ULTRALOW-GLOSS PC/ABS RESIN COMPOSITION AND PREPARATION METHOD THEREOF

Abstract

An ultralow-gloss polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) resin composition and a preparation method thereof are provided. The composition includes the following components: 40-80 parts by weight of bisphenol A polycarbonate, 19-40 parts by weight of acrylonitrile-butadiene-styrene graft copolymer, 1-20 parts by weight of ultralow-gloss toughening modifier, and 0.1-5 parts of processing aid. The ultralow-gloss toughening modifier includes the following components: post-treated polymeric microspheres, a low-temperature toughening agent, a coupling agent, and aid. The preparation method of the composition includes: fully mixing all components in a high-speed mixer to obtain a mixture; feeding the mixture into a main feed port from a twin-screw extruder, melting, extruding, cooling, drying, and pelletizing. The PC/ABS resin composition prepared by the present invention has extremely low gloss level and excellent impact toughness, and it can be applied in scenarios requiring low temperature resistance and low gloss level.

Claims

1. An ultralow-gloss polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) resin composition, comprising the following first components: TABLE-US-00009 bisphenol A polycarbonate 40-80 parts by weight, acrylonitrile-butadiene-styrene graft 19-40 parts by weight, copolymer an ultralow-gloss toughening modifier 1-20 parts by weight, and a first processing aid 0.1-5 parts by weight.

2. The ultralow-gloss PC/ABS resin composition according to claim 1, wherein the bisphenol A polycarbonate has a relative molecular weight of 17,000-30,000 g/mol, the bisphenol A polycarbonate has a glass transition temperature of 140-150° C., and the bisphenol A polycarbonate has a terminal hydroxyl group content of 10%-20%.

3. The ultralow-gloss PC/ABS resin composition according to claim 1, wherein the acrylonitrile-butadiene-styrene graft copolymer has a butadiene content of 10-55% by weight, the acrylonitrile-butadiene-styrene graft copolymer has an acrylonitrile content of 15-32% by weight, and the acrylonitrile-butadiene-styrene graft copolymer has a styrene content of 30-70% by weight; and the acrylonitrile-butadiene-styrene graft copolymer has a weight average molecular weight of 100,000-180,000 g/mol.

4. The ultralow-gloss PC/ABS resin composition according to claim 1, wherein the ultralow-gloss toughening modifier comprises the following second components: TABLE-US-00010 post-treated polymer microspheres 50-80 parts by weight, a low-temperature toughening agent 15-30 parts by weight, a coupling agent 5-20 parts by weight, and a second processing aid 0.1-5 parts by weight.

5. The ultralow-gloss PC/ABS resin composition according to claim 4, wherein the post-treated polymer microspheres are high performance special polymer microspheres, and the post-treated polymer microspheres are at least one selected from the group consisting of polytetrafluoroethylene (PTFE) microspheres, polyamide-imide (PAI) microspheres, polyetherimide (PEI) microspheres, and poly(p-phenylene terephthalamide) (PPTA) microspheres; wherein the post-treated polymer microspheres have a diameter of 0.8-2μ.

6. The ultralow-gloss PC/ABS resin composition according to claim 4, wherein the post-treated polymer microspheres are polymer microspheres, wherein the polymer microspheres are obtained after performing a plasma treatment on untreated polymer microspheres.

7. The ultralow-gloss PC/ABS resin composition according to claim 6, wherein the plasma treatment includes etching the untreated polymer microspheres through a plasma reactor under a reactive gas atmosphere by 0.5-2.0 wt % to obtain etched microspheres, and holding the etched microspheres in air for 1-5 min.

8. The ultralow-gloss PC/ABS resin composition according to claim 4, wherein the low-temperature toughening agent is a non-crosslinking reactive toughening agent, and the coupling agent is a silane coupling agent.

9. The ultralow-gloss PC/ABS resin composition according to claim 8, wherein the non-crosslinking reactive toughening agent is at least one selected from the group consisting of EMA-g-MAH, EMA-g-GMA, EBA-g-MAH, EBA-g-GMA, and thermoplastic styrene elastomer grafting active functional groups; wherein the silane coupling agent is at least one selected from the group consisting of an amino functional silane coupling agent, a vinyl functional silane coupling agent, an epoxy functional silane coupling agent, and a methacryloyl functional silane coupling agent.

10. The ultralow-gloss PC/ABS resin composition according to claim 4, wherein a preparation method of the ultralow-gloss toughening modifier comprises the following steps: weighing the second components in parts by weight, thoroughly mixing the second components uniformly and homogenizing the second components, to obtain the ultralow-gloss toughening modifier.

11. A method for preparing the ultralow-gloss PC/ABS resin composition according to claim 1, comprising the following steps: step 1, preparing materials according to the following first components and contents: 40-80 parts by weight of the bisphenol A polycarbonate, 19-40 parts by weight of the acrylonitrile-butadiene-styrene graft copolymer, 1-20 parts by weight of ultralow-gloss toughening modifier, and 0.1-5 parts by weight of the first processing aid; step 2, stirring and mixing the materials in step 1 in a high-speed mixer to obtain mixed materials, and extruding and granulating the mixed materials to obtain the ultralow-gloss PC/ABS resin composition.

12. The ultralow-gloss PC/ABS resin composition according to claim 5, wherein a preparation method of the ultralow-gloss toughening modifier comprises the following steps: weighing the second components in parts by weight, thoroughly mixing the second components uniformly and homogenizing the second components, to obtain the ultralow-gloss toughening modifier.

13. The ultralow-gloss PC/ABS resin composition according to claim 6, wherein a preparation method of the ultralow-gloss toughening modifier comprises the following steps: weighing the second components in parts by weight, thoroughly mixing the second components uniformly and homogenizing the second components, to obtain the ultralow-gloss toughening modifier.

14. The ultralow-gloss PC/ABS resin composition according to claim 7, wherein a preparation method of the ultralow-gloss toughening modifier comprises the following steps: weighing the second components in parts by weight, thoroughly mixing the second components uniformly and homogenizing the second components, to obtain the ultralow-gloss toughening modifier.

15. The ultralow-gloss PC/ABS resin composition according to claim 8, wherein a preparation method of the ultralow-gloss toughening modifier comprises the following steps: weighing the second components in parts by weight, thoroughly mixing the second components uniformly and homogenizing the second components, to obtain the ultralow-gloss toughening modifier.

16. The ultralow-gloss PC/ABS resin composition according to claim 9, wherein a preparation method of the ultralow-gloss toughening modifier comprises the following steps: weighing the second components in parts by weight, thoroughly mixing the second components uniformly and homogenizing the second components, to obtain the ultralow-gloss toughening modifier.

17. The method for preparing the ultralow-gloss PC/ABS resin composition according to claim 11, wherein the bisphenol A polycarbonate has a relative molecular weight of 17,000-30,000 g/mol, the bisphenol A polycarbonate has a glass transition temperature of 140-150° C., and the bisphenol A polycarbonate has a terminal hydroxyl group content of 10%-20%.

18. The method for preparing the ultralow-gloss PC/ABS resin composition according to claim 11, wherein the acrylonitrile-butadiene-styrene graft copolymer has a butadiene content of 10-55% by weight, the acrylonitrile-butadiene-styrene graft copolymer has an acrylonitrile content of 15-32% by weight, and the acrylonitrile-butadiene-styrene graft copolymer has a styrene content of 30-70% by weight; and the acrylonitrile-butadiene-styrene graft copolymer has a weight average molecular weight of 100,000-180,000 g/mol.

19. The method for preparing the ultralow-gloss PC/ABS resin composition according to claim 11, wherein the ultralow-gloss toughening modifier comprises the following second components: TABLE-US-00011 post-treated polymer microspheres 50-80 parts by weight, a low-temperature toughening agent 15-30 parts by weight, a coupling agent 5-20 parts by weight, and a second processing aid 0.1-5 parts by weight.

20. The method for preparing the ultralow-gloss PC/ABS resin composition according to claim 19, wherein the post-treated polymer microspheres are high performance special polymer microspheres, and the post-treated polymer microspheres are at least one selected from the group consisting of polytetrafluoroethylene (PTFE) microspheres, polyamide-imide (PAI) microspheres, polyetherimide (PEI) microspheres, and poly(p-phenylene terephthalamide) (PPTA) microspheres; wherein the post-treated polymer microspheres have a diameter of 0.8-2μ.

Description

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The present invention will be described in detail below in combination with examples. The following examples are intended to help those skilled in the art further understand the present invention, but they are not intended to limit the present invention in any way. It should be noted that several variations and improvements can also be made by one of ordinary skill in the art without departing from the conception of the present invention. These are all within the scope of protection of the present invention.

[0036] The present invention provides an ultralow-gloss PC/ABS resin composition, including the following components:

TABLE-US-00003 bisphenol A polycarbonate 40-80 parts by weight, acrylonitrile-butadiene-styrene graft 19-40 parts by weight, copolymer ultralow-gloss toughening modifier 1-20 parts by weight, and processing aid 0.1-5 parts by weight.

[0037] The bisphenol A polycarbonate has a relative molecular weight of 17,000-30,000 g/mol, a glass transition temperature of 140-150° C., and a terminal hydroxyl group content of 10%-20%. The acrylonitrile-butadiene-styrene graft copolymer has a butadiene content of 10-55% by weight, an acrylonitrile content of 15-32% by weight, and a styrene content of 30-70% by weight; and the acrylonitrile-butadiene-styrene graft copolymer has a weight average molecular weight of 100,000-180,000 g/mol.

[0038] The ultralow-gloss toughening modifier includes the following components:

TABLE-US-00004 post-treated polymer microspheres 50-80 parts by weight, low-temperature toughening agent 15-30 parts by weight, coupling agent 5-20 parts by weight, and processing aid 0.1-5 parts by weight.

[0039] The polymer microspheres are high performance special polymer microspheres, which are at least one of PTFE microspheres, PAI microspheres, PEI microspheres, and PPTA microspheres; the polymer microspheres have a diameter of 0.8-2μ.

[0040] The post-treated polymer microspheres are polymer microspheres obtained after the plasma treatment.

[0041] The method for the plasma treatment includes etching the polymer microspheres through a plasma reactor under a reactive gas atmosphere by 0.5-2.0 wt %, and holding etched microspheres in the air for 1-5 min. In order to prevent over-etching from damaging the performance of materials, the weight loss rate of the polymer microspheres should be controlled at 0.5-2.0%, and the parameters such as pulse, two-stage voltage and processing time in the plasma reactor are regulated by the weight loss rate.

[0042] The reactive gas is selected from the group consisting of oxygen, nitrogen and ammonia.

[0043] The low-temperature toughening agent is a non-crosslinking reactive toughening agent, and the coupling agent is a silane coupling agent.

[0044] The non-crosslinking reactive toughening agent includes one or more selected from the group consisting of EMA-g-MAH, EMA-g-GMA, EBA-g-MAH, EBA-g-GMA and thermoplastic styrene elastomer grafting active functional groups;

[0045] the silane coupling agent includes one or more selected from the group consisting of amino functional silane coupling agent, vinyl functional silane coupling agent, epoxy functional silane coupling agent, and methacryloyl functional silane coupling agent.

[0046] The processing aid includes at least one selected from the group consisting of an antioxidant, a lubricant, and a light stabilizer.

[0047] The antioxidant is at least one selected from the group consisting of hindered phenolic and phosphite antioxidants.

[0048] The lubricant is at least one selected from the group consisting of an alkyl silicone oil, a polyolefin wax, an oxidized polyolefin wax, a pentaerythritol ester, a fatty acid ester and an amide wax lubricant.

[0049] The light stabilizer is at least one selected from the group consisting of a salicylate, a benzophenone, a benzotriazole or a substituted triazine ultraviolet absorber, and a hindered amine radical scavenger.

Example 1 Preparation of Ultralow-Gloss Toughening Modifiers

[0050] The components and parts by weight of an ultralow-gloss toughening modifier (D) are shown in Table 1. Post-treated polymer microspheres (A), a low-temperature toughening agent (B), a coupling agent (C) and 0.3 phr of antioxidant IG-1076 were placed in an internal mixer for mixing to obtain ultralow-gloss toughening modifiers D1 to D10.

[0051] The mixing was conducted at 200-300° C. for 10-30 min.

TABLE-US-00005 TABLE 1 Ultralow-gloss Toughening Modifiers Component D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 Component A-1 70 / / / / 70 50 80 40 90  / / / Component A-2 / 70 / / / / / / / / / / / Component A-3 / / 70 / / / / / / / / / / Component A-4 / / / 70 / / / / / / / / / Component A-5 / / / 70 / / / / / / / / Component A-6 / / / / / / / / / / 70 / / Component A-7 / / / / / / / / / / / 70 / Component A-8 / / / / / / / / / / / / 70 Component B-1 20 20 20 20 20 / 30 15 40 5 20 20 20 Component B-2 / / / / / 20 / / / / / / / Component C-1 10 10 10 10 10 10 20  5 20 5 10 10 10 Antioxidant   0.3   0.3   0.3   0.3   0.3   0.3   0.3   0.3   0.3   0.3   0.3   0.3   0.3 In Table 1, Component A-1: Plasma-treated PTFE microspheres (0.8-2μ in diameter) with a weight loss of 1 wt %. Component A-2: Plasma-treated PTFE microspheres (0.8-2μ in diameter) with a weight loss of 0.5 wt %. Component A-3: Plasma-treated PTFE microspheres (0.8-2μ in diameter) with a weight loss of 2.0 wt %. Component A-4: Plasma-treated PTFE microspheres (0.8-2μ in diameter) with a weight loss of 0.4%. Component A-5: Plasma-treated PTFE microspheres (0.8-2μ in diameter) with a weight loss of 2.1%. Component A-6: Plasma-treated PAI microspheres (0.8-2μ in diameter) with a weight loss of 1 wt %. Component A-7: Plasma-treated PEI microspheres (0.8-2μ in diameter) with a weight loss of 1 wt %. Component A-8: Plasma-treated PPTA microspheres (0.8-2μ in diameter) with a weight loss of 1 wt %. Component B-1: EMA-g-GMA, GMA graft ratio 8%, AX8900. Component B-2: EMA, LOTRYL ® 24MA005. Component C-1: silane coupling agent, KH-550.

Examples 2-10. Preparation of Ultralow-Gloss, Ultra-Low Temperature Resistant PC/ABS Resin Composition

[0052] Examples 2 to 10 provide an ultralow-gloss PC/ABS resin composition and a preparation method thereof, the components and weight percentage contents in the ultralow-gloss PC/ABS resin composition are as shown in Table 2. The preparation method includes: a mixture of 40-80 parts by weight of bisphenol A polycarbonate, 19-40 parts by weight of acrylonitrile-butadiene-styrene graft copolymer, 1-20 parts by weight of ultralow-gloss low temperature resistant modifier, and 0.1 to 5 parts by weight of processing aid is stirred and mixed in a high-speed mixer, and fed into a twin-screw extruder through a metering device; under the conveying, shearing and mixing of the screw, materials are melted, compounded, followed by extruding, stripping, cooling, and pelletizing, to obtain the ultralow-gloss PC/ABS resin composition.

[0053] Here, the twin-screw extruder has a screw length-to-diameter ratio of 36-44; the twin-screw extruder is provided with a temperature control device and an evacuation means; the twin-screw extruder has an extrusion temperature of 230-280° C. and a screw speed of 300-800 rpm.

Example 11

[0054] The example provides an ultralow-gloss PC/ABS resin composition and a preparation method thereof, which has basically the same components and formulations as Example 2, except that this example uses D11 instead of D1. The preparation method is the same as that in Example 2.

Example 12

[0055] The example provides an ultralow-gloss PC/ABS resin composition and a preparation method thereof, which has basically the same components and formulations as Example 2, except that this example uses D12 instead of D1. The preparation method is the same as that in Example 2.

Example 13

[0056] The example provides an ultralow-gloss PC/ABS resin composition and a preparation method thereof, which has basically the same components and formulations as Example 2, except that this example uses D13 instead of D1. The preparation method is the same as that in Example 2.

Comparative Examples 1-9

[0057] The present Comparative Examples 1 to 9 provide an ultralow-gloss PC/ABS resin composition and a preparation method thereof, and the components and the percentage by weight of the ultralow-gloss and ultra-low temperature resistant PC/ABS resin composition are shown in Table 2. The preparation method includes:

[0058] a mixture of 40-80 parts by weight of bisphenol A polycarbonate, 19-40 parts by weight of acrylonitrile-butadiene-styrene graft copolymer, 1-20 parts by weight of ultralow-gloss low temperature resistant modifier, and 0.1 to 5 parts by weight of processing aid is stirred and mixed in a high-speed mixer, and fed into a twin-screw extruder through a metering device; under the conveying, shearing and mixing of the screw, materials are melted, compounded, followed by extruding, stripping, cooling, and pelletizing, to obtain the ultralow-gloss PC/ABS resin composition.

[0059] Here, the twin-screw extruder has a screw length-to-diameter ratio of 36-44; the twin-screw extruder is provided with a temperature control device and an evacuation means; the twin-screw extruder has an extrusion temperature of 230-280° C. and a screw speed of 300-800 rpm.

TABLE-US-00006 TABLE 2 Material Formulations of the Examples and Comparative Examples Compar- Compar- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- ative Ex- ative Ex- Component ple 2 ple 3 ple 4 ple 5 ple 6 ple 7 ple 8 ple 9 ple 10 ample 1 ample 2 E-1 70 70 70 40 80 70 70 60 70 70 70 E-2 / / / / / / / / / / / F-1 20 20 20 40 19 20 20 20 19 20 20 D1 10 / / 20  1 / / 20 11 / / D2 / 10 / / / / / / / / / D3 / / 10 / / / / / / / / D4 / / / / / / / / / 10 / D5 / / / / / / / / / / 10 D6 / / / / / / / / / / / D7 / / / / / 10 / / / / / D8 / / / / / / 10 / / / / D9 / / / / / / / / / / / D10 / / / / / / / / / / / Processing   0.9   0.9   0.9   0.9   0.9   0.9   0.9   0.9   0.9   0.9   0.9 aid Compar- Compar- Compar- Compar- Compar- Compar- Compar- ative Ex- ative Ex- ative Ex- ative Ex- ative Ex- ative Ex- ative Ex- Component ample 3 ample 4 ample 5 ample 6 ample 7 ample 8 ample 9 E-1 70 70 70 30 90  / 70 E-2 / / / / / 70 / F-1 20 20 20 50 9 20 30 D1 / / / 20 1 10 / D2 / / / / / / / D3 / / / / / / / D4 / / / / / / / D5 / / / / / / / D6 10 / / / / / / D7 / / / / / / / D8 / / / / / / / D9 / 10 / / / / / D10 / / 10 / / / / Processing   0.9   0.9   0.9   0.9   0.9   0.9   0.9 aid In Table 2, Component E-1: bisphenol A polycarbonate has a relative molecular weight of 24,000 g/mol, a glass transition temperature of 150° C., and a terminal hydroxyl group content of 13%. Component E-2: bisphenol A polycarbonate has a relative molecular weight of 24,000 g/mol, a glass transition temperature of 150° C., and a terminal hydroxyl group content of 8%. Component F-1: the acrylonitrile-butadiene-styrene graft copolymer has a butadiene content of 14% by weight, an acrylonitrile content of 24% by weight, and a styrene content of 62% by weight, with a relative molecular weight of 100,000.

[0060] The processing aid is 0.5 phr of lubricant bis (octadecanol) pentaerythritol diphosphite and the antioxidant is 0.4 phr of commercially available hindered monophenol, bisphenol or polyphenol compound.

[0061] According to the PC/ABS resin compositions prepared in Examples 2 to 7 and Comparative Examples 1 to 9, test splines are prepared according to the same injection molding conditions, and the specific mechanical property test and gloss evaluation test items are as follows:

[0062] Tensile strength: tested according to ISO527 standard, test speed was 50 mm/min;

[0063] Bending strength: tested according to ISO178 standard, the test speed was 2 mm/min;

[0064] Flexural modulus: tested according to ISO178 standard, test speed was 1 mm/min;

[0065] Notched Izod impact strength at 23° C.: tested according to ISO180 standard, spline thickness was 4 mm;

[0066] Notched Izod impact strength at −30° C.: tested according to ISO180 standard, spline thickness was 4 mm, and test conditions were −30° C./4 h;

[0067] Gloss: The surface gloss of 3 mm thick plain swatches and K31 matte swatches was tested at 60° C. using a Garden Gloss Meter according to ASTM D523 and recorded in gloss units (GU), where the gloss of standard black glass sheets was 100 GU.

[0068] The test results are shown in Table 3.

TABLE-US-00007 TABLE 3 Performance Test Results of the Examples Material Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- performance ple 2 ple 3 ple 4 ple 5 ple 6 ple 7 ple 8 ple 9 ple 10 ple 11 ple 12 ple 13 Tensile 60 58 60 61 62 58 62 63 61 58 56 62 strength (MPa) Flexural 2320 2312 2316 2451 2390 2308 2361 2436 2350 2308 2312 2350 modulus (MPa) Notched Izod 50 45 48 52 51 62 45 53 48 52 53 50 impact strength at 23° C. (KJ/m.sup.2) Notched Izod 25 23 24 23 26 30 23 25 24 26 26 24 impact strength at −30° C. (KJ/m.sup.2) Gloss of plain 18 18 18 10 35 31 8 12 15 19 19 18 swatches (GU) Gloss of 1.7 1.7 1.7 1.0 2.6 2.4 0.9 1.1 1.5 1.7 1.8 1.7 K31 matte swatches (GU)

TABLE-US-00008 TABLE 4 Performance Test Results of the Comparative Examples Material Comparative Comparative Comparative Comparative Comparative Comparative Comparative Comparative Comparative performance Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Tensile 58 57 57 56 61 56 57 60 55 strength (MPa) Flexural 2310 2292 2304 2220 2310 2285 2309 2321 2200 modulus (MPa) Notched Izod 28 27 23 36 42 35 55 48 50 impact strength at 23° C. (KJ/m.sup.2) Notched Izod 11 9 6 16 18 19 32 18 24 impact strength at −30° C. (KJ/m.sup.2) Gloss of plain 19 18 17 36 16 18 46 18 82 swatches (GU) Gloss of 1.8 1.7 1.7 4.0 1.6 1.8 5.3 1.8 6.2 K31 matte swatches (GU)

[0069] From the test results of the examples and comparative examples in Table 3 and Table 4, it can be seen from Examples 2 to 10 and Comparative Example 9 that the present invention, adding an ultralow-gloss toughening modifier significantly reduces the gloss of the PC/ABS resin and maintains a high level of toughness, especially the level of low-temperature toughness, and the impact on other mechanical properties is not even obvious.

[0070] As can be seen from Examples 2, 5 to 6, 10 and Comparative Example 9, as the content of the ultralow-gloss toughening modifier increases, the gloss of both the plain swatches and the K31 matte swatches decreases, which indicates that the ultralow-gloss toughening agent can effectively reduce the gloss of the material while having little to none effect on the impact toughness and other mechanical properties of the material.

[0071] As can be seen from Examples 2 to 4, excessively high or low weight loss rate of the plasma-treated polymer microspheres has little effect on final gloss, but it seriously affect the toughness of the material and thus lead to substantially reduced impact resistance of workpieces.

[0072] As shown in Examples 2, 7, and 8, the gloss of the material is related to the components of the ultralow-gloss toughening agent, and more plasma-treated polymer microspheres in the ultralow-gloss toughening agent leads to lower surface gloss of the material when the addition amount is the same.

[0073] From Comparative Examples 4 to 5, adding too many or too little plasma-treated polymer microspheres in the ultralow-gloss toughening agent will have serious adverse effects: when the plasma-treated polymer microspheres are added in excess, in spite of low gloss, the toughness of the material is too low; the plasma-treated polymer microspheres are added in too small amount, in spite of excellent material toughness, the gloss becomes too high.

[0074] From Comparative Examples 1 to 2, when plasmas are used in treating PTFE microspheres, excessively high or low weight loss rate has little influence on the gloss of the material, but the toughness of the material is seriously deteriorated.

[0075] It can be seen from Comparative Example 3 that the toughness of the material will be significantly lower than that of ordinary PC/ABS if the toughening agent used does not contain a reactive functional group. Additionally, it can be seen from Comparative Examples 6 to 7 that the addition amount of PC further influences final properties of the material; if the addition amount of PC is too low, the material toughness will be insufficient, and if the addition amount is too high, the gloss will rise remarkably. From Comparative Example 8, the terminal hydroxyl content of the bisphenol A polycarbonate further influences the impact toughness of the final material.

[0076] In summary, the present invention uses and mixes plasma-treated polymer microspheres with a non-crosslinking reactive toughening agent, a silane coupling agent, and a processing aid in an internal mixer to prepare an ultralow-gloss toughening modifier, further preparing an ultralow-gloss low temperature resistant PC/ABS resin composition. The obtained PC/ABS resin composition has extremely low surface gloss and excellent low temperature toughness resistance, so that the present invention solves a problem that the low gloss and low temperature toughness of the PC/ABS resin are difficult to balance in the prior art. The PC/ABS resin composition prepared by the present invention has high low temperature toughness, and the notched Izod impact strength at −30° C. can reach about 25 KJ/m2; the low temperature toughness is comparable to that of the ordinary PC/ABS resin, so as to meet the requirements of low temperature storage of automobile parts and products. In addition, the PC/ABS resin prepared by the present invention has a soft and uniform matte effect while the gloss level can reach about 8, in contrast, the gloss level of K31 grain surface can only reach 0.9 or so. Therefore, the PC/ABS resin can also be used in some scenarios that requires low gloss level, and may even be used to replace the mold processing technology such as graining and texturing, which substantially saves mold costs and processing production costs.

[0077] Specific examples of the present invention have been described above. It is to be appreciated that the present invention is not limited to the specific examples described above, and various variations or modifications may be made by those skilled in the art within the scope of the claims, without having an influence on the substantive content of the present invention. The examples in the present application and the characteristics in the examples can be combined mutually in the case of no conflict.