Mineral reinforced PC / ABS alloy with good appearance and high performance and its manufacturing method

Abstract

The present invention provides a mineral-reinforced PC / ABS alloy with excellent appearance and high performance, and a method for manufacturing the same. The alloy contains 40-70 parts PC resin, 5-25 parts ABS resin, 15-40 parts ABS masterbatch, 2-5 parts toughening agent, 0.5-5 parts compatibilizer, 0.1-2 parts antioxidant, and 0.1-2 parts lubricant. During manufacturing, the PC resin, ABS resin, ABS masterbatch, compatibilizer, toughening agent, antioxidant, and lubricant are mixed, and the resulting mixture is kneaded, melted, extruded, and granulated in a twin-screw extruder to obtain the alloy. The present invention uses an anti-dripping agent to form a fiber network in the ABS mineral masterbatch, which reduces the mineral's tendency to flow and precipitate on the surface during PC / ABS injection molding and reduces the degradation reaction between the mineral and PC, thereby obtaining a mineral-reinforced PC / ABS alloy with excellent appearance and high performance.

Description

[Technical Field]

[0001] The present invention relates to the field of polymeric materials, and more particularly to a mineral-reinforced PC / ABS alloy with good appearance and high performance, and a method for manufacturing the same. [Background technology]

[0002] PC / ABS alloys have excellent mechanical and thermal properties and are currently widely used in automobiles, home appliances, digital products, and other fields. In particular, in recent years, the performance of automobile interior and exterior decoration has become increasingly intelligent, driving demand for PC / ABS alloys with excellent appearance, high performance, and dimensional stability. The linear expansion coefficient is an indicator of a material's dimensional stability. While a low linear expansion coefficient can be achieved by filling mineral and glass fibers, the anisotropy of glass fibers can lead to problems such as warping and fiber lifting. Isotropic mineral-reinforced PC / ABS can simultaneously meet the requirements of excellent dimensional stability and appearance performance.

[0003] Taking automobiles as an example, with the current increasing demand for larger displays and larger tail fins, the requirements for a low coefficient of linear expansion are becoming increasingly strict. To meet the dimensional requirements, it is necessary to increase the compounding ratio of mineral-filled PC / ABS alloys. However, due to the poor compatibility between inorganic minerals and PC and ABS, a high content of inorganic minerals can cause aggregation, adversely affecting the appearance of the material, such as mineral precipitation. Furthermore, the Mg content of inorganic minerals can cause 2+ , Fe 3+ , Ca 2+ Alkali metal ions such as these significantly accelerate the deterioration of PC and affect the overall performance of the material. Conventional techniques for improving the performance of PC / ABS alloys have only improved the compatibility between the mineral and the substrate through mineral masterbatch or mineral modification, but these have only limited effectiveness. Summary of the Invention

[0004] SUMMARY OF THE INVENTION The object of the present invention is to provide a mineral reinforced PC / ABS alloy with good appearance and high performance, and a manufacturing method thereof, in order to overcome the above-mentioned deficiencies in the prior art.

[0005] The object of the present invention can be achieved by the following technical means.

[0006] The present invention comprises, in parts by weight: 40 to 70 parts PC resin, 5 to 25 parts ABS resin, 15-40 parts ABS masterbatch, 0.5 to 5 parts of a compatibilizer; 2 to 5 parts of a strengthening agent; 0.1 to 2 parts of an antioxidant; and 0.1 to 2 parts of a lubricant, to provide a mineral-reinforced PC / ABS alloy with good appearance and high performance.

[0007] In one embodiment of the present invention, the PC resin is a bisphenol A polycarbonate resin, and has a melt index of 8 to 20 g / 10 min under the conditions of 300° C. / 1.2 kg.

[0008] In one embodiment of the present invention, the ABS resin has a weight average molecular weight of 120,000 to 160,000 g / mol, a rubber content of 5 to 30 wt.%, an acrylonitrile content of 20 to 30 wt.%, a styrene content of 40 to 70 wt.%, and a melt index of 10 to 15 g / min under conditions of 220°C x 10 kg.

[0009] In one embodiment of the present invention, the ABS masterbatch is a composite of acrylonitrile-butadiene-styrene ABS, talc, a lubricant, an antioxidant, a compatibilizer, and an anti-dripping agent. Each component is weighed in parts by weight. The ABS resin has a weight average molecular weight of 120,000 to 160,000 g / mol and is 40 to 70 parts by weight. The talc is 25 to 55 parts. The lubricant content is 0.1 to 1 part. The antioxidant content is 0.1 to 2 parts. The compatibilizer content is 1 to 5 parts. The anti-dripping agent content is 0.1 to 1.1 parts. These addition ratios were obtained through internal testing. If the amount of anti-dripping agent added is too small, the degree of fiber networking in the alloy will be low and will be insufficient to weaken the mineral flow and precipitation. If the amount of anti-dripping agent added is too large, the degree of fiber networking in the alloy will be high, the viscosity of the alloy system will increase rapidly, causing the screw to slip and making it difficult to normally extrude the barrel particles.

[0010] The antioxidant is one or more of pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 3-(3,5-di-tert-butyl-4-hydroxyphenyl)stearyl propionate, tris(2,4-di-tert-butylphenyl)phosphite, and cyclic neopentanetetraylbis(octadecylphosphite). The lubricant is one or more of silicone oil, silicone powder, pentaerythritol ester, and ethylene bisstearamide. The compatibilizer is one or more of styrene-acrylonitrile-glycidyl acrylate, ethylene-vinyl acetate copolymer-functionalized maleic anhydride, and styrene-maleic anhydride-acrylonitrile. The anti-drip agent is one or more of polytetrafluoroethylene pure powder, polytetrafluoroethylene emulsion, and polytetrafluoroethylene coating.

[0011] As one embodiment of the present invention, the method for producing the ABS masterbatch includes: Step (1) of mixing ABS resin, talc, lubricant, antioxidant, compatibilizer, and anti-dripping agent in a blending ratio with a mixer for 5 to 30 minutes; and step (2) of feeding the mixture obtained in step (1) into a twin-screw extruder, adjusting the barrel temperature to 180 to 240°C, adjusting the screw rotation speed to 200 to 600 rpm, and granulating the mixture to obtain an ABS masterbatch.

[0012] In one embodiment of the present invention, the twin-screw extruder includes 10 temperature control zones, the temperatures of temperature control zones 1 and 2 being 180 to 210°C, the temperatures of temperature control zones 3 and 4 being 190 to 220°C, the temperatures of temperature control zones 5 and 6 being 190 to 220°C, the temperatures of temperature control zones 7 and 8 being 190 to 230°C, and the temperatures of temperature control zones 9 and 10 being 200 to 240°C.

[0013] In one embodiment of the present invention, the compatibilizer is one or more of styrene-acrylonitrile-glycidyl acrylate, ethylene-vinyl acetate copolymer-functionalized maleic anhydride, styrene-maleic anhydride-acrylonitrile.

[0014] In one embodiment of the present invention, the anti-drip agent is one or more of polytetrafluoroethylene pure powder, polytetrafluoroethylene emulsion, and polytetrafluoroethylene coating.

[0015] In one embodiment of the present invention, the toughening agent is one or more of methyl methacrylate, butadiene, styrene terpolymer, acrylic ester copolymer.

[0016] In one embodiment of the present invention, the antioxidant is one or more of pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], stearyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, tris(2,4-di-tert-butylphenyl)phosphite, and cyclic neopentanetetraylbis(octadecylphosphite).

[0017] In one embodiment of the present invention, the lubricant is one or more of silicone oil, silicone powder, pentaerythritol ester, and ethylene bisstearamide.

[0018] The present invention further provides a method for producing a mineral-reinforced PC / ABS alloy with good appearance and high performance, which comprises mixing the PC resin, ABS resin, ABS masterbatch, compatibilizer, toughening agent, antioxidant, and lubricant, adding the mixture to a twin-screw extruder, melt-kneading, and extruding the mixture, controlling the extrusion temperature at 220-260°C, the screw rotation speed at 200-500 rpm, and the pressure at 2-3 MPa, and then underwater pelletizing and drying to obtain a product.

[0019] In one embodiment of the present invention, the mixing is carried out using a high-speed mixer, the rotation speed of the high-speed mixer is 100 to 300 r / min, and the mixing time is 10 to 30 minutes.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1) The present invention uses an anti-dripping agent to form a fiber network in the ABS mineral masterbatch, which reduces the mineral's tendency to flow and precipitate on the surface during PC / ABS injection molding and reduces the degradation reaction between the mineral and PC, resulting in a mineral-reinforced PC / ABS alloy with good appearance and high performance.

[0022] 2) The mineral-reinforced PC / ABS alloy with good appearance and high performance produced by the present invention is particularly suitable for parts with complex structures and multi-point adhesive molds. For home appliances and automobiles with complex shapes, it not only does not affect the overall performance of the material, but also allows the production of products with excellent appearance. DETAILED DESCRIPTION OF THE INVENTION

[0023] The present invention will be described in detail below with reference to examples. The following examples are intended to help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any way. However, those skilled in the art may make some adjustments and improvements without departing from the concept of the present invention. All of these fall within the scope of protection of the present invention.

[0024] The raw materials used in the comparative examples and examples are specifically as follows.

[0025] Bisphenol A polycarbonate having a weight average molecular weight of 40,000 to 80,000 g / mol, specifically S-3000F manufactured by Mitsubishi Gas Corporation, with a melt index of 17 g / 10 min under the conditions of 300°C x 1.2 kg, is used. ABS resin having a weight average molecular weight of 120,000 to 160,000 g / mol, a rubber content of 5 to 30%, an acrylonitrile content of 20 to 30%, and a styrene content of 40 to 70%, specifically ABS8434 manufactured by Takahashi Petrochemicals Co., Ltd., is used. The talc was manufactured in-house, the talc was commercially available PT-559 with a D50 of 2.6 to 3.2 μm, the compatibilizer was SAG-001 manufactured by Nantong Rishon Co., Ltd., the reinforcing agent was EM500 manufactured by LG Co., Ltd., the anti-dripping agent was commercially available SN3300B7 with a SAN coating layer, the antioxidant was IRGANOX1010 manufactured by BASF (the antioxidant in Table 2), the lubricant was PETS (pentaerythritol tetrastearate), and the antioxidants were 168 and 245 (Table 1).

[0026] The ABS masterbatch is a composite of acrylonitrile-butadiene-styrene ABS, talc, lubricant, antioxidant, compatibilizer, and anti-dripping agent, each component being weighed in parts by weight. The resulting masterbatches are ABS Masterbatch 0#, ABS Masterbatch 1#, ABS Masterbatch 2#, and ABS Masterbatch 3#, respectively, as shown in Table 1 below.

[0027] The manufacturing method of the above ABS masterbatch is as follows: Step (1) of mixing the ABS resin, talc, lubricant, antioxidant, compatibilizer, and anti-dripping agent in Table 1 in parts by weight in a mixer for 10 minutes; and step (2) of feeding the mixture obtained in step (1) into a twin-screw extruder, setting the barrel temperatures so that the temperatures of temperature control zones 1 and 2 are 180°C, the temperatures of temperature control zones 3 and 4 are 200°C, the temperatures of temperature control zones 5 and 6 are 210°C, the temperatures of temperature control zones 7 and 8 are 230°C, and the temperatures of temperature control zones 9 and 10 are 240°C, setting the screw rotation speed to 400 rpm, and granulating to obtain an ABS masterbatch.

[0028] [Table 1]

[0029] In Table 1 and Table 2, the selection of lubricants, compatibilizers, and anti-drip agents is the same.

[0030] The manufacturing method of PC / ABS alloy is as follows: Step (1) of uniformly mixing the substances in Table 2 in parts by weight in a high-speed mixer for 10 minutes, and setting the rotation speed of the high-speed mixer to 150 r / min; and step (2) feeding the mixture obtained in step (1) into a twin-screw extruder, setting the barrel temperatures so that the temperatures of temperature control zones 1 and 2 are 220°C, the temperatures of temperature control zones 3 and 4 are 230°C, the temperatures of temperature control zones 5 and 6 are 240°C, the temperatures of temperature control zones 7 and 8 are 250°C, and the temperatures of temperature control zones 9 and 10 are 260°C, and setting the screw rotation speed to 400 rpm, and granulating to obtain a PC / ABS alloy.

[0031] [Table 2]

[0032] Performance Detection The composition particles prepared in the above Comparative Examples and Examples were thoroughly dried, and then splines were obtained by injection molding to carry out various performance tests. Large high-gloss plates were also obtained by injection molding to compare the appearance effects.

[0033] [Table 3] Note: The more "☆" there are, the better the injection molding appearance.

[0034] The test results of each comparative example and example are as shown in Table 3. The tensile strength was tested according to the ISO527 standard, with a spline dimension (mm) of 135 x 10 x 4 and a tensile speed of 5 mm / min. The bending performance was tested according to the ISO178 standard, with a spline dimension (mm) of 80 x 10 x 4 and a tensile speed of 2 mm / min. The notched impact strength was tested according to the ISO179 standard, with a spline dimension (mm) of 80 x 10 x 4 and a tensile speed of 2 mm / min. The spline type is Type A, the remaining width at the bottom of the notch is 8±0.2 mm, the test conditions are 5.5 J and 23°C, the heat distortion temperature is tested according to the ISO 75 standard, the spline dimensions (mm) are 80 x 10 x 4, the test conditions are 1.80 MPa and 120°C / h, and the appearance is evaluated by obtaining a large high-gloss plate by injection molding and evaluating defects such as mineral precipitation on the exterior surface. The dimensions of the large high-gloss plate (mm) are 100 x 90 x 3.

[0035] As can be seen from a comparison between Comparative Example 1 and Comparative Example 2, the two-stage method (first producing an ABS masterbatch and then producing a PC / ABS alloy) resulted in a notched impact strength of 15 to 28.1 KJ / m compared to the one-stage method. 2 The appearance of the injection molded product was also relatively good. Comparing Comparative Example 1 with Examples 1, 2, and 3, it can be seen that when the amount of the anti-dripping agent in the ABS masterbatch was increased to 0.1, 0.6, and 1.1 parts, respectively, the impact strength was improved to 28.1 KJ / m 2 to 36.4KJ / m 2 and 38.1KJ / m 2 After increasing to 26.2KJ / m 2 The appearance of the injection molded product gradually improves, and then the appearance deteriorates. Comparing Comparative Example 3 with Examples 4 and 5, it can be seen that when the PC content is high, both the appearance of the injection molded product and the impact performance are poor. In order to obtain a product with better appearance and performance, it is preferable to use 40 to 70 parts of PC resin, 5 to 25 parts of ABS resin, 15 to 40 parts of ABS masterbatch, 2 to 5 parts of reinforcing agent, 0.5 to 5 parts of compatibilizer, 0.1 to 2 parts of antioxidant, and 0.1 to 2 parts of lubricant.

[0036] Although specific examples of the present invention have been described above, it should be understood that the present invention is not limited to the above specific embodiments, and that those skilled in the art can make various changes or modifications within the scope of the claims without affecting the essential content of the present invention.

Claims

1. In parts by weight, 40 to 70 parts of PC resin; 5 to 25 parts of ABS resin; 15 to 40 parts of ABS masterbatch; 0.5 to 5 parts of a compatibilizer; 2 to 5 parts of a strengthening agent; 0.1 to 2 parts of an antioxidant; 0.1 to 2 parts of a lubricant; A mineral reinforced PC / ABS alloy.

2. The PC resin is a bisphenol A polycarbonate resin having a melt index of 8 to 20 g / 10 min under conditions of 300°C / 1.2 kg.

2. The mineral reinforced PC / ABS alloy of claim 1.

3. The ABS resin has a weight average molecular weight of 120,000 to 160,000 g / mol, a rubber content of 5 to 30 wt. %, an acrylonitrile content of 20 to 30 wt. %, a styrene content of 40 to 70 wt. %, and a melt index of 10 to 15 g / min under conditions of 220°C x 10 kg.

2. The mineral reinforced PC / ABS alloy of claim 1.

4. The ABS masterbatch is a composite of acrylonitrile-butadiene-styrene ABS, talc, a lubricant, an antioxidant, a compatibilizer, and an anti-dripping agent; The ABS resin has a weight average molecular weight of 120,000 to 160,000 g / mol and is present in an amount of 40 to 70 parts by weight, the talc is present in an amount of 25 to 55 parts, the lubricant is present in an amount of 0.1 to 1 part, the antioxidant is present in an amount of 0.1 to 2 parts, the compatibilizer is present in an amount of 1 to 5 parts, and the anti-dripping agent is present in an amount of 0.1 to 1.1 parts.

2. The mineral reinforced PC / ABS alloy of claim 1.

5. the compatibilizer is one or more of styrene-acrylonitrile-glycidyl acrylate, ethylene-vinyl acetate copolymer-functionalized maleic anhydride, styrene-maleic anhydride-acrylonitrile; 2. The mineral reinforced PC / ABS alloy of claim 1.

6. the toughening agent is one or more of methyl methacrylate, butadiene, styrene terpolymer, acrylic ester copolymer; 2. The mineral reinforced PC / ABS alloy of claim 1.

7. the antioxidant is one or more of pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], stearyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, tris(2,4-di-tert-butylphenyl)phosphite, cyclic neopentanetetraylbis(octadecylphosphite); the lubricant is one or more of silicone oil, silicone powder, paraffin, stearic acid, butyl stearate, oleic acid amide, and ethylene bisstearic acid amide; 2. The mineral reinforced PC / ABS alloy of claim 1.

8. A method for producing a mineral reinforced PC / ABS alloy according to any one of claims 1 to 7, comprising the steps of: The PC resin, ABS resin, ABS masterbatch, compatibilizer, reinforcing agent, antioxidant and lubricant are mixed, and the mixture is added to a twin-screw extruder and melt-kneaded and extruded, controlling the extrusion temperature to 220-260°C, controlling the screw rotation speed to 200-500 rpm, controlling the pressure to 2-3 MPa, and then underwater pelletizing and drying to obtain a product. A method for producing a mineral reinforced PC / ABS alloy, comprising:

9. The mixing is carried out in a high speed mixer, The rotation speed of the high-speed mixer is 100 to 300 r / min. The mixing time is 10 to 30 minutes.

9. The method of claim 8, wherein the mineral reinforced PC / ABS alloy is a tungsten alloy.

10. The method for producing the ABS masterbatch comprises: Step (1) mixing ABS resin, talc, lubricant, antioxidant, compatibilizer, and anti-dripping agent in a blending ratio of 40 to 70 parts by weight of ABS resin, 25 to 55 parts by weight of talc, 0.1 to 1 part by weight of lubricant, 0.1 to 2 parts by weight of antioxidant, 1 to 5 parts by weight of compatibilizer, and 0.1 to 1.1 parts by weight of anti-dripping agent in a mixer for 5 to 30 minutes; and step (2) of feeding the mixture obtained in step (1) into a twin-screw extruder, adjusting the barrel temperature to 180-240°C, adjusting the screw rotation speed to 200-600 rpm, and granulating the mixture to obtain an ABS masterbatch.

9. The method of claim 8, wherein the mineral reinforced PC / ABS alloy is a tungsten alloy.

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