High-rigidity PC / ABS composite material and preparation method thereof

Abstract

The invention discloses a high-rigidity PC / ABS composite material and a preparation method thereof. The preparation method comprises the following steps: (1) adding mineral powder into a titanate coupling agent diluted by ethanol, uniformly stirring, standing at room temperature for 4-5 hours, drying at 60-80 DEG C, cooling, crushing again and sieving to obtain mineral powder treated by the titanate coupling agent; pC, ABS, the mineral powder treated by the titanate coupling agent and 3, 4-dimethyl pyrazole phosphate DMPP are added into a mixing machine to be fully mixed, the mixture is extruded through a co-rotating twin-screw extruder and dried for 1-2 h in a hot air environment at the temperature of 100 + / -2 DEG C, and the high-rigidity PC / ABS composite material is obtained. The preparation method is simple, the materials are easy to obtain, the prepared specially modified composite material not only combines excellent characteristics of the PC plastic and the ABS, but also has greatly improved material rigidity, and has a good market prospect.

Description

Technical Field

[0001] The invention belongs to the technical field of PC / ABS, and in particular relates to a high-rigidity PC / ABS material and a preparation method thereof. Background Art

[0002] PC is polycarbonate, which is a thermoplastic with the advantages of good rigidity and good mechanical properties. ABS is a graft copolymer or terpolymer of acrylonitrile, butadiene and styrene. This plastic is also a thermoplastic with the advantages of high toughness, good fluidity and easy molding. The PC / ABS alloy prepared from PC and ABS combines the excellent properties of both PC and ABS materials and is widely used in the fields of automobiles, household appliances, and structural functional parts of electronic products. However, in many specific scenarios and specific products, the existing PC / ABS alloys cannot meet the performance requirements, especially for thinned profiles, which need to maintain the performance at conventional wall thickness in the thin-walled profile design. Therefore, improving the rigidity of PC / ABS composite materials has broad market application prospects. Summary of the invention

[0003] In order to overcome the insufficient rigidity of the existing materials and maintain the original material processing method, the purpose of the present invention is to provide a high-rigidity PC / ABS material and a preparation method thereof.

[0004] The present invention is achieved in this way: a high-rigidity PC / ABS composite material, the composite material comprises the following components by mass: 30 to 60 parts of PC, 10 to 40 parts of ABS, 30 to 40 parts of mineral powder treated with a titanate coupling agent, and 0.4 to 0.6 parts of 3,4-dimethylpyrazole phosphate DMPP.

[0005] Preferably, the composite material comprises the following components in parts by mass: 60 parts of PC, 10 parts of ABS, 30 parts of mineral powder treated with a titanate coupling agent, and 0.6 parts of 3,4-dimethylpyrazole phosphate DMPP.

[0006] Preferably, the mineral powder is selected from at least one of talc powder, wollastonite powder and silicon carbide powder.

[0007] Preferably, the average particle size of the mineral powder is 1 to 3 μm.

[0008] Preferably, the titanate coupling agent is selected from any one of isopropyl tristearate titanate, isopropyl distearate acyloxyaluminate, isopropoxy tri(dioctyl pyrophosphate acyloxy) titanate, and isopropyl trioleate acyloxy titanate.

[0009] Preferably, in the mineral powder treated with the titanate coupling agent, the mass ratio of the titanate coupling agent to the mineral powder is 0.005:1-2.

[0010] The present invention further discloses a method for preparing the composite material, which comprises the following steps:

[0011] (1) adding the mineral powder to the titanate coupling agent diluted with ethanol, stirring evenly, standing at room temperature for 4 to 5 hours, drying at 60 to 80° C., cooling, and re-crushing and sieving to obtain the mineral powder treated with the titanate coupling agent;

[0012] (2) PC, ABS, the mineral powder treated with the titanate coupling agent and 3,4-dimethylpyrazole phosphate DMPP are added to a mixer and mixed thoroughly, extruded through a co-rotating twin-screw extruder at an extrusion temperature of 260±2° C., and dried in a hot air environment at 100±2° C. for 1 to 2 hours to obtain a high-rigidity PC / ABS composite material.

[0013] Compared with the shortcomings and deficiencies of the prior art, the present invention has the following beneficial effects: the preparation method of the present invention is simple, the mineral powder filling pre-treated raw materials are all commercially available materials with controllable costs and easy to obtain, and the prepared specially modified composite material not only combines the excellent properties of PC and ABS, but also greatly improves the rigidity of the material, and has good market prospects. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0015] Example 1

[0016] (1) 1 kg of mineral powder (talcum powder) with a particle size of 1 to 3 μm and 0.005 kg of titanate coupling agent (isopropyl tristearate titanate) are added to 1 kg of anhydrous ethanol, stirred evenly, left to stand at room temperature for 4 hours, dried at 60° C., cooled, and crushed and sieved again to obtain a mineral powder treated with a titanate coupling agent with a particle size of 1 to 3 μm;

[0017] (2) 1.5 kg PC, 0.25 kg ABS, 0.75 kg mineral powder treated with titanate coupling agent, and 0.01 kg 3,4-dimethylpyrazole phosphate DMPP were added into a mixer and mixed thoroughly. The mixture was extruded through a co-rotating twin-screw extruder at an extrusion temperature of 260 ± 2 °C and dried in a hot air environment at 100 ± 2 °C for 2 h to obtain a high-rigidity PC / ABS composite material 1.

[0018] Example 2

[0019] (1) 2 kg of mineral powder (talcum powder) with a particle size of 1 to 3 μm and 0.005 kg of titanate coupling agent (isopropyl distearate acyloxyaluminate) were added to 1.5 kg of anhydrous ethanol, stirred evenly, left to stand at room temperature for 4 hours, dried and cooled at 80° C., and crushed and sieved again to obtain a mineral powder treated with a titanate coupling agent with a particle size of 1 to 3 μm;

[0020] (2) 0.75 kg PC, 1 kg ABS, 1 kg mineral powder treated with titanate coupling agent and 0.015 kg 3,4-dimethylpyrazole phosphate DMPP were added into a mixer and mixed thoroughly. The mixture was extruded through a co-rotating twin-screw extruder at an extrusion temperature of 260±2°C and dried in a hot air environment at 100±2°C for 1 h to obtain a high-rigidity PC / ABS composite material 2.

[0021] Example 3

[0022] (1) 1.5 kg of mineral powder (silicon carbide powder) with a particle size of 1 to 3 μm and 0.005 kg of titanate coupling agent (isopropoxy tri(dioctyl pyrophosphate acyloxy) titanate) were added to 1.5 kg of anhydrous ethanol, stirred evenly, allowed to stand at room temperature for 5 hours, dried and cooled at 70° C., and crushed and sieved again to obtain a mineral powder treated with a titanate coupling agent with a particle size of 1 to 3 μm;

[0023] (2) 1 kg PC, 0.75 kg ABS, 0.86 kg mineral powder treated with titanate coupling agent and 0.012 kg 3,4-dimethylpyrazole phosphate DMPP were added into a mixer and mixed thoroughly. The mixture was extruded through a co-rotating twin-screw extruder at an extrusion temperature of 260±2°C and dried in a hot air environment at 100±2°C for 1 h to obtain a high-rigidity PC / ABS composite material 3.

[0024] Example 4

[0025] (1) 1.5 kg of mineral powder (wollastonite powder) with a particle size of 1 to 3 μm and 0.005 kg of titanate coupling agent (isopropoxy tri(dioctyl pyrophosphate acyloxy) titanate) were added to 1.5 kg of anhydrous ethanol, stirred evenly, allowed to stand at room temperature for 5 hours, dried at 70° C., cooled, and crushed and sieved again to obtain a mineral powder treated with a titanate coupling agent with a particle size of 1 to 3 μm;

[0026] (2) 1 kg PC, 0.75 kg ABS, 0.85 kg mineral powder treated with titanate coupling agent, and 0.012 kg 3,4-dimethylpyrazole phosphate DMPP were added into a mixer and mixed thoroughly. The mixture was extruded through a co-rotating twin-screw extruder at an extrusion temperature of 260 ± 2 °C and dried in a hot air environment at 100 ± 2 °C for 1 h to obtain a high-rigidity PC / ABS composite material 4.

[0027] Example 5

[0028] (1) 1.5 kg of mineral powder (talcum powder) with a particle size of 1 to 3 μm and 0.005 kg of titanate coupling agent (isopropyl trioleyl titanate) were added to 1.5 kg of anhydrous ethanol, stirred evenly, left to stand at room temperature for 5 hours, dried at 70° C., cooled, and crushed and sieved again to obtain a mineral powder treated with a titanate coupling agent with a particle size of 1 to 3 μm;

[0029] (2) 1 kg PC, 0.75 kg ABS, 0.85 kg mineral powder treated with titanate coupling agent, and 0.012 kg 3,4-dimethylpyrazole phosphate DMPP were added into a mixer and mixed thoroughly. The mixture was extruded through a co-rotating twin-screw extruder at an extrusion temperature of 260 ± 2 °C and dried in a hot air environment at 100 ± 2 °C for 1 h to obtain a high-rigidity PC / ABS composite material 5.

[0030] Comparative Example 1

[0031] 1.5 kg PC, 0.25 kg ABS, 0.75 kg mineral powder and 0.01 kg 3,4-dimethylpyrazole phosphate DMPP were added into a mixer and mixed thoroughly. The mixture was extruded through a co-rotating twin-screw extruder at an extrusion temperature of 260±2°C and dried in a hot air environment at 100±2°C for 2 h to obtain a comparative PC / ABS composite material 1.

[0032] Comparative Example 2

[0033] (1) 1 kg of mineral powder (talcum powder) with a particle size of 1 to 3 μm and 0.005 kg of titanate coupling agent (isopropyl tristearate titanate) are added to 1 kg of anhydrous ethanol, stirred evenly, left to stand at room temperature for 4 hours, dried at 60° C., cooled, and crushed and sieved again to obtain a mineral powder treated with a titanate coupling agent with a particle size of 1 to 3 μm;

[0034] (2) 1.25 kg PC, 0.25 kg ABS, and 0.75 kg mineral powder treated with titanate coupling agent were added into a mixer and mixed thoroughly. The mixture was extruded through a co-rotating twin-screw extruder at an extrusion temperature of 260 ± 2 °C and dried in a hot air environment at 100 ± 2 °C for 2 h to obtain a comparative PC / ABS composite material 2.

[0035] Comparative Example 3

[0036] 1.25 kg PC and 0.25 kg ABS were added into a mixer and mixed thoroughly. The mixture was extruded through a co-rotating twin-screw extruder at an extrusion temperature of 260±2° C. The mixture was dried in a hot air environment at 100±2° C. for 2 h to obtain a comparative PC / ABS composite material 3.

[0037] Effect Example

[0038] The high-rigidity PC / ABS composite materials 3 to 5 in Examples 3 to 5 and the comparative PC / ABS composite materials 1 to 3 in Comparative Examples 1 to 3 were selected for the following performance tests. The notched impact strength was measured according to the method of GB / T1043.1-2008; the flexural modulus was measured according to the method of GB / T9341-2008; the density was measured according to the method of GB / T 4472-2011; and the linear expansion coefficient was measured according to the method of GB / T11357.

[0039] The measurement results are shown in Table 1 below:

[0040] Table 1 Measurement statistical results

[0041]

[0042]

[0043] As shown in Table 1 above, compared with the comparative PC / ABS composite material 1, the mineral powder (talcum powder) in the high-rigidity PC / ABS composite material 3 is pre-treated with a titanate coupling agent, which has a great influence on the performance of the material. This is mainly manifested in that the polarity of the mineral powder changes after the pre-modification treatment of the titanate coupling agent, and the interface properties of the mineral powder surface change, and this change is an important reason for the rigidity of the material to become stronger. In addition, compared with the comparative PC / ABS composite material 2, the addition or not of 3,4-dimethylpyrazole phosphate DMPP in the high-rigidity PC / ABS composite material 3 is also directly related to the performance of the material. In addition, in the absence of 3,4-dimethylpyrazole phosphate DMPP, the performance of the comparative PC / ABS composite material 2 is equivalent to or slightly worse than that of the comparative PC / ABS composite material 1, which indicates that the 3,4-dimethylpyrazole phosphate DMPP and the mineral powder pre-treated with a titanate coupling agent show a synergistic relationship in regulating the material performance, especially the rigidity of the composite material has been greatly improved. After comparing the comparative PC / ABS composite material 3 with the comparative PC / ABS composite material 2 or the comparative PC / ABS composite material 1, it was found that adding 3,4-dimethylpyrazole phosphate DMPP or mineral powder pre-treated with a titanate coupling agent would improve the performance of the PC / ABS material to a certain extent.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-rigidity PC / ABS composite material, characterized in that: The composite material comprises the following components in parts by mass: 30 to 60 parts of PC, 10 to 40 parts of ABS, 30 to 40 parts of mineral powder treated with a titanate coupling agent, and 0.4 to 0.6 parts of 3,4-dimethylpyrazole phosphate DMPP.

2. The composite material according to claim 1, characterized in that The composite material includes the following components by mass: 60 parts of PC, 10 parts of ABS, 30 parts of mineral powder treated with a titanate coupling agent, and 0.6 parts of 3,4-dimethylpyrazole phosphate DMPP.

3. The composite material according to claim 1, characterized in that The mineral powder is selected from at least one of talc powder, wollastonite powder and silicon carbide powder.

4. The composite material according to claim 1, characterized in that The average particle size of the mineral powder is 1 to 3 μm.

5. The composite material according to claim 1, characterized in that The titanate coupling agent is selected from any one of isopropyl tristearate titanate, isopropyl distearate acyloxyaluminate, isopropoxy tris(dioctyl pyrophosphate acyloxy) titanate, and isopropyl trioleate acyloxy titanate.

6. The composite material according to claim 1, characterized in that In the mineral powder treated with the titanate coupling agent, the mass ratio of the titanate coupling agent to the mineral powder is 0.005:1-2.

7. The method for preparing the composite material according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: (1) adding the mineral powder to the titanate coupling agent diluted with ethanol, stirring evenly, standing at room temperature for 4 to 5 hours, drying at 60 to 80° C., cooling, and re-crushing and sieving to obtain the mineral powder treated with the titanate coupling agent; (2) PC, ABS, the mineral powder treated with the titanate coupling agent and 3,4-dimethylpyrazole phosphate DMPP are added to a mixer and mixed thoroughly, extruded through a co-rotating twin-screw extruder at an extrusion temperature of 260±2° C., and dried in a hot air environment at 100±2° C. for 1 to 2 hours to obtain a high-rigidity PC / ABS composite material.

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