CN107722678B - Production method of special carbon black for sleeper insulation gasket - Google Patents

Production method of special carbon black for sleeper insulation gasket Download PDF

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CN107722678B
CN107722678B CN201710935325.2A CN201710935325A CN107722678B CN 107722678 B CN107722678 B CN 107722678B CN 201710935325 A CN201710935325 A CN 201710935325A CN 107722678 B CN107722678 B CN 107722678B
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carbon black
sleeper
inorganic silicon
special
mixing
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CN107722678A (en
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范正平
邓毅
李兵红
刘向上
王家贵
王定友
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Hao Yuan Black Research & Design Institute Of Chemical Industry Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/44—Carbon
    • C09C1/48—Carbon black
    • C09C1/56—Treatment of carbon black ; Purification
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L7/00—Compositions of natural rubber
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/06—Treatment with inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Sealing Material Composition (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Liquid Crystal (AREA)

Abstract

The invention discloses a production method of special carbon black for an insulating gasket of an under-rail sleeper, which is characterized by comprising the following steps of: includes the following steps S1: selecting carbon black having reinforcing properties and surface groups; s2: mixing an inorganic silicon raw material and an activating agent at the temperature of 280-300 ℃ to obtain an inorganic silicon material with active groups on the surface; s3: and (3) mixing the carbon black in the step S1 and the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed stirrer according to the ratio of 1: 0.33-0.4, stirring for 10-40 minutes, heating to 120-150 ℃, carrying out heat treatment for 1-1.5 hours, cooling, and packaging to obtain the special carbon black finished product for the sleeper insulation gasket. The carbon black produced by the method has good physical and mechanical properties, and can improve the material performance, cold resistance and heat resistance of the sleeper pad under the rail; meanwhile, the insulating property is good, and the problem of poor insulating property in the prior art can be effectively solved.

Description

Production method of special carbon black for sleeper insulation gasket
Technical Field
The invention relates to the technical field of under-rail sleeper insulating gaskets, in particular to a production method of special carbon black for the under-rail sleeper insulating gasket.
Background
The insulating spacer of sleeper under the rail is an important part in the track structure, install between rail and concrete sleeper, its main function is to buffer the high-speed vibration and impact that the vehicle produced when passing the rail, protect road bed and sleeper, and carry out the electrical insulation to the signal, in addition the insulating spacer is because exposing in the atmosphere for a long time, therefore the requirement has good natural aging resistance and cold-resistant, heat-resisting property.
The traditional insulation gasket of the sleeper under the rail has poor natural aging resistance, and meanwhile, the conductivity does not meet the relevant standard requirements issued by the department of transportation, so that the adopted raw materials do not have the characteristics of stable structural performance and the like.
The performance of the insulating gasket depends mainly on the raw materials used, so that it is necessary to produce a raw material with high structural performance and satisfactory conductivity.
Disclosure of Invention
The invention provides a production method of special carbon black for an insulating gasket of an under-rail sleeper, which is used for solving the problems in the prior art that: the traditional insulation gasket of the sleeper under the rail has poor natural aging resistance, and meanwhile, the conductivity does not meet the relevant standard requirements issued by the department of transportation, so that the technical problem that the adopted raw materials do not have the characteristics of stable structural performance and the like is caused.
The invention is realized by the following technical scheme: comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups;
s2: mixing an inorganic silicon raw material and an activating agent at the temperature of 280-300 ℃ to obtain an inorganic silicon material with active groups on the surface;
s3: and (3) mixing the carbon black in the step S1 and the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed stirrer according to the ratio of 1: 0.33-0.4, stirring for 10-40 minutes, heating to 120-150 ℃, carrying out heat treatment for 1-1.5 hours, cooling, and packaging to obtain the special carbon black finished product for the sleeper insulation gasket.
In order to better implement the present invention, the carbon black varieties in step S1 are N220 and N330.
In order to better implement the present invention, further, in step S2, the inorganic silicon raw material is mixed with an activating agent at 290 ℃ to obtain an inorganic silicon material having active groups on the surface.
In order to better implement the invention, in step S3, the carbon black in step S1 and the inorganic silicon material with active genes on the surface in step S2 are mixed in a high-speed mixer according to a ratio of 1: 0.33-0.4, and are mixed and stirred for 20 minutes, then the mixture is heated to 120-150 ℃ for heat treatment for 1-1.5 hours, and the mixture is cooled and packaged to obtain the carbon black finished product special for the sleeper insulating gasket.
In order to better implement the invention, in step S3, the carbon black in step S1 and the inorganic silicon material with active genes on the surface in step S2 are mixed in a high-speed mixer according to a ratio of 1: 0.33-0.4, and are mixed and stirred for 20 minutes, then the mixture is heated to 120-150 ℃ for heat treatment for 1.2 hours, and then the mixture is cooled and packaged to obtain the carbon black finished product special for the sleeper insulating gasket.
In order to better implement the invention, in step S3, the carbon black in step S1 and the inorganic silicon material with active genes on the surface in step S2 are mixed in a high-speed mixer according to a ratio of 1: 0.33-0.4, and are mixed and stirred for 20 minutes, then the mixture is heated to 130 ℃ for heat treatment for 1.2 hours, and the mixture is cooled and packaged to obtain the carbon black finished product special for the sleeper insulating spacer.
In order to better implement the invention, in step S3, the carbon black in step S1 and the inorganic silicon material with active genes on the surface in step S2 are mixed in a high-speed mixer according to a ratio of 1:0.35, and are mixed and stirred for 20 minutes, then the mixture is heated to 120-150 ℃ for heat treatment for 1.2 hours, and the mixture is cooled and packaged to obtain the carbon black finished product special for the sleeper insulating spacer.
In order to meet the requirement that the insulation gasket of the sleeper below the rail prepared from the adopted raw materials meets the requirement, the adopted raw materials are carbon black, the variety of the carbon black is N220 and N330, the variety of the carbon black has reinforcing property and surface groups, the structural characteristic of the carbon black is an important characteristic that carbon black particles generate a reinforcing effect on rubber, the carbon black is used for representing the degree of branched chain or grape shape on the surface of the carbon black and can be represented by measuring the absorption value of the carbon black on oil, and the larger the oil absorption value of the carbon black is, the higher the structural property of the carbon black is, a space network channel which is not easy to damage is easily formed.
The carbon black has a high structure, fine carbon black particles, close network chain accumulation, large specific surface area and more particles per unit mass, and is favorable for forming a chain type conductive structure in a polymer, wherein acetylene black is the best among various carbon black varieties. Carbon black particles with a broad particle size distribution impart conductivity to the polymer more than carbon black particles with a narrow distribution, and this phenomenon can be statistically explained. Carbon blacks with broad particle size distributions, a small number of larger diameter particles, require a large number of smaller diameter particles to compensate, and carbon blacks with the same average particle size have a wider distribution with a greater total number of particles than a narrower distribution.
The larger the carbon black loading amount is, the higher the density of the carbon black aggregate particles in a dispersed state is, and the smaller the average distance between the particles is, the higher the probability of mutual contact is, and a conductive path is easily formed.
When the polarity of the blending system composed of the polymer with different polarities and the carbon black is larger, the critical volume fraction of the carbon black is larger, and the polarity of the matrix is large because the surface of the carbon black contains strong polar groups, which can prevent the conductive particles from agglutinating, so that the conductivity is poor, that is, the conductivity of the system is reduced.
Aiming at the requirements of the insulation gasket of the sleeper under the rail, an inorganic silicon material for blocking the conduction of carbon black is embedded in an insulation carbon black material, and the special carbon black for the sleeper under the rail is produced, wherein the carbon black has good insulativity, and simultaneously, the physical and mechanical properties can completely meet the relevant requirements of a transportation department.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the carbon black is used for producing the special sleeper insulating gasket, the preparation process is simple, the operability is particularly strong, and the adopted raw materials are easy to obtain, economic and practical;
the carbon black produced by the method has good physical and mechanical properties, and can improve the material performance, cold resistance and heat resistance of the sleeper pad under the rail; meanwhile, the insulating property is good, and the problem of poor insulating property in the prior art can be effectively solved.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1:
the production method of the special carbon black for the sleeper insulating gasket comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups, preferably the type of the carbon black is N330;
s2: mixing 120kg of inorganic silicon raw material with 9.6kg of activating agent at 280 ℃, and carrying out heat treatment for 1.5-2 h to obtain an inorganic silicon material with active groups on the surface;
s3: and (3) mixing 77kg of the carbon black obtained in the step S1 and 23kg of the inorganic silicon material with the active genes on the surface obtained in the step S2 in a high-speed mixer, stirring at the rotating speed of 1200-1350 rpm for 10 minutes, heating to 120 ℃, carrying out heat treatment for 1 hour, cooling and packaging to obtain the special carbon black finished product 1 for the sleeper insulation gasket.
Example 2:
the production method of the special carbon black for the sleeper insulating gasket comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups, preferably the type of the carbon black is N220;
s2: mixing 120kg of inorganic silicon raw material with 9kg of activating agent at 290 ℃, and carrying out heat treatment for 1.5-2 h to obtain an inorganic silicon material with active groups on the surface;
s3: and (4) mixing 70kg of the carbon black in the step S1 and 20kg of the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed stirrer, stirring at the rotating speed of 1200-1350 rpm for 20 minutes, heating to 130 ℃, carrying out heat treatment for 1.1 hour, cooling and packaging to obtain the special carbon black finished product 2 for the sleeper insulation gasket.
Example 3:
the production method of the special carbon black for the sleeper insulating gasket comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups, preferably the type of the carbon black is N330;
s2: mixing 120kg of inorganic silicon raw material with 12kg of activating agent at 295 ℃, and carrying out heat treatment for 1.5-2 h to obtain an inorganic silicon material with active groups on the surface;
s3: and (3) mixing 75kg of the carbon black in the step S1 and 25kg of the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed stirrer, stirring at the rotating speed of 1200-1350 rpm for 30 minutes, heating to 130 ℃, carrying out heat treatment for 1.2 hours, cooling and packaging to obtain the special carbon black finished product 3 for the sleeper insulation gasket.
Example 4:
the production method of the special carbon black for the sleeper insulating gasket comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups, preferably the type of the carbon black is N220;
s2: mixing 120kg of inorganic silicon raw material with 10kg of activating agent at 295 ℃, and carrying out heat treatment for 1.5-2 h to obtain an inorganic silicon material with active groups on the surface;
s3: and (3) mixing the carbon black 74kg in the step S1 and the inorganic silicon material 23kg with the active genes on the surface in the step S2 in a high-speed stirrer, stirring at the rotating speed of 1200-1350 rpm for 30 minutes, heating to 130 ℃, carrying out heat treatment for 1.3 hours, cooling and packaging to obtain the special carbon black finished product 4 for the sleeper insulation gasket.
Example 5:
the production method of the special carbon black for the sleeper insulating gasket comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups, preferably the type of the carbon black is N330;
s2: mixing 120kg of inorganic silicon raw material with 7.2kg of activating agent at 300 ℃, and carrying out heat treatment for 1.5-2 h to obtain an inorganic silicon material with active groups on the surface;
s3: and (3) mixing 72kg of the carbon black in the step S1 and 28kg of the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed mixer, stirring at the rotating speed of 1200-1350 rpm for 20 minutes, heating to 140 ℃, carrying out heat treatment for 1.4 hours, cooling and packaging to obtain the special carbon black finished product 5 for the sleeper insulation gasket.
Example 6:
the production method of the special carbon black for the sleeper insulating gasket comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups, preferably the type of the carbon black is N220;
s2: mixing 120kg of inorganic silicon raw material with 8kg of activating agent at 285 ℃, and carrying out heat treatment for 1.5-2 h to obtain an inorganic silicon material with active groups on the surface;
s3: and (3) mixing the carbon black 74kg in the step S1 and the inorganic silicon material 27kg with the active genes on the surface in the step S2 in a high-speed stirrer, stirring at the rotating speed of 1200-1350 rpm for 40 minutes, heating to 150 ℃, carrying out heat treatment for 1.5 hours, cooling and packaging to obtain the carbon black finished product 6 special for the sleeper insulation gasket.
Comparative example 1:
the production method of the special carbon black for the sleeper insulating gasket comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups, preferably the type of the carbon black is N330;
s2: mixing 120kg of inorganic silicon raw material with 10kg of activating agent at 250 ℃, and carrying out heat treatment for 1.5-2 h to obtain an inorganic silicon material with active groups on the surface;
s3: and (4) mixing 70kg of the carbon black in the step S1 and 30kg of the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed stirrer, stirring at the rotating speed of 1200-1350 rpm for 5 minutes, heating to 90 ℃, carrying out heat treatment for 1 hour, cooling and packaging to obtain the special carbon black finished product 7 for the sleeper insulation gasket.
Comparative example 2:
the production method of the special carbon black for the sleeper insulating gasket comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups, preferably the type of the carbon black is N220;
s2: and (4) mixing 30kg of the carbon black in the step S1 in a high-speed mixer at the stirring speed of 1200-1350 rpm for 25 minutes, heating to 130 ℃ for heat treatment for 1.5 hours, cooling and packaging to obtain the carbon black finished product 8 special for the sleeper insulation spacer.
Comparative example 3:
the production method of the special carbon black for the sleeper insulating gasket comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups, preferably the type of the carbon black is N220;
s2: 120kg of inorganic silicon raw material;
s3: and (3) mixing 30kg of the carbon black in the step S1 and 50kg of the inorganic silicon material in the step S2 in a high-speed mixer, stirring at the rotating speed of 1200-1350 rpm for 20 minutes, heating to 130 ℃, carrying out heat treatment for 1 hour, cooling and packaging to obtain the special carbon black finished product 9 for the sleeper insulation gasket.
As described above, the experimental examples and comparative examples used chemical analysis and physical analysis, and the results shown in the following tables were obtained;
table 1: results of chemical analysis of Experimental examples 1 to 6 and comparative examples 1 to 3
Figure BDA0001429662840000071
Figure BDA0001429662840000081
Table 2 shows the physical property test formulas
Material phr
NR 70
IIR 30
ZnO 5
Stearic acid 2
Paraffin wax 0.4
Sulfur 1.7
Accelerator 3.1
Coupling agent 2
Insulating carbon black TC-380 100
Total up to 214.2
Table 3 shows the national people's republic of China Ministry of railways industry Standard TB/T2626-1995
Figure BDA0001429662840000082
Table 4 shows the results of physical property tests in Experimental example 1
Figure BDA0001429662840000083
Figure BDA0001429662840000091
Table 5 shows the results of physical property testing in Experimental example 2
Figure BDA0001429662840000092
Table 6 shows the results of physical property tests in Experimental example 3
Figure BDA0001429662840000093
Table 7 shows the results of physical property tests in Experimental example 4
Figure BDA0001429662840000094
Figure BDA0001429662840000101
Table 8 shows the results of physical property testing in Experimental example 5
Figure BDA0001429662840000102
Table 9 shows the results of physical property testing in Experimental example 6
Figure BDA0001429662840000103
Table 10 shows the results of the physical property test of comparative example 1
Figure BDA0001429662840000104
Figure BDA0001429662840000111
Table 11 shows the results of the physical property test of comparative example 1
Figure BDA0001429662840000112
Table 12 shows the results of physical property testing of comparative example 1
Figure BDA0001429662840000113
After the comparison of the tables, the products produced by the method can meet the industry standard of the Ministry of railways of the people's republic of China, and in the comparative examples 1-3, particularly in the comparative example 2, no inorganic silicon is added, so that the product performance is far from insufficient. In comparative example 3, although inorganic silicon was added, the performance of the product could not meet the standard because of the addition of the activator.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (6)

1. A production method of special carbon black for an insulating gasket of an under-rail sleeper is characterized by comprising the following steps: comprises the following steps
S1: selecting carbon black having reinforcing properties and surface groups;
s2: mixing an inorganic silicon raw material and an activating agent at the temperature of 280-300 ℃ to obtain an inorganic silicon material with active groups on the surface;
s3: mixing the carbon black in the step S1 and the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed stirrer according to the proportion of 1: 0.33-0.4, stirring for 10-40 minutes, heating to 120-150 ℃, carrying out heat treatment for 1-1.5 hours, cooling, and packaging to obtain a carbon black finished product special for the sleeper insulation gasket;
the carbon black varieties in the step S1 are N220 and N330.
2. The method for producing carbon black special for the insulation gasket of the sleeper under rail according to claim 1, characterized in that: in the step S2, the inorganic silicon raw material and the activator are mixed at 290 ℃ to obtain an inorganic silicon material with active groups on the surface.
3. The method for producing carbon black special for the insulation gasket of the sleeper under rail according to claim 1, characterized in that: and in the step S3, mixing the carbon black in the step S1 and the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed stirrer according to the ratio of 1: 0.33-0.4, stirring for 20 minutes, heating to 120-150 ℃, carrying out heat treatment for 1-1.5 hours, cooling, and packaging to obtain the special carbon black finished product for the sleeper insulation gasket.
4. The method for producing carbon black special for the insulation gasket of the sleeper under rail according to claim 1, characterized in that: and in the step S3, mixing the carbon black in the step S1 and the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed stirrer according to the ratio of 1: 0.33-0.4, stirring for 20 minutes, heating to 120-150 ℃, carrying out heat treatment for 1.2 hours, cooling, and packaging to obtain the carbon black finished product special for the sleeper insulation gasket.
5. The method for producing carbon black special for the sleeper insulation spacer according to any one of claims 1 to 4, characterized in that: and in the step S3, mixing the carbon black in the step S1 and the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed stirrer according to the ratio of 1: 0.33-0.4, stirring for 20 minutes, heating to 130 ℃, carrying out heat treatment for 1.2 hours, cooling, and packaging to obtain the carbon black finished product special for the insulation pad of the sleeper.
6. The method for producing carbon black special for the sleeper insulation spacer according to any one of claims 1 to 4, characterized in that: and in the step S3, mixing the carbon black in the step S1 and the inorganic silicon material with the active genes on the surface in the step S2 in a high-speed stirrer according to the proportion of 1:0.35, stirring for 20 minutes, heating to 120-150 ℃, carrying out heat treatment for 1.2 hours, cooling, and packaging to obtain the special carbon black finished product for the insulation pad of the sleeper.
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CN2623689Y (en) * 2003-04-30 2004-07-07 南京曙光化工集团有限公司 Compound particle containing sulfur-silicane coupling agent and carbon black, white carbon black
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