CN111378225A - Auxiliary agent system for producing high impact polypropylene, preparation method and application thereof - Google Patents

Auxiliary agent system for producing high impact polypropylene, preparation method and application thereof Download PDF

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CN111378225A
CN111378225A CN201811628590.7A CN201811628590A CN111378225A CN 111378225 A CN111378225 A CN 111378225A CN 201811628590 A CN201811628590 A CN 201811628590A CN 111378225 A CN111378225 A CN 111378225A
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叶平山
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions 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
    • C08L23/10Homopolymers or copolymers of propene
    • C08L23/12Polypropene
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions 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
    • C08L23/10Homopolymers or copolymers of propene
    • C08L23/14Copolymers of propene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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Abstract

The invention provides an auxiliary system for producing high impact polypropylene, a preparation method and application thereof, wherein the auxiliary system comprises organic polymer poly (arylene ether nitrile), and polymer interface binder and elastomer are added to improve the compatibility between poly (arylene ether nitrile) and polypropylene, so that the impact strength and tensile strength of a polypropylene material obtained by using the auxiliary system are improved, the rigidity and toughness balance is better, inorganic rigid particles are not required to be added, the ash content is not adversely affected, the application range of the high impact polypropylene is expanded, and the high impact polypropylene has good industrial prospect.

Description

Auxiliary agent system for producing high impact polypropylene, preparation method and application thereof
Technical Field
The invention relates to an auxiliary agent system applied to high molecular polymers, in particular to an auxiliary agent system for producing high impact polypropylene, a preparation method and application thereof.
Background
The polypropylene (PP) is a general material, has the advantages of good mechanical property, no toxicity, heat resistance, chemical resistance, easy processing and forming, low price and the like, and can be widely applied to the industries of chemical industry, building materials, automobiles and the like. But at the same time, the PP also has the defects of poor transparency, poor creep resistance, poor impact resistance, easy aging and the like, and the popularization and the use of the PP are limited. Therefore, extensive and intensive studies have been made on the modification of PP, particularly the modification of impact resistance, at home and abroad.
The impact resistance modification technology mainly comprises copolymerization modification, blending modification, nucleating agent modification and the like, wherein the copolymerization modification is mainly to synthesize polypropylene resin with better performance by changing a catalyst and reaction conditions of polymerization reaction and introducing comonomer and the like, but the polymerization process requirement is high, the polypropylene resin is easy to stick a kettle to cause production stop, and the investment is large.
Chinese patent document 200810207904.6 discloses a polypropylene composite material, the preparation components of which comprise polypropylene, wollastonite, other inorganic fillers, elastomer toughening agents and other additives, etc., and the polypropylene composite material improves the impact resistance thereof by adding the elastomer toughening additives, thereby achieving a certain effect. However, the disadvantages are that the strength, modulus and impact resistance cannot be improved in a balanced manner, the preparation process is complicated and is not easy to control accurately.
Chinese patent 201110113209.5 discloses a polypropylene composition and a preparation method thereof, wherein the composition comprises polypropylene, a toughening agent, inorganic rigid particles, a peroxide crosslinking agent and other auxiliaries. Mainly through generating an impact-resistant auxiliary agent system of inorganic rigid particles coated by a toughening agent in a double-screw extruder, the impact resistance of the polypropylene material is improved. Chinese patent 201210386211.4 discloses a method for preparing elastomer-coated inorganic rigid particle impact-resistant assistant system filled polypropylene. Inorganic rigid particles such as talc, calcium carbonate, zeolite and the like are coated with an elastomer and filled in polypropylene, thereby realizing simultaneous improvement of the rigidity and impact resistance of polypropylene.
Although the inorganic rigid particle assistant or elastomer-coated inorganic rigid particle assistant modified polypropylene can achieve the purpose of improving the performance of polypropylene, the addition amount of the inorganic rigid particles is large, for example, the addition amount of the inorganic rigid particles in Chinese patent document 201110113209.5 and Chinese patent document 201210386211.4 is 5-40%, which greatly improves the ash content of the high impact polypropylene composite material, thereby limiting the application range of the high impact polypropylene composite material.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an auxiliary system, in particular to an auxiliary system for producing high-impact polypropylene and a preparation method and application thereof. The addition of the assistant system provided by the invention can greatly improve the impact resistance of polypropylene, and has no adverse effect on the ash content of high impact polypropylene, thereby expanding the application range of the high impact polypropylene.
The technical scheme of the invention is as follows:
the first aspect of the invention provides an auxiliary agent system of polypropylene, which comprises the following raw materials in parts by weight:
50-90 parts of organic polymer, 4-30 parts of polymer interface binder and 5-15 parts of thermoplastic elastomer; the organic polymer is poly (arylene ether nitrile).
According to the invention, the polypropylene auxiliary agent system comprises the following raw materials in parts by weight:
60-80 parts (such as 65 parts, 70 parts and 75 parts) of organic polymer, 10-20 parts (such as 12 parts, 15 parts and 18 parts) of polymer interface binder and 6-15 parts (such as 8 parts, 10 parts and 12 parts) of thermoplastic elastomer; the organic polymer is poly (arylene ether nitrile).
According to the invention, the polypropylene auxiliary agent system further comprises the following raw materials in parts by weight: 1-5 parts of antioxidant, preferably 3-5 parts of antioxidant;
according to the invention, the organic polymer has a particle size of 0.001 to 1mm, for example 0.025 to 0.5mm, such as 0.025 to 0.075 mm.
According to the invention, the polymer interface binder is one or more of polyethylene-maleic anhydride graft copolymer, polypropylene-maleic anhydride graft copolymer or polybutylene-maleic anhydride graft copolymer.
According to the invention, the thermoplastic elastomer is one or more of ethylene octene elastomer, ethylene propylene diene monomer rubber or styrene-ethylene-butylene-styrene segmented copolymer.
According to the present invention, the antioxidant is an antioxidant known in the art to be suitable for polypropylene systems, such as antioxidant 1010, antioxidant 168, and the like.
In a second aspect, the present invention provides a process for preparing the adjuvant system for polypropylene described above, comprising the steps of:
step S1, mixing the organic polymer, the polymer interface binder, the thermoplastic elastomer and optionally the antioxidant to obtain a primary material;
and step S2, carrying out melt granulation on the uniformly mixed primary material to obtain an auxiliary agent system for producing high impact polypropylene.
According to the present invention, in step S1, the mixing is performed in a high speed mixer for 2 to 10 minutes.
According to the invention, in step S2, the melt granulation is carried out in a screw extruder, and the temperature of the melt granulation is 220-280 ℃.
A third aspect of the present invention is to provide the use of an adjuvant system for polypropylene as described above for the preparation of polypropylene.
The fourth aspect of the invention provides a polypropylene composition, which comprises the following components in parts by weight: 100 parts of polypropylene, 2-15 parts of an auxiliary agent system of the polypropylene and optionally 0.01-1 part of an antioxidant.
According to the invention, the polypropylene composition comprises the following components in parts by weight: 100 parts of polypropylene, 3-10 parts of an auxiliary agent system of the polypropylene and optionally 0.05-0.5 part of an antioxidant.
According to the invention, the polypropylene composition comprises the following components in parts by weight: 100 parts of polypropylene, 4-6 parts of an auxiliary agent system of the polypropylene and optionally 0.1-0.4 part of an antioxidant.
According to the invention, the polypropylene is any molecular weight and polymeric form of polypropylene known in the art, for example homo-or co-polypropylene, such as can be selected from homo-polypropylene T30S or co-polypropylene K8003.
According to the present invention, the antioxidant is an antioxidant known in the art to be suitable for polypropylene systems, such as antioxidant 1010, antioxidant 168, and the like.
In a fifth aspect of the present invention, there is provided a polypropylene, which is prepared from the polypropylene composition as described above.
The sixth aspect of the present invention provides a process for producing the above-mentioned polypropylene, which comprises the steps of:
(S1) mixing polypropylene, an auxiliary agent system of the polypropylene and an optional antioxidant to obtain a primary material;
(S2) melting and granulating the uniformly mixed initial material to obtain the polypropylene.
According to the present invention, (S1), the mixing is mixing in a high-speed mixer for 2 to 10 minutes.
According to the present invention, (S2), the melt granulation is performed in a screw extruder, and the temperature of the melt granulation is 220-280 ℃.
The invention has the beneficial effects that:
the invention provides an auxiliary system for producing high impact polypropylene, a preparation method and application thereof, wherein the auxiliary system comprises organic polymer poly (arylene ether nitrile), and polymer interface binder and elastomer are added to improve the compatibility between poly (arylene ether nitrile) and polypropylene, so that the impact strength and tensile strength of a polypropylene material obtained by using the auxiliary system are improved, the rigidity and toughness balance is better, inorganic rigid particles are not required to be added, the ash content is not adversely affected, the application range of the high impact polypropylene is expanded, and the high impact polypropylene has good industrial prospect.
Detailed Description
The preparation method of the present invention will be described in further detail with reference to specific examples. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
The experimental methods used in the following examples are all conventional methods unless otherwise specified; reagents, materials and the like used in the following examples are commercially available unless otherwise specified.
The tensile strength in the following examples was measured in accordance with GB/T1040-.
Example 1
Step one, weighing 60 parts (0.025mm) of poly (arylene ether nitrile), 20 parts of polyethylene-maleic anhydride graft copolymer, 15 parts of ethylene octene elastomer and 10105 parts of antioxidant according to parts by weight. Adding the mixture into a high-speed mixer to be mixed for 20 minutes to obtain a primary material;
and step two, adding the uniformly mixed initial materials into a screw extruder for melting granulation, and setting the melt temperature to 230 ℃ to obtain the aid system for producing the high impact polypropylene.
100 parts of homo-polypropylene T30S, 5% of the aid system, 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168 are weighed and added into a high-speed mixer for mixing for 2 minutes, the uniformly mixed materials are added into a screw extruder for melt extrusion granulation, the melt temperature is set to 230 ℃, modified high-impact polypropylene resin is obtained, the tensile strength, the flexural modulus and the simply supported beam notch impact strength of the prepared modified high-impact polypropylene resin are respectively measured for testing, and the detection results are shown in Table 1.
Example 2
Step one, weighing 70 parts (0.025mm) of poly (arylene ether nitrile), 15 parts of polypropylene-maleic anhydride graft copolymer, 12 parts of ethylene propylene diene monomer and 10103 parts of antioxidant according to parts by weight. Adding the mixture into a high-speed mixer to be mixed for 20 minutes to obtain a primary material;
and step two, adding the uniformly mixed initial materials into a screw extruder for melting granulation, and setting the melt temperature to 230 ℃ to obtain the aid system for producing the high impact polypropylene.
100 parts of homo-polypropylene T30S, 4% of the aid system, 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168 are weighed and added into a high-speed mixer for mixing for 2 minutes, the uniformly mixed materials are added into a screw extruder for melt extrusion granulation, the melt temperature is set to 230 ℃, modified high-impact polypropylene resin is obtained, the tensile strength, the flexural modulus and the simply supported beam notch impact strength of the prepared modified high-impact polypropylene resin are respectively measured for testing, and the detection results are shown in Table 1.
Example 3
Weighing 80 parts (0.05mm) of poly (arylene ether nitrile), 10 parts of polypropylene-maleic anhydride graft copolymer, 6 parts of styrene-ethylene-butylene-styrene block copolymer and 10104 parts of antioxidant according to parts by weight. Adding the mixture into a high-speed mixer to be mixed for 20 minutes to obtain a primary material;
and step two, adding the uniformly mixed initial materials into a screw extruder for melting granulation, and setting the melt temperature to 230 ℃ to obtain the aid system for producing the high impact polypropylene.
100 parts of homo-polypropylene T30S, 4% of the aid system, 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168 are weighed and added into a high-speed mixer for mixing for 2 minutes, the uniformly mixed materials are added into a screw extruder for melt extrusion granulation, the melt temperature is set to 230 ℃, modified high-impact polypropylene resin is obtained, the tensile strength, the flexural modulus and the simply supported beam notch impact strength of the prepared modified high-impact polypropylene resin are respectively measured for testing, and the detection results are shown in Table 1.
Example 4
Firstly, weighing 65 parts (0.075mm) of poly (arylene ether nitrile), 20 parts of polybutylene-maleic anhydride graft copolymer, 10 parts of ethylene octene elastomer, 10102.5 parts of antioxidant and 1682.5 parts of antioxidant. Adding the mixture into a high-speed mixer to be mixed for 20 minutes to obtain a primary material;
and step two, adding the uniformly mixed initial materials into a screw extruder for melting granulation, and setting the melt temperature to 230 ℃ to obtain the aid system for producing the high impact polypropylene.
100 parts of homo-polypropylene T30S, 5% of the aid system, 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168 are weighed and added into a high-speed mixer for mixing for 2 minutes, the uniformly mixed materials are added into a screw extruder for melt extrusion granulation, the melt temperature is set to 230 ℃, modified high-impact polypropylene resin is obtained, the tensile strength, the flexural modulus and the simply supported beam notch impact strength of the prepared modified high-impact polypropylene resin are respectively measured for testing, and the detection results are shown in Table 1.
Example 5
Step one, weighing 60 parts (0.025mm) of poly (arylene ether nitrile), 20 parts of polyethylene-maleic anhydride graft copolymer, 15 parts of ethylene octene elastomer and 10105 parts of antioxidant according to parts by weight. Adding the mixture into a high-speed mixer to be mixed for 20 minutes to obtain a primary material;
and step two, adding the uniformly mixed initial materials into a screw extruder for melting granulation, and setting the melt temperature to 230 ℃ to obtain the aid system for producing the high impact polypropylene.
Weighing 100 parts of copolymerized polypropylene K8003, 5% of the aid system, 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168, adding the materials into a high-speed mixer, mixing for 2 minutes, adding the uniformly mixed materials into a screw extruder, carrying out melt extrusion granulation, setting the melt temperature to 230 ℃, obtaining the modified high-impact polypropylene resin, and respectively measuring the tensile strength, the bending modulus and the simply supported beam notch impact strength of the prepared modified high-impact polypropylene resin, wherein the detection results are shown in Table 1.
Example 6
Step one, weighing 70 parts (0.025mm) of poly (arylene ether nitrile), 15 parts of polypropylene-maleic anhydride graft copolymer, 12 parts of ethylene propylene diene monomer and 10103 parts of antioxidant according to parts by weight. Adding the mixture into a high-speed mixer to be mixed for 20 minutes to obtain a primary material;
and step two, adding the uniformly mixed initial materials into a screw extruder for melting granulation, and setting the melt temperature to 230 ℃ to obtain the aid system for producing the high impact polypropylene.
Weighing 100 parts of the polypropylene copolymer K8003, 4% of the aid system, 0.1 part of the antioxidant 1010 and 0.1 part of the antioxidant 168, adding the materials into a high-speed mixer, mixing for 2 minutes, adding the uniformly mixed materials into a screw extruder, carrying out melt extrusion granulation, setting the melt temperature to 230 ℃, obtaining the modified high-impact polypropylene resin, and respectively measuring the tensile strength, the flexural modulus and the simply supported beam notch impact strength of the prepared modified high-impact polypropylene resin, wherein the detection results are shown in Table 1.
Example 7
Weighing 80 parts (0.05mm) of poly (arylene ether nitrile), 10 parts of polypropylene-maleic anhydride graft copolymer, 6 parts of styrene-ethylene-butylene-styrene block copolymer and 10104 parts of antioxidant according to parts by weight. Adding the mixture into a high-speed mixer to be mixed for 20 minutes to obtain a primary material;
and step two, adding the uniformly mixed initial materials into a screw extruder for melting granulation, and setting the melt temperature to 230 ℃ to obtain the aid system for producing the high impact polypropylene.
Weighing 100 parts of the polypropylene copolymer K8003, 4% of the aid system, 0.1 part of the antioxidant 1010 and 0.1 part of the antioxidant 168, adding the materials into a high-speed mixer, mixing for 2 minutes, adding the uniformly mixed materials into a screw extruder, carrying out melt extrusion granulation, setting the melt temperature to 230 ℃, obtaining the modified high-impact polypropylene resin, and respectively measuring the tensile strength, the flexural modulus and the simply supported beam notch impact strength of the prepared modified high-impact polypropylene resin, wherein the detection results are shown in Table 1.
Example 8
Firstly, weighing 65 parts (0.075mm) of poly (arylene ether nitrile), 20 parts of polybutylene-maleic anhydride graft copolymer, 10 parts of ethylene octene elastomer, 10102.5 parts of antioxidant and 1682.5 parts of antioxidant. Adding the mixture into a high-speed mixer to be mixed for 20 minutes to obtain a primary material;
and step two, adding the uniformly mixed initial materials into a screw extruder for melting granulation, and setting the melt temperature to 230 ℃ to obtain the aid system for producing the high impact polypropylene.
Weighing 100 parts of copolymerized polypropylene K8003, 5% of the aid system, 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168, adding the materials into a high-speed mixer, mixing for 2 minutes, adding the uniformly mixed materials into a screw extruder, carrying out melt extrusion granulation, setting the melt temperature to 230 ℃, obtaining the modified high-impact polypropylene resin, and respectively measuring the tensile strength, the bending modulus and the simply supported beam notch impact strength of the prepared modified high-impact polypropylene resin, wherein the detection results are shown in Table 1.
Comparative example 1
Adding 100 parts by weight of homo-polypropylene T30S, 0.1 part by weight of calcium stearate, 0.1 part by weight of antioxidant 1010 and 0.1 part by weight of antioxidant 168 into a high-speed mixer, and mixing for 5 minutes to obtain a primary material; and adding the uniformly mixed initial material into a screw extruder for melt extrusion granulation, wherein the melt temperature is set to 230 ℃, and obtaining the modified polypropylene resin.
Comparative example 2
Adding 100 parts by weight of polypropylene copolymer K8003, 0.1 part by weight of zinc stearate, 0.1 part by weight of antioxidant 1010 and 0.1 part by weight of antioxidant 168 into a high-speed mixer, and mixing for 5 minutes to obtain a primary material; and adding the uniformly mixed initial material into a screw extruder for melt extrusion granulation, wherein the melt temperature is set to 240 ℃, and obtaining the modified polypropylene resin.
Comparative example 3
Step one, weighing 100 parts (0.025mm) of poly (arylene ether nitrile) and 10105 parts of antioxidant by weight, and adding the poly (arylene ether nitrile) and the 10105 parts of antioxidant into a high-speed mixer to mix for 20 minutes to obtain a contrast aid system.
Step two, weighing 100 parts of homo-polypropylene T30S and 5% of the above comparative aid system, adding 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168 into a high-speed mixer for mixing for 2 minutes, adding the uniformly mixed materials into a screw extruder for melt extrusion granulation, setting the melt temperature at 230 ℃ to obtain modified polypropylene resin, and respectively measuring the tensile strength, the bending modulus and the impact strength of the notch of the simply supported beam of the prepared modified polypropylene resin, wherein the detection results are shown in Table 1.
Comparative example 4
Step one, weighing 20 parts of polyethylene-maleic anhydride graft copolymer, 15 parts of ethylene octene elastomer and 10105 parts of antioxidant according to parts by weight. Adding the mixture into a high-speed mixer and mixing for 20 minutes to obtain a primary material.
And step two, adding the uniformly mixed initial materials into a screw extruder for melting granulation, and setting the melt temperature to 230 ℃ to obtain a contrast aid system.
100 parts of homo-polypropylene T30S, 5% of the above comparative aid system, 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168 are weighed and added into a high-speed mixer for mixing for 2 minutes, the uniformly mixed materials are added into a screw extruder for melt extrusion granulation, the melt temperature is set to 230 ℃, modified polypropylene resin is obtained, the tensile strength, the flexural modulus and the impact strength of a simply supported beam notch of the prepared modified polypropylene resin are respectively measured, and the detection results are shown in Table 1.
Comparative example 5
Step one, weighing 60 parts of calcium carbonate, 20 parts of polyethylene-maleic anhydride graft copolymer, 15 parts of ethylene octene elastomer and 10105 parts of antioxidant according to parts by weight. Adding the mixture into a high-speed mixer to be mixed for 20 minutes to obtain a primary material;
and step two, adding the uniformly mixed initial materials into a screw extruder for melting granulation, and setting the melt temperature to 230 ℃ to obtain a contrast aid system.
100 parts of homo-polypropylene T30S, 5% of the above comparative aid system, 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168 are weighed and added into a high-speed mixer for mixing for 2 minutes, the uniformly mixed materials are added into a screw extruder for melt extrusion granulation, the melt temperature is set to 230 ℃, modified polypropylene resin is obtained, the tensile strength, the flexural modulus and the impact strength of a simply supported beam notch of the prepared modified polypropylene resin are respectively measured, and the detection results are shown in Table 1.
TABLE 1 Properties of Polypropylene resins of examples 1 to 8 and comparative examples 1 to 5
Figure BDA0001928503740000101
Figure BDA0001928503740000111
As can be seen from Table 1, the additive system according to the present invention, when applied to homo-polypropylene and co-polypropylene, greatly improves the impact resistance of polypropylene, and also improves the rigidity to a certain extent, and has good balance between rigidity and toughness.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An auxiliary agent system of polypropylene comprises the following raw materials in parts by weight:
50-90 parts of organic polymer, 4-30 parts of polymer interface binder and 5-15 parts of thermoplastic elastomer; the organic polymer is poly (arylene ether nitrile).
2. The polypropylene additive system according to claim 1, wherein the polypropylene additive system comprises the following raw materials in parts by weight:
60-80 parts of organic polymer, 10-20 parts of polymer interface binder and 6-15 parts of thermoplastic elastomer; the organic polymer is poly (arylene ether nitrile).
3. The polypropylene additive system according to claim 1 or 2, further comprising the following raw materials in parts by weight: 1-5 parts of antioxidant, preferably 3-5 parts of antioxidant.
4. An auxiliary system for polypropylene according to any one of claims 1 to 3, wherein said organic polymer has a particle size of 0.001 to 1mm, such as 0.025 to 0.5mm, e.g. 0.025 to 0.075 mm.
Preferably, the polymer interfacial binder is one or more of polyethylene-maleic anhydride graft copolymer, polypropylene-maleic anhydride graft copolymer or polybutylene-maleic anhydride graft copolymer.
Preferably, the thermoplastic elastomer is one or more of ethylene octene elastomer, ethylene propylene diene monomer rubber or styrene-ethylene-butylene-styrene block copolymer.
5. Process for the preparation of an adjuvant system for polypropylene according to any of claims 1 to 4, comprising the steps of:
step S1, mixing the organic polymer, the polymer interface binder, the thermoplastic elastomer and optionally the antioxidant to obtain a primary material;
and step S2, carrying out melt granulation on the uniformly mixed primary material to obtain an auxiliary agent system for producing high impact polypropylene.
Preferably, in step S1, the mixing is in a high speed mixer for 2-10 minutes.
Preferably, in step S2, the melt granulation is performed in a screw extruder, and the temperature of the melt granulation is 220-280 ℃.
6. Use of an adjuvant system for polypropylene according to any one of claims 1 to 4 for the preparation of polypropylene.
7. The polypropylene composition comprises the following components in parts by weight: 100 parts of polypropylene, 2-15 parts of an auxiliary agent system of the polypropylene and optionally 0.01-1 part of an antioxidant.
8. The polypropylene composition according to claim 7, wherein the polypropylene composition comprises the following components in parts by weight: 100 parts of polypropylene, 3-10 parts of an auxiliary agent system of the polypropylene and optionally 0.05-0.5 part of an antioxidant.
Preferably, the polypropylene composition comprises the following components in parts by weight: 100 parts of polypropylene, 4-6 parts of an auxiliary agent system of the polypropylene and optionally 0.1-0.4 part of an antioxidant.
9. A polypropylene produced from the polypropylene composition of claim 7 or 8.
10. A process for the preparation of the polypropylene according to claim 9, comprising the steps of:
(S1) mixing polypropylene, an auxiliary agent system of the polypropylene and an optional antioxidant to obtain a primary material;
(S2) melting and granulating the uniformly mixed initial material to obtain the polypropylene.
Preferably, in (S1), the mixing is in a high speed mixer for 2 to 10 minutes.
Preferably, (S2), the melt granulation is performed in a screw extruder, and the temperature of the melt granulation is 220-280 ℃.
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CN115109340A (en) * 2021-03-23 2022-09-27 中国石油天然气股份有限公司 Preparation method of modified polypropylene and polypropylene composition

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