Production process of low-gloss and high-modulus enhanced ABS (Acrylonitrile Butadiene Styrene) material

Abstract

The invention discloses a production process of a low-gloss and high-modulus enhanced ABS (acrylonitrile butadiene styrene) material, and relates to the technical field of ABS materials, and the production process comprises the following steps: weighing main materials and auxiliary materials required by the enhanced ABS material according to a formula; respectively adding the main material and the auxiliary material into stirring equipment, and uniformly mixing to obtain a mixed material; carrying out extrusion processing on the mixed material in a screw extruder; and sequentially carrying out water cooling, pelletizing and drying to obtain the enhanced ABS material. According to the invention, two kinds of ABS prepared by selecting a bulk method and an emulsion method are blended with talcum powder and calcium carbonate in proportion, a terpolymer of styrene, nitrogen phenyl maleimide and maleic anhydride is added as a graft, and a core-shell polymer of styrene-acrylonitrile-butadiene rubber is added as MBS to obtain the enhanced ABS material. The ABS material has the advantages of low gloss, high rigidity, low cost and excellent performance compared with PC / ABS, has the characteristics of no spraying and the like, and brings greater profit margin for the plastic industry.

Description

Technical Field

[0001] The present invention relates to the technical field of ABS materials, and particularly relates to a production process of an enhanced ABS material with low gloss and high modulus. Background Art

[0002] ABS resin is a graft copolymer with a butadiene main chain and acrylonitrile and styrene side chains, a random copolymer of acrylonitrile and styrene, and free polybutadiene blended together. It is a thermoplastic with excellent comprehensive properties between engineering plastics and general plastics; ABS has excellent toughness, rigidity, processing performance, oil resistance, and chemical resistance; ABS materials can be widely used in automotive parts, high-end home appliance industries, IT communication equipment, lighting equipment, and other fields.

[0003] With the rapid development of the global automotive industry and the increasing demand for automotive lightweighting, in recent years, the demand for modified plastics for automobiles has been increasing year by year. Among them, ABS modified materials and PC / ABS modified materials have become the development focus of the blending modification market due to their excellent balance of various properties, such as good impact strength, processing performance, and dimensional stability. With the increasing reduction of automotive costs and more stringent environmental requirements, enhanced ABS materials are bound to develop greatly in application fields such as automotive parts. Therefore, a production process of an enhanced ABS material with low gloss and high modulus is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a production process of an enhanced ABS material with low gloss and high modulus to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A production process of an enhanced ABS material with low gloss and high modulus, comprising the following steps:

[0006] Step 1: Weigh the main materials and auxiliary materials required for the enhanced ABS material according to the formula.

[0007] Step 2: Add the main materials and auxiliary materials obtained by weighing in Step 1 to a stirring device and stir until evenly mixed to obtain a mixed material.

[0008] Step 3: Extrude the mixed material obtained in Step 2 in a screw extruder.

[0009] Step 4: Cool, pelletize, and dry the strip-shaped material processed by the screw extruder in Step 3 to obtain the enhanced ABS material.

[0010] Preferably, in Step 1, the main materials of the enhanced ABS material include the following raw materials in parts by weight:

[0011] 55 - 70 parts of ABS;

[0012] 3 - 8 parts of talcum powder;

[0013] 9 - 24 parts of calcium carbonate;

[0014] 2 - 7 parts of graft;

[0015] 3 - 8 parts of MBS;

[0016] The rest is additives.

[0017] Preferably, in the enhanced ABS material, the ABS is composed of ABS-a and ABS-b, and the ratio of ABS-a to ABS-b is 31:30.

[0018] Preferably, the additives specifically include the following raw materials in parts by weight:

[0019] 6 - 16 parts of heat-resistant agent;

[0020] 0.6 - 1.6 parts of coupling agent;

[0021] 1.2 - 3.2 parts of antioxidant;

[0022] 3 - 8 parts of lubricant;

[0023] 4.8 - 12.8 parts of black masterbatch.

[0024] Preferably, in the third step, a twin-screw extruder is used for the extrusion processing of the mixed materials, and the barrel temperature of the twin-screw extruder is controlled at 220°C - 250°C.

[0025] Preferably, in the main material of the enhanced ABS material, the graft is a terpolymer of styrene, N-phenylmaleimide, and maleic anhydride.

[0026] Preferably, in the main material of the enhanced ABS material, MBS is a core-shell polymer of styrene-acrylonitrile-butadiene rubber.

[0027] On the other hand, the present invention also provides a low-gloss and high-modulus enhanced ABS material, which is obtained by using the production process of a low-gloss and high-modulus enhanced ABS material described in any one of the above.

[0028] Compared with the prior art, the technical effects of the present invention:

[0029] The present invention selects two kinds of ABS prepared by the bulk method and the emulsion method, blends them with talcum powder and calcium carbonate in proportion, adds a terpolymer of styrene, N-phenylmaleimide and maleic anhydride as a compatibilizer and heat-resistant modifier, and at the same time adds a core-shell polymer of styrene-acrylonitrile-butadiene rubber for toughening modification, and optimizes a combination with high heat resistance, high modulus and excellent performance, that is, an enhanced ABS material is obtained. This kind of ABS material has low gloss, high rigidity, low cost compared with PC / ABS, excellent performance, and characteristics such as paint-free spraying, bringing greater profit space to the plastics industry; at the same time, it can be applied to high-strength structural components such as BC pillars in the automotive industry, and has broad market space. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a process flow chart for the production of the enhanced ABS material of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0032] Example 1

[0033] The present invention provides a production process for an enhanced ABS material with low gloss and high modulus as shown in Figure 1 , in which the enhanced ABS material includes the following raw materials in parts by weight:

[0034] 31 parts of ABS prepared by the bulk method;

[0035] 30 parts of ABS prepared by the emulsion method;

[0036] 4 parts of a terpolymer of styrene, N-phenylmaleimide and maleic anhydride are selected for grafting;

[0037] 5 parts of a core-shell polymer of styrene-acrylonitrile-butadiene rubber are selected for MBS;

[0038] 5 parts of talcum powder;

[0039] 15 parts of calcium carbonate;

[0040] 7 parts of heat-resistant agent;

[0041] 0.1 part of coupling agent;

[0042] 0.2 part of antioxidant;

[0043] 0.5 part of lubricant;

[0044] 0.8 parts of masterbatch.

[0045] The specific production process of the enhanced ABS material with low gloss and high modulus includes the following steps:

[0046] Step 1: Weigh each raw material according to the formula of the above enhanced ABS material;

[0047] Step 2: Add the weighed raw materials to the stirring equipment in turn. Under the condition of 30 °C, stir mechanically with a twin-screw for 30 minutes. When feeding, the solid raw materials can be put in first, and then the liquid raw materials can be continuously put in, so that the liquid raw materials and solid raw materials can be fully mixed to obtain a uniformly mixed mixture;

[0048] Step 3: Extrude the mixture obtained in the above Step 2 in a twin-screw extruder. During the processing, the barrel temperature of the twin-screw extruder needs to be maintained within the range of 230 ± 10 °C, so that the mixture can be fully melted and extruded;

[0049] Step 4: Cool the strip extruded by the twin-screw extruder in the above Step 3 by a water cooling equipment in turn, and then send it to a pelletizing equipment for pelletizing. The extruded ABS material after pelletizing is dried to obtain the enhanced ABS material.

[0050] The enhanced ABS material prepared by the above formula and processing technology has low gloss, high rigidity, low cost compared with PC / ABS, excellent performance, and has the characteristic of being spray-free, which can bring greater profit space to the plastics industry. It can be used for high-strength structural components such as BC pillars in the automotive industry and has a broad market space.

[0051] It should be noted that ABS is composed of ABS-a and ABS-b. Among them, ABS-a is an ABS material prepared by the bulk method, and ABS-b is an ABS material prepared by the emulsion method. The bulk method can obtain high-purity ABS-a material, so that ABS-a can have high physical properties and uniformity; while the ABS-b material prepared by the emulsion method can well control the particle size of the polymer and produce better dispersion, so that the ABS-b material has good toughness and impact resistance. And in the raw material composition of the enhanced ABS material, the ratio of ABS-a to ABS-b is 31:30.

[0052] In the preferred embodiment, the heat-resistant agent can be ammonium polyphosphate, the coupling agent can be silane coupling agent, the antioxidant can be antioxidant BHT (butylated hydroxytoluene), and the lubricant can be polyethylene wax.

[0053] Comparative Example 1

[0054] The difference from Example 1 is that in the enhanced ABS material formulation, all of the ABS material is selected as the ABS prepared by the bulk method.

[0055] Comparative Example 2

[0056] The difference from Example 1 is that in the enhanced ABS material formulation, all of the ABS material is selected as the ABS prepared by the emulsion method.

[0057] Comparative Example 3

[0058] The difference from Example 1 is that in the enhanced ABS material formulation, the styrene, N-phenylmaleimide, maleic anhydride terpolymer is not used as a graft.

[0059] Comparative Example 4

[0060] The difference from Example 1 is that in the enhanced ABS material formulation, the core-shell polymer of styrene-acrylonitrile-butadiene rubber is not used as MBS.

[0061] Comparative Example 5

[0062] The difference from Example 1 is that in the enhanced ABS material formulation, the styrene, N-phenylmaleimide, maleic anhydride terpolymer is not used as a graft, and at the same time, the core-shell polymer of styrene-acrylonitrile-butadiene rubber is not used as MBS.

[0063] Performance Test

[0064] The enhanced ABS materials prepared in Example 1 and Comparative Example 105 were used as specimens for performance testing respectively, and the test results are shown in Table 1;

[0065] Table 1

[0066]

[0067] It can be seen from the test results in Table 1 that compared with Comparative Examples 1-5, the enhanced ABS material prepared in Example 1 is superior to Comparative Examples 1-5 in terms of three properties: impact strength, glossiness, and flexural modulus;

[0068] Among them, as can be seen from Table 1, for the ABS prepared by the bulk method, the ABS prepared by the emulsion method, the terpolymer of styrene, N-phenylmaleimide, and maleic anhydride as the graft, and the core-shell polymer of styrene-acrylonitrile-butadiene rubber as the MBS can all significantly improve the rigidity strength of the reinforced ABS material; the ABS prepared by the emulsion method and the core-shell polymer of styrene-acrylonitrile-butadiene rubber as the MBS can significantly reduce the gloss of the prepared reinforced ABS material; the ABS prepared by the bulk method, the ABS prepared by the emulsion method, and the use of the terpolymer of styrene, N-phenylmaleimide, and maleic anhydride as the graft can all improve the flexural modulus of the reinforced ABS material. Therefore, a low-gloss and high-modulus reinforced ABS material can be obtained by the method of Example 1.

[0069] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A production process of a low-gloss and high-modulus reinforced ABS material, characterized in that, It includes the following steps: Step 1: Weigh the main materials and auxiliary materials required for the enhanced ABS material according to the formula; Step 2: Add the main materials and auxiliary materials obtained by weighing in Step 1 to a stirring device respectively and stir until evenly mixed to obtain a mixed material; Step 3: Extrude the mixed material obtained in Step 2 in a screw extruder; Step 4: Cool the strip-shaped material processed by the screw extruder in Step 3 with water, pelletize and dry it in sequence to obtain the enhanced ABS material.

2. The production process of a low-gloss and high-modulus reinforced ABS material according to claim 1, characterized in that, In Step 1, the main materials of the enhanced ABS material include the following raw materials by weight: 55 - 70 parts of ABS; 3 - 8 parts of talcum powder; 9 - 24 parts of calcium carbonate; 2 - 7 parts of graft; 3 - 8 parts of MBS; The rest is additives.

3. The production process of an enhanced ABS material with low gloss and high modulus according to claim 2, characterized in that, In the enhanced ABS material, the ABS is composed of ABS-a and ABS-b, and the ratio of ABS-a to ABS-b is 31:

30.

4. The production process of an enhanced ABS material with low gloss and high modulus according to claim 2, characterized in that, The additives specifically include the following raw materials by weight: 6 - 16 parts of heat-resistant agent; 0.6 - 1.6 parts of coupling agent; 1.2 - 3.2 parts of antioxidant; 3 - 8 parts of lubricant; 4.8 - 12.8 parts of black masterbatch.

5. The production process of an enhanced ABS material with low gloss and high modulus according to claim 1, characterized in that, In Step 3, a twin-screw extruder is used for the extrusion processing of the mixed material, and the barrel temperature of the twin-screw extruder is controlled at 220°C - 250°C.

6. The production process of a low-gloss and high-modulus reinforced ABS material according to claim 2, characterized in that, In the main materials of the enhanced ABS material, the graft is a terpolymer of styrene, N-phenylmaleimide and maleic anhydride.

7. The production process of a low-gloss and high-modulus reinforced ABS material according to claim 2, characterized in that, In the main materials of the enhanced ABS material, MBS is a core-shell polymer of styrene-acrylonitrile-butadiene rubber.

8. An enhanced ABS material with low gloss and high modulus, characterized in that, A low-gloss and high-modulus enhanced ABS material obtained by using the production process of a low-gloss and high-modulus enhanced ABS material according to any one of claims 1 - 7.

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