CN111454515A - Rigidity-enhancing and toughening antistatic polypropylene master batch and preparation method thereof - Google Patents

Rigidity-enhancing and toughening antistatic polypropylene master batch and preparation method thereof Download PDF

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CN111454515A
CN111454515A CN202010314879.2A CN202010314879A CN111454515A CN 111454515 A CN111454515 A CN 111454515A CN 202010314879 A CN202010314879 A CN 202010314879A CN 111454515 A CN111454515 A CN 111454515A
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rigidity
agent
toughening
enhancing
antistatic
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姚春生
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Panjin Haixing Technology Co ltd
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Panjin Haixing Technology Co ltd
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Abstract

The invention discloses a rigidity-enhancing and toughening antistatic polypropylene master batch and a preparation method thereof, wherein the polypropylene master batch comprises, by mass, 75-95 parts of polypropylene resin and 5-25 parts of a rigidity-enhancing agent, the total amount of the polypropylene resin and the rigidity-enhancing agent is 100 parts, the polypropylene master batch further comprises a toughening agent, an antistatic agent, an antioxidant and a lubricant, the dosage of the toughening agent is 1% -8% of the total mass of the polypropylene resin and the rigidity-enhancing agent, the dosage of the antistatic agent is 0.1% -3.0% of the total mass of the polypropylene resin and the rigidity-enhancing agent, the dosage of the antioxidant is 0.1% -0.5% of the total mass of the polypropylene resin and the rigidity-enhancing agent, the dosage of the lubricant is 0.5% -2.0% of the total mass of the polypropylene resin and the rigidity-enhancing agent, and the antistatic agent is at least one of cationic amine salt, 1- β -hydroxyethyl-2-alkyl-2-imidazoline salt, dialkyl dimethyl quaternary ammonium salt, alkyl benzyl quaternary ammonium salt and N, N dialkyl morpholine salt.

Description

Rigidity-enhancing and toughening antistatic polypropylene master batch and preparation method thereof
Technical Field
The invention relates to the technical field of polypropylene materials, in particular to a rigidity-enhancing and toughening antistatic polypropylene master batch and a preparation method thereof.
Background
Polypropylene (PP) is a semi-crystalline polymer, is one of five general-purpose plastics, has wide application because of rich raw material sources, low price, easy processing and molding and excellent comprehensive performance of products, and is a variety with the shortest development history and the fastest growth in general-purpose thermoplastic resins.
Although PP has high mechanical strength, excellent heat resistance, good corrosion resistance and electrical insulation, outstanding rigidity and bending resistance, and is a rapidly developing species among resins, it has a high electrical insulation property with a surface resistivity of up to 10 due to its low molecular polarity and poor water absorption16～1020Omega m, static electricity is generated and accumulated on the surface of the plastic due to friction, stripping or induction processes in the production and use processes, so that electrostatic hazards such as dust absorption, discharge, breakdown, even combustion or explosion are generated. Especially when the polypropylene is used for producing and using household storage articles, the appearance of the articles is seriously influenced by electrostatic dust absorption. Therefore, antistatic polypropylene materials have become one of the important directions in the field of polypropylene plastic modification.
There are many methods for antistatic plastic articles, and roughly include three types of use of a conductive device, surface treatment of the article, and addition of a conductive biomass (antistatic agent). The use of antistatic agents is the most common and practical means in the antistatic technology field today, taking into account a number of factors such as cost, efficiency, processability, etc.
The antistatic agent is added into the resin to prevent high molecular weightA class of chemical additives to the electrostatic hazard of the submaterials. The antistatic agent is used for reducing the resistivity of the surface layer of the high-molecular material with high volume resistance to 1010Omega.m or less, thereby reducing the electrostatic accumulation of the polymer material during the processing and use. The antistatic agent is used for effectively leaking static charges accumulated on the surface of a product in a surface conduction mode to realize an antistatic effect, and the static charges can be directly coated on the surface of the product (an external antistatic agent is poor in durability, is frequently used for temporary or short-term static treatment and is narrow in application range), or can be mixed in resin (an internal antistatic agent) during plastic molding, and the mixture is transferred to the surface after a period of time to finally form a surface antistatic agent molecular layer. Since they are blended with the resin composition and have good durability, the internal antistatic agent is also called a "permanent" antistatic agent.
The ideal antistatic agent has moderate compatibility with plastic and other substrates, can be well compatible with resin during mixing and melt processing, and can not be obviously sprayed and separated out after molding, but the antistatic agent and the resin also have certain incompatibility so as to ensure that when a molecular layer of the antistatic agent on the surface is damaged, the antistatic agent in the antistatic agent can be timely separated out to form a new molecular layer, and the antistatic efficiency is recovered.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the rigidity-enhancing and toughening antistatic polypropylene master batch and the preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following components in parts by mass: 75-95 parts of polypropylene resin and 5-25 parts of stiffening agent, wherein the total weight of the polypropylene resin and the stiffening agent is 100 parts, the polypropylene master batch further comprises a toughening agent, an antistatic agent, an antioxidant and a lubricant, the dosage of the toughening agent is 1-8% of the total weight of the polypropylene resin and the stiffening agent, the dosage of the antistatic agent is 0.1-3.0% of the total weight of the polypropylene resin and the stiffening agent, the dosage of the antioxidant is 0.1-0.5% of the total weight of the polypropylene resin and the stiffening agent, and the dosage of the lubricant is 0.5-2.0% of the total weight of the polypropylene resin and the stiffening agent;
the antistatic agent is at least one of cationic amine salt, 1- β -hydroxyethyl-2-alkyl-2-imidazoline salt, dialkyl dimethyl quaternary ammonium salt, alkyl dimethyl benzyl quaternary ammonium salt and N, N dialkyl morpholine salt.
Compared with other types of antistatic agents, the antistatic agent selected by the invention is a cationic internal antistatic agent, has more proper compatibility with polypropylene resin during mixing and melt processing, can not be obviously frosted and separated out after forming, and can be separated out in time when a molecular layer of the antistatic agent on the surface is damaged to form a new molecular layer and restore the antistatic efficiency. The antistatic agent selected by the invention has stronger adhesive force to the polypropylene material, and can obviously improve the antistatic performance of the polypropylene material.
According to the invention, the antistatic performance, rigidity and toughness of the polypropylene material can be improved by preferably selecting the dosage proportion of the polypropylene resin, the stiffening agent toughening agent, the antistatic agent, the antioxidant and the lubricant, and preferably selecting the proper type of antistatic agent.
Preferably, the rigidity-enhancing and toughening antistatic polypropylene master batch is characterized by comprising the following components in parts by mass: 80-90 parts of polypropylene resin and 10-20 parts of stiffening agent, wherein the total amount of the polypropylene resin and the stiffening agent is 100 parts, the amount of the toughening agent is 5-8% of the total mass of the polypropylene resin and the stiffening agent, the amount of the antistatic agent is 1.5-2% of the total mass of the polypropylene resin and the stiffening agent, the amount of the antioxidant is 0.2-0.3% of the total mass of the polypropylene resin and the stiffening agent, and the amount of the lubricant is 0.8-1.2% of the total mass of the polypropylene resin and the stiffening agent, so that the antistatic performance of the polypropylene master batch can be improved.
Preferably, the polypropylene resin is a copolymer polypropylene resin or a homopolymer polypropylene resin, and the melt mass flow rate of the polypropylene resin is 1-60 g/10min at 230 ℃ under a load of 2.16 Kg.
Preferably, the stiffening agent is at least one of calcium carbonate, wollastonite, alumina powder and talcum powder, and can reduce the shrinkage rate of the polypropylene resin and improve the strength of the product, so that the deformation and the warpage of the polypropylene product are reduced.
Preferably, the calcium carbonate is light calcium carbonate, and the relative density is 2.7-2.9 g/cm3The sedimentation volume is not less than 2.5ml/g, and the specific surface area is 5m2(ii)/g; the wollastonite is wollastonite powder, and the relative density of the wollastonite powder is 2.18-2.91 g/cm3The Rockwell hardness is 4.5-5.0; the mesh number of the alumina powder is 250-300, and the density is 3.9-4.0 g/cm3(ii) a The particle size of the talcum powder is 600-2500 meshes, and the bulk density is 0.55g/cm3The volume compactness is 0.95g/cm3。
Preferably, the toughening agent is at least one of EPDM, EVA, SBS, POE and TPE, which is beneficial to increasing the toughness of the polypropylene resin and improving the normal temperature and low temperature impact performance of the product.
Preferably, the antioxidant is at least one of a poly hindered phenol type antioxidant and a phosphite type antioxidant.
Preferably, the mass ratio of the multi-element hindered phenol antioxidant to the phosphite antioxidant in the antioxidant is 2: 1.
Preferably, the lubricant is at least one of calcium stearate, zinc stearate, cadmium stearate and magnesium stearate.
The invention also provides a preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch, which comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) and (3) adding the uniformly mixed material in the step (2) into a double-screw extruder, and carrying out melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening antistatic polypropylene master batch.
Preferably, the mixing process parameters are as follows: the rotating speed is 1200-1800 r/min, and the time is 4-7 min;
the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃ to 240 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. the cationic internal antistatic agent which is compatible with the resin and is suitable for the resin is added into the polypropylene resin, so that the high-molecular material antistatic polypropylene resin has strong adhesive force, excellent antistatic performance and good antistatic durability; the antistatic agent overcomes the defects that the conventional antistatic agent cannot smoothly migrate in resin and cannot fully exert the antistatic effect because of poor compatibility with the resin, and also overcomes the defects that the antistatic agent has poor compatibility with the resin, the migration speed of the antistatic agent is too high, and obvious frost precipitation is generated after molding.
2. The addition of the stiffening agent reduces the shrinkage rate of the polypropylene resin, improves the strength of the product and reduces the deformation and warpage of the product; the introduction of the toughening agent increases the toughness of the polypropylene resin and improves the normal-temperature and low-temperature impact properties of the product. Therefore, the introduction of the stiffening agent and the toughening agent can enable the application range of the polypropylene resin of the invention to cover all brands of polypropylene, so that the conventional polypropylene has both antistatic performance and enhanced mechanical property, and polypropylene master batches with different performances and different purposes can be obtained by adjusting the addition amount of the conventional polypropylene.
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. It will be understood by those skilled in the art that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the examples, the experimental methods used were all conventional methods unless otherwise specified, and the materials, reagents and the like used were commercially available without otherwise specified.
Example 1
The rigidity-enhancing and toughening antistatic polypropylene master batch comprises, by mass, 85 parts of homopolypropylene, 15 parts of rigidity-enhancing agent calcium carbonate, 5 parts of toughening agent POE, 2 parts of antistatic agent 1- β -hydroxyethyl-2-alkyl-2-imidazoline salt, 2150.3 parts of antioxidant B and 1.2 parts of lubricant calcium stearate, wherein the calcium carbonate is light calcium carbonateCalcium carbonate having a relative density of 2.8g/cm3The sedimentation volume is 2.7ml/g, the specific surface area is 5m2The homopolypropylene has a melt mass flow rate of 44g/10min at 230 ℃ under a load of 2.16 Kg.
The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1500r/min, and the time is 6 min; the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃.
Example 2
The rigidity-enhancing and toughening antistatic polypropylene master batch comprises, by mass, 80 parts of homopolymerized polypropylene, 20 parts of rigidity-enhancing agent aluminum dioxide, 5 parts of toughening agent EPDM (ethylene-propylene-diene monomer), 1.5 parts of antistatic agent 1- β -hydroxyethyl-2-alkyl-2-imidazoline salt, 2150.2 parts of antioxidant B and 0.8 part of lubricant calcium stearate, wherein the mesh number of the aluminum dioxide is 280, and the density is 4.0g/cm3The homopolypropylene had a melt mass flow rate of 44g/10min at 230 ℃ under a load of 2.16 Kg.
The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1500r/min, and the time is 6 min;
the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃.
Example 3
The rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following components in parts by weight: 90 parts of homopolymerized polypropylene, 10 parts of stiffening agent calcium carbonate, 8 parts of toughening agent EPDM (ethylene-propylene-diene monomer), 2 parts of antistatic agent dialkyl dimethyl quaternary ammonium salt, 2150.3 parts of antioxidant B and 1.2 parts of lubricant calcium stearate, wherein the calcium carbonate is light calcium carbonate and has the relative density of 2.8g/cm3The sedimentation volume is 2.7ml/g, the specific surface area is 5m2The homopolypropylene has a melt mass flow rate of 44g/10min at 230 ℃ under a load of 2.16 Kg.
The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1500r/min, and the time is 6 min; the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃.
Example 4
The rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following components in parts by weight: 75 parts of homopolymerized polypropylene, 25 parts of stiffening agent talcum powder, 8 parts of toughening agent POE, 1 part of antistatic agent N, N dialkyl morpholine salt, 2150.1 parts of antioxidant B and 2.0 parts of lubricant calcium stearate, wherein the particle size of the talcum powder is 2000 meshes, and the volume bulk density is 0.55g/cm3The volume compactness is 0.95g/cm3The homopolypropylene had a melt mass flow rate of 44g/10min at 230 ℃ under a load of 2.16 Kg.
The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1500r/min, and the time is 6 min; the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃.
Example 5
The rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following components in parts by weight: 95 parts of homopolymerized polypropylene, 5 parts of stiffening agent aluminum dioxide, 3 parts of toughening agent TPE, 2 parts of antistatic agent N, N dialkyl morpholine salt, 2150.2 parts of antioxidant B and 1.0 part of lubricant cadmium stearate, wherein the mesh number of the aluminum dioxide is 280, and the density is 4.0g/cm3The homopolypropylene had a melt mass flow rate of 44g/10min at 230 ℃ under a load of 2.16 Kg.
The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1500r/min, and the time is 6 min; the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃.
Example 6
The rigidity-enhancing and toughening antistatic polypropylene master batch comprises, by mass, 85 parts of copolymerized polypropylene, 15 parts of rigidity-enhancing agent calcium carbonate, 5 parts of toughening agent POE, 2 parts of antistatic agent 1- β -hydroxyethyl-2-alkyl-2-imidazoline salt, 2150.3 parts of antioxidant B and 1.2 parts of lubricant calcium stearate, wherein the calcium carbonate is light calcium carbonate with a relative density of 2.8g/cm3The sedimentation volume is 2.7ml/g, the specific surface area is 5m2The melt mass flow rate of the polypropylene copolymer at 230 ℃ under a load of 2.16Kg is 30g/10 min.
The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1200r/min, and the time is 7 min; the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 240 ℃.
Example 7
The rigidity-enhancing and toughening antistatic polypropylene master batch comprises, by mass, 80 parts of copolymerized polypropylene, 20 parts of rigidity-enhancing agent aluminum dioxide, 5 parts of toughening agent EPDM (ethylene-propylene-diene monomer), 1.5 parts of antistatic agent 1- β -hydroxyethyl-2-alkyl-2-imidazoline salt, 2150.2 parts of antioxidant B and 0.8 part of lubricant calcium stearate, wherein the mesh number of the aluminum dioxide is 280, and the density is 4.0g/cm3The melt mass flow rate of the polypropylene copolymer was 30g/10min at 230 ℃ under a load of 2.16 Kg.
The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1800r/min, and the time is 4 min; the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 240 ℃.
Example 8
Rigidity increasing deviceThe toughened antistatic polypropylene master batch comprises the following components in parts by mass: 90 parts of polypropylene copolymer, 10 parts of stiffening agent calcium carbonate, 8 parts of toughening agent EPDM (ethylene-propylene-diene monomer), 2 parts of antistatic agent dialkyl dimethyl quaternary ammonium salt, 2150.3 parts of antioxidant B and 1.2 parts of lubricant calcium stearate, wherein the calcium carbonate is light calcium carbonate and has the relative density of 2.8g/cm3The sedimentation volume is 2.7ml/g, the specific surface area is 5m2The melt mass flow rate of the polypropylene copolymer at 230 ℃ under a load of 2.16Kg is 30g/10 min.
The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1200r/min, and the time is 5 min; the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃.
Example 9
The rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following components in parts by weight: 75 parts of polypropylene copolymer, 25 parts of stiffening agent talcum powder, 8 parts of toughening agent POE, 1 part of antistatic agent N, N dialkyl morpholine salt, 2150.1 parts of antioxidant B and 2.0 parts of lubricant calcium stearate, wherein the particle size of the talcum powder is 2000 meshes, and the volume bulk density is 0.55g/cm3The volume compactness is 0.95g/cm3The melt mass flow rate of the polypropylene copolymer was 30g/10min at 230 ℃ under a load of 2.16 Kg.
The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1200r/min, and the time is 5 min; the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃.
Example 10
The rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following components in parts by weight: 95 parts of polypropylene copolymer, 5 parts of aluminum dioxide serving as a stiffening agent, 3 parts of TPE (thermoplastic elastomer), 2 parts of N, N dialkyl morpholine salt serving as an antistatic agent, 2150.2 parts of antioxidant B and 1.0 part of cadmium stearate serving as a lubricant, wherein the mesh number of the aluminum dioxide is 280, and the density of the aluminum dioxide is 4.0g/cm3The melt mass flow rate of the polypropylene copolymer was 30g/10min at 230 ℃ under a load of 2.16 Kg.
The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1200r/min, and the time is 5 min; the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃.
Comparative example 1
The rigidity-enhancing and toughening antistatic polypropylene master batch comprises the following components in parts by weight: 85 parts of homopolymerized polypropylene, 15 parts of stiffening agent calcium carbonate, 5 parts of toughening agent POE, 2 parts of antistatic agent inorganic oxide tin oxide, 2150.3 parts of antioxidant B and 1.2 parts of lubricant calcium stearate, wherein the calcium carbonate is light calcium carbonate with the relative density of 2.8g/cm3The sedimentation volume is 2.7ml/g, the specific surface area is 5m2The homopolypropylene has a melt mass flow rate of 44g/10min at 230 ℃ under a load of 2.16 Kg.
The preparation method of the rigidity-enhancing toughening antistatic polypropylene master batch comprises the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) adding the uniformly mixed materials in the step (2) into a double-screw extruder, and melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening polypropylene master batch, wherein the mixing process parameters are as follows: the rotating speed is 1500r/min, and the time is 6 min; the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃.
The rigidity and toughness enhancing antistatic polypropylene master batches prepared in the above examples and comparative examples are subjected to related performance characterization, the results are shown in table 1, and the specific test methods are as follows:
melt mass flow rate: measured according to GB/T3682;
tensile yield strength: measured according to GB/T1040;
flexural modulus: measured according to GB/T9341;
notched izod impact strength: determined according to GB/T1834;
surface resistivity: tested according to GB/T1410.
TABLE 1
Figure BDA0002458596910000091
Figure BDA0002458596910000101
The results in table 1 show that the polypropylene material prepared by the invention has excellent antistatic property, rigidity and toughness by optimizing the types and the dosage ratios of the polypropylene resin, the stiffening agent, the toughening agent, the antistatic agent, the antioxidant and the lubricant.
The invention is not limited to the stiffening agent of the above embodiment, and the stiffening agent can be adjusted according to actual needs, wherein the calcium carbonate is light calcium carbonate, and the relative density is 2.7E2.9g/cm3The sedimentation volume is not less than 2.5ml/g, and the specific surface area is 5m2(ii)/g; the wollastonite is wollastonite powder, and the relative density of the wollastonite powder is 2.18-2.91 g/cm3The Rockwell hardness is 4.5-5.0; the mesh number of the alumina powder is 250-300, and the density is 3.9-4.0 g/cm3(ii) a The particle size of the talcum powder is 600-2500 meshes, and the bulk density is 0.55g/cm3The volume compactness is 0.95g/cm3。
The polypropylene resin can be selected according to actual needs, is copolymerized polypropylene resin or homopolymerized polypropylene resin, and has a melt mass flow rate of 1-60 g/10min at 230 ℃ under a load of 2.16 Kg.
In the preparation process of the invention, relevant process parameters can be properly adjusted according to actual needs, and the mixing process parameters are as follows: the rotating speed is 1200-1800 r/min, and the time is 4-7 min; the maximum section temperature of the twin-screw extruder is 220 ℃ to 240 ℃.
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 (10)

1. The rigidity-enhancing and toughening antistatic polypropylene master batch is characterized by comprising, by mass, 75-95 parts of polypropylene resin and 5-25 parts of a rigidity-enhancing agent, wherein the total amount of the polypropylene resin and the rigidity-enhancing agent is 100 parts, the polypropylene master batch further comprises a toughening agent, an antistatic agent, an antioxidant and a lubricant, the amount of the toughening agent is 1% -8% of the total mass of the polypropylene resin and the rigidity-enhancing agent, the amount of the antistatic agent is 0.1% -3.0% of the total mass of the polypropylene resin and the rigidity-enhancing agent, the amount of the antioxidant is 0.1% -0.5% of the total mass of the polypropylene resin and the rigidity-enhancing agent, the amount of the lubricant is 0.5% -2.0% of the total mass of the polypropylene resin and the rigidity-enhancing agent, and the antistatic agent is at least one of cationic amine salt, 1- β -hydroxyethyl-2-alkyl-2-imidazoline salt, dialkyl dimethyl quaternary ammonium salt, alkyl dimethyl benzyl quaternary ammonium salt and N, N dialkyl morpholine salt.
2. The rigidity-enhancing and toughening antistatic polypropylene master batch according to claim 1, which is characterized by comprising the following components in parts by mass: 80-90 parts of polypropylene resin and 10-20 parts of stiffening agent, wherein the total amount of the polypropylene resin and the stiffening agent is 100 parts, the amount of the toughening agent is 5-8% of the total mass of the polypropylene resin and the stiffening agent, the amount of the antistatic agent is 1.5-2% of the total mass of the polypropylene resin and the stiffening agent, the amount of the antioxidant is 0.2-0.3% of the total mass of the polypropylene resin and the stiffening agent, and the amount of the lubricant is 0.8-1.2% of the total mass of the polypropylene resin and the stiffening agent.
3. The rigidity-enhancing and toughening antistatic polypropylene master batch according to claim 1, wherein the polypropylene resin is a copolymerized polypropylene resin or a homopolymerized polypropylene resin, and the melt mass flow rate of the polypropylene resin is 1-60 g/10min at 230 ℃ under a load of 2.16 Kg.
4. The rigidity-enhancing and toughening antistatic polypropylene master batch according to claim 1, wherein the rigidity-enhancing agent is at least one of calcium carbonate, wollastonite, alumina powder and talcum powder, preferably, the calcium carbonate is light calcium carbonate, and the relative density is 2.7-2.9 g/cm3The sedimentation volume is not less than 2.5ml/g, and the specific surface area is 5m2(ii)/g; the wollastonite is wollastonite powder, and the relative density of the wollastonite powder is 2.18-2.91 g/cm3The Rockwell hardness is 4.5-5.0; the mesh number of the alumina powder is 250-300, and the density is 3.9-4.0 g/cm3(ii) a The particle size of the talcum powder is 600-2500 meshes, and the bulk density is 0.55g/cm3The volume compactness is 0.95g/cm3。
5. The stiffness-enhancing and toughening antistatic polypropylene master batch according to claim 1, wherein the toughening agent is at least one of EPDM, EVA, SBS, POE and TPE.
6. The rigidity-enhancing and toughening antistatic polypropylene master batch according to claim 1, wherein the antioxidant is at least one of a multi-component hindered phenol antioxidant and a phosphite antioxidant.
7. The rigidity-enhancing and toughening antistatic polypropylene master batch according to claim 6, wherein the mass ratio of the multi-hindered phenol antioxidant to the phosphite antioxidant in the antioxidants is 2: 1.
8. The rigidity-enhancing and toughening antistatic polypropylene master batch according to any one of claims 1 to 7, wherein the lubricant is at least one of calcium stearate, zinc stearate, cadmium stearate and magnesium stearate.
9. The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch of any one of claims 1 to 8, which is characterized by comprising the following steps:
(1) weighing the raw material components according to the mass ratio;
(2) putting the raw material components into a high-speed mixer for dry mixing treatment;
(3) and (3) adding the uniformly mixed material in the step (2) into a double-screw extruder, and carrying out melting, mixing, extruding, cooling, blow-drying and granulating to obtain the rigidity-increasing and toughening antistatic polypropylene master batch.
10. The preparation method of the rigidity-enhancing and toughening antistatic polypropylene master batch according to claim 9, wherein the mixing process parameters are as follows: the rotating speed is 1200-1800 r/min, and the time is 4-7 min;
the double-screw extruder is a co-rotating double-screw extruder, and the highest section temperature of the double-screw extruder is 220 ℃ to 240 ℃.
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CN112920511A (en) * 2021-03-01 2021-06-08 毅芯半导体科技(苏州)有限公司 Special polypropylene material for packaging III-V semiconductor polished wafer and preparation method thereof
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CN114196117A (en) * 2022-01-12 2022-03-18 东莞市迪彩塑胶五金有限公司 Antistatic master batch suitable for low-humidity environment and preparation method thereof
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