CN112409680A - High-thermal-conductivity black master batch and preparation method thereof - Google Patents

High-thermal-conductivity black master batch and preparation method thereof Download PDF

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Publication number
CN112409680A
CN112409680A CN202011307229.1A CN202011307229A CN112409680A CN 112409680 A CN112409680 A CN 112409680A CN 202011307229 A CN202011307229 A CN 202011307229A CN 112409680 A CN112409680 A CN 112409680A
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master batch
mixture
black master
controlled
carbon black
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唐胜
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Maokang Material Science & Technology Changshu Co ltd
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Maokang Material Science & Technology Changshu Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/02—Organic and inorganic ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/20—Carboxylic acid amides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/37—Thiols
    • C08K5/372—Sulfides, e.g. R-(S)x-R'

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention relates to a high-thermal-conductivity black master batch, which comprises 30-40% of carbon black, 38-45% of linear low-density polyethylene, 13-18% of nano graphite, 0.7-1.2% of thiodipropionate, 0.7-1.2% of pentaerythritol ester, 2-5% of vinyl bis stearamide, 2-5% of maleic anhydride grafted polyethylene and the balance of inevitable impurity elements in percentage by weight. Therefore, the molded black master batch has good opening smoothness and high thermal conductivity, the final molding quality of the plastic product is improved, the heat loss in the molding process is reduced, the plastic product can effectively prevent the fracture phenomenon of a melt under high shear rate, the section is endowed with obvious smoothness and brightness, and the subsequent adhesion phenomenon is avoided. In addition, the invention also discloses a preparation method of the high-thermal-conductivity black master batch.

Description

High-thermal-conductivity black master batch and preparation method thereof
Technical Field
The invention relates to the technical field of polymer material manufacturing, in particular to a high-thermal-conductivity black master batch and a preparation method thereof.
Background
The color master batch is a plastic colorant which is well dispersed by a high proportion of pigment or additive and thermoplastic resin, and the selected resin has good wetting and dispersing effects on the colorant and has good compatibility with the material to be colored. Color masterbatch tinting is the most commonly used plastic tinting process today. The colorant dispersed in the carrier is simply mixed with the natural color resin to be used for manufacturing the plastic product. The color master batch is generally composed of three parts, the colorant carrier dispersant is mixed by a high-speed mixing roll, crushed, extruded and drawn into particles, and the color master batch has the obvious advantages of high concentration, good dispersibility, cleanness and the like in the plastic processing process.
Black masterbatch, the most commonly used masterbatch in plastics processing, is a well dispersed plastic colorant made from a high proportion of pigment or additive and thermoplastic resin, the resin selected for this having good wetting and dispersing effects on the colorant and good compatibility with the material to be colored. The black master batch has strong adaptability and easy dispersion, and can be suitable for the processes of most of hot resin injection molding, granule extraction, plate pressing, film blowing, wire rods, pipes and the like.
At present, black master batches on the market have poor opening smoothness and thermal conductivity, and are not beneficial to the molding of plastic products and the control of the final molding quality. Thus, a skilled person is urgently needed to solve the above problems.
Disclosure of Invention
Therefore, in view of the above-mentioned problems and drawbacks, the present inventors have collected relevant information, evaluated and considered in many ways, and continuously conducted experiments and modifications by technicians engaged in the industry for years of research and development experience, which finally resulted in the appearance of the high thermal conductivity black masterbatch.
The invention aims to solve a technical problem of providing a high-thermal-conductivity black master batch which comprises, by weight, 30-40% of carbon black, 38-45% of linear low-density polyethylene, 13-18% of nano graphite, 0.7-1.2% of thiodipropionate, 0.7-1.2% of pentaerythritol ester, 2-5% of vinyl bis-stearamide, 2-5% of maleic anhydride grafted polyethylene and the balance of inevitable impurity elements.
As a further improvement of the technical solution of the present invention, the chemical components by weight percentage are carbon black preferably 35%, linear low density polyethylene preferably 42%, nano graphite preferably 15%, thiodipropionate preferably 1%, pentaerythritol ester preferably 1%, vinyl bis stearamide preferably 3%, maleic anhydride grafted polyethylene preferably 2%, and the balance unavoidable impurity elements.
As a further improvement of the technical scheme of the invention, the DBP oil absorption value of the carbon black is controlled to be 100-120mg/100 g.
In addition, the invention also discloses a preparation method of the high-thermal-conductivity black master batch, which comprises the following steps:
S1) Mixing and stirring;
S2) Banburying:
S3) Extruding-granulating;
S4) Dehydrating;
S5) Sieving;
S6) Demagnetizing;
S7) Homogenizing;
S8) Packaging;
in step S1In the specification: sequentially putting carbon black, linear low-density polyethylene, nano graphite, thiodipropionate, pentaerythritol ester, vinyl bis stearamide and maleic anhydride grafted polyethylene into a stirrer, and stirring and mixing to obtain a mixture a;
in step S2In the specification: continuously adding carbon black and linear low-density polyethylene into the mixture a, and placing the mixture into an internal mixer for internal mixing to obtain a mixture b;
in step S3In the specification: the mixture b was fed to a single screw extruder to extrude linear strands, followed by chopping and pelletizing through a pellet die.
As a further improvement of the technical proposal of the invention, in step S2The internal mixer is preferably a continuous twin-screw internal mixer. In the internal mixing process, the temperature distribution of the internal mixer is that the temperature of a feeding port is controlled to be 44-46 ℃, the temperature of an intermediate refining section is controlled to be 94-96 ℃, the temperature of a discharging port is controlled to be 249-251 ℃ and the water temperature of a rotor is controlled to be 29-31 ℃.
As a further improvement of the technical scheme of the invention, the working rotating speed of the internal mixer is controlled at 400-450 r/Min.
As a further improvement of the technical scheme of the invention, the temperature of the granulating die head is controlled to be 250 ℃, and the temperature of cooling water after granulating is controlled to be 55-70 ℃.
As a further improvement of the technical solution of the present invention, in step S2, in addition to the carbon black and the linear low density polyethylene, an adsorbent is added to the mixture a.
As a further improvement of the technical scheme of the invention, the extrusion pressure of the single-screw extruder is controlled to be 90-120 MPa.
Compared with the prior art, the invention has the beneficial effects that: by controlling the DBP oil absorption value and the particle size of the carbon black and adding thiodipropionate, pentaerythritol ester, vinyl distearamide, maleic anhydride grafted polyethylene and the like in the molding process of the color master batch, the molded black master batch has excellent opening smoothness, the dispersity of the black master batch in a plastic product in the subsequent injection molding process is improved, and the color forming uniformity and consistency of the plastic product are ensured. In addition, the addition of the nano graphite also effectively improves the heat-conducting property of the molded black master batch, on one hand, the uniformity of heating of all areas of the plastic product in the injection molding process is effectively ensured, and further the final quality of a finished product is ensured; on the other hand, the loss of the heat energy in the injection molding process is reduced to a certain extent, and the energy consumption required by the injection molding process is further reduced.
Detailed Description
Example 1
The high-thermal-conductivity black master batch comprises, by weight, 36% of carbon black, 45% of linear low-density polyethylene, 13% of nano graphite, 0.7% of thiodipropionate, 0.7% of pentaerythritol ester, 2% of vinyl bis-stearamide, 2% of maleic anhydride grafted polyethylene and the balance of inevitable impurity elements.
The preparation method of the high-thermal-conductivity black master batch comprises the following steps:
S1) Mixing and stirring;
S2) Banburying:
S3) Extruding-granulating;
S4) Dehydrating;
S5) Sieving;
S6) Demagnetizing;
S7) Homogenizing;
S8) Packaging;
in step S1In the specification: putting 25% of carbon black, 40% of linear low-density polyethylene, 13% of nano graphite, 0.7% of thiodipropionate, 0.7% of pentaerythritol ester, 2% of vinyl bis-stearamide and 2% of maleic anhydride grafted polyethylene into a stirrer in sequence, and stirring and mixing to obtain a mixture a;
in step S2In the specification: continuously adding 11% of carbon black and 5% of linear low-density polyethylene into the mixture a, and placing the mixture into an internal mixer for internal mixing to obtain a mixture b;
in step S3In the specification: the mixture b was fed to a single screw extruder to extrude linear strands, followed by chopping and pelletizing through a pellet die.
Example 2
The high-thermal-conductivity black master batch comprises, by weight, 35% of carbon black, 39% of linear low-density polyethylene, 18% of nano graphite, 1% of thiodipropionate, 1% of pentaerythritol ester, 3% of vinyl bis stearamide, 2% of maleic anhydride grafted polyethylene and the balance of inevitable impurity elements.
The preparation method of the high-thermal-conductivity black master batch comprises the following steps:
S1) Mixing and stirring;
S2) Banburying:
S3) Extruding-granulating;
S4) Dehydrating;
S5) Sieving;
S6) Demagnetizing;
S7) Homogenizing;
S8) Packaging;
in step S1In the specification: putting 25% of carbon black, 35% of linear low-density polyethylene, 15% of nano graphite, 1% of thiodipropionate, 1% of pentaerythritol ester, 3% of vinyl bis-stearamide and 2% of maleic anhydride grafted polyethylene into a stirrer in sequence, and stirring and mixing to obtain a mixture a;
in step S2In the specification: continuously adding 10% of carbon black and 4% of linear low-density polyethylene into the mixture a, and placing the mixture into an internal mixer for internal mixing to obtain a mixture b;
in step S3In the specification: the mixture b was fed to a single screw extruder to extrude linear strands, followed by chopping and pelletizing through a pellet die.
Compared with the first embodiment, in the second embodiment, the opening smoothness of the formed black master batch is improved by more than 3%, and the heat conductivity of the formed black master batch is also improved by 1%.
In addition, it is important to point out that the carbon black and the linear low density polyethylene are added in sequence, that is, most of the carbon black and the linear low density polyethylene are added in the stirring stage, and are mixed with the nano graphite, the thiodipropionate, the pentaerythritol ester, the vinyl bis stearamide and the maleic anhydride grafted polyethylene primarily by vigorous stirring to realize primary dispersion and fusion of the mixture, and the rest of a small amount of the carbon black and the linear low density polyethylene are added in the banburying stage, and the carbon black is oxidized severely at high temperature by heat which is difficult to dissipate under severe frictional heat generation and closed conditions to generate cracking damage, so that the fusion degree of the mixture is further increased, and the formed black master batch is more uniform and fine in color.
Example 3
The high-thermal-conductivity black master batch comprises, by weight, 30% of carbon black, 38% of linear low-density polyethylene, 18% of nano graphite, 1.2% of thiodipropionate, 1.2% of pentaerythritol ester, 5% of vinyl bis-stearamide, 5% of maleic anhydride grafted polyethylene and the balance of inevitable impurity elements.
The preparation method of the high-thermal-conductivity black master batch comprises the following steps:
S1) Mixing and stirring;
S2) Banburying:
S3) Extruding-granulating;
S4) Dehydrating;
S5) Sieving;
S6) Demagnetizing;
S7) Homogenizing;
S8) Packaging;
in step S1In the specification: putting 25% of carbon black, 30% of linear low-density polyethylene, 18% of nano graphite, 1.2% of thiodipropionate, 1.2% of pentaerythritol ester, 5% of vinyl bis stearamide and 5% of maleic anhydride grafted polyethylene into a stirrer in sequence, and stirring and mixing to obtain a mixture a;
in step S2In the specification: continuously adding 5% of carbon black and 8% of linear low-density polyethylene into the mixture a, and placing the mixture into an internal mixer for internal mixing to obtain a mixture b;
in step S3In the specification: the mixture b was fed to a single screw extruder to extrude linear strands, followed by chopping and pelletizing through a pellet die.
Compared with the second embodiment, the thermal conductivity of the black masterbatch formed by the third embodiment is substantially equal, but the opening smoothness is slightly improved (1% -1.5%).
Example 4
The high-thermal-conductivity black master batch comprises, by weight, 30% of carbon black, 37% of linear low-density polyethylene, 19% of nano graphite, 1.2% of thiodipropionate, 1.2% of pentaerythritol ester, 5% of vinyl bis-stearamide, 5% of maleic anhydride grafted polyethylene and the balance of inevitable impurity elements.
The preparation method of the high-thermal-conductivity black master batch comprises the following steps:
S1) Mixing and stirring;
S2) Banburying:
S3) Extruding-granulating;
S4) Dehydrating;
S5) Sieving;
S6) Demagnetizing;
S7) Homogenizing;
S8) Packaging;
in step S1In the specification: putting 25% of carbon black, 30% of linear low-density polyethylene, 18% of nano graphite, 1.2% of thiodipropionate, 1.2% of pentaerythritol ester, 5% of vinyl bis stearamide and 5% of maleic anhydride grafted polyethylene into a stirrer in sequence, and stirring and mixing to obtain a mixture a;
in step S2In the specification: continuously adding 5% of carbon black and 7% of linear low-density polyethylene into the mixture a, and placing the mixture into an internal mixer for internal mixing to obtain a mixture b;
in step S3In the specification: the mixture b was fed to a single screw extruder to extrude linear strands, followed by chopping and pelletizing through a pellet die.
Compared with the third embodiment, the smooth performance of the opening formed by adopting the fourth embodiment is basically equal, but the thermal conductivity is reduced (0.5-0.85%).
Example 5
The high-thermal-conductivity black master batch comprises, by weight, 30% of carbon black, 36% of linear low-density polyethylene, 18% of nano graphite, 1.5% of thiodipropionate, 1.5% of pentaerythritol ester, 6% of vinyl bis stearamide, 6% of maleic anhydride grafted polyethylene and the balance of inevitable impurity elements.
The preparation method of the high-thermal-conductivity black master batch comprises the following steps:
S1) Mixing and stirring;
S2) Banburying：
S3) Extruding-granulating;
S4) Dehydrating;
S5) Sieving;
S6) Demagnetizing;
S7) Homogenizing;
S8) Packaging;
in step S1In the specification: putting 25% of carbon black, 30% of linear low-density polyethylene, 18% of nano graphite, 1.5% of thiodipropionate, 1.5% of pentaerythritol ester, 6% of vinyl bis stearamide and 6% of maleic anhydride grafted polyethylene into a stirrer in sequence, and stirring and mixing to obtain a mixture a;
in step S2In the specification: continuously adding 5% of carbon black and 6% of linear low-density polyethylene into the mixture a, and placing the mixture into an internal mixer for internal mixing to obtain a mixture b;
in step S3In the specification: the mixture b was fed to a single screw extruder to extrude linear strands, followed by chopping and pelletizing through a pellet die.
Compared with the third embodiment, the heat-conducting performance of the molded product obtained by the fourth embodiment is substantially maintained, and the opening smoothness is slightly reduced (0.2% -0.35%).
Example 6
The high-thermal-conductivity black master batch comprises, by weight, 35% of carbon black, 45% of linear low-density polyethylene, 13% of nano graphite, 0.7% of thiodipropionate, 0.7% of pentaerythritol ester, 2% of vinyl bis-stearamide, 2% of maleic anhydride grafted polyethylene and the balance of inevitable impurity elements.
The preparation method of the high-thermal-conductivity black master batch comprises the following steps:
S1) Mixing and stirring;
S2) Banburying:
S3) Extruding-granulating;
S4) Dehydrating;
S5) Sieving;
S6) Demagnetizing;
S7) Homogenizing;
S8) Packaging;
in step S1In the specification: putting 25% of carbon black, 40% of linear low-density polyethylene, 13% of nano graphite, 0.7% of thiodipropionate, 0.7% of pentaerythritol ester, 2% of vinyl bis-stearamide and 2% of maleic anhydride grafted polyethylene into a stirrer in sequence, and stirring and mixing to obtain a mixture a;
in step S2In the specification: continuously adding 10% of carbon black, 5% of linear low density polyethylene and 1% of adsorbent into the mixture a, and placing the mixture into an internal mixer for banburying to obtain a mixture b;
in step S3In the specification: the mixture b was fed to a single screw extruder to extrude linear strands, followed by chopping and pelletizing through a pellet die.
In the sixth embodiment, compared with the first embodiment, the opening smoothness and the thermal conductivity of the formed black master batch are slightly improved, and the width is not obvious.
The addition of the adsorbent can improve the surface activity of the black master batch molding mixture to a certain extent, and is beneficial to realizing uniform mixing. In addition, the device can also adsorb chemical gas released by the mixture in the banburying process, and ensures that a good tool environment is formed in a forming workshop.
While for the six embodiments described above, the internal mixer is preferably a continuous twin screw internal mixer. In the internal mixing process, the temperature distribution of the internal mixer is that the temperature of a feeding port is controlled to be 44-46 ℃, the temperature of an intermediate refining section is controlled to be 94-96 ℃, the temperature of a discharging port is controlled to be 249-251 ℃ and the water temperature of a rotor is controlled to be 29-31 ℃. The homogeneity and the activation of the finally obtained internal mixing mixture b are ensured by controlling the working temperature of the mixture a in each stage of internal mixing. Generally, the working speed of the internal mixer is controlled at 400-450 r/Min.
Further, the extrusion pressure of the single-screw extruder is preferably controlled to 90 to 120 MPa. And in view of ensuring smooth execution of cutting granulation work and improving smoothness and smoothness of a granulation section as much as possible, the temperature control of the granulating die head is preferably controlled to be 250 ℃, and the temperature of cooling water after granulation is controlled to be 55-70 ℃.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The high-thermal-conductivity black master batch is characterized in that: the chemical components by weight percentage are 30-40% of carbon black, 38-45% of linear low density polyethylene, 13-18% of nano graphite, 0.7-1.2% of thiodipropionate, 0.7-1.2% of pentaerythritol ester, 2-5% of vinyl bis stearamide, 2-5% of maleic anhydride grafted polyethylene and the balance of inevitable impurity elements.
2. The high thermal conductivity black master batch according to claim 1, wherein the chemical components comprise, by weight, 35% of carbon black, 42% of linear low density polyethylene, 15% of nano graphite, 1% of thiodipropionate, 1% of pentaerythritol ester, 3% of vinyl bis-stearamide, 2% of maleic anhydride grafted polyethylene, and the balance of inevitable impurity elements.
3. The high thermal conductivity black master batch according to any one of claims 1-2, wherein the DBP oil absorption value of the carbon black is controlled to be 120mg/100g at 100-.
4. A preparation method of a high-thermal-conductivity black master batch comprises the following steps:
S1) Mixing and stirring;
S2) Banburying:
S3) Extruding-granulating;
S4) Dehydrating;
S5) Sieving;
S6) Demagnetizing;
S7) Homogenizing;
S8) Packaging;
in step S1In the specification: sequentially putting carbon black, linear low-density polyethylene, nano graphite, thiodipropionate, pentaerythritol ester, vinyl bis stearamide and maleic anhydride grafted polyethylene into a stirrer, and stirring and mixing to obtain a mixture a;
in step S2In the specification: continuously adding carbon black and linear low-density polyethylene into the mixture a, and placing the mixture into an internal mixer for internal mixing to obtain a mixture b;
in step S3In the specification: the mixture b was fed to a single screw extruder to extrude linear strands, followed by chopping and pelletizing through a pellet die.
5. The method for preparing the high thermal conductivity black master batch according to claim 4, wherein the step S is performed2The internal mixer is a continuous twin-screw internal mixer; in the internal mixing process, the temperature distribution of the internal mixer is that the temperature of a feed inlet section is controlled to be 44-46 ℃, the temperature of an intermediate refining section is controlled to be 94-96 ℃, the temperature of a discharge outlet is controlled to be 249-251 ℃ and the water temperature of a rotor is controlled to be 29-31 ℃.
6. The preparation method of the high thermal conductivity black master batch according to claim 4, wherein the operating speed of the internal mixer is controlled to 400-450 r/Min.
7. The preparation method of the high thermal conductivity black master batch according to claim 4, wherein the temperature of the granulating die head is controlled to be 250 ℃, and the temperature of cooling water after granulating is controlled to be 55-70 ℃.
8. The method for preparing the high thermal conductivity black master batch according to claim 4, wherein the step S is performed2In addition to the carbon black, linear low density polyethylene, which was originally added, an adsorbent was also added to the mixture a.
9. The method for preparing the high thermal conductivity black master batch according to claim 4, wherein the extrusion pressure of the single-screw extruder is 90-120 MPa.
CN202011307229.1A 2020-11-20 2020-11-20 High-thermal-conductivity black master batch and preparation method thereof Pending CN112409680A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108485245A (en) * 2018-03-26 2018-09-04 袁峰 A kind of versatility black agglomerate and preparation method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108485245A (en) * 2018-03-26 2018-09-04 袁峰 A kind of versatility black agglomerate and preparation method thereof

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