CN110698761A - High-flow ultrahigh-impact polypropylene composition and preparation method thereof - Google Patents
High-flow ultrahigh-impact polypropylene composition and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/04—Monomers containing three or four carbon atoms
- C08F210/06—Propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
Abstract
The invention belongs to the field of chemical materials, relates to a polypropylene material and a preparation method thereof, and particularly relates to a high-fluidity and ultrahigh-impact polypropylene composition. The invention provides a high-flow ultrahigh impact polypropylene composition, which comprises the following components in parts by weight: 99.47-99.83 parts of ethylene-propylene random copolymerization polypropylene resin, 0.05-0.15 part of antioxidant, 0.05-0.15 part of auxiliary antioxidant, 0.02-0.08 part of halogen absorbent and 0.05-0.15 part of peroxide. The high-flow ultrahigh-impact polypropylene composition provided by the invention has good flow energy and high impact resistance, so that the product quality of the polypropylene composition prepared by thin-wall injection molding is excellent, the polypropylene composition material can be directly used for preparing products such as household appliances, toys, packages and the like without modification, the intermediate modification link is reduced, the production cost is reduced, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the field of chemical materials, relates to a polypropylene material and a preparation method thereof, and particularly relates to a high-fluidity and ultrahigh-impact polypropylene composition.
Background
The high-flow impact-resistant polypropylene generally refers to impact-resistant polypropylene with Melt Flow Rate (MFR) of more than or equal to 20g/10min, has the advantages of high fluidity, impact resistance, high hardness, good heat resistance, high glossiness, high-speed forming and the like, is often applied to large thin-wall injection-molded products, such as household electrical appliances, automobile parts, industrial parts, food and medical packages and the like, and greatly accelerates the development of large thin-wall manufacturing industries of automobiles, household products, packages and the like. However, when a large-sized finished product is molded, the flowability and the mechanical properties of the polypropylene material cannot meet the actual requirements.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a polypropylene composition with good flow energy and high impact resistance.
It is another object of the present invention to provide a process for the preparation of said polypropylene composition.
In order to achieve the purpose, the invention adopts the technical scheme that: a high-flow ultrahigh impact polypropylene composition comprises the following components in parts by weight: 99.47-99.83 parts of ethylene-propylene random copolymerization polypropylene resin, 0.05-0.15 part of antioxidant, 0.05-0.15 part of auxiliary antioxidant, 0.02-0.08 part of halogen absorbent and 0.05-0.15 part of peroxide.
Preferably, the high flow ultra-high impact polypropylene composition comprises the following components in parts by weight: 99.66 parts of ethylene-propylene random copolymerization polypropylene resin, 0.1 part of antioxidant, 0.1 part of auxiliary antioxidant, 0.03 part of halogen absorbent and 0.11 part of oxide.
Preferably, the high flow ultra-high impact polypropylene composition comprises the following components in parts by weight: 99.71 parts of ethylene-propylene random copolymerization polypropylene resin, 0.08 part of antioxidant, 0.08 part of auxiliary antioxidant, 0.03 part of halogen absorbent and 0.1 part of oxide.
Preferably, the high flow ultra-high impact polypropylene composition comprises the following components in parts by weight: 99.7 parts of ethylene-propylene random copolymerization polypropylene resin, 0.1 part of antioxidant, 0.06 part of auxiliary antioxidant, 0.03 part of halogen absorbent and 0.11 part of oxide.
Preferably, the antioxidant is antioxidant 1010, which has the chemical name 3- (3, 5-bis-butyl-4-hydroxycyclohexyl) propionate.
Preferably, the secondary antioxidant is secondary antioxidant 168, which has a chemical name of tris (2, 4-di-tert-butylphenyl) phosphite.
Preferably, the halogen absorbent is calcium stearate.
Preferably, the peroxide is di-tert-butylperoxydiisopropylbenzene.
The invention also provides a preparation method of the high-flow ultrahigh impact polypropylene composition, which comprises the following steps:
(1) weighing the components according to the proportion, and uniformly mixing the ethylene-propylene random copolymerization polypropylene resin, the antioxidant, the auxiliary antioxidant, the halogen absorbent and the peroxide to obtain a mixture;
(2) and (2) extruding and granulating the mixture obtained in the step (1) by using an extruder to obtain the high-flow ultrahigh-impact polypropylene composition.
As a preferred embodiment of the method for preparing the high flow ultrahigh impact polypropylene composition of the present invention, in the step (1), the method for preparing the ethylene-propylene random copolymer polypropylene resin comprises: carrying out polymerization reaction in two serially connected reaction kettles, and introducing propylene and hydrogen into the first reaction kettle to obtain homopolymerized polypropylene powder; and introducing the obtained homopolymerized polypropylene powder, propylene, ethylene and hydrogen into the second reaction kettle to obtain the ethylene-propylene random copolymerization polypropylene resin.
As a preferable embodiment of the preparation method of the high flow ultra-high impact polypropylene composition of the present invention, in the polymerization reaction for obtaining the homo-polypropylene powder, the propylene and the hydrogen are added into a reaction kettle in a molar ratio of 10000:5-15, wherein the melt flow rate of the homopolymerized polypropylene powder is 6-12 g/10 min; in the polymerization reaction for obtaining the ethylene-propylene random copolymerization polypropylene resin, the mol ratio of the homopolymerized polypropylene powder, the propylene, the ethylene and the hydrogen is 6000-7000: 2000-2500: 1000-1500: 1-10; in the ethylene-propylene random copolymerization polypropylene resin, the content of ethylene is 10-15%, and the content of rubber is 30-40%; the melt flow rate of the ethylene-propylene random copolymerization polypropylene resin is 2-4 g/10min measured at the temperature of 230 ℃ and under the load of 2.16kg according to GB 3682.
As a preferred embodiment of the preparation method of the high-flow ultrahigh-impact polypropylene composition, in the step (2), the mixture in the step (1) is added into a double-screw extruder, extrusion granulation is carried out at the screw rotating speed of the extruder of 160-250 r/min and the temperature of an extrusion cylinder of 180-230 ℃, and then the obtained particles are placed in water at the temperature of 51-65 ℃ for cooling, so as to obtain the high-flow ultrahigh-impact polypropylene composition.
Compared with the prior art, the invention has the beneficial effects that:
(1) the high-flow ultrahigh-impact polypropylene composition provided by the invention has good flow energy and high impact resistance, so that the product quality of the polypropylene composition prepared by thin-wall injection molding is excellent, the polypropylene composition material can be directly used for preparing products such as household appliances, toys, packages and the like without modification, the intermediate modification link is reduced, the production cost is reduced, and the production efficiency is improved;
(2) the high-flow ultrahigh-impact polypropylene composition provided by the invention has the advantages that the fluidity is provided, the pressure of a mold cavity can be reduced when a product is subjected to thin-wall injection molding processing, the injection product can be easily molded and processed, and the injection defect and the waste rate are reduced.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
This example is a high flow ultrahigh impact polypropylene composition of the present invention, comprising the following components in parts by weight: 99.66 parts of ethylene-propylene random copolymerization polypropylene resin, 0.1 part of 3- (3, 5-dual-tert-butyl-4-hydroxycyclohexyl) propionate, 0.1 part of tris (2, 4-di-tert-butylphenyl) phosphite, 0.03 part of calcium stearate and 0.11 part of di-tert-butylperoxydiisopropylbenzene.
The preparation method of the high-flow ultrahigh impact polypropylene composition comprises the following steps:
(1) weighing the components according to the proportion, and uniformly mixing the ethylene-propylene random copolymerization polypropylene resin, 3- (3, 5-bi-tert-butyl-4-hydroxycyclohexyl) propionate, tris (2, 4-di-tert-butylphenyl) phosphite, calcium stearate and di-tert-butylperoxydiisopropylbenzene to obtain a mixture; wherein, the preparation method of the ethylene-propylene random copolymerization polypropylene resin comprises the following steps: carrying out polymerization reaction in two serially connected reaction kettles, wherein propylene and hydrogen with the molar ratio of 10000:5 are introduced into the first reaction kettle to obtain homopolymerized polypropylene powder with the melt flow rate of 7.7g/10 min; introducing the obtained homopolymerized polypropylene powder, propylene, ethylene and hydrogen into a second reaction kettle, wherein the mol ratio of the homopolymerized polypropylene powder to the propylene to the ethylene to the hydrogen is 6100: 2600: 1400:1, obtaining the ethylene-propylene random copolymerization polypropylene resin with 14 percent of ethylene content and 39 percent of rubber content, and the flow rate of the resin melt is 3.1g/10min according to the measurement of GB3682 at 230 ℃ under the load of 2.16 kg;
(2) adding the mixture obtained in the step (1) into a double-screw extruder, extruding and granulating at the screw rotating speed of the extruder of 183 revolutions per minute and the temperature of an extrusion cylinder body of 200 ℃, and then placing the obtained granules in water at the temperature of 60 ℃ for cooling to obtain the high-flow ultrahigh-impact polypropylene composition.
Example 2
This example is a high flow ultrahigh impact polypropylene composition of the present invention, comprising the following components in parts by weight: 99.71 parts of ethylene-propylene random copolymerization polypropylene resin, 0.08 part of 3- (3, 5-bi-tert-butyl-4-hydroxycyclohexyl) propionate, 0.08 part of tris (2, 4-di-tert-butylphenyl) phosphite, 0.03 part of calcium stearate and 0.1 part of di-tert-butylperoxydiisopropylbenzene.
The preparation method of the high-flow ultrahigh-impact polypropylene composition comprises the following steps:
(1) weighing the components according to the proportion, and uniformly mixing the ethylene-propylene random copolymerization polypropylene resin, 3- (3, 5-bi-tert-butyl-4-hydroxycyclohexyl) propionate, tris (2, 4-di-tert-butylphenyl) phosphite, calcium stearate and di-tert-butylperoxydiisopropylbenzene to obtain a mixture; wherein, the preparation method of the ethylene-propylene random copolymerization polypropylene resin comprises the following steps: carrying out polymerization reaction in two serially connected reaction kettles, wherein propylene and hydrogen with the molar ratio of 10000:10 are introduced into the first reaction kettle to obtain homopolymerized polypropylene powder with the melt flow rate of 9.2g/10 min; introducing the obtained homopolymerized polypropylene powder, propylene, ethylene and hydrogen into a second reaction kettle, wherein the mol ratio of the homopolymerized polypropylene powder to the propylene to the ethylene to the hydrogen is 6500:2300:1200:5, and the obtained ethylene-propylene random copolymerization polypropylene resin with the ethylene content of 12 percent and the rubber content of 35 percent and the flow rate of the resin melt of 2.8g/10min is measured according to GB3682 at 230 ℃ under the load of 2.16 kg;
(2) adding the mixture obtained in the step (1) into a double-screw extruder, extruding and granulating at the screw rotating speed of the extruder of 183 revolutions per minute and the temperature of an extrusion cylinder body of 200 ℃, and then placing the obtained granules in water at the temperature of 60 ℃ for cooling to obtain the high-flow ultrahigh-impact polypropylene composition.
Example 3
This example is a high flow ultrahigh impact polypropylene composition of the present invention, comprising the following components in parts by weight: 99.7 parts of ethylene-propylene random copolymerization polypropylene resin, 0.1 part of 3- (3, 5-dual-tert-butyl-4-hydroxycyclohexyl) propionate, 0.06 part of tris (2, 4-di-tert-butylphenyl) phosphite, 0.03 part of calcium stearate and 0.11 part of di-tert-butylperoxydiisopropylbenzene.
The preparation method of the high-flow ultrahigh-impact polypropylene composition comprises the following steps:
(1) weighing the components according to the proportion, and uniformly mixing the ethylene-propylene random copolymerization polypropylene resin, 3- (3, 5-bi-tert-butyl-4-hydroxycyclohexyl) propionate, tris (2, 4-di-tert-butylphenyl) phosphite, calcium stearate and di-tert-butylperoxydiisopropylbenzene to obtain a mixture; wherein, the preparation method of the ethylene-propylene random copolymerization polypropylene resin comprises the following steps: carrying out polymerization reaction in two serially connected reaction kettles, wherein propylene and hydrogen with the molar ratio of 10000:15 are introduced into the first reaction kettle to obtain homopolymerized polypropylene powder with the melt flow rate of 11.8g/10 min; introducing the obtained homopolymerized polypropylene powder, propylene, ethylene and hydrogen into a second reaction kettle, wherein the mol ratio of the homopolymerized polypropylene powder to the propylene to the ethylene to the hydrogen is 6700: 2200: 1100:10, obtaining ethylene-propylene random copolymerization polypropylene resin with 11 percent of ethylene content and 33 percent of rubber content, and the flow rate of the resin melt is 3.7g/10min according to the measurement of GB3682 at 230 ℃ under the load of 2.16 kg;
(2) adding the mixture obtained in the step (1) into a double-screw extruder, extruding and granulating at the screw rotating speed of the extruder of 183 revolutions per minute and the temperature of an extrusion cylinder body of 200 ℃, and then placing the obtained granules in water at the temperature of 60 ℃ for cooling to obtain the high-flow ultrahigh-impact polypropylene composition.
Example 4
This example is a high flow ultrahigh impact polypropylene composition of the present invention, comprising the following components in parts by weight: 99.47 parts of ethylene-propylene random copolymerization polypropylene resin, 0.15 part of 3- (3, 5-dual-tert-butyl-4-hydroxycyclohexyl) propionate, 0.15 part of tris (2, 4-di-tert-butylphenyl) phosphite, 0.08 part of calcium stearate and 0.15 part of di-tert-butylperoxydiisopropylbenzene.
The preparation method of the high-flow ultrahigh-impact polypropylene composition comprises the following steps:
(1) weighing the components according to the proportion, and uniformly mixing the ethylene-propylene random copolymerization polypropylene resin, 3- (3, 5-bi-tert-butyl-4-hydroxycyclohexyl) propionate, tris (2, 4-di-tert-butylphenyl) phosphite, calcium stearate and di-tert-butylperoxydiisopropylbenzene to obtain a mixture; wherein, the preparation method of the ethylene-propylene random copolymerization polypropylene resin comprises the following steps: carrying out polymerization reaction in two serially connected reaction kettles, wherein propylene and hydrogen with the molar ratio of 10000:7 are introduced into the first reaction kettle to obtain homopolymerized polypropylene powder with the melt flow rate of 8.3g/10 min; introducing the obtained homopolymerized polypropylene powder, propylene, ethylene and hydrogen into a second reaction kettle, wherein the mol ratio of the homopolymerized polypropylene powder to the propylene to the ethylene to the hydrogen is 6200:2500:1300:8, so that the ethylene-propylene random copolymerization polypropylene resin with the ethylene content of 13 percent and the rubber content of 38 percent is obtained, and the flow rate of the resin melt is 2.2g/10min when the ethylene-propylene random copolymerization polypropylene resin is measured according to GB3682 at 230 ℃ under the load of 2.16 kg;
(2) adding the mixture obtained in the step (1) into a double-screw extruder, extruding and granulating at the screw rotating speed of the extruder of 160 revolutions per minute and the temperature of an extrusion cylinder body of 180 ℃, and then placing the obtained granules into water at the temperature of 51 ℃ for cooling to obtain the high-flow ultrahigh-impact polypropylene composition.
Example 5
This example is a high flow ultrahigh impact polypropylene composition of the present invention, comprising the following components in parts by weight: 99.83 parts of ethylene-propylene random copolymerization polypropylene resin, 0.05 part of 3- (3, 5-dual-tert-butyl-4-hydroxycyclohexyl) propionate, 0.05 part of tris (2, 4-di-tert-butylphenyl) phosphite, 0.02 part of calcium stearate and 0.05 part of di-tert-butylperoxydiisopropylbenzene.
The preparation method of the high-flow ultrahigh-impact polypropylene composition comprises the following steps:
(1) weighing the components according to the proportion, and uniformly mixing the ethylene-propylene random copolymerization polypropylene resin, 3- (3, 5-bi-tert-butyl-4-hydroxycyclohexyl) propionate, tris (2, 4-di-tert-butylphenyl) phosphite, calcium stearate and di-tert-butylperoxydiisopropylbenzene to obtain a mixture; wherein, the preparation method of the ethylene-propylene random copolymerization polypropylene resin comprises the following steps: carrying out polymerization reaction in two serially connected reaction kettles, wherein propylene and hydrogen with the molar ratio of 10000:15 are introduced into the first reaction kettle to obtain homopolymerized polypropylene powder with the melt flow rate of 11.8g/10 min; and introducing the obtained homopolymerized polypropylene powder, propylene, ethylene and hydrogen into a second reaction kettle, wherein the mol ratio of the homopolymerized polypropylene powder to the propylene to the ethylene to the hydrogen is 7000: 2000: 1000:10, obtaining the ethylene-propylene random copolymerization polypropylene resin with 10 percent of ethylene content and 30 percent of rubber content, and the flow rate of the resin melt is 3.9g/10min according to the measurement of GB3682 at 230 ℃ under the load of 2.16 kg;
(2) adding the mixture obtained in the step (1) into a double-screw extruder, extruding and granulating at the screw rotating speed of the extruder of 250 revolutions per minute and the temperature of an extrusion cylinder body of 230 ℃, and then placing the obtained granules in water at the temperature of 65 ℃ for cooling to obtain the high-flow ultrahigh-impact polypropylene composition.
Comparative example 1
The comparative example is a high-flow ultrahigh impact polypropylene composition of the invention, comprising the following components in parts by weight: 99.6 parts of ethylene-propylene random copolymerization polypropylene resin, 0.1 part of 3- (3, 5-dual-tert-butyl-4-hydroxycyclohexyl) propionate, 0.06 part of tris (2, 4-di-tert-butylphenyl) phosphite, 0.03 part of calcium stearate and 0.21 part of di-tert-butylperoxydiisopropylbenzene.
The preparation method of the high-flow ultrahigh-impact polypropylene composition comprises the following steps:
(1) weighing the components according to the proportion, and uniformly mixing the ethylene-propylene random copolymerization polypropylene resin, 3- (3, 5-bi-tert-butyl-4-hydroxycyclohexyl) propionate, tris (2, 4-di-tert-butylphenyl) phosphite, calcium stearate and di-tert-butylperoxydiisopropylbenzene to obtain a mixture; wherein, the preparation method of the ethylene-propylene random copolymerization polypropylene resin comprises the following steps: carrying out polymerization reaction in two serially connected reaction kettles, wherein propylene and hydrogen with the molar ratio of 10000:3 are introduced into the first reaction kettle to obtain homopolymerized polypropylene powder with the melt flow rate of 5.4g/10 min; introducing the obtained homopolymerized polypropylene powder, propylene, ethylene and hydrogen into a second reaction kettle, wherein the mol ratio of the homopolymerized polypropylene powder to the propylene to the ethylene to the hydrogen is 7100:2000:900:15, and the ethylene-propylene random copolymerization polypropylene resin with 9% of ethylene and 29% of rubber content and 2.8g/10min of flow rate of a fat melt is obtained according to GB3682, 230 ℃ and 2.16kg load;
(2) adding the mixture obtained in the step (1) into a double-screw extruder, extruding and granulating at the screw rotating speed of the extruder of 200 revolutions per minute and the temperature of an extrusion cylinder body of 200 ℃, and then placing the obtained granules in water at the temperature of 60 ℃ for cooling to obtain the high-flow ultrahigh-impact polypropylene composition.
Effect example 1
This experimental example was conducted on the high flow ultra-high impact polypropylene compositions prepared in examples 1 to 3 for the measurement of the indexes related to mechanical properties, (1) Melt Flow Rate (MFR): measured according to GB3682 at 230 ℃ under a load of 2.16 kg; (2) ethylene content: determined by known FTIR tests based on calibration with 13C-NMR; (3) rubber content: determined according to GB/T24282-; (4) tensile yield strength: measured according to GB/T1040; (5) impact strength of the simply supported beam notch: measured according to GB/T1043.1; (6) flexural modulus: measured according to GB/T9341; (7) heat distortion temperature: determined according to GB/T1634-. The results of the test are shown in Table 1.
TABLE 1 Components and Properties of the high flow, ultra-high impact Polypropylene compositions of examples 1-3
As can be seen from the results in Table 1, the polypropylene compositions of examples 1-3 have higher melt mass flow rate, ethylene content, rubber content and impact strength of the simple beam notch than those of comparative example 1 and examples 1-3, and have good flow property and high impact resistance, so that the thin-wall injection molded parts prepared from the polypropylene compositions have excellent mechanical properties and good product quality.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The high-flow ultrahigh-impact polypropylene composition is characterized by comprising the following components in parts by weight: 99.47-99.83 parts of ethylene-propylene random copolymerization polypropylene resin, 0.05-0.15 part of antioxidant, 0.05-0.15 part of auxiliary antioxidant, 0.02-0.08 part of halogen absorbent and 0.05-0.15 part of peroxide.
2. The high flow, ultra-high impact polypropylene composition of claim 1, comprising the following components in parts by weight: 99.66 parts of ethylene-propylene random copolymerization polypropylene resin, 0.1 part of antioxidant, 0.1 part of auxiliary antioxidant, 0.03 part of halogen absorbent and 0.11 part of oxide.
3. The high flow, ultra-high impact polypropylene composition of claim 1, comprising the following components in parts by weight: 99.71 parts of ethylene-propylene random copolymerization polypropylene resin, 0.08 part of antioxidant, 0.08 part of auxiliary antioxidant, 0.03 part of halogen absorbent and 0.1 part of oxide.
4. The high flow, ultra-high impact polypropylene composition of claim 1, comprising the following components in parts by weight: 99.7 parts of ethylene-propylene random copolymerization polypropylene resin, 0.1 part of antioxidant, 0.06 part of auxiliary antioxidant, 0.03 part of halogen absorbent and 0.11 part of oxide.
5. The high flow, ultra-high impact polypropylene composition according to any one of claims 1 to 4, wherein the antioxidant is 3- (3, 5-bis-butyl-4-hydroxycyclohexyl) propionate, the secondary antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite, the halogen absorbent is calcium stearate, and the peroxide is di-tert-butylperoxydiisopropylbenzene.
6. The method for preparing a high flow ultra-high impact polypropylene composition according to any one of claims 1 to 5, comprising the steps of:
(1) weighing the components according to the proportion, and uniformly mixing the ethylene-propylene random copolymerization polypropylene resin, the antioxidant, the auxiliary antioxidant, the halogen absorbent and the peroxide to obtain a mixture;
(2) and (2) extruding and granulating the mixture obtained in the step (1) by using an extruder to obtain the high-flow ultrahigh-impact polypropylene composition.
7. The method according to claim 6, wherein in the step (1), the ethylene-propylene random copolymer polypropylene resin is prepared by: carrying out polymerization reaction in two serially connected reaction kettles, and introducing propylene and hydrogen into the first reaction kettle to obtain homopolymerized polypropylene powder; and introducing the obtained homopolymerized polypropylene powder, propylene, ethylene and hydrogen into the second reaction kettle to obtain the ethylene-propylene random copolymerization polypropylene resin.
8. The preparation method according to claim 7, wherein in the polymerization reaction for obtaining the homopolymerized polypropylene powder, the molar ratio of the propylene to the hydrogen added into a reaction kettle is 10000:5-15, and the melt flow rate of the homopolymerized polypropylene powder is 6-12 g/10 min; in the polymerization reaction for obtaining the ethylene-propylene random copolymerization polypropylene resin, the mol ratio of the homopolymerized polypropylene powder, the propylene, the ethylene and the hydrogen is 6000-7000: 2000-2500: 1000-; in the ethylene-propylene random copolymerization polypropylene resin, the content of ethylene is 10-15%, and the content of rubber is 30-40%; the melt flow rate of the ethylene-propylene random copolymerization polypropylene resin is 2-4 g/10min measured at the temperature of 230 ℃ and under the load of 2.16kg according to GB 3682.
9. The preparation method according to claim 6, wherein in the step (2), the mixture obtained in the step (1) is added into a twin-screw extruder, extrusion granulation is carried out at the screw rotation speed of the extruder of 160-250 r/min and the temperature of an extrusion cylinder of 180-230 ℃, and then the obtained granules are placed in water at the temperature of 51-65 ℃ for cooling, so as to obtain the high-flow ultrahigh-impact polypropylene composition.
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| CN108948521A (en) * | 2018-06-15 | 2018-12-07 | 中国石油化工股份有限公司 | A kind of high fluidity punching proof acrylic material |
| CN108948522A (en) * | 2018-06-15 | 2018-12-07 | 中国石油化工股份有限公司 | A kind of preparation method of high fluidity punching proof acrylic material |
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