An oil- and chemical-resistant and scratch-resistant PMMA / ABS composition and its preparation method

Abstract

The present invention discloses an oil-resistant, chemical-resistant and scratch-resistant PMMA / ABS composition and a preparation method thereof. Among them, the PMMA / ABS composition contains the following components by weight: 25-55 parts of PMMA resin; 30-70 parts of ABS resin; 5-10 parts of NBR rubber; 1-4 parts of compatibilizer; 0.3-1 part of super dispersant; 0.2-1 part of antioxidant; 0.5-1 part of scratch-resistant dispersing lubricant; 0.2-0.5 part of light stabilizer; 0.3-1 part of pigment. The PMMA / ABS composition of the present invention has high gloss, spray-free, good surface scratch resistance, excellent chemical solvent cracking resistance such as glacial acetic acid, excellent oil resistance such as mineral oil, liquid fuel, animal and vegetable oil, etc., and better pigment dispersibility, and can be applied to various household appliance accessories, especially large household appliances such as LCD TVs, wireless headphones, flat panel panels, navigator panels, car grilles and other components.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and particularly relates to an oil-resistant, chemical-resistant and scratch-resistant PMMA / ABS composition and a preparation method thereof. Background Art

[0002] Polymethyl methacrylate (abbreviation: PMMA), also known as acrylic or plexiglass, has excellent optical properties due to its high transparency, and has excellent weather resistance, mechanical strength, good heat insulation, sound insulation and insulation properties, high gloss, strong coloring power and scratch resistance. It is a rigid, hard, colorless and transparent material with excellent resistance to atmospheric aging. In the automotive field, PMMA resin can be applied to components such as window glass, instrument glass, and vehicle lamps. It has relatively high rigidity but poor impact toughness, belongs to a hard and brittle plastic, has notch sensitivity, is prone to cracking under stress, has poor cold resistance, is prone to embrittlement at low temperatures, has a high melt viscosity, poor fluidity, a fast cooling rate, and is prone to generating internal stress. It can resist relatively dilute inorganic acids, but concentrated inorganic acids can corrode it, and it has poor chemical reagent and solvent resistance, and will swell in glacial acetic acid and alcohols, resulting in stress cracking. Therefore, its application is restricted.

[0003] ABS is a terpolymer composed of acrylonitrile, butadiene and styrene. It has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties, and also has characteristics such as easy processing, stable product dimensions, and good surface gloss. It is easy to paint and color, and can also be surface-sprayed with metal and electroplated. Acrylonitrile imparts chemical stability, oil resistance, and a certain degree of rigidity and hardness to the ABS resin.

[0004] The PMMA / ABS alloy absorbs their respective characteristics, retains the gloss and hardness of PMMA, has scratch resistance, improves the impact performance of PMMA at the same time, alleviates the stress cracking of PMMA to a certain extent, and improves fluidity. It is widely used in appearance products such as automotive front grilles and consumer electronics that do not require painting.

[0005] Chinese Patent CN110256804A discloses a preparation method of a tough and scratch-resistant PMMA / ABS box material, which records a preparation method of a tough and scratch-resistant PMMA / ABS box material. By using PMMA as a modified material for ABS to obtain a composite material, the box shell made of the composite material has advantages such as high surface hardness, high gloss, scratch resistance, no need for film covering, no need for painting or electroplating, low cost, etc. It can also be injection molded or thermoformed in one step, without additional film covering, polishing, grinding, and painting processes, has the brightness of metal, and has a simple preparation process and low cost. The obtained PMMA / ABS alloy has excellent mechanical properties while improving the surface hardness of ABS, and can be widely used in electronic and electrical products and automotive parts, eliminating the traditional plastic part surface painting process.

[0006] Chinese patent CN103804829A discloses a PMMA / ABS for automobile headlight rear cover, specifically recording a PMMA / ABS alloy for automobile headlight rear cover, including: polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer, impact modifier, compatibilizer, flame retardant, toughening agent, filler, and the formula of the PMMA / ABS alloy is as follows by weight: 20-80 parts of polymethyl methacrylate, 10-40 parts of acrylonitrile-butadiene-styrene copolymer, 5-10 parts of impact modifier, 4-10 parts of compatibilizer, 1-10 parts of flame retardant, and 4-10 parts of filler. Through the above method, the application can provide a PMMA / ABS alloy for automobile headlight rear cover, combining the advantages of the two plastics and making up for their respective shortcomings, blending PMMA and ABS, adding other additives, and compared with ordinary ABS resin, the surface finish of PMMA and ABS alloy is higher, the heat resistance is good, and it fully meets the use requirements of automobile headlight rear cover.

[0007] Chinese patent CN105733153A records a spray-free PMMA material, a spray-free PMMA and ABS co-extruded decorative strip and a refrigerator used therein, and discloses a spray-free PMMA material prepared from raw materials including the following ingredients: PMMA: 30-100 parts, toughening aid 1-35 parts, silica gel 0.1-2 parts, pigment 0.5-5 parts, metal aluminum powder 0.1-4 parts, antioxidant 0.1-6 parts, dispersant 0.1-3 parts. The application further provides a decorative strip prepared from the spray-free PMMA material; the decorative strip can be prepared from the spray-free PMMA material and ordinary ABS using a co-extrusion process, which can achieve excellent effects such as high hardness, high gloss and good light resistance, while effectively reducing production costs. The decorative strip can be applied to refrigerators and has good application effects.

[0008] However, as people's quality of life improves, higher requirements are also placed on the product use environment. For example, accessories such as car grilles are easily corroded by automobile fuels such as gasoline. Consumer electronic products may come into contact with hand sweat or acidic chemicals during use, which may affect the appearance. The PMMA / ABS materials disclosed in the above patents have limitations on chemical solvent resistance and oil resistance. When the materials encounter chemical solvents or fuels such as gasoline during use, they are prone to cracking, which affects the service life of the materials and even poses a personal safety hazard. Summary of the invention

[0009] One of the purposes of the present invention is to provide an oil-resistant, chemical-resistant and scratch-resistant PMMA / ABS composition, which can resist corrosion by fuels such as glacial acetic acid and gasoline, has excellent oil resistance and scratch resistance, and can be applied to various home appliance accessories, especially large home appliances such as LCD TVs, wireless headphones, flat panel panels, navigation instrument panels, automobile grilles and other components.

[0010] The second object of the present invention is to provide a method for preparing an oil-resistant, chemical-resistant and scratch-resistant PMMA / ABS composition.

[0011] To achieve this purpose, the present invention adopts the following technical solutions:

[0012] On the one hand, the present invention provides an oil-resistant, chemical-resistant and scratch-resistant PMMA / ABS composition, which is characterized in that, by weight, it comprises the following components:

[0013]

[0014]

[0015] The PMMA / ABS composition of the present invention has high gloss, paint-free, good surface scratch resistance, excellent chemical solvent cracking resistance such as glacial acetic acid, excellent oil resistance such as mineral oil, liquid fuel, animal and vegetable oil, etc., and has better pigment dispersibility.

[0016] Further, the NBR rubber is any one of high ACN content NBR rubber (ACN content is 36-41%), medium-high ACN content NBR rubber (ACN content is 31-35%), and medium ACN content NBR rubber (ACN content is 25-30%).

[0017] By using NBR rubber as a toughening agent, the present invention provides toughness for the PMMA / ABS alloy system, and at the same time improves the chemical resistance and oil resistance of the system. NBR rubber, also known as butadiene-acrylonitrile rubber, is a kind of synthetic rubber prepared by emulsion polymerization of butadiene and acrylonitrile. NBR in nitrile rubber can be divided into five categories according to the ACN content, namely ultra-high, high, medium-high, medium and low acrylonitrile (i.e., acrylonitrile content (%) 42-46, 36-41, 31-35, 25-30, 18-24). The more acrylonitrile content, the better the oil resistance, but the cold resistance will decrease accordingly. It can be used in air at 120°C or in oil at 150°C for a long time. It is mainly produced by low-temperature emulsion polymerization method, and has the advantages of good oil resistance, high wear resistance, good heat resistance and strong adhesion. The molecular structures of butadiene and acrylonitrile in NBR rubber are the same as those of acrylonitrile and butadiene in ABS, and can be well compatible with each other, and have better compatibility with the compatibilizer maleic anhydride grafted polymer, so that all components of the whole PMMA / ABS maintain good compatibility.

[0018] Preferably, the NBR rubber is medium-high ACN content NBR rubber, model NBR8300.

[0019] The present invention selects NBR with a medium to high ACN content, enabling the PMMA / ABS copolymer to have excellent chemical resistance and oil resistance while ensuring a certain level of cold resistance. Conventional MBS impact modifiers do not have oil and chemical resistance functions.

[0020] Further, the PMMA resin is a commercially available polymethyl methacrylate resin with a Rockwell hardness (M scale) of greater than or equal to 85;

[0021] Preferably, the PMMA resin is selected from Asahi Kasei 560F or Mitsubishi MF-001.

[0022] Further, by mass fraction, the ABS resin is composed of 20 - 35% acrylonitrile, 15 - 25% butadiene, and 40 - 65% styrene, with a total mass fraction of 100%.

[0023] Preferably, the ABS is selected from LG Chem HI121H or Formosa Plastics AG15A1.

[0024] Further, the compatibilizer is a maleic anhydride-grafted polymer with a maleic anhydride content of 3 - 25 wt%;

[0025] Preferably, the compatibilizer is selected from any one of styrene-acrylonitrile-maleic anhydride copolymer, acrylate-maleic anhydride copolymer, styrene-acrylonitrile-glycidyl functional group-maleic anhydride copolymer, and styrene-maleic anhydride copolymer;

[0026] Preferably, the compatibilizer is selected from one of SMA-700, SMA-725, and SMA-800.

[0027] Since the compatibility between the PMMA resin and the ABS resin is very poor, prone to layering and reduction of impact performance, the present invention uses high-flow PMMA and selects a maleic anhydride-grafted polymer (such as styrene-acrylonitrile-maleic anhydride copolymer, etc.) as the compatibilizer. One end of the compatibilizer, the polar maleic anhydride group, can react with the polar ester bond group in the PMMA resin, and the other end, the styrene-acrylonitrile group, is itself a component of ABS and has good compatibility with the ABS resin. The compatibilizer plays a bridging and compatibilizing role between PMMA and ABS, improving the interfacial bonding between PMMA and ABS to eliminate the generation of weld lines on the surface of the molded product.

[0028] Further, the hyperdispersant is composed of 5 - 20 wt% anchoring groups and 80 - 95 wt% solvation chains;

[0029] Preferably, the anchoring groups are selected from -R2N, -R3N + ,-COOH, -SO3H, -SO 2- ,-PO4 2-, one or at least two of polyamines, polyols or polyethers;

[0030] Preferably, the solvation chain is selected from one or at least two of polyester, polyether, polyolefin or polyacrylate;

[0031] Preferably, the hyperdispersant is selected from Lubrizol DP-310 or Fumei brand R1800-S.

[0032] The hyperdispersant added in the present invention, the anchoring groups in the hyperdispersant infiltrate, engage and adsorb with inorganic pigments such as metallic aluminum powder and carbon black to solve the pigment dispersibility; the solvation chain and the maleic anhydride groups and MMA in the PMMA / ABS copolymer act together on PMMA and ABS to increase the compatibility of each component, that is, the pigment not only ensures the dispersion in the plastic matrix but also increases the compatibility with the plastic matrix resin, avoiding the generation of pigment agglomeration, which affects the appearance and the uniformity of the pigment color, and at the same time ensuring that the gloss of the composition is not affected, so it can be made into a paint-free and high-gloss color.

[0033] In addition, due to the addition of NBR rubber, it has a certain impact on the surface hardness and scratch resistance of PMMA / ABS. By adding a polysiloxane lubricant containing reactive active groups, the reactive active groups react and anchor with the matrix resin, increasing the wetting dispersibility of the pigment and the compatibility of each component of the matrix resin. The polysiloxane groups lubricate the surface, thereby improving the surface scratch resistance and the demolding property of the blend.

[0034] Further, the antioxidant is a mixture composed of a phosphoric acid ester antioxidant and a hindered phenol antioxidant with a mass ratio of 3-1:1.

[0035] Further, the scratch-resistant dispersant lubricant is a polysiloxane lubricant containing reactive active groups;

[0036] Preferably, the scratch-resistant dispersant lubricant is selected from Degussa Tegomer V-Si 4042 or E525.

[0037] Further, the light stabilizer is selected from any one of UV-P, UV-770, UV-234, UV-360.

[0038] The PMMA / ABS composition of the present invention has oil resistance, chemical resistance, scratch resistance and high-gloss color; at the same time, it has excellent functions such as resistance to cracking by chemicals such as glacial acetic acid and oil resistance.

[0039] On the other hand, a method for preparing the oil-resistant and chemical-resistant scratch-resistant PMMA / ABS composition as described above is provided, including the following steps:

[0040] S10. First, put the hyperdispersant and the pigment into a blender according to the weight parts and stir to make the pigment and the hyperdispersant fully infiltrate, engage, adsorb and disperse evenly, serving as component (1).

[0041] S20. Put the ABS resin, NBR rubber and compatibilizer into a mixer according to the weight parts and stir evenly, then add the PMMA resin and stir evenly. Finally, add component (1), antioxidant, scratch-resistant lubricant and light stabilizer and stir evenly, serving as component (2).

[0042] S30. Put component (2) into a twin-screw extruder, and through extrusion granulation, traction and bar drawing, water tank cooling, dehydration and pelletizing, a PMMA / ABS composite material with oil and chemical resistance and scratch resistance is obtained.

[0043] Specifically, the preparation method of the PMMA / ABS composite with oil and chemical resistance and scratch resistance includes the following steps:

[0044] (1) First, put the hyperdispersant and the pigment into a high-speed blender according to the weight parts and stir at high speed for 5 minutes to make the pigment and the hyperdispersant fully infiltrate, engage, adsorb and disperse evenly, serving as component (1).

[0045] (2) Put the ABS resin, NBR rubber and compatibilizer into a mixer according to the weight parts and stir for 5 minutes, then add the PMMA resin and stir for 5 minutes. Finally, add component (1), antioxidant, scratch-resistant lubricant and light stabilizer and stir for 5 minutes.

[0046] (3) Put the mixed materials into the main feeding hopper of a twin-screw extruder, and through processes such as heating and melting, blending, plasticizing and shear dispersion in the twin-screw extruder, extrude and granulate. The main machine speed is 400 - 450 revolutions per minute, and the extrusion temperature is 190 - 220 °C. Finally, through traction and bar drawing, water tank cooling, dehydration and pelletizing, a PMMA / ABS composite material with oil and chemical resistance and scratch resistance is obtained.

[0047] The beneficial effects of the present invention:

[0048] (1). It has better chemical solvent cracking resistance functions such as to glacial acetic acid than existing products.

[0049] (2). It has excellent oil resistance such as mineral oil, liquid fuel, animal and vegetable oil, etc.

[0050] (3). It has better dispersibility and compatibility than existing products, so it can be made into colors such as bright metallic effect colors or high-gloss colors.

[0051] (4). Using polysiloxane lubricants has more excellent scratch resistance and demoulding properties than existing products. Specific embodiments

[0052] The technical solution of the present invention will be further described below through specific embodiments.

[0053] Without specific description, various raw materials of the present invention can be purchased commercially or prepared according to the conventional methods in the technical field.

[0054] Example 1

[0055] 1. Weigh 0.5 parts of the hyperdispersant DP-310 and 0.5 parts of the pigment in parts by mass and put them into a high-speed mixer to stir and disperse for 5 minutes to obtain Component (1).

[0056] 2. Weigh 64.5 parts of the ABS resin HI121H, 5 parts of the NBR rubber 8300, and 3 parts of the compatibilizer SMA-700 in parts by mass and put them into a mixer to stir for 5 minutes. Then add 25 parts of the PMMA resin MF-001 and stir for 5 minutes. Finally, add Component (1), 0.3 parts of the antioxidant (1076:168 = 2:1), 1 part of the scratch-resistant dispersant lubricant Tegomer V-Si 4042, and 0.2 parts of the light stabilizer UV-234 and stir together for 5 minutes to obtain Component (2).

[0057] 3. Put Component (2) into the main hopper of a twin-screw extruder and carry out processes such as heating and melting, blending, plasticizing, and shear dispersion in the twin-screw extruder to extrude and pelletize. The main machine speed is 400 r / min, and the extrusion temperature in Zone 1 is 190 °C, Zone 2 is 200 °C, Zone 3 is 200 °C, Zone 4 is 200 °C, Zone 5 is 200 °C, Zone 6 is 200 °C, Zone 7 is 195 °C, Zone 8 is 195 °C, Zone 9 is 190 °C, Zone 10 is 190 °C, Zone 11 is 195 °C, Zone 12 is 200 °C, and the die head is 210 °C. Finally, through processes such as traction and striping, water tank cooling, dehydration, and pelletizing, a PMMA / ABS composite material with oil and chemical resistance and scratch resistance is obtained.

[0058] The preparation methods of Examples 2-5 and Comparative Examples 1-5 are basically the same as that of Example 1 above, except for the addition amounts (parts by weight) of each raw material. See Table 1 for details.

[0059] Table 1. Addition amounts (parts by weight) of each raw material in Examples 1-5 and Comparative Examples 1-6

[0060]

[0061] Performance test:

[0062] 1. Prepare ISO standard test bars and flame retardant test bars with a thickness of 2.0 mm from the PMMA / ASA composite materials with oil and chemical resistance and scratch resistance prepared in Examples 1-5 and Comparative Examples 1-5 at an injection molding temperature of 200-220 °C. Test according to the test standards.

[0063] 2. Izod impact strength of cantilever beam: Tested in accordance with ISO 180.

[0064] 3. Scratch resistance: Conducted according to SN / T 4449-2016 "Test Method for Scratch Resistance of Automotive Interior Materials".

[0065] 4. Chemical resistance: Bend the flame retardant strip by 120° and soak it in glacial acetic acid at room temperature respectively to observe the surface cracking time.

[0066] 5. Gasoline resistance: Bend the flame retardant strip by 120° and soak it in 92# gasoline at room temperature for 30 minutes respectively to observe the surface changes.

[0067] The test results are shown in Table 2 below.

[0068] Table 2. Performance test results

[0069]

[0070] Note: Scratch resistance grade:

[0071] Grade 1: Scratch lines are hardly visible or completely invisible;

[0072] Grade 2: Scratch lines are basically visible;

[0073] Grade 3: Scratch lines are clearly visible, and there are gloss changes or polishing phenomena on the scratched surface;

[0074] Grade 4: Scratch lines are relatively serious, and there are obvious whitening or discoloration phenomena on the scratched surface;

[0075] Grade 5: Scratch lines are very serious, and there are serious scratches or cracking phenomena on the scratched surface.

[0076] Comparing Example 1 with Comparative Example 1: The impact strength of Comparative Example 1 is 8 KJ / ㎡, which is lower than 12 KJ / ㎡ of Example 1. Comparative Example 1 cracked after soaking in 92# gasoline for 30 minutes, and cracked after soaking in glacial acetic acid for only 0.5 minutes. This is because NBR rubber toughening agent was added in Example 1, while it was not in Comparative Example 1. It can be seen that the addition of NBR rubber toughening agent improves the impact strength of PMMA / ABS copolymer, and improves the gasoline resistance and glacial acetic acid corrosion resistance of PMMA / ABS copolymer. Therefore, if NBR rubber is not added to the formulation system, it will bring the safety risk of product cracking when encountering chemicals or oil-based liquids.

[0077] Example 2 is compared with Comparative Example 2: In Example 2, an NBR rubber toughening agent is used, which has good gasoline resistance and ice acetic acid cracking resistance. In Comparative Example 2, an MBS impact modifier is used. Although the impact strength is the same as that in Example 2 where the NBR rubber toughening agent is used, the ice acetic acid cracking resistance time of Comparative Example 2 is only 1 minute, which is much shorter than 8 minutes of Example 2. Moreover, after soaking in 92# gasoline for 30 minutes, Comparative Example 2 has cracked, while Example 2 has not. It can be seen that the NBR rubber toughening agent not only effectively improves the impact toughness of the PMMA / ABS copolymer, but also greatly improves the cracking resistance to chemicals such as ice acetic acid and gasoline resistance, reducing the cracking risk of the material when encountering chemicals such as gasoline or ice acetic acid.

[0078] Example 3 is compared with Comparative Example 3: The impact strength of Example 3 is 14 KJ / ㎡, which is higher than 11 KJ / ㎡ of Comparative Example 3. This is because a compatibilizer is added in Example 3 while not in Comparative Example 3. It can be seen that adding a compatibilizer improves the compatibility of each component, so that Example 3 with the added compatibilizer has higher impact performance than Comparative Example 3 without the added compatibilizer.

[0079] Example 4 is compared with Comparative Example 4: The scratch resistance of Example 4 is grade 1, which is much better than grade 3 of Comparative Example 4. Example 4 has good scratch resistance due to the addition of a scratch-resistant dispersing lubricant. When the surface scratch resistance test is carried out on Comparative Example 4 without the added scratch-resistant dispersing lubricant, clear scratch lines have appeared on the surface. It can be seen that the surface of Example 4 with the added scratch-resistant dispersing lubricant has better scratch resistance than Comparative Example 4 without the added scratch-resistant dispersant.

[0080] Example 5 is compared with Comparative Example 5: It is mainly reflected on the surface. The surface color of Example 5 is bright, evenly dispersed and without flow marks; the surface color of Comparative Example 5 has poor dispersion, with color mixing and color powder agglomeration phenomena, showing uneven gloss. This is due to the addition of a hyperdispersant in Example 5. The anchoring group in the hyperdispersant infiltrates, meshes and adsorbs with the pigment, improving the pigment dispersion; the solvated chain and the maleic anhydride group and MMA in the PMMA / ABS copolymer act together on PMMA and ABS to increase the compatibility of each component, that is, the pigment not only ensures dispersion in the plastic matrix, but also increases the compatibility with the plastic matrix resin, effectively avoiding the appearance of flow marks and color mixing. At the same time, it ensures that the gloss of the composition is not affected, ensuring a uniform and bright color.

[0081] The above embodiments are only used to illustrate the detailed method of the present invention. The present invention is not limited to the above detailed method, that is, it does not mean that the present invention must rely on the above detailed method to be implemented. Those skilled in the art should understand that any improvement of the present invention, the equivalent substitution of each raw material of the products of the present invention, the addition of auxiliary components, the selection of specific methods, etc. all fall within the protection scope and the disclosure scope of the present invention.

Claims

1. An oil- and chemical-resistant scratch-resistant PMMA / ABS composition, characterized in that, By weight parts, it comprises the following components: Among them, the hyperdispersant consists of 5-20 wt% of an anchoring group and 80-95 wt% of a solvation chain; the scratch-resistant dispersing lubricant is a polysiloxane lubricant containing reactive active groups.

2. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein The PMMA resin is a commercially available polymethyl methacrylate resin with a Rockwell hardness (M scale) of greater than or equal to 85.

3. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein, The PMMA resin is selected from Asahi Kasei 560F or Mitsubishi MF-001.

4. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein By mass fraction, the ABS resin consists of 20-35% acrylonitrile, 15-25% butadiene and 40-65% styrene, and the total mass fraction is 100%.

5. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein The ABS resin is selected from LG Chem HI121H or Formosa Plastics AG15A1.

6. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein The compatibilizer is a polymer grafted with maleic anhydride, and the maleic anhydride content is 3-25 wt%.

7. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein The compatibilizer is selected from any one of styrene-acrylonitrile-maleic anhydride copolymer, acrylate-maleic anhydride copolymer, styrene-acrylonitrile-glycidyl functional group-maleic anhydride copolymer, and styrene-maleic anhydride copolymer.

8. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein The compatibilizer is selected from one of SMA-700, SMA-725, and SMA-800.

9. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein The anchoring group is selected from -R2N, -R3N + , -COOH, -SO3H, -SO 2- , -PO4 2- , one or at least two of polyamines, polyols or polyethers.

10. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein The solvation chain is selected from one or at least two of polyester, polyether, polyolefin or polyacrylate.

11. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, characterized in that, The hyperdispersant is selected from Lubrizol DP-310 or Fenmei Brand R1800-S.

12. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, characterized in that, The antioxidant is a mixture composed of a phosphite antioxidant and a hindered phenol antioxidant with a mass ratio of 3-1:

1.

13. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein The scratch-resistant dispersing lubricant is selected from Degussa Tegomer V-Si 4042 or E525.

14. The oil- and chemical-resistant and scratch-resistant PMMA / ABS composition according to claim 1, wherein The light stabilizer is selected from any one of UV-P, UV-770, UV-234, and UV-360.

15. A method for preparing an oil-resistant, chemical-resistant and scratch-resistant PMMA / ABS composition according to any one of claims 1-14, characterized in that, It includes the following steps: S10. First, put the hyperdispersant and the pigment into a blender by weight parts and stir to make the pigment and the hyperdispersant fully infiltrate, engage, adsorb and disperse evenly, as component (one); S20. Put the ABS resin, NBR rubber, and compatibilizer into a mixer by weight parts and stir evenly, then add the PMMA resin and stir evenly, and finally add component (one), antioxidant, scratch-resistant lubricant, and light stabilizer and stir evenly to obtain component (two); S30. Put component (two) into a twin-screw extruder, and through extrusion granulation, traction and bar drawing, water tank cooling, dehydration, and pelletizing, a PMMA / ABS composite material with oil and chemical resistance and scratch resistance is prepared.

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