Thermal-oxidative-aging-resistant anti-riot suit shell and preparation method thereof

Abstract

The invention discloses a thermo-oxidative aging resistant anti-riot suit shell and a preparation method thereof. The thermal-oxidative-aging-resistant anti-riot suit shell comprises a single-soldier trunk protection assembly and four-limb protection assemblies. The individual trunk protection assembly and the four-limb protection assembly are made of a thermal-oxidative-aging-resistant anti-riot suit shell modified material, and the thermal-oxidative-aging-resistant anti-riot suit shell modified material is prepared from, by mass, 30-40 parts of polycarbonate resin, 20-40 parts of a flame retardant, 10-20 parts of a flame retardant, 10-20 parts of a flame retardant, 10-20 parts of a flame retardant and 10-20 parts of a flame retardant. 50 to 60 parts of siloxane copolymerized polycarbonate resin; 1 to 1.5 parts of an antioxidant; 0.5-3 parts of a light stabilizer; 0.3 to 2 parts of an anti-dripping agent; and the balance of other auxiliary agents. Wherein the mass ratio of the polycarbonate resin to the siloxane copolymerized polycarbonate resin is 3: 2. According to the invention, the normal-temperature impact force can be obviously improved, and the application of polycarbonate in the field of storage of anti-riot clothes used at normal temperature is expanded.

Description

Technical Field

[0001] The present invention belongs to the field of storage of riot suits for low temperature, and relates to a heat-resistant and oxygen-aging resistant riot suit shell and a preparation method thereof. Background Art

[0002] Polycarbonate (PC) is a type of polymer whose macromolecular chain is composed of carbonate-type repeating structural units. It is a typical representative of plastic materials that integrate rigidity, hardness, and toughness, with a density of 1.2 g / cm 3 , and the glass transition temperature is 140 - 150 °C. It has excellent impact resistance, transparency, dimensional stability, etc. Although PC has excellent comprehensive properties, it has high moisture absorption, is prone to generating bubbles and silver streaks during processing, is prone to stress cracking, is sensitive to notches, is prone to hydrolysis at high temperatures, and has poor fatigue resistance, which severely limits the application of PC composites.

[0003] The above-mentioned disadvantages can be improved by adding functional additives for blending modification. At present, strictly controlling the molding process of PC to reduce the large internal stress remaining in the product, and studying the aging process of PC lay the foundation for its extended application. Summary of the Invention

[0004] To overcome the problem of low heat-resistant and oxygen-aging resistance of existing riot suits, the purpose of the present invention is to provide a heat-resistant and oxygen-aging resistant riot suit shell and a preparation method thereof, which can significantly improve the heat-resistant and oxygen-aging performance of the riot suit while retaining the excellent room-temperature impact resistance of the riot suit, so as to extend the service life of room-temperature riot suits.

[0005] To achieve the above purpose, the present invention provides a heat-resistant and oxygen-aging resistant riot suit shell, which includes a single-soldier torso protection component and limb protection components; the single-soldier torso protection component includes a chest armor and a crotch guard, and the limb protection components include upper and lower shoulders, upper arms, elbow guards, forearms, hands, thighs, calves, and foot protection parts. Each of the protection parts is bent to fit the limbs;

[0006] The single-soldier torso protection component and the limb protection components are made of a heat-resistant and oxygen-aging resistant riot suit shell modified material;

[0007] The heat-resistant and oxygen-aging resistant riot suit shell modified material is made of the following raw materials in parts by mass, based on a total of 100 parts: The heat-resistant and oxygen-aging resistant riot suit shell modified material includes the following raw materials in parts by mass: 30 - 40 parts of polycarbonate resin; 50 - 60 parts of silicone copolymer polycarbonate resin; 1 - 1.5 parts of antioxidant; 0.5 - 3 parts of light stabilizer; 0.3 - 2 parts of anti-dripping agent; the balance is other additives; wherein, the mass ratio of the polycarbonate resin to the silicone copolymer polycarbonate resin is 3:2.

[0008] In the above-mentioned heat-resistant and oxidation-resistant riot suit outer shell, the modified material of the heat-resistant and oxidation-resistant riot suit outer shell is made of raw materials in the following mass parts: 38.8 parts of polycarbonate resin; 58.2 parts of silicone copolymer polycarbonate resin; 1 part of antioxidant, 1.5 parts of light stabilizer, 0.3 part of anti-dripping agent, and 0.2 part of other additives.

[0009] In the above-mentioned heat-resistant and oxidation-resistant riot suit outer shell, the polycarbonate is bisphenol A type aromatic polycarbonate, and its mass melt flow rate is 8-10 g / 10 min at 300 °C / 1.2 kg; it can be specifically purchased from Wanhua Chemical, and the trade name is A1105.

[0010] In the above-mentioned heat-resistant and oxidation-resistant riot suit outer shell, the silicone copolymer polycarbonate resin is a polycarbonate resin copolymerized by bisphenol A and silicone, and it can be specifically purchased from Wanhua Chemical, and the trade name is 2240T. The average phase region size of the polysiloxane chain segment is 5-40 nm; its mass melt flow rate is 9-13 g / 10 min at 300 °C / 1.2 kg; the silicone content is 6%-20% or more.

[0011] In the above-mentioned heat-resistant and oxidation-resistant riot suit outer shell, the antioxidant includes a main antioxidant and a co-antioxidant. The main antioxidant is a hindered phenol type antioxidant (specifically, it can be antioxidant 1076), and the co-antioxidant is a phosphite type antioxidant (specifically, it can be antioxidant 168). The mass ratio of the main antioxidant to the co-antioxidant is 1:0.5-0.8.

[0012] In the above-mentioned heat-resistant and oxidation-resistant riot suit outer shell, the light stabilizer is a compound of UV637 and UV981, and the compound weight ratio is 1:1.

[0013] In the above-mentioned heat-resistant and oxidation-resistant riot suit outer shell, the anti-dripping agent is coated and modified polytetrafluoroethylene powder, specifically, it can be FD3150.

[0014] In the above-mentioned heat-resistant and oxidation-resistant riot suit outer shell, the other additive is a navy blue color masterbatch, and the specific brand can be H52232.

[0015] The present invention also provides a preparation method of the above-mentioned heat-resistant and oxidation-resistant riot suit outer shell, including the following steps:

[0016] 1) Dry each raw material for preparing the modified material of the heat-resistant and oxidation-resistant riot suit outer shell, and weigh the raw materials according to the proportion of each component in the formula;

[0017] 2) Put the raw materials into a high-speed mixer to obtain a material mixture;

[0018] 3) Put the material mixture into a twin-screw extruder for processing to obtain a strip-shaped mixture, and the processing temperature is controlled between 230 °C and 260 °C;

[0019] 4) Cool the strip-shaped mixture through a cooling device, and obtain a granular mixture from the cooled strip-shaped mixture through a granulator, which is the modified material for the heat-resistant oxygen aging-proof riot suit shell;

[0020] 5) After drying the modified material for the heat-resistant oxygen aging-proof riot suit shell, add it to an injection molding machine and process it by replacing the molds of different components respectively. The processing temperature of the injection molding machine is controlled between 280°C and 290°C, and the heat-resistant oxygen aging-proof riot suit shell is obtained.

[0021] In the above preparation method, in step 1), the drying temperature can be 80°C to 130°C, and the drying time can be 4 to 9 hours; among them, the siloxane copolymer polycarbonate resin and the polycarbonate resin are dried at 130°C for 8 hours, and the auxiliary agent is dried at 80°C for 4 hours.

[0022] In step 2), the set rotation speed of the raw material mixing can be 400 to 500 rpm / min, and the mixing time can be 3 to 5 minutes.

[0023] In step 3), the temperatures in each zone of the processing temperature are as follows: Zone 1: 230°C to 250°C, Zone 2: 240°C to 260°C, Zone 3: 250°C to 265°C, Zone 4: 260°C to 270°C, Zone 5: 255°C to 265°C, Zone 6: 250°C to 260°C, Zone 7: 230°C to 250°C, Zone 8: 240°C to 250°C, Zone 9: 250°C to 260°C, and the head: 235°C to 245°C; the main machine rotation speed is 250 to 350 rpm.

[0024] In the above preparation method, in step 4), the granulation speed can be 300 to 400 rpm;

[0025] In step 5), the drying temperature can be 90 to 110°C, and the drying time can be 6 to 10 hours;

[0026] The processing temperatures in each zone of the injection molding machine are as follows: Zone 1: 280°C to 300°C, Zone 2: 280°C to 300°C, Zone 3: 280°C to 300°C, Zone 4: 280°C to 300°C, Zone 5: 280°C to 300°C; the head temperature: 280°C to 300°C.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The present invention uses polycarbonate, siloxane copolymer polycarbonate resin and functional auxiliary agents for blending to improve the heat-resistant oxygen aging performance of polycarbonate, can significantly improve the impact force at normal temperature, and expand the application of polycarbonate in the storage field of riot suits at normal temperature. Description of the Drawings

[0029] Figure 1 This is a comparison chart of the normal temperature impact test data of the heat and oxygen aging resistant riot suit shell of the present invention.

[0030] Figure 2 This is the impact result of the 168J heavy hammer on the unaged example of the present invention.

[0031] Figure 3 This is the impact result of the 168J heavy hammer after aging for 120h in the example of the present invention.

[0032] Figure 4 This is the impact result of the 168J heavy hammer after aging for 120h in Comparative Example 2 of the present invention.

[0033] Figure 5 This is the impact result of the 168J heavy hammer after aging for 48h in Comparative Example 3 of the present invention.

[0034] Figure 6 This is the impact result of the 168J heavy hammer after aging for 24h in Comparative Example 1 of the present invention.

[0035] Figure 7 This is the impact result of the 168J heavy hammer after aging for 120h in Comparative Example 1 of the present invention. Detailed implementation mode

[0036] Unless otherwise specified, the experimental methods used in the following examples are all conventional methods.

[0037] Unless otherwise specified, the materials, reagents, etc. used in the following examples can all be obtained from commercial channels.

[0038] The present invention will be further described in detail below with reference to specific examples.

[0039] Example:

[0040] A preparation method of a heat and oxygen aging resistant riot suit shell, the modified material of the riot suit shell has the following material components and mass parts of each component:

[0041] 58.2 parts of silicone copolymer polycarbonate resin; 38.8 parts of polycarbonate resin; 1 part of antioxidant, 1.5 parts of light stabilizer, 0.3 part of anti-dripping agent, 0.2 part of other additives.

[0042] Furthermore, the polycarbonate is bisphenol A type aromatic polycarbonate, and its mass melt flow rate at 300°C / 1.2 kg is 8-10 g / 10 min, purchased from Wanhua Chemical, and the trade name is A 1105.

[0043] Further, the silicone copolymer polycarbonate resin is a polycarbonate resin copolymerized from bisphenol A and silicone, purchased from Wanhua Chemical, with the trade name of 2240T. The average phase region size of the polysiloxane segment is 5 - 40 nm; its mass melt flow rate at 300 °C / 1.2 kg is 9 - 13 g / 10 min; the silicone content is 6% - 20% or more.

[0044] Further, the antioxidant consists of a primary antioxidant and a secondary antioxidant with a mass ratio of 1:0.8. The primary antioxidant is a hindered phenol type antioxidant (specifically, it can be antioxidant 1076), and the secondary antioxidant is a phosphite type antioxidant (specifically, it can be antioxidant 168).

[0045] Further, the light stabilizer is a compound of UV637 and UV981, and the compounding weight ratio is 1:1;

[0046] The anti - dripping agent is coated and modified polytetrafluoroethylene powder, specifically, it can be FD3150;

[0047] The other additive is a navy blue masterbatch, and the specific grade can be H52232.

[0048] The preparation method of the above - mentioned heat - resistant and oxygen - aging - resistant riot suit shell includes the following steps:

[0049] 1) Dry each raw material for preparing the modified material of the heat - resistant and oxygen - aging - resistant riot suit shell, and weigh the raw materials according to the proportion of each component in the formula;

[0050] The drying temperature is 80 °C - 130 °C, and the drying time is 4 - 9 h; among them, the silicone copolymer polycarbonate resin and the polycarbonate resin are dried at 130 °C for 8 h, and the additives are dried at 80 °C for 4 h;

[0051] 2) Put the raw materials into a high - speed mixer, set the rotation speed to 450 rpm / min, and the mixing time to 4 min to obtain a material mixture;

[0052] 3) Put the material mixture into a twin - screw extruder for processing to obtain a strip - shaped mixture, and control the processing temperature between 230 °C and 260 °C;

[0053] The processing temperature of the twin - screw extruder in each zone is as follows: Zone 1: 230 °C, Zone 2: 245 °C, Zone 3: 260 °C, Zone 4: 265 °C, Zone 5: 260 °C, Zone 6: 255 °C, Zone 7: 240 °C, Zone 8: 250 °C, Zone 9: 255 °C, Head: 240 °C; the main machine rotation speed is 300 rpm;

[0054] 4) Cool the strip - shaped mixture through a cooling device, and the cooled strip - shaped mixture is granulated by a granulator (the granulation speed is 360 rpm) to obtain a granular mixture, which is the modified material of the heat - resistant and oxygen - aging - resistant riot suit shell.

[0055] 5) After drying the modified material for the heat-resistant and oxidation-resistant riot suit shell at 125°C for 8 hours, it is added to an injection molding machine and processed by replacing the molds of different components. The processing temperature of the injection molding machine is controlled between 280°C and 290°C (the processing temperatures of each zone of the injection molding machine are as follows: Zone 1: 290°C, Zone 2: 290°C, Zone 3: 285°C, Zone 4: 290°C, Zone 5: 290°C; nozzle temperature: 290°C), and then the heat-resistant and oxidation-resistant riot suit shell is obtained.

[0056] Comparative Example 1:

[0057] 59.7 parts of siloxane copolymerized polycarbonate resin; 39.8 parts of polycarbonate resin; 0.3 part of anti-dripping agent, 0.2 part of other additives.

[0058] Among them, the polycarbonate, siloxane copolymerized polycarbonate resin, anti-dripping agent and other additives are the same as those in the examples of the present invention.

[0059] Comparative Example 2:

[0060] 57.72 parts of siloxane copolymerized polycarbonate resin; 38.48 parts of polycarbonate resin; 1.8 parts of antioxidant, 1.5 parts of light stabilizer, 0.3 part of anti-dripping agent, 0.2 part of other additives.

[0061] Among them, the polycarbonate, siloxane copolymerized polycarbonate resin, anti-dripping agent and other additives are the same as those in the examples of the present invention.

[0062] Comparative Example 3:

[0063] 58.32 parts of siloxane copolymerized polycarbonate resin; 38.88 parts of polycarbonate resin; 0.8 part of antioxidant, 1.5 parts of light stabilizer, 0.3 part of anti-dripping agent, 0.2 part of other additives.

[0064] Among them, the polycarbonate, siloxane copolymerized polycarbonate resin, anti-dripping agent and other additives are the same as those in the examples of the present invention.

[0065] The products in the comparative examples were prepared according to the preparation method in the examples of the present invention.

[0066] The comparison of the main components and experimental results in the above examples and comparative examples are shown in Table 1-2 below:

[0067] Table 1 Main components of the heat-resistant and oxidation-resistant riot suit shell prepared from the comparative examples and examples

[0068]

[0069] The performance results of the obtained riot suit shell products are shown in Table 2:

[0070] Table 2 Main physical property indexes of the heat-resistant and oxygen-aging resistant riot suit outer shells prepared in the comparative examples and the examples

[0071]

[0072]

[0073] The measurement standard for the impact experiment is ASTM D256, and the results are as Figures 1-5 shown in Table 3.

[0074] Table 3 Results of the 168 J impact of the heavy hammer on the riot suit outer shell products prepared in the comparative examples and the examples after 48 h of aging

[0075]

[0076]

[0077] Through Figure 1 comparing the result data therein, it can be seen that the present invention can significantly improve the impact strength at room temperature; Figures 2-3 From the statistical results in Table 3, it can be known that there is no change in the 168 J impact of the heavy hammer on the riot suit outer shell prepared in the example of the present invention without aging, and there is only a slight crack in the 168 J impact of the heavy hammer after 120 h of aging; and from Figures 4-5 the statistical results in Table 3, it can be known that the anti-impact ability of the products in the comparative examples can reach the standard before aging, and they all cracked under the 168 J impact of the heavy hammer after 24 h of aging, indicating that the anti-impact ability of the present invention is significantly enhanced after aging.

[0078] From the above, it can be seen that adding a certain proportion of antioxidant and light stabilizer in the examples of the present invention can effectively improve the heat-resistant and oxygen-aging properties of the riot suit outer shell prepared from the PC modified material for riot suits under low-temperature conditions, such as significantly improving the impact strength at room temperature.

[0079] In summary, from the experimental results:[[]]END]]

[0080] The present invention uses polycarbonate, silicone copolymer polycarbonate resin and functional additives for blending to improve the heat-resistant and oxygen-aging properties of polycarbonate, and expands the application of polycarbonate in the field of storage of low-temperature riot suits.

Claims

1. A heat-resistant and oxidation-resistant riot suit outer shell, characterized in that, it includes a single-soldier torso protection component and limb protection components; the single-soldier torso protection component includes a chest armor and a crotch guard, and the limb protection components include upper and lower shoulders, upper arms, elbow guards, forearms, hands, thighs, calves, and foot protection parts, and each of the protection parts is bent to fit the limbs; the single-soldier torso protection component and the limb protection components are made of a heat-resistant and oxidation-resistant riot suit outer shell modified material; the heat-resistant and oxidation-resistant riot suit outer shell modified material is made of the following raw materials in parts by mass, based on a total of 100 parts: the heat-resistant and oxidation-resistant riot suit outer shell modified material includes the following raw materials in parts by mass: 30-40 parts of polycarbonate resin; 50-60 parts of silicone copolymer polycarbonate resin; 1-1.5 parts of antioxidant; 0.5-3 parts of light stabilizer; 0.3-2 parts of anti-dripping agent; the balance is other auxiliaries; wherein, the mass ratio of the polycarbonate resin to the silicone copolymer polycarbonate resin is 3:

2.

2. The heat-resistant and oxidation-resistant riot suit outer shell according to claim 1, characterized in that, the heat-resistant and oxidation-resistant riot suit outer shell modified material is made of the following raw materials in parts by mass: the heat-resistant and oxidation-resistant riot suit outer shell modified material is made of the following raw materials in parts by mass: 38.8 parts of polycarbonate resin; 58.2 parts of silicone copolymer polycarbonate resin; 1 part of antioxidant, 1.5 parts of light stabilizer, 0.3 part of anti-dripping agent, and 0.2 part of other auxiliaries.

3. The heat-resistant and oxidation-resistant riot suit outer shell according to claim 2, characterized in that, the polycarbonate resin is bisphenol A type aromatic polycarbonate, and its mass melt flow rate at 300 °C / 1.2 kg is 8-10 g / 10 min.

4. The heat-resistant and oxidation-resistant riot suit outer shell according to claim 2 or 3, characterized in that, the silicone copolymer polycarbonate resin is a polycarbonate resin copolymerized from bisphenol A and silicone, wherein the average phase region size of the polysiloxane chain segment is 5-40 nm; its mass melt flow rate at 300 °C / 1.2 kg is 9-13 g / 10 min; the silicone content is 6%-20% or more.

5. The heat-resistant and oxidation-resistant riot suit outer shell according to claim 2 or 3, characterized in that, the antioxidant includes a main antioxidant and a co-antioxidant, the main antioxidant is a hindered phenol type antioxidant, the co-antioxidant is a phosphite type antioxidant, and the mass ratio of the main antioxidant to the co-antioxidant is 1:0.5-0.

8.

6. The heat-resistant and oxidation-resistant riot suit outer shell according to claim 2 or 3, characterized in that, the light stabilizer is a compound of UV637 and UV981, and the compounding weight ratio is 1:

1.

7. The heat-resistant and oxidation-resistant riot suit outer shell according to claim 2 or 3, characterized in that, the anti-dripping agent is coated and modified polytetrafluoroethylene powder, specifically it can be FD3150; the other auxiliaries are navy blue color masterbatch, and the specific grade can be H52232.

8. The preparation method of the heat-resistant and oxidation-resistant riot suit outer shell according to any one of claims 1-7, characterized in that, It includes the following steps: 1) Dry each raw material for preparing the modified material of the heat-resistant and oxygen-aging resistant riot suit shell, and weigh the raw materials according to the proportion of each component in the formula; 2) Put the raw materials into a high-speed mixer to obtain a material mixture; 3) Put the material mixture into a twin-screw extruder for processing to obtain a strip mixture, and control the processing temperature between 230°C and 260°C; 4) Cool the strip mixture through a cooling device, and the cooled strip mixture is granulated by a granulator to obtain a granular mixture, which is the modified material of the heat-resistant and oxygen-aging resistant riot suit shell; 5) After drying the modified material of the heat-resistant and oxygen-aging resistant riot suit shell, add it to an injection molding machine and process it by replacing the molds of different parts respectively. The processing temperature of the injection molding machine is controlled between 280°C and 290°C, and the heat-resistant and oxygen-aging resistant riot suit shell is obtained; 9. According to the preparation method described in claim 8, it is characterized in that, in step 1), the drying temperature is 80°C to 130°C, and the drying time is 4 to 9 h; among them, the siloxane copolymer polycarbonate resin and the polycarbonate resin are dried at 130°C for 8 h, and the auxiliary agent is dried at 80°C for 4 h; in step 2), the set rotation speed for mixing the raw materials is 400 to 500 rpm / min, and the mixing time is 3 to 5 min; in step 3), the processing temperature in each zone is as follows: zone 1: 230°C to 250°C, zone 2: 240°C to 260°C, zone 3: 250°C to 265°C, zone 4: 260°C to 270°C, zone 5: 255°C to 265°C, zone 6: 250°C to 260°C, zone 7: 230°C to 250°C, zone 8: 240°C to 250°C, zone 9: 250°C to 260°C, head: 235°C to 245°C; the main machine rotation speed is 250 to 350 rpm.

10. According to the preparation method described in claim 8 or 9, it is characterized in that, in step 4), the granulation speed is 300 to 400 rpm; in step 5), the drying temperature is 90 to 110°C, and the drying time is 6 to 10 h; the processing temperature in each zone of the injection molding machine is as follows: zone 1: 280°C to 300°C, zone 2: 280°C to 300°C, zone 3: 280°C to 300°C, zone 4: 280°C to 300°C, zone 5: 280°C to 300°C; head temperature: 280°C to 300°C.

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