High gloss heat resistant high impact polypropylene composition and process for its preparation

Abstract

The application belongs to the technical field of polypropylene compositions, and particularly relates to a high-gloss heat-resistant high-impact polypropylene composition and a preparation method thereof.The high-gloss heat-resistant high-impact polypropylene composition is prepared by adding an antioxidant, an auxiliary antioxidant, an acid absorbent, a lubricant and a composite nucleating agent into a matrix resin of an impact copolymer polypropylene, and then extruding and granulating; the composite nucleating agent is a combination of a phosphate ester ionic liquid and a nucleating substance, wherein the nucleating substance is a combination of any two of an alpha nucleating agent, a beta nucleating agent and an inorganic filler.The polypropylene composition prepared by the application has high gloss, good heat resistance and good toughness, and the application further provides a preparation method thereof.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of polypropylene composition, and particularly relates to a high-gloss heat-resistant high-impact polypropylene composition and a preparation method thereof. BACKGROUND

[0002] Polypropylene is one of the first choices of plastic varieties in the household appliance industry due to its low density, good chemical resistance, low price, excellent comprehensive performance and other characteristics. With the development of society, people's pursuit of household appliance quality is also getting higher and higher. For the household appliance shell, in addition to having high strength and heat resistance, an attractive appearance is also very important. Therefore, resins with good mechanical properties, thermal properties and high gloss have received more and more attention.

[0003] Currently, high-gloss polypropylenes on the market mainly focus on homopolymer polypropylene and random copolymer polypropylene, but their impact performance is poor, which cannot meet the requirements of occasions with high rigidity and toughness. The existence of impact copolymer polypropylene rubber phase improves the impact performance of the product, but the gloss of the product is significantly reduced. Therefore, high-gloss heat-resistant impact polypropylene with good impact resistance, heat resistance and high gloss is the demand direction in the household appliance field. The existing technology for preparing high-gloss heat-resistant impact polypropylene can be modified by adding a modified nucleating agent, but the dispersion effect of the nucleating agent component in the polypropylene resin is poor, which easily leads to local stress concentration, thereby affecting the mechanical properties of the polypropylene product. SUMMARY

[0004] To solve the above technical problems, the present application provides a high-gloss heat-resistant high-impact polypropylene resin with high gloss, good heat resistance and good toughness. The present application also provides a preparation method thereof.

[0005] The high-gloss heat-resistant high-impact polypropylene composition of the present application uses impact copolymer polypropylene as the base resin, and is obtained by adding antioxidants, auxiliary antioxidants, acid absorbers, lubricants and composite nucleating agents to the base resin and then extruding and granulating.

[0006] The composite nucleating agent is a combination of a phosphate-based ionic liquid and a nucleating substance, wherein the nucleating substance is a combination of any two of an alpha nucleating agent, a beta nucleating agent and an inorganic filler.

[0007] Preferably, the impact copolymer polypropylene has the following technical indexes: a melt mass flow rate of 7-10 g / 10 min at 190℃ under a load of 2.16 kg; an ethylene content of 6.5-7.5 wt.%; and a xylene solubles content of 12-13 wt.%.

[0008] Preferably, the inorganic filler is talc powder, and the talc powder has a mesh size of 2500-5000 mesh.

[0009] Preferably, the alpha nucleating agent is one or more of substituted phenyl phosphate alpha nucleating agent, substituted aryl heterocyclic phosphate alpha nucleating agent and carboxylate alpha nucleating agent, further preferably one or both of substituted phenyl aluminum phosphate and substituted aryl heterocyclic aluminum phosphate; more preferably one or both of NP-509 and HPN-715.

[0010] Preferably, the beta nucleating agent is one or more of amide beta nucleating agent, rare earth beta nucleating agent and aliphatic dicarboxylate beta nucleating agent, further preferably one or more of TMB-5, NAB-82 and WBG-2.

[0011] Preferably, the phosphate ester ionic liquid is one or more of 1-ethyl-3-methyl imidazole dihydrogen phosphate, 1-ethyl-3-methyl imidazole dimethyl phosphate, 1-ethyl-3-methyl imidazole diethyl phosphate and 1-butyl-3-methyl imidazole dibutyl phosphate.

[0012] Preferably, the mass fraction of the phosphate ester ionic liquid is 0.1-0.2 parts, based on 100 parts of the impact copolymerized polypropylene.

[0013] When the nucleating substance is the alpha nucleating agent and the beta nucleating agent, the total mass fraction of the alpha nucleating agent and the beta nucleating agent is 0.05-0.06 parts, wherein the mass ratio of the alpha nucleating agent to the beta nucleating agent is 3:(2-3).

[0014] When the nucleating substance is the alpha nucleating agent and the inorganic filler or the beta nucleating agent and the inorganic filler, the mass fraction of the alpha nucleating agent or the beta nucleating agent is 0.03-0.06 parts, and the mass fraction of the inorganic filler is 0.20-0.60 parts.

[0015] Preferably, the antioxidant is tetrakis [beta-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, further preferably Irganox 1010 of Ciba Company;

[0016] The auxiliary antioxidant is tris(2,4-di-tert-butylphenyl) phosphite, further preferably Irganox 168 of Ciba Company;

[0017] The acid absorbent is calcium stearate; and the lubricant is glycerol monostearate.

[0018] Preferably, the mass fraction of the antioxidant is 0.05-0.10 parts, the mass fraction of the auxiliary antioxidant is 0.02-0.05 parts, the mass fraction of the acid absorbent is 0.02-0.06 parts, and the mass fraction of the lubricant is 0.03-0.10 parts, based on 100 parts of the impact copolymerized polypropylene.

[0019] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition comprises the following steps:

[0020] (1) Put the phosphate ester ionic liquid, nucleating agent or phosphate ester ionic liquid, nucleating agent and inorganic filler into a hand mixer after weighing, and mix uniformly to obtain a composite nucleating agent;

[0021] (2) Put the impact copolymerized polypropylene, antioxidant, auxiliary antioxidant, acid absorbent, lubricant and composite nucleating agent into a high-speed mixer, mix and discharge to obtain a mixture;

[0022] (3) The mixture is extruded and granulated by a double screw extruder, and the product is obtained.

[0023] Preferably, the extrusion temperature is 180-210℃.

[0024] Compared with the prior art, the present application has the following advantages:

[0025] 1. The polypropylene composition prepared by the present application has excellent gloss, heat resistance, rigidity and toughness, and can be used in the field of household appliances, especially the outer shell injection products of small household appliances such as water heaters, microwave ovens and electric rice cookers;

[0026] 2. The present application selects phosphate ester ionic liquid and nucleating material to form a composite nucleating system, wherein the nucleating material is composed of two kinds of inorganic fillers, α nucleating agent and β nucleating agent, and the phosphate ester ionic liquid effectively solves the problem of poor dispersion between the nucleating agent, inorganic filler component and polypropylene resin matrix, improves the compatibility between the components, reduces the amount of inorganic filler used, and improves the mechanical properties, meets the requirements of high gloss and high impact resistance, and reduces the production cost;

[0027] 3. The polypropylene resin prepared by the present application has a melt mass flow rate of 7-10 g / 10 min according to GB / T3682 (conditions: 2.16 kg, 230℃), which belongs to the category of medium melt impact copolymerized polypropylene;

[0028] 4. The polypropylene resin prepared by the present application has a Charpy notched impact strength (23℃) of more than 8kJ / m 2 , a flexural modulus of more than 1500MPa, a 60° gloss of more than 80%, and a load heat distortion temperature (0.45MPa) of more than 90℃. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described in detail below with reference to the examples.

[0030] All the raw materials used in the examples are commercially available, except for special instructions.

[0031] In examples 1-8 and comparative examples 1-4:

[0032] The technical index of the impact copolymerized polypropylene is: melt mass flow rate 7.5 g / 10 min at 190 ℃ and 2.16 kg, ethylene content 7.0 wt.%, xylene soluble 12 wt.%.

[0033] Example 1

[0034] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition is as follows:

[0035] (1) 6.0 g of 1-ethyl-3-methyl imidazole dimethyl phosphate salt, 1.8 g of alpha nucleating agent HPN-715 and 6.0 g of 2500 mesh talc are weighed and put into a handheld mixer, and after uniform mixing, a composite nucleating agent is obtained;

[0036] (2) 3 kg of impact copolymerized polypropylene, 1.5 g of antioxidant Irganox 1010, 1.5 g of auxiliary antioxidant Irganox 168, 1.5 g of acid absorbent calcium stearate, 1.8 g of lubricant glycerol monostearate, and the composite nucleating agent are put into a high-speed mixer, the high-speed mixer is started, and after mixing for 5 min, the mixture is discharged to obtain a mixed material, which is sealed and stored for preparation of extrusion granulation;

[0037] (3) The mixed material is extruded and granulated by a double screw extruder, and the extrusion granulation process conditions are as follows: extrusion temperature 180-210 ℃, screw rotation speed: 300 r / min, feeding speed 20 kg / h.

[0038] Example 2

[0039] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition is as follows:

[0040] (1) 6.0 g of 1-ethyl-3-methyl imidazole dimethyl phosphate salt, 1.8 g of alpha nucleating agent HPN-715 and 6.0 g of 2500 mesh talc are weighed and put into a handheld mixer, and after uniform mixing, a composite nucleating agent is obtained;

[0041] (2) 3 kg of impact copolymerized polypropylene, 1.5 g of antioxidant Irganox 1010, 1.5 g of auxiliary antioxidant Irganox 168, 1.5 g of acid absorbent calcium stearate, 1.8 g of lubricant glycerol monostearate, and the composite nucleating agent are put into a high-speed mixer, the high-speed mixer is started, and after mixing for 5 min, the mixture is discharged to obtain a mixed material, which is sealed and stored for preparation of extrusion granulation;

[0042] (3) The mixed material is extruded and granulated by a double screw extruder, and the extrusion granulation process conditions are as follows: extrusion temperature 180-210 ℃, screw rotation speed: 300 r / min, feeding speed 20 kg / h.

[0043] Example 3

[0044] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition described in the present application is as follows:

[0045] (1) 3.0 g of 1-ethyl-3-methylimidazole diethyl phosphate salt, 1.5 g of α nucleating agent NP-509, and 9.0 g of 5000 mesh talc are weighed and placed in a handheld mixer, and after being uniformly mixed, a composite nucleating agent is obtained;

[0046] (2) 3 kg of impact copolymerized polypropylene, 1.5 g of antioxidant Irganox 1010, 1.5 g of auxiliary antioxidant Irganox 168, 1.5 g of acid absorber calcium stearate, 1.8 g of lubricant glycerol monostearate, and the composite nucleating agent are put into a high-speed mixer, the high-speed mixer is started, and after mixing for 5 min, the mixture is discharged to obtain a mixed material, which is sealed and stored for preparation of extrusion granulation;

[0047] (3) The mixed material is extruded and granulated by using a double-screw extruder, and the high-gloss heat-resistant high-impact polypropylene composition is obtained; the extrusion granulation process conditions are as follows: extrusion temperature 180-210°C, screw rotation speed: 300 r / min, feeding speed 20 kg / h.

[0048] Example 4

[0049] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition described in the present application is as follows:

[0050] (1) 3.0 g of 1-ethyl-3-methylimidazole dimethyl phosphate salt, 0.9 g of β nucleating agent TMB-5, and 15.0 g of 5000 mesh talc are weighed and placed in a handheld mixer, and after being uniformly mixed, a composite nucleating agent is obtained;

[0051] (2) 3 kg of impact copolymerized polypropylene, 1.5 g of antioxidant Irganox 1010, 1.5 g of auxiliary antioxidant Irganox 168, 1.5 g of acid absorber calcium stearate, 1.8 g of lubricant glycerol monostearate, and the composite nucleating agent are put into a high-speed mixer, the high-speed mixer is started, and after mixing for 5 min, the mixture is discharged to obtain a mixed material, which is sealed and stored for preparation of extrusion granulation;

[0052] (3) The mixed material is extruded and granulated by using a double-screw extruder, and the high-gloss heat-resistant high-impact polypropylene composition is obtained; the extrusion granulation process conditions are as follows: extrusion temperature 180-210°C, screw rotation speed: 300 r / min, feeding speed 20 kg / h.

[0053] Example 5

[0054] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition described in the present application is as follows:

[0055] (1) 6.0 g 1-ethyl-3-methylimidazole dimethyl phosphate salt, 0.9 g β nucleating agent WBG-2 and 18.0 g 2500 mesh talc are weighed and put into a handheld mixer, and the composite nucleating agent is obtained after uniform mixing;

[0056] (2) 3 kg impact copolymerized polypropylene, 1.5 g antioxidant Irganox 1010, 1.5 g auxiliary antioxidant Irganox 168, 1.5 g acid absorber calcium stearate, 1.8 g lubricant glycerol monostearate, and the composite nucleating agent are put into a high-speed mixer, the high-speed mixer is started, and the mixture is discharged after mixing for 5 min to obtain a mixed material, which is sealed and stored for preparation of extrusion granulation;

[0057] (3) The mixed material is extruded and granulated by using a double screw extruder, and the high-gloss heat-resistant high-impact polypropylene composition is obtained; the extrusion granulation process conditions are as follows: extrusion temperature 180-210℃, screw rotation speed: 300 r / min, feeding speed 20 kg / h.

[0058] Example 6

[0059] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition described in the application is as follows:

[0060] (1) 3.0 g 1-ethyl-3-methylimidazole dimethyl phosphate salt, 0.9 g α nucleating agent HPN-715 and 0.6 g β nucleating agent TMB-5 are weighed and put into a handheld mixer, and the composite nucleating agent is obtained after uniform mixing;

[0061] (2) 3 kg impact copolymerized polypropylene, 1.5 g antioxidant Irganox 1010, 1.5 g auxiliary antioxidant Irganox 168, 1.5 g acid absorber calcium stearate, 1.8 g lubricant glycerol monostearate, and the composite nucleating agent are put into a high-speed mixer, the high-speed mixer is started, and the mixture is discharged after mixing for 5 min to obtain a mixed material, which is sealed and stored for preparation of extrusion granulation;

[0062] (3) The mixed material is extruded and granulated by using a double screw extruder, and the high-gloss heat-resistant high-impact polypropylene composition is obtained; the extrusion granulation process conditions are as follows: extrusion temperature 180-210℃, screw rotation speed: 300 r / min, feeding speed 20 kg / h.

[0063] Example 7

[0064] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition described in the application is as follows:

[0065] (1) 6.0 g 1-ethyl-3-methylimidazole dimethyl phosphate salt, 0.9 g α nucleating agent HPN-715 and 0.9 g β nucleating agent NAB-82 are weighed and put into a handheld mixer, and the composite nucleating agent is obtained after uniform mixing;

[0066] (2) Put 3kg impact copolymerized polypropylene, 1.5g antioxidant Irganox1010, 1.5g auxiliary antioxidant Irganox168, 1.5g acid absorbent calcium stearate, 1.8g lubricant glycerol monostearate, and the composite nucleating agent into a high-speed mixer, start the high-speed mixer, and discharge after mixing for 5min to obtain a mixture, which is sealed and stored for preparing extrusion granulation;

[0067] (3) The mixture is extruded and granulated by a double screw extruder, and the extrusion granulation process conditions are as follows: extrusion temperature 180-210℃, screw rotation speed: 300r / min, feeding speed 20kg / h.

[0068] Example 8

[0069] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition described in the application is as follows:

[0070] (1) Put 6.0g 1-ethyl-3-methyl imidazole dimethyl phosphate salt, 0.9g α nucleating agent HPN-715 and 0.9g β nucleating agent WBG-2 into a handheld mixer after weighing, and mix uniformly to obtain a composite nucleating agent;

[0071] (2) Put 3kg impact copolymerized polypropylene, 1.5g antioxidant Irganox1010, 1.5g auxiliary antioxidant Irganox168, 1.5g acid absorbent calcium stearate, 1.8g lubricant glycerol monostearate, and the composite nucleating agent into a high-speed mixer, start the high-speed mixer, and discharge after mixing for 5min to obtain a mixture, which is sealed and stored for preparing extrusion granulation;

[0072] (3) The mixture is extruded and granulated by a double screw extruder, and the extrusion granulation process conditions are as follows: extrusion temperature 180-210℃, screw rotation speed: 300r / min, feeding speed 20kg / h.

[0073] Comparative Example 1

[0074] (1) Put 3kg impact copolymerized polypropylene, 1.5g antioxidant Irganox1010, 1.5g auxiliary antioxidant Irganox168, 1.5g acid absorbent calcium stearate, 1.8g lubricant glycerol monostearate into a high-speed mixer, start the high-speed mixer, and discharge after mixing for 5min to obtain a mixture, which is sealed and stored for preparing extrusion granulation;

[0075] (2) The mixture is extruded and granulated by a double screw extruder, and the extrusion granulation process conditions are as follows: extrusion temperature 180-210℃, screw rotation speed: 300r / min, feeding speed 20kg / h.

[0076] Comparative Example 2

[0077] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition is as follows:

[0078] (1) 6.0 g of 1-ethyl-3-methylimidazole dimethyl phosphate salt and 18.0 g of 2500 mesh talc were weighed and put into a handheld mixer, and a composite nucleating agent was obtained after uniform mixing;

[0079] (2) 3 kg of impact copolymerized polypropylene, 1.5 g of antioxidant Irganox 1010, 1.5 g of auxiliary antioxidant Irganox 168, 1.5 g of acid absorber calcium stearate, 1.8 g of lubricant glycerol monostearate, and the composite nucleating agent were put into a high-speed mixer, the high-speed mixer was started, and the mixture was discharged after mixing for 5 min to obtain a mixed material, which was sealed and stored for extrusion granulation;

[0080] (3) The mixed material was extruded and granulated by a double screw extruder, and the high-gloss heat-resistant high-impact polypropylene composition was obtained; the extrusion granulation process conditions were as follows: extrusion temperature 180-210℃, screw rotation speed: 300 r / min, feeding speed 20 kg / h.

[0081] Comparative Example 3

[0082] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition is as follows:

[0083] (1) 6.0 g of 1-ethyl-3-methylimidazole dimethyl phosphate salt and 18.0 g of 2500 mesh talc were weighed and put into a handheld mixer, and a composite nucleating agent was obtained after uniform mixing;

[0084] (2) 3 kg of impact copolymerized polypropylene, 1.5 g of antioxidant Irganox 1010, 1.5 g of auxiliary antioxidant Irganox 168, 1.5 g of acid absorber calcium stearate, 1.8 g of lubricant glycerol monostearate, and the composite nucleating agent were put into a high-speed mixer, the high-speed mixer was started, and the mixture was discharged after mixing for 5 min to obtain a mixed material, which was sealed and stored for extrusion granulation;

[0085] (3) The mixed material was extruded and granulated by a double screw extruder, and the high-gloss heat-resistant high-impact polypropylene composition was obtained; the extrusion granulation process conditions were as follows: extrusion temperature 180-210℃, screw rotation speed: 300 r / min, feeding speed 20 kg / h.

[0086] Comparative Example 4

[0087] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition is as follows:

[0088] (1) 6.0 g of 1-ethyl-3-methylimidazole dimethyl phosphate salt and 18.0 g of 2500 mesh talc were weighed and put into a handheld mixer, and a composite nucleating agent was obtained after uniform mixing;

[0089] (2) Put 3 kg of impact copolymerized polypropylene, 1.5 g of antioxidant Irganox 1010, 1.5 g of auxiliary antioxidant Irganox 168, 1.5 g of acid absorbent calcium stearate, 1.8 g of lubricant glycerol monostearate, and the composite nucleating agent into a high-speed mixer, start the high-speed mixer, and discharge after mixing for 5 min to obtain a mixture, which is sealed and stored for preparation of extrusion granulation;

[0090] (3) The mixture is extruded and granulated by a double screw extruder to obtain the product; the extrusion granulation process conditions are as follows: extrusion temperature 180-210℃, screw rotation speed: 300 r / min, feeding speed 20 kg / h.

[0091] Comparative Example 5

[0092] The preparation method of the high-gloss heat-resistant high-impact polypropylene composition is as follows:

[0093] (1) Put 0.9 g of β nucleating agent WBG-2 and 18.0 g of 2500 mesh talc into a handheld mixer, mix uniformly to obtain a composite nucleating agent;

[0094] (2) Put 3 kg of impact copolymerized polypropylene, 1.5 g of antioxidant Irganox 1010, 1.5 g of auxiliary antioxidant Irganox 168, 1.5 g of acid absorbent calcium stearate, 1.8 g of lubricant glycerol monostearate, and the composite nucleating agent into a high-speed mixer, start the high-speed mixer, and discharge after mixing for 5 min to obtain a mixture, which is sealed and stored for preparation of extrusion granulation;

[0095] (3) The mixture is extruded and granulated by a double screw extruder to obtain the product; the extrusion granulation process conditions are as follows: extrusion temperature 180-210℃, screw rotation speed: 300 r / min, feeding speed 20 kg / h.

[0096] Performance test

[0097] The polypropylene compositions obtained in Examples 1-8 and Comparative Examples 1-5 are subjected to performance tests according to the following standards, and the results are shown in Table 1 below.

[0098] Test items and standards:

[0099] Melt mass flow rate (MFR): determined according to GB / T3682 at a temperature of 230℃ and a load of 2.16 kg;

[0100] Flexural modulus: determined according to GB / T9341;

[0101] Charpy notched impact strength: determined according to GB / T1043.1;

[0102] Glossiness: determined according to GB / T8807;

[0103] Load deflection temperature: measured according to GB / T1634.2, load 0.45 MPa.

[0104] Table 1 Performance test table of examples 1-8 and comparative examples 1-5

[0105]

[0106] As can be seen from Table 1, the high-gloss heat-resistant high-impact polypropylene composition prepared by the application has excellent gloss, heat resistance, rigidity and toughness, and the combination of phosphate-based ionic liquid and nucleating agent forms a synergistic nucleating system.

[0107] Comparative example 1 does not add a composite nucleating agent, and the performance of the material is low.

[0108] Comparative example 2 does not use talc compared with example 1, proving that the toughness and gloss of the obtained composition are poor when the alpha nucleating agent is used alone, and the talc can improve the toughness and gloss of the material when used together with the alpha nucleating agent.

[0109] Comparative example 3 does not use beta nucleating agent compared with example 2, and does not use alpha nucleating agent compared with example 5, proving that the use of talc together with alpha nucleating agent or beta nucleating agent can promote the crystallization of the material, and the toughness, rigidity and gloss are obviously improved.

[0110] Comparative example 4 does not use talc compared with example 5, and does not use alpha nucleating agent compared with example 8, proving that the beta nucleating agent can improve the toughness of the material, i.e. the impact strength, but the rigidity is insufficient and the load deflection temperature is low, and the effect of the beta nucleating agent alone is not good, and the gloss, rigidity and load deflection temperature of the obtained polypropylene composition are obviously improved when the beta nucleating agent is used together with other nucleating agents (inorganic fillers or alpha nucleating agents), and the toughness is also improved.

[0111] Comparative example 5 does not use phosphate-based ionic liquid compared with example 5, proving that the composition has stress defect points, and has a greater influence on the mechanical properties, especially the impact strength.

[0112] The application simultaneously improves the gloss and impact resistance, ensures the mechanical properties of the material, reduces the amount of inorganic fillers used, and reduces the production cost.

Claims

1. A high gloss, heat-resistant, high-impact polypropylene composition, characterized in that, The anti-impact copolymerized polypropylene is used as the base resin, and the base resin is extruded and granulated after adding the antioxidant, the auxiliary antioxidant, the acid absorbent, the lubricant and the composite nucleating agent; The composite nucleating agent is a combination of phosphate-based ionic liquid and nucleating substance, wherein the nucleating substance is a combination of any two of alpha nucleating agent, beta nucleating agent and inorganic filler; The phosphate-based ionic liquid is one or more of 1-ethyl-3-methyl imidazole dihydrogen phosphate, 1-ethyl-3-methyl imidazole dimethyl phosphate, 1-ethyl-3-methyl imidazole diethyl phosphate and 1-butyl-3-methyl imidazole dibutyl phosphate; The inorganic filler is talc; The alpha nucleating agent is one or more of substituted phenyl phosphate alpha nucleating agent, substituted aryl heterocyclic phosphate alpha nucleating agent and carboxylate alpha nucleating agent; The beta nucleating agent is one or more of amide beta nucleating agent, rare earth beta nucleating agent and aliphatic dicarboxylate beta nucleating agent.

2. High gloss heat resistant high-impact polypropylene composition according to claim 1, characterized in that, The anti-impact copolymerized polypropylene has a melt mass flow rate of 7-10 g / 10 min at 190℃ under a load of 2.16 kg, an ethylene content of 6.5-7.5 wt.% and a xylene solubles content of 12-13 wt.%.

3. The high gloss, heat resistant, high-impact polypropylene composition according to claim 1, characterized in that, The phosphate-based ionic liquid accounts for 0.1-0.2 parts by mass based on 100 parts by mass of the anti-impact copolymerized polypropylene; When the nucleating substance is the alpha nucleating agent and the beta nucleating agent, the total amount of the alpha nucleating agent and the beta nucleating agent is 0.05-0.06 parts by mass, and the mass ratio of the alpha nucleating agent to the beta nucleating agent is 3:(2-3); When the nucleating substance is the alpha nucleating agent and the inorganic filler or the beta nucleating agent and the inorganic filler, the amount of the alpha nucleating agent or the beta nucleating agent is 0.03-0.06 parts by mass, and the amount of the inorganic filler is 0.20-0.60 parts by mass.

4. The high gloss, heat resistant, high-impact polypropylene composition according to claim 1, characterized in that, The antioxidant is tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester, the auxiliary antioxidant is tris(2,4-di-tert-butylphenyl) phosphite, the acid absorbent is calcium stearate and the lubricant is glycerol monostearate; The antioxidant accounts for 0.05-0.10 parts by mass, the auxiliary antioxidant accounts for 0.02-0.05 parts by mass, the acid absorbent accounts for 0.02-0.06 parts by mass and the lubricant accounts for 0.03-0.10 parts by mass based on 100 parts by mass of the anti-impact copolymerized polypropylene.

5. A process for the preparation of a high gloss, heat-resistant, high-impact polypropylene composition according to any one of claims 1 to 4, characterized in that The method comprises the following steps: (1) The phosphate-based ionic liquid, the nucleating agent or the phosphate-based ionic liquid, the nucleating agent and the inorganic filler are weighed and put into a handheld mixer, and then mixed uniformly to obtain the composite nucleating agent; (2) The anti-impact copolymerized polypropylene, the antioxidant, the auxiliary antioxidant, the acid absorbent, the lubricant and the composite nucleating agent are put into a high-speed mixer, and then mixed to obtain a mixture; (3) The mixture is extruded and granulated by using a double-screw extruder.

6. Process for the preparation of a high-gloss heat-resistant high-impact polypropylene composition according to claim 5, characterized in that, The extrusion temperature is 180-210℃.

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