A scratch-resistant polycarbonate binary alloy material and preparation method thereof

Abstract

The invention discloses a scratch-resistant polycarbonate binary alloy material and a preparation method thereof, which is composed of the following materials by mass percentage: 40-60 parts of polycarbonate; 30-40 parts of polymethyl methacrylate; 5-10 parts of compatibilizer; 3-5 parts of silicone masterbatch; 1-6 parts of terminal hydroxyl silicone oil; weighing each raw material according to the formula, drying the weighed polycarbonate and polymethyl methacrylate; mixing the dried polycarbonate and polymethyl methacrylate with other raw materials in a high-speed mixer for 10min and then melt-extruded to form a scratch-resistant polycarbonate binary alloy material. The impact resistance of the modified PC binary alloy is better than that of the pure alloy, indicating that the compatibility of the alloy is good. The surface hardness of the binary alloy is significantly improved, and the scratch resistance is improved. The blending modification reduces the melting point of the material, improves the processing performance, and improves the comprehensive performance of the material.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a scratch-resistant polycarbonate binary alloy material and a preparation method thereof. Background Art

[0002] Polycarbonate is an almost colorless, glassy amorphous polymer with good optical properties, heat resistance, impact resistance, resistance to weak acids, weak bases and neutral oils. Due to the special structure of PC, it has become one of the fastest growing general engineering plastics. It has excellent comprehensive performance and is widely used in the fields of electronic appliances, sheet containers, automotive industry, medical equipment, protective equipment, etc., and is rapidly expanding to emerging fields such as aerospace, optical components, optoelectronic information, etc. PC has good impact resistance, dimensional stability and weather resistance. However, the surface scratch resistance of PC is very poor, which largely limits the further application of PC in high-end fields.

[0003] Polymethyl methacrylate has high surface hardness and scratch resistance, but due to its large molecular weight and small melt index, it has poor fluidity during processing and cannot be formed into large-sized and complex-structured parts. There are precedents for the study of blending polymethyl methacrylate and polycarbonate to make binary alloys, but there are generally problems such as poor bonding between the two, unsatisfactory impact performance, and unsatisfactory surface hardness. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of the prior art and to provide an improved PC binary alloy and a preparation method thereof, the surface of which has higher hardness and lubricity to resist most scratch damage during the use of the material.

[0005] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0006] A scratch-resistant polycarbonate binary alloy material, composed of the following materials by mass percentage:

[0007]

[0008] In some embodiments, the polycarbonate is made of Saudi Sabic, model: LEXAN 144R; the polymethyl methacrylate is made of Mitsubishi Rayon, model: ACRYPET MF001; the polyester compatibilizer is GT-GEN produced by Shenyang Xingete Plastic Co., Ltd.; the silicone masterbatch is KJ-H120 produced by Hangzhou Kaijie Plastic Technology Co., Ltd.; and the terminal hydroxyl silicone oil is 203 terminal hydroxyl silicone oil produced by Zhejiang Rongli High-tech Materials Co., Ltd.

[0009] In some embodiments, the material includes 60 parts of polycarbonate, 30 parts of polymethyl methacrylate, 5 parts of compatibilizer, 4 parts of silicone masterbatch, and 1 part of terminal hydroxyl silicone oil.

[0010] In some embodiments, the material includes 40 parts of polycarbonate, 40 parts of polymethyl methacrylate, 10 parts of compatibilizer, 5 parts of silicone masterbatch, and 5 parts of terminal hydroxyl silicone oil.

[0011] In some embodiments, the materials used are: 50 parts of polycarbonate, 35 parts of polymethyl methacrylate, 5 parts of compatibilizer, 4 parts of silicone masterbatch, and 6 parts of terminal hydroxyl silicone oil.

[0012] In some embodiments, the materials used are: 55 parts of polycarbonate, 30 parts of polymethyl methacrylate, 10 parts of compatibilizer, 4 parts of silicone masterbatch, and 1 part of terminal hydroxyl silicone oil.

[0013] In some embodiments, the materials used are: 55 parts of polycarbonate, 30 parts of polymethyl methacrylate, 5 parts of compatibilizer, 7 parts of silicone masterbatch, and 3 parts of terminal hydroxyl silicone oil.

[0014] A method for preparing a scratch-resistant polycarbonate binary alloy material comprises the following steps:

[0015] S100: weighing various raw materials according to the formula, and drying the weighed polycarbonate and polymethyl methacrylate;

[0016] S200: Mixing the polycarbonate and polymethyl methacrylate dried in step S100 with other raw materials in a high-speed mixer for 10 minutes and then melt-extruding to prepare a scratch-resistant polycarbonate binary alloy material.

[0017] In some embodiments, the drying process in step S100 is performed at a temperature of 100-110° C. and the drying time is 4-6 hours.

[0018] In some embodiments, the melt extrusion operation in step S200 is carried out in an extruder, and the temperatures of each section in the extruder are: 220-240°C in zone 1, 240-250°C in zone 2, 240-260°C in zone 3, 240-260°C in zone 4, 240-260°C in zone 5, 240-260°C in zone 6, 240-260°C in zone 7, 240-250°C in zone 8, 240-250°C in zone 9, 240-250°C in zone 10, and 265-270°C in zone 11, wherein the screw aspect ratio is 36-48, and the screw speed is 200-500rpm.

[0019] The present invention provides a scratch-resistant polycarbonate binary alloy material and a preparation method thereof, which have the following advantages:

[0020] The melting point of the alloyed polycarbonate after blending and modification in the present invention is reduced, the processing performance is improved, and the lubricant can be better combined. The polyester alloy compatibilizer GT-GEN of Shenyang Xinge Special Plastic Co., Ltd. is used in the present invention to better fuse the polycarbonate and polymethyl methacrylate with poor compatibility, so that the material has good dispersibility during the extrusion process, and the material has good rigidity and toughness after extrusion molding, and can also have excellent corrosion resistance, hydrolysis resistance, scratch resistance and other properties, and its cost is low. The present invention has a better surface scratch resistance effect than the simple blending of polycarbonate and polymethyl methacrylate by adding silicone masterbatch and silicone oil and PMMA. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments.

[0022] A scratch-resistant polycarbonate binary alloy material, composed of the following materials by mass percentage: 40-60 parts of polycarbonate; 30-40 parts of polymethyl methacrylate; 5-10 parts of compatibilizer; 3-5 parts of silicone masterbatch; 1-6 parts of terminal hydroxyl silicone oil. In the above technical scheme, the melting point of the alloyed polycarbonate after blending and modification is reduced, the processing performance is improved, and the lubricant can be better combined. The polyester alloy compatibilizer GT-GEN of Shenyang Xinge Special Plastic Co., Ltd. can be used to better fuse the polycarbonate and polymethyl methacrylate with poor compatibility, so that the material has good dispersibility during the extrusion process. After extrusion molding, the material has good rigidity and toughness, and can also have excellent corrosion resistance, hydrolysis resistance, scratch resistance and other properties, and its cost is low. By adding silicone masterbatch and silicone oil and PMMA synergistically, it has a better surface scratch resistance effect than the simple blending of polycarbonate and polymethyl methacrylate.

[0023] Further, polycarbonate (PC) is a known commercial product purchased from Saudi Sabic, model: LEXAN 144R. Polymethyl methacrylate (PMMA) is a known commercial product purchased from Mitsubishi Rayon, model: ACRYPET MF001. The polyester compatibilizer can be GT-GEN from Shenyang Xingete Plastic Co., Ltd. The silicone masterbatch can be KJ-H120 from Hangzhou Kaijie Plastic Technology Co., Ltd. The terminal hydroxyl silicone oil can be 203 terminal hydroxyl silicone oil from Zhejiang Rongli High-tech Materials Co., Ltd.

[0024] The following is further described in conjunction with specific embodiments.

[0025] <Example 1>

[0026] The present embodiment provides a scratch-resistant polycarbonate binary alloy material, whose raw materials, by weight, are 60 parts of polycarbonate, 30 parts of polymethyl methacrylate, 5 parts of compatibilizer, 4 parts of silicone masterbatch, and 1 part of terminal hydroxyl silicone oil.

[0027] Its preparation method is:

[0028] (1) Weigh each raw material according to the formula, and dry the weighed polycarbonate and polymethyl methacrylate at a temperature of 110° C. for 4 hours.

[0029] (2) The polycarbonate and polymethyl methacrylate dried in step (1) and other raw materials are mixed in a high-speed mixer for 10 minutes and then melt-extruded to form a scratch-resistant polycarbonate binary alloy material. The temperatures of each section in the extruder are: 240° C. in zone 1, 240° C. in zone 2, 255° C. in zone 3, 260° C. in zone 4, 265° C. in zone 5, 265° C. in zone 6, 260° C. in zone 7, 255° C. in zone 8, 250° C. in zone 9, 250° C. in zone 10, and 270° C. in zone 11, wherein the aspect ratio of the screw is 44 and the screw speed is 250 rpm.

[0030] Injection molding sample, process settings: drying temperature 110℃, drying time 4 hours, injection molding machine front section temperature 240℃, middle section temperature 250℃, rear section temperature 260℃, nozzle temperature 270 degrees, back pressure 35MPa, injection pressure 70MPa, injection speed 65mm / s, mold temperature 120℃.

[0031] <Example 2>

[0032] The present embodiment provides a scratch-resistant polycarbonate binary alloy material, whose raw materials include, by weight: 40 parts of polycarbonate, 40 parts of polymethyl methacrylate, 10 parts of a compatibilizer, 5 parts of a silicone masterbatch, and 5 parts of a terminal hydroxyl silicone oil.

[0033] Its preparation method is:

[0034] (1) Weigh each raw material according to the formula, and dry the weighed polycarbonate and polymethyl methacrylate at a temperature of 110° C. for 4 hours.

[0035] (2) The polycarbonate and polymethyl methacrylate dried in step (1) and other raw materials are mixed in a high-speed mixer for 10 minutes and then melt-extruded to form a scratch-resistant polycarbonate binary alloy material. The temperatures of each section in the extruder are: 240° C. in zone 1, 240° C. in zone 2, 255° C. in zone 3, 260° C. in zone 4, 265° C. in zone 5, 265° C. in zone 6, 260° C. in zone 7, 255° C. in zone 8, 250° C. in zone 9, 250° C. in zone 10, and 270° C. in zone 11, wherein the aspect ratio of the screw is 44 and the screw speed is 250 rpm.

[0036] Injection molding sample, process settings: drying temperature 110℃, drying time 4 hours, injection molding machine front section temperature 240℃, middle section temperature 250℃, rear section temperature 260℃, nozzle temperature 270 degrees, back pressure 35MPa, injection pressure 70MPa, injection speed 65mm / s, mold temperature 120℃.

[0037] <Example 3>

[0038] The present embodiment provides a scratch-resistant polycarbonate binary alloy material, and its raw materials are, by weight: 50 parts of polycarbonate, 35 parts of polymethyl methacrylate, 5 parts of compatibilizer, 4 parts of silicone masterbatch, and 6 parts of terminal hydroxyl silicone oil.

[0039] Its preparation method is:

[0040] (1) Weigh each raw material according to the formula, and dry the weighed polycarbonate and polymethyl methacrylate at a temperature of 110° C. for 4 hours.

[0041] (2) The polycarbonate and polymethyl methacrylate dried in step (1) and other raw materials are mixed in a high-speed mixer for 10 minutes and then melt-extruded to form a scratch-resistant polycarbonate binary alloy material. The temperatures of each section in the extruder are: 240° C. in zone 1, 240° C. in zone 2, 255° C. in zone 3, 260° C. in zone 4, 265° C. in zone 5, 265° C. in zone 6, 260° C. in zone 7, 255° C. in zone 8, 250° C. in zone 9, 250° C. in zone 10, and 270° C. in zone 11, wherein the aspect ratio of the screw is 44 and the screw speed is 250 rpm.

[0042] Injection molding sample, process settings: drying temperature 110℃, drying time 4 hours, injection molding machine front section temperature 240℃, middle section temperature 250℃, rear section temperature 260℃, nozzle temperature 270 degrees, back pressure 35MPa, injection pressure 70MPa, injection speed 65mm / s, mold temperature 120℃.

[0043] <Example 4>

[0044] The present embodiment provides a scratch-resistant polycarbonate binary alloy material, and its raw materials are, by weight: 55 parts of polycarbonate, 30 parts of polymethyl methacrylate, 10 parts of a compatibilizer, 4 parts of a silicone masterbatch, and 1 part of a terminal hydroxyl silicone oil.

[0045] Its preparation method is:

[0046] (1) Weigh each raw material according to the formula, and dry the weighed polycarbonate and polymethyl methacrylate at a temperature of 110° C. for 4 hours.

[0047] (2) The polycarbonate and polymethyl methacrylate dried in step (1) and other raw materials are mixed in a high-speed mixer for 10 minutes and then melt-extruded to form a scratch-resistant polycarbonate binary alloy material. The temperatures of each section in the extruder are: 240° C. in zone 1, 240° C. in zone 2, 255° C. in zone 3, 260° C. in zone 4, 265° C. in zone 5, 265° C. in zone 6, 260° C. in zone 7, 255° C. in zone 8, 250° C. in zone 9, 250° C. in zone 10, and 270° C. in zone 11, wherein the aspect ratio of the screw is 44 and the screw speed is 250 rpm.

[0048] Injection molding sample, process settings: drying temperature 110℃, drying time 4 hours, injection molding machine front section temperature 240℃, middle section temperature 250℃, rear section temperature 260℃, nozzle temperature 270 degrees, back pressure 35MPa, injection pressure 70MPa, injection speed 65mm / s, mold temperature 120℃.

[0049] <Example 5>

[0050] The present embodiment provides a scratch-resistant polycarbonate binary alloy material, whose raw materials include, by weight: 55 parts of polycarbonate, 30 parts of polymethyl methacrylate, 5 parts of compatibilizer, 7 parts of silicone masterbatch, and 3 parts of terminal hydroxyl silicone oil.

[0051] Its preparation method is:

[0052] (1) Weigh each raw material according to the formula, and dry the weighed polycarbonate and polymethyl methacrylate at a temperature of 110° C. for 4 hours.

[0053] (2) The polycarbonate and polymethyl methacrylate dried in step (1) and other raw materials are mixed in a high-speed mixer for 10 minutes and then melt-extruded to form a scratch-resistant polycarbonate binary alloy material. The temperatures of each section in the extruder are: 240° C. in zone 1, 240° C. in zone 2, 255° C. in zone 3, 260° C. in zone 4, 265° C. in zone 5, 265° C. in zone 6, 260° C. in zone 7, 255° C. in zone 8, 250° C. in zone 9, 250° C. in zone 10, and 270° C. in zone 11, wherein the aspect ratio of the screw is 44 and the screw speed is 250 rpm.

[0054] Injection molding sample, process settings: drying temperature 110℃, drying time 4 hours, injection molding machine front section temperature 240℃, middle section temperature 250℃, rear section temperature 260℃, nozzle temperature 270 degrees, back pressure 35MPa, injection pressure 70MPa, injection speed 65mm / s, mold temperature 120℃.

[0055] Comparative Example 1

[0056] The raw materials of this comparative example (by mass): 70 parts of polycarbonate and 30 parts of polymethyl methacrylate.

[0057] Its preparation method is:

[0058] (1) Weigh each raw material according to the formula, and dry the weighed polycarbonate and polymethyl methacrylate at a temperature of 110° C. for 4 hours.

[0059] (2) The polycarbonate and polymethyl methacrylate dried in step (1) and other raw materials are mixed in a high-speed mixer for 10 minutes and then melt-extruded to form a scratch-resistant polycarbonate binary alloy material. The temperatures of each section in the extruder are: 240° C. in zone 1, 240° C. in zone 2, 255° C. in zone 3, 260° C. in zone 4, 265° C. in zone 5, 265° C. in zone 6, 260° C. in zone 7, 255° C. in zone 8, 250° C. in zone 9, 250° C. in zone 10, and 270° C. in zone 11, wherein the aspect ratio of the screw is 44 and the screw speed is 250 rpm.

[0060] Injection molding sample, process settings: drying temperature 110℃, drying time 4 hours, injection molding machine front section temperature 240℃, middle section temperature 250℃, rear section temperature 260℃, nozzle temperature 270 degrees, back pressure 35MPa, injection pressure 70MPa, injection speed 65mm / s, mold temperature 120℃.

[0061] Comparative Example 2

[0062] The raw materials of this comparative example (by mass): 65 parts of polycarbonate, 30 parts of polymethyl methacrylate, and 5 parts of compatibilizer.

[0063] Its preparation method is:

[0064] (1) Weigh each raw material according to the formula, and dry the weighed polycarbonate and polymethyl methacrylate at a temperature of 110° C. for 4 hours.

[0065] (2) The polycarbonate and polymethyl methacrylate dried in step (1) and other raw materials are mixed in a high-speed mixer for 10 minutes and then melt-extruded to form a scratch-resistant polycarbonate binary alloy material. The temperatures of each section in the extruder are: 240° C. in zone 1, 240° C. in zone 2, 255° C. in zone 3, 260° C. in zone 4, 265° C. in zone 5, 265° C. in zone 6, 260° C. in zone 7, 255° C. in zone 8, 250° C. in zone 9, 250° C. in zone 10, and 270° C. in zone 11, wherein the aspect ratio of the screw is 44 and the screw speed is 250 rpm.

[0066] Injection molding sample, process settings: drying temperature 110℃, drying time 4 hours, injection molding machine front section temperature 240℃, middle section temperature 250℃, rear section temperature 260℃, nozzle temperature 270 degrees, back pressure 35MPa, injection pressure 70MPa, injection speed 65mm / s, mold temperature 120℃.

[0067] The injection molded samples prepared in the above examples were subjected to notch impact and pencil hardness tests, and the test results are shown in the following table:

[0068]

[0069] The notched impact strength test standard in the above table adopts ASTM D256, with a pendulum energy of 4J.

[0070] From the data in the above table, it can be seen that the impact resistance of the modified PC binary alloy is better than that of the pure alloy, indicating that the alloy has good compatibility. The surface hardness of the binary alloy is significantly improved, and the scratch resistance is improved. The blending modification reduces the melting point of the material, improves the processing performance, and improves the comprehensive performance of the material.

[0071] The technical principle of the present invention is described above in combination with specific embodiments, but it should be noted that the above descriptions are only for explaining the principle of the present invention and cannot be interpreted as a specific limitation on the protection scope of the present invention in any way. Based on the explanation here, technicians in this field can think of other specific embodiments or equivalent replacements of the present invention without paying creative work, which will fall within the protection scope of the present invention.

Claims

1. A scratch-resistant polycarbonate binary alloy material, characterized in that: It is composed of the following materials by mass percentage: Polycarbonate 40-60 parts Polymethyl methacrylate 30-40 parts Compatibilizer 5-10 parts 3-5 parts of silicone masterbatch 1-6 parts of terminal hydroxyl silicone oil.

2. The scratch-resistant polycarbonate binary alloy material according to claim 1, characterized in that: The polycarbonate is made from Saudi Sabic, model: LEXAN 144R; the polymethyl methacrylate is made from Mitsubishi Rayon, model: ACRYPET MF001; the polyester compatibilizer is GT-GEN from Shenyang Xingete Plastic Co., Ltd.; the silicone masterbatch is KJ-H120 from Hangzhou Kaijie Plastic Technology Co., Ltd.; the terminal hydroxyl silicone oil is 203 terminal hydroxyl silicone oil from Zhejiang Rongli High-tech Materials Co., Ltd.

3. The scratch-resistant polycarbonate binary alloy material according to claim 1, characterized in that: The material uses 60 parts of polycarbonate, 30 parts of polymethyl methacrylate, 5 parts of compatibilizer, 4 parts of silicone masterbatch, and 1 part of terminal hydroxyl silicone oil.

4. The scratch-resistant polycarbonate binary alloy material according to claim 1, characterized in that: The material uses 40 parts of polycarbonate, 40 parts of polymethyl methacrylate, 10 parts of compatibilizer, 5 parts of silicone masterbatch, and 5 parts of terminal hydroxyl silicone oil.

5. The scratch-resistant polycarbonate binary alloy material according to claim 1, characterized in that: The materials used are: 50 parts of polycarbonate, 35 parts of polymethyl methacrylate, 5 parts of compatibilizer, 4 parts of silicone masterbatch, and 6 parts of terminal hydroxyl silicone oil.

6. The scratch-resistant polycarbonate binary alloy material according to claim 1, characterized in that: The materials used are: 55 parts of polycarbonate, 30 parts of polymethyl methacrylate, 10 parts of compatibilizer, 4 parts of silicone masterbatch, and 1 part of terminal hydroxyl silicone oil.

7. The scratch-resistant polycarbonate binary alloy material according to claim 1, characterized in that: The materials used are: 55 parts of polycarbonate, 30 parts of polymethyl methacrylate, 5 parts of compatibilizer, 7 parts of silicone masterbatch, and 3 parts of terminal hydroxyl silicone oil.

8. A method for preparing the scratch-resistant polycarbonate binary alloy material according to any one of claims 1 to 7, characterized in that: The following steps are involved: S100: weighing various raw materials according to the formula, and drying the weighed polycarbonate and polymethyl methacrylate; S200: mixing the polycarbonate and polymethyl methacrylate dried in step S100 with other raw materials in a high-speed mixer for 10 minutes and then melt-extruding to prepare a scratch-resistant polycarbonate binary alloy material.

9. The method for preparing a scratch-resistant polycarbonate binary alloy material according to claim 1, characterized in that: The drying process in step S100 is performed at a temperature of 100-110° C. and a drying time of 4-6 hours.

10. The method for preparing a scratch-resistant polycarbonate binary alloy material according to claim 9, characterized in that: The melt extrusion operation in step S200 is carried out in an extruder, and the temperatures of each section in the extruder are: 220-240°C in zone 1, 240-250°C in zone 2, 240-260°C in zone 3, 240-260°C in zone 4, 240-260°C in zone 5, 240-260°C in zone 6, 240-260°C in zone 7, 240-250°C in zone 8, 240-250°C in zone 9, 240-250°C in zone 10, and 265-270°C in zone 11, wherein the screw aspect ratio is 36-48, and the screw speed is 200-500rpm.

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