spectrometer
3. Testing and results
3.1 Odor evaluation
This example follows the odor evaluation Standard for automotive materials, PV 3900-2019, and a professional odor test was performed on PC/ABS raw materials. In the test, 25 g of PC/ABS particles were weighed precisely, placed in a1 liter odor bottle and heated in an oven at 80℃for 2 hours. After completion, the mixture was rapidly taken out and naturally cooled to (65.+ -. 5) ℃ and then subjected to standard odor evaluation. The odor rating criteria are shown in Table 1.
TABLE 1 odor rating criteria
3.2TD-GC-MS analysis
According to the relevant standard, the embodiment uses a TD-GC-MS system to carry out deep analysis on PC/ABS particles. In the test, the example accurately weighed a sample of particles and heated at 90 ℃ for 30 minutes to sufficiently release volatile compounds therein. These compounds were then analyzed in detail by a TD-GC-MS system.
In this example, an Elite-5MS type column with a specification of 60m×0.32mm×1 μm was used to ensure the accuracy and reliability of the analysis. In the heating program, after the initial temperature was maintained for 5 minutes, it was raised to 160℃at a rate of 5K/min for 2 minutes, and then raised to 250℃at a rate of 10K/min for 10 minutes. In addition, the ion source temperature and the interface temperature are both set to 250 ℃ in the embodiment, and the scanning range is 35-350, so that high sensitivity and wide compound detection are ensured. Through the series of test conditions, the embodiment successfully obtains the detailed information of volatile components in the PC/ABS particles, and provides powerful support for material performance evaluation.
4. Results and discussion
4.1 Odor evaluation results
The results after odor testing of the PC/ABS materials provided by three different suppliers are shown in Table 2.
TABLE 2 results of PC/ABS odor test
| Particles | Odor rating | Odor type |
| A | 4.5 | Pungent and spicy taste and odor |
| B | 4.0 | Solvent smell and mildew smell |
| C | 4.0 | Solvent smell and mildew smell |
Particles B and C are significantly better in odor than particles a, and there is a significant difference in odor type. Particle a gives off a pungent, spicy and odorous smell, while particles B and C mainly exhibit solvent and mould smell. This difference may be related to the emulsion process used by vendor a to polymerize ABS feedstock, which may result in more small molecule materials remaining in the finished product, causing odor problems. In contrast, bulk polymerized ABS feedstock employed by suppliers B and C has low residue characteristics and better odor performance.
The present example provides insight into the VOC content released by PC/ABS materials as analyzed by the TD-GC-MS system. The system not only performs qualitative and quantitative analysis on the VOCs, but also accurately identifies key substances affecting the smell of the material. When comparing different particles, it was found that the odor characteristics of acrylonitrile, styrene and α -methylstyrene were similar to those of particle A, and the higher the content, the main source of odor for particle A. While the odor characteristics of ethylbenzene and acetophenone are more consistent with particles B and C, the content in particle a is relatively low, masked by other strong odors.
4.2 Odor substance Source analysis
Studies have revealed that the major odor of PC/ABS comes from a number of aspects, including monomer residues during ABS polymerization, degradation of the polymer during processing, and solvent residues. The main odorants of particle a include acrylonitrile, ethylbenzene, styrene, alpha-methylstyrene and acetophenone, mainly from incompletely reacted monomer residues and thermo-oxidative degradation. The main odors of particles B and C are caused by ethylbenzene and acetophenone, which are mainly derived from thermal oxygen degradation during processing.
To improve the odor properties of PC/ABS, this example will be modified from both raw materials and processing. On one hand, the ABS raw material selection is optimized, and unreacted monomer residues are reduced so as to reduce the contents of substances such as acrylonitrile, styrene and the like. On the other hand, the processing technology is improved, the thermal oxygen degradation of the polymer chain segments in the processing process is reduced, and the production of substances such as ethylbenzene, acetophenone and the like is reduced.
4.3 Effect of raw materials on PC/ABS odor
Bulk polymerized ABS feed exhibits an odor superior to emulsion polymerized ABS, mainly due to the greater residual acrylonitrile and styrene monomer remaining during emulsion polymerization. To further verify this conclusion, this example compares three emulsion polymerized ABS (ABS-e 1, ABS-e2, ABS-e 3) with one bulk polymerized ABS (ABS-b). The test results show that the acrylonitrile and styrene contents released by the emulsion-polymerized ABS are 2-3 times that of the bulk-polymerized ABS. This data supports the inference of this example that emulsion-polymerized ABS is indeed not odorously inferior to bulk-polymerized ABS. Therefore, in order to improve the odor of PC/ABS, it is recommended to choose the ABS raw material polymerized by the bulk method preferentially.
4.4 Effect of vacuum devolatilization Process on PC/ABS odor
Aiming at the problem of thermal oxygen degradation of a polymer chain segment in the PC/ABS processing process, the embodiment adopts a screw extruder to carry out melt devolatilization treatment. Experimental results show that the double-vacuum devolatilization process has higher devolatilization efficiency compared with the single-vacuum devolatilization process. The content of five volatile matters can be reduced by 40-50% through double vacuum devolatilization process treatment. This improvement in devolatilization is due to the higher vacuum in the double vacuum devolatilization process, which more effectively promotes the release of VOCs in the melt. When the vacuum degree reaches-0.08 MPa, the content of five volatile matters can be reduced by 80% -90%, and the improvement of the devolatilization efficiency is not obvious when the vacuum degree is further improved. Therefore, the optimal vacuum devolatilization process parameters are a double vacuum devolatilization process, and the vacuum degree is maintained at-0.08 MPa. After the treatment, the odor of the PC/ABS raw material particles is obviously improved, no obvious solvent smell and no obvious mildew smell exist, the odor grade reaches 2.5, and the standard requirement is met.
With the above-described preferred embodiments according to the present application as a teaching, the worker skilled in the art could make various changes and modifications without departing from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of claims.
Claims (8)
1. The PC/ABS alloy for the low-odor automobile is characterized by being prepared from the following raw materials:
Bulk polymerized ABS, wherein the bulk polymerized ABS is obtained by blending a styrene-butadiene-styrene (SBS) copolymer and Polystyrene (PS);
Polycarbonate (PC);
A low odor wear resistant aid;
BASF benzotriazole ultraviolet absorbers.
2. The low odor automotive PC/ABS alloy and preparation process according to claim 1, wherein the content of the bulk polymerized ABS is 20% -35% of the total weight of the alloy.
3. The low-odor automobile PC/ABS alloy and the preparation process thereof according to claim 2, wherein the content of the low-odor wear-resistant additive is 0.5% -2% of the total weight of the alloy.
4. The low odor automotive PC/ABS alloy and preparation process according to claim 3, wherein the content of the BASF benzotriazole ultraviolet absorber is 0.5% -2% of the total weight of the alloy.
5. A process for preparing the low odor automotive PC/ABS alloy of any one of claims 1-4 comprising the steps of:
(a) Uniformly mixing PC, ABS polymerized by a bulk method, a low-odor wear-resistant auxiliary agent, a BASF benzotriazole ultraviolet absorber and other additives according to a preset proportion;
(b) Feeding the mixed raw materials into a double-screw granulator, and fully melting and plasticizing the raw materials by adjusting technical parameters;
(c) In the melting plasticizing process, starting a double-vacuum devolatilizer to devolatilize the gas in a melting system, and keeping the vacuum degree between-0.08 MPa and-0.1 MPa;
(d) Granulating the melted, plasticized and devolatilized material by a granulator;
(e) Cooling and screening the granulated material by a screening machine;
(f) And sealing and packaging the screened PC/ABS alloy particles by using a clean and unbroken aluminum foil bag.
6. The process for preparing the PC/ABS alloy for the low-odor automobile according to claim 5, wherein the raw materials are in the following proportions: 65% of PC,25% of ABS (PA-1730), 1% of low-odor wear-resistant auxiliary agent, 1% of Pasteur ultraviolet absorber 329,5% of M724 toughening agent and the balance of additive.
7. The process for preparing a PC/ABS alloy for a low-odor automobile according to claim 5, wherein the screw speed of the twin-screw granulator is 250rpm-350rpm, and the melt plasticizing temperature is 250-270 ℃.
8. The process for preparing a low odor automotive PC/ABS alloy according to claim 5, wherein the prepared low odor automotive PC/ABS alloy has an odor level of less than 2.5 and a VOC content reduced by 80% -90%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410400782.1A CN118165492A (en) | 2024-04-03 | 2024-04-03 | Low-odor PC/ABS alloy for automobiles and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410400782.1A CN118165492A (en) | 2024-04-03 | 2024-04-03 | Low-odor PC/ABS alloy for automobiles and preparation process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN118165492A true CN118165492A (en) | 2024-06-11 |
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