Durable anti-aging pp plastic and its preparation process

Abstract

The application relates to the technical field of polypropylene, and discloses a durable anti-aging PP plastic and a preparation process thereof.The durable anti-aging PP plastic contains, in parts by weight, 100 parts of polypropylene resin, 1-4 parts by weight of nano titanium dioxide, 8-18 parts by weight of functionalized phenolic resin, 13-20 parts by weight of ammonium polyphosphate and the like; under the modification and coating of the functionalized phenolic resin, the nano titanium dioxide is uniformly dispersed in the PP plastic matrix, and the impact strength and the ultraviolet aging resistance of the plastic can be improved.The functionalized phenolic resin contains a naphthalene ring structure with high carbon formation property, which is beneficial to improving the high-temperature residual carbon content of the PP plastic; meanwhile, the phenolic resin containing the naphthalene ring is used as a carbon source, a nitrogen-containing triazine ring is used as a gas source, and ammonium polyphosphate is used as an acid source, so that the limiting oxygen index of the PP plastic is remarkably improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of polypropylene, in particular to a durable anti-aging PP plastic and a preparation process thereof. BACKGROUND

[0002] Polypropylene has excellent transparency, corrosion resistance, chemical stability, plasticity and other properties, and is widely applied in automobile parts, home furniture, home appliance accessories, daily plastics, medical devices, furniture and building materials and the like. Traditional polypropylene has problems of poor anti-ultraviolet aging performance and flammability. Therefore, anti-ultraviolet absorbers, flame retardants and other additives such as titanium dioxide ultraviolet absorbers, ammonium polyphosphate and triazine carbonization agents need to be added. Improving the compatibility between nano-titanium dioxide and polypropylene is a research difficulty.

[0003] Phenolic resin has the advantages of good heat resistance and high carbonization rate, and can be used as a carbonization agent and has a wide application in high molecular materials such as polypropylene, epoxy resin and ABS. Chinese patent CN108841075B discloses that polyphosphoric acid ammonium, polyvinyl alcohol, water-based phenolic resin and the like are reacted to obtain polyphosphoric acid ammonium granules, which are compounded with calcium lignosulfonate granules, aluminum hydroxide granules and the like, so that the mechanical strength and other properties of the polypropylene material can be improved. However, the patent does not improve the anti-ultraviolet aging performance of polypropylene. SUMMARY

[0004] The application solves the problem of poor compatibility between nano-titanium dioxide and polypropylene, and improves the mechanical properties and ultraviolet aging resistance of the polypropylene plastic.

[0005] The technical scheme of the application is as follows: a durable anti-aging PP plastic and a preparation process thereof, in terms of weight parts, including 100 parts of polypropylene resin, 1-4 parts of nano-titanium dioxide, 8-18 parts of functionalized phenolic resin, 13-20 parts of polyphosphoric acid ammonium and 0.15-0.2 parts of an antioxidant. The preparation process is as follows: the nano-titanium dioxide and the functionalized phenolic resin are added to a mixer, the polypropylene resin, the polyphosphoric acid ammonium and the antioxidant are added after one-time mixing, the material is added to a double-screw extruder after two-time mixing, and is melt-extruded, pelletized and injection-molded by an injection molding machine. The temperature of each section of the injection molding machine is 195-200 DEG C, and the durable anti-aging PP plastic is obtained.

[0006] Further, the temperature during one-time mixing is 80-90 DEG C, and the time is 2-4 h; the time for two-time mixing is 20-40 min.

[0007] Further, the temperature of each section of the double-screw extruder is 150-190 DEG C, and the screw rotation speed is 150-200 r / min.

[0008] Further, the preparation process of the functionalized phenolic resin is as follows:

[0009] Step (1): 2-fatty amine group-4, 6-dichloro-1, 3, 5-triazine of structural formula (n is any integer in 12-16) 4-amino-1-naphthalenesulfonic acid sodium, water, after stirring, heated to 45-55℃, stirring reaction for 7-10h, reaction dropwise added sodium carbonate aqueous solution, a large amount of precipitate was distilled under reduced pressure, after filtration with hot acetone washing, drying, 2-fatty amine group-4-(4-naphthalenesulfonic acid sodium) amine group-6-chloro-1, 3, 5-triazine was obtained. The reaction formula is:

[0010]

[0011] Step (2): 1, 4 dioxane, phenolic resin, sodium hydroxide aqueous solution were added to a flask equipped with a condenser reflux tube, heated to reaction temperature, after stirring, 2-fatty amine group-4-(4-naphthalenesulfonic acid sodium) amine group-6-chloro-1, 3, 5-triazine was added, stirring reaction, a large amount of precipitate was distilled under reduced pressure, after filtration with water, petroleum ether, ethanol was washed in turn, drying, functionalized phenolic resin was obtained. The reaction formula is:

[0012]

[0013] Further, the ratio of 2-fatty amine group-4, 6-dichloro-1, 3, 5-triazine, 4-amino-1-naphthalenesulfonic acid sodium in step (1) is 1 mol: (0.9-1) mol.

[0014] Further, the pH of the reaction solution is controlled to 8-9 by dropwise adding sodium carbonate aqueous solution in step (1).

[0015] Further, the ratio of phenolic resin, sodium hydroxide, 2-fatty amine group-4-(4-naphthalenesulfonic acid sodium) amine group-6-chloro-1, 3, 5-triazine in step (2) is 100g: (15-45) g: (200-580) g.

[0016] Further, the reaction temperature in step (2) is 85-100℃, and the reaction time is 8-12h.

[0017] Further, the functionalized phenolic resin can also be used as a charring agent in polyethylene, polyvinyl chloride, polystyrene, ABS, polycarbonate and other high molecular plastics.

[0018] (Three) Beneficial technical effects: the phenolic resin and 2-fatty amine group-4-(4-naphthalenesulfonic acid sodium) amine group-6-chloro-1, 3, 5-triazine are reacted to obtain functionalized phenolic resin containing sodium sulfonate, long-chain fatty and triazine ring, then blended with polypropylene resin, nano titanium dioxide, ammonium polyphosphate and the like, granulated, injection molded, to obtain durable anti-aging PP plastic.

[0019] The functionalized phenolic resin of the present application contains sodium sulfonate groups, which interact with the surface of nano-titanium dioxide during mixing, so that the functionalized phenolic resin coats the surface of nano-titanium dioxide, can play the role of dispersant, improve the dispersibility of nano-titanium dioxide, reduce agglomeration, and the functionalized phenolic resin contains long-chain fatty, which has good compatibility with polypropylene, so as to improve the compatibility between nano-titanium dioxide and polypropylene resin, and is beneficial to improve the mechanical properties such as impact strength of PP plastic.

[0020] The nano-titanium dioxide of the present application is uniformly dispersed in the PP plastic matrix under the modification and coating of the functionalized phenolic resin, can improve the ultraviolet absorption performance of the plastic, improve the anti-ultraviolet aging performance of the plastic, and the PP plastic still maintains high impact strength after ultraviolet aging, and has better durability.

[0021] The phenolic resin of the present application contains naphthalene ring structure with high carbon formation, which is beneficial to improve the high-temperature residual carbon content of PP plastic, and at the same time, the phenolic resin containing naphthalene ring is used as carbon source, nitrogen-containing triazine ring is used as gas source, and ammonium polyphosphate is used as acid source, to form a composite intumescent flame retardant system, which significantly improves the limiting oxygen index of PP plastic. DETAILED DESCRIPTION

[0022] The following polypropylene resin model BH3820 is from Dongguan Shouwei Plastic Raw Material Co., Ltd. The phenolic resin model 2132 is purchased from Hebei Zetian Chemical Co., Ltd. The average particle size of nano-titanium dioxide is 40 nm.

[0023] 2-dodecylamino-4,6-dichloro-1,3,5-triazine (structure formula is ), 2-tetradecylamino-4,6-dichloro-1,3,5-triazine (structure formula is ), and 2-hexadecylamino-4,6-dichloro-1,3,5-triazine (structure formula is ) are respectively prepared according to the method of the journal "Daily Chemical Industry" in June 2008, volume 38, No. 3, literature "Synthesis and surface activity of broken bond fatty sulfonate type surfactant".

[0024] Example 1: Step (1): 0.1 mol 2-tetradecylamino-4,6-dichloro-1,3,5-triazine, 0.1 mol 4-amino-1-naphthalenesulfonic acid sodium, 80 mL water are added into 160 mL acetone, after stirring, the temperature is raised to 50℃, and stirred for 10 h, during the reaction, sodium carbonate aqueous solution is added dropwise to control the pH of the reaction solution to about 9, a large amount of precipitate is precipitated by reduced pressure distillation, after filtration, the precipitate is washed with hot acetone and dried to obtain 2-tetradecylamino-4-(4-naphthalenesulfonic acid sodium) amino-6-chloro-1,3,5-triazine. The structure formula is

[0025] Step (2): A flask equipped with a condenser reflux tube was charged with 0.6 L of 1,4 dioxane, 40 g of phenolic resin, 50 mL of 6 g of sodium hydroxide aqueous solution, heated to 100°C, after stirring, 80 g of 2-tetradecylamino-4-(4-naphthalenesulfonic acid sodium) amino-6-chloro-1,3,5-triazine was added, stirred for 8 h, a large amount of precipitate was precipitated by distillation under reduced pressure, after filtration, washed with water, petroleum ether, ethanol in turn, dried to obtain functionalized phenolic resin.

[0026] Step (3): A mixer was charged with 10 g of nano titanium dioxide, 80 g of functionalized phenolic resin, mixed at 90°C for 2 h, then 1 kg of polypropylene resin, 200 g of ammonium polyphosphate, 2 g of antioxidant 1010 was added, and the mixture was mixed for 20 min. The material was fed into a twin-screw extruder with temperature of 150°C, 175°C, 190°C, 190°C, 185°C in each section, and the screw speed was 150 r / min. The material was melt extruded, pelletized, and injection molded into a durable anti-aging PP plastic by an injection molding machine with temperature of 195°C, 200°C, 200°C in each section.

[0027] Example 2: Step (1): 0.1 mol of 2-hexadecylamino-4,6-dichloro-1,3,5-triazine, 0.09 mol of 4-amino-1-naphthalenesulfonic acid sodium, 80 mL of water were added into 180 mL of acetone, stirred and heated to 45°C, stirred for 10 h, and sodium carbonate aqueous solution was added dropwise during the reaction to control the pH of the reaction solution to about 8. A large amount of precipitate was precipitated by distillation under reduced pressure, filtered, washed with hot acetone, and dried to obtain 2-hexadecylamino-4-(4-naphthalenesulfonic acid sodium) amino-6-chloro-1,3,5-triazine. The structural formula is

[0028] Step (2): A flask equipped with a condenser reflux tube was charged with 1.5 L of 1,4 dioxane, 40 g of phenolic resin, 80 mL of 12 g of sodium hydroxide aqueous solution, heated to 85°C, after stirring, 160 g of 2-hexadecylamino-4-(4-naphthalenesulfonic acid sodium) amino-6-chloro-1,3,5-triazine was added, stirred for 12 h, a large amount of precipitate was precipitated by distillation under reduced pressure, after filtration, washed with water, petroleum ether, ethanol in turn, dried to obtain functionalized phenolic resin.

[0029] Step (3): Add 25 g nano-titanium dioxide, 130 g functionalized phenolic resin into a mixer, mix for 4 h at 80 °C, then add 1 kg polypropylene resin, 150 g ammonium polyphosphate, 1.5 g antioxidant 1010, continue to mix for 40 min, add the material into a twin-screw extruder, the temperature of each section is 150 °C, 175 °C, 190 °C, 190 °C, 185 °C, the screw speed is 200 r / min, melt extrude, pelletize, and injection molding by an injection molding machine, the temperature of each section of the injection molding machine is 195 °C, 200 °C, 200 °C, to obtain a durable anti-aging PP plastic.

[0030] Example 3: Step (1): Add 0.1 mol 2-dodecylamino-4,6-dichloro-1,3,5-triazine, 0.1 mol 4-amino-1-naphthalenesulfonic acid sodium, 60 mL water into 150 mL acetone, after stirring, heat to 55 °C, stir for 7 h, add sodium carbonate aqueous solution dropwise during the reaction to control the pH of the reaction solution to about 9, distill a large amount of precipitate under reduced pressure, filter, wash with hot acetone, and dry to obtain 2-dodecylamino-4-(4-naphthalenesulfonic acid sodium) amino-6-chloro-1,3,5-triazine. The structural formula is

[0031] Step (2): Add 2 L 1,4 dioxane, 40 g phenolic resin, 120 mL containing 18 g sodium hydroxide aqueous solution into a flask equipped with a condenser reflux tube, heat to 90 °C, after stirring, add 232 g 2-dodecylamino-4-(4-naphthalenesulfonic acid sodium) amino-6-chloro-1,3,5-triazine, stir for 12 h, distill a large amount of precipitate under reduced pressure, filter, wash with water, petroleum ether, and ethanol in turn, and dry to obtain a functionalized phenolic resin.

[0032] Step (3): Add 40 g nano-titanium dioxide, 180 g functionalized phenolic resin into a mixer, mix for 3 h at 90 °C, then add 1 kg polypropylene resin, 130 g ammonium polyphosphate, 1.5 g antioxidant 1010, continue to mix for 40 min, add the material into a twin-screw extruder, the temperature of each section is 150 °C, 175 °C, 190 °C, 190 °C, 185 °C, the screw speed is 200 r / min, melt extrude, pelletize, and injection molding by an injection molding machine, the temperature of each section of the injection molding machine is 195 °C, 200 °C, 200 °C, to obtain a durable anti-aging PP plastic.

[0033] Comparative Example 1: The difference between this comparative example and Example 1 is that no functionalized phenolic resin is added.

[0034] Step (1) 10 g nano-titanium dioxide, 1 kg polypropylene resin, 200 g ammonium polyphosphate, 2 g antioxidant 1010 were added into a mixer and mixed at 90°C for 20 min. The material was added into a twin-screw extruder, and the temperature of each section was 150°C, 175°C, 190°C, 190°C, and 185°C. The screw rotation speed was 150 r / min. The material was melt-extruded, pelletized, and injection-molded by an injection molding machine. The temperature of each section of the injection molding machine was 195°C, 200°C, and 200°C. PP plastic was obtained.

[0035] Comparative Example 2: The difference between this comparative example and Example 1 is that a phenolic resin was used instead of the functionalized phenolic resin.

[0036] Step (1) 10 g nano-titanium dioxide, 80 g phenolic resin were added into a mixer and mixed at 90°C for 2 h. Then 1 kg polypropylene resin, 200 g ammonium polyphosphate, 2 g antioxidant 1010 were added and mixed for another 20 min. The material was added into a twin-screw extruder, and the temperature of each section was 150°C, 175°C, 190°C, 190°C, and 185°C. The screw rotation speed was 150 r / min. The material was melt-extruded, pelletized, and injection-molded by an injection molding machine. The temperature of each section of the injection molding machine was 195°C, 200°C, and 200°C. PP plastic was obtained.

[0037] Comparative Example 3: The difference between this comparative example and Example 1 is that 2-ethylamino-4,6-dichloro-1,3,5-triazine was used instead of 2-tetradecylamino-4,6-dichloro-1,3,5-triazine.

[0038] 2-ethylamino-4,6-dichloro-1,3,5-triazine was prepared according to the method of the article “Synthesis and Characterization of Triazine-Based Azepines” in Journal of Organic Chemistry, 2009, Vol. 29, No. 9, pp. 1419-1422.

[0039] The structural formula is

[0040] Step (1) 0.1 mol 2-ethylamino-4,6-dichloro-1,3,5-triazine, 0.1 mol sodium 4-amino-1-naphthalenesulfonate, 80 mL water were added into 160 mL acetone. After stirring, the temperature was raised to 50°C, and the reaction was stirred for 10 h. During the reaction, sodium carbonate aqueous solution was added dropwise to control the pH of the reaction solution to about 9. A large amount of precipitate was precipitated by distillation under reduced pressure. After filtration, the precipitate was washed with hot acetone and dried to obtain 2-ethylamino-4-(4-sodium naphthalenesulfonate)amino-6-chloro-1,3,5-triazine. The structural formula is

[0041] Step (2): A flask equipped with a condenser reflux tube was charged with 0.6 L of 1,4 dioxane, 40 g of phenolic resin, 50 mL of aqueous solution containing 6 g of sodium hydroxide, heated to 100°C, after stirring, 80 g of 2-ethylamino-4-(4-naphthalenesulfonic acid sodium) amino-6-chloro-1,3,5-triazine was added, stirred for 8 h, a large amount of precipitate was precipitated by distillation under reduced pressure, after filtration, washed with water, petroleum ether, ethanol in turn, dried to obtain functionalized phenolic resin.

[0042] Step (3): A mixer was charged with 10 g of nano titanium dioxide, 80 g of functionalized phenolic resin, mixed at 90°C for 2 h, then 1 kg of polypropylene resin, 200 g of ammonium polyphosphate, 2 g of antioxidant 1010 was added, and the mixture was mixed for 20 min, then the material was fed into a twin-screw extruder, the temperature of each section was 150°C, 175°C, 190°C, 190°C, 185°C, the screw rotation speed was 150 r / min, and the material was melt extruded, pelletized, and injection molded by an injection molding machine, the temperature of each section of the injection molding machine was 195°C, 200°C, 200°C, to obtain PP plastic.

[0043] Comparative Example 4: The difference between this comparative example and Example 1 is that 2-tetradecylamino-4-(2-sodium sulfonate ethyl) amino-6-chloro-1,3,5-triazine is used instead of 2-tetradecylamino-4-(4-naphthalenesulfonic acid sodium) amino-6-chloro-1,3,5-triazine.

[0044] 2-tetradecylamino-4-(2-sodium sulfonate ethyl) amino-6-chloro-1,3,5-triazine was prepared according to the method of the journal "Daily Chemical Industry", June 2008, Vol. 38, No. 3, document "Synthesis and surface activity of breakable bond triazine fatty sulfonate surfactant", and the structural formula is

[0045] Step (1): A flask equipped with a condenser reflux tube was charged with 0.6 L of 1,4 dioxane, 40 g of phenolic resin, 50 mL of aqueous solution containing 6 g of sodium hydroxide, heated to 100°C, after stirring, 80 g of 2-tetradecylamino-4-(2-sodium sulfonate ethyl) amino-6-chloro-1,3,5-triazine was added, stirred for 8 h, a large amount of precipitate was precipitated by distillation under reduced pressure, after filtration, washed with water, petroleum ether, ethanol in turn, dried to obtain functionalized phenolic resin.

[0046] Step (3): 10 g nano-titanium dioxide, 80 g functionalized phenolic resin were added into a mixer, mixed at 90℃ for 2 h, then 1 kg polypropylene resin, 200 g ammonium polyphosphate, 2 g antioxidant 1010 were added, mixed for 20 min, then the material was added into a twin-screw extruder, the temperature of each section was 150℃, 175℃, 190℃, 190℃, 185℃, the screw rotation speed was 150 r / min, melt extruded, pelletized, injection molded by an injection molding machine, the temperature of each section of the injection molding machine was 195℃, 200℃, 200℃, to obtain the PP plastic.

[0047] The notched impact strength of the PP plastic was tested according to GB / T 1043.1-2008 standard.

[0048] The PP plastic was placed in an ultraviolet light aging test box (the main wavelength was 340 nm, the power was 2 kW) for ultraviolet accelerated aging for 720 h, then placed at room temperature for 24 h, and then the impact strength was tested.

[0049] The oxygen index was tested according to GB / T 2406.1-2008 standard.

[0050] The PP plastic was placed in a thermal gravimetric analyzer, and the residual carbon content was tested in an air atmosphere, the temperature rising rate was 10℃ / min, and the maximum test temperature was 700℃.

[0051] Table 1 Impact strength test of the PP plastic

[0052]

[0053] After testing, the impact strength of the PP plastic of Comparative Example 1 was low, and the impact strength retention rate was also low after ultraviolet aging, mainly because the dispersibility of nano-titanium dioxide was poor, the compatibility with polypropylene was not good, and the nano-titanium dioxide was easy to agglomerate in the polypropylene resin matrix, which was not conducive to improving the impact strength and ultraviolet aging resistance of the PP plastic. At the same time, the limiting oxygen index and the residual carbon content of the PP plastic were low.

[0054] In the examples 1-3, the functionalized phenolic resin containing sodium sulfonate groups interacts with the surface of nano-titanium dioxide during mixing, so that the functionalized phenolic resin is modified and coated on the surface of nano-titanium dioxide, which can play the role of dispersant, improve the dispersibility of nano-titanium dioxide, reduce agglomeration, and the functionalized phenolic resin contains long-chain aliphatic groups, which has good compatibility with polypropylene, thereby improving the compatibility between nano-titanium dioxide and polypropylene resin, which is beneficial to improve the mechanical properties such as impact strength of PP plastic, and the nano-titanium dioxide is uniformly dispersed in the PP plastic matrix, which can improve the ultraviolet absorption performance of the plastic and improve the anti-ultraviolet aging performance of the plastic. After ultraviolet aging, the PP plastic still maintains a high impact strength. The phenolic resin itself has good carbon formation, and the introduction of high carbon formation naphthalene ring structure significantly improves the high-temperature carbon residue of PP plastic. The phenolic resin containing naphthalene ring is used as a carbon source, the nitrogen-containing triazine ring is used as a gas source, and the ammonium polyphosphate is used as an acid source to form a composite intumescent flame retardant system, which significantly improves the limiting oxygen index of PP plastic.

[0055] Compared with example 1, comparative example 2 only adds phenolic resin without sodium sulfonate groups, which is difficult to interact with the surface of nano-titanium dioxide and cannot play the role of dispersant, cannot improve the dispersibility of nano-titanium dioxide, resulting in low impact strength of PP plastic, and low impact strength retention rate after ultraviolet aging, and poor anti-ultraviolet aging performance. The phenolic resin also does not contain high carbon formation naphthalene ring structure and nitrogen-containing triazine ring, which is difficult to improve the limiting oxygen index of PP plastic and low high-temperature carbon residue with ammonium polyphosphate. Comparative example 3 uses 2-ethylamino-4-(4-naphthalene sodium sulfonate) amino-6-chloro-1,3,5-triazine as raw material to prepare functionalized phenolic resin, which does not contain long-chain aliphatic groups, and has poor compatibility with polypropylene resin, which cannot improve the compatibility between nano-titanium dioxide and polypropylene resin, resulting in low impact strength of PP plastic and low impact strength after ultraviolet aging. Comparative example 4 uses 2-tetradecylamino-4-(2-sodium sulfonate ethyl) amino-6-chloro-1,3,5-triazine as raw material to prepare functionalized phenolic resin, which does not contain high carbon formation naphthalene ring structure, resulting in low limiting oxygen index and low high-temperature carbon residue of PP plastic.

Claims

1. A durable and anti-aging PP plastic, characterized in that, The durable and anti-aging PP plastic comprises, by weight, 100 parts polypropylene resin, 1-4 parts nano titanium dioxide, 8-18 parts functionalized phenolic resin, 13-20 parts ammonium polyphosphate, and 0.15-0.2 parts antioxidant. The preparation process of the functionalized phenolic resin is as follows: 1,4-dioxane, phenolic resin, and sodium hydroxide aqueous solution are added to a flask equipped with a reflux condenser. The mixture is heated to the reaction temperature, stirred, and then 2-aliphatic amino-4-(4-naphthalenesulfonate sodium)amino-6-chloro-1,3,5-triazine is added. The mixture is stirred and reacted, then distilled under reduced pressure, filtered, washed, and dried to obtain the functionalized phenolic resin. The structural formula of the 2-aliphatic amino-4-(4-naphthalenesulfonate sodium)amino-6-chloro-1,3,5-triazine is as follows: n is any integer from 12 to 16.

2. The durable and anti-aging PP plastic according to claim 1, characterized in that, The ratio of the phenolic resin, sodium hydroxide, and 2-aliphatic amino-4-(4-naphthalenesulfonate sodium)amino-6-chloro-1,3,5-triazine is 100g:(15-45)g:(200-580)g.

3. The durable and anti-aging PP plastic according to claim 1, characterized in that, The reaction temperature is 85-100℃, and the reaction time is 8-12h.

4. The durable and anti-aging PP plastic according to claim 1, characterized in that, The preparation process of the 2-aliphatic amino-4-(4-naphthalenesulfonate sodium)amino-6-chloro-1,3,5-triazine is as follows: 2-aliphatic amino-4,6-dichloro-1,3,5-triazine, 4-amino-1-naphthalenesulfonate sodium, and water are added to acetone. After stirring, the mixture is heated to 45-55℃ and stirred for 7-10 hours. Sodium carbonate aqueous solution is added dropwise during the reaction. The mixture is then distilled under reduced pressure, filtered, washed, and dried to obtain 2-aliphatic amino-4-(4-naphthalenesulfonate sodium)amino-6-chloro-1,3,5-triazine. The structural formula of the 2-aliphatic amino-4,6-dichloro-1,3,5-triazine is as follows: n is any integer from 12 to 16.

5. The durable and anti-aging PP plastic according to claim 4, characterized in that, The ratio of 2-aliphatic amino-4,6-dichloro-1,3,5-triazine to sodium 4-amino-1-naphthalenesulfonate is 1 mol:(0.9-1) mol.

6. The durable and anti-aging PP plastic according to claim 4, characterized in that, The pH of the reaction solution is controlled to be 8-9 by adding sodium carbonate aqueous solution dropwise.

7. A preparation process for durable and anti-aging PP plastic as described in any one of claims 1-6, characterized in that, The preparation process is as follows: nano-titanium dioxide and functionalized phenolic resin are added to a mixer. After the first mixing, polypropylene resin, ammonium polyphosphate, and antioxidant are added. After the second mixing, the material is added to a twin-screw extruder for melt extrusion, pelletized, and injection molded. The temperature of each section of the injection molding machine is 195-200℃ to obtain durable and anti-aging PP plastic.

8. The preparation process of durable and anti-aging PP plastic according to claim 7, wherein the temperature during the first mixing is 80-90℃ and the time is 2-4h; and the time for the second mixing is 20-40min.

9. The preparation process of durable and anti-aging PP plastic according to claim 7, wherein the temperature of each section of the twin-screw extruder is 150-190℃ and the screw speed is 150-200 r / min.

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