CN111040316A - Dry self-lubricating rubber material and preparation method thereof - Google Patents
Dry self-lubricating rubber material and preparation method thereof Download PDFInfo
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- CN111040316A CN111040316A CN201911374989.1A CN201911374989A CN111040316A CN 111040316 A CN111040316 A CN 111040316A CN 201911374989 A CN201911374989 A CN 201911374989A CN 111040316 A CN111040316 A CN 111040316A
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- rubber material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- 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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/068—Ultra high molecular weight polyethylene
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
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Abstract
The invention discloses a dry self-lubricating rubber material and a preparation method thereof, wherein the dry self-lubricating rubber material comprises the following components in parts by weight: 70-120 parts of rubber; 1-5 parts of a protective agent; 5-30 parts of a dry lubricant; 20-30 parts of a filler; 10-30 parts of a plasticizer; 1-5 parts of an accelerator; 2-5 parts of a vulcanizing agent; the dry lubricant is ultra-high molecular weight polyethylene with number average molecular weight of 1.8-2.2 × 106g/mol, average grain diameter of 25-35 μm, and the ratio of the added mass parts of the filler and the plasticizer is 1-3: 1. According to the dry self-lubricating rubber material, the specific dry lubricant is added to the formula components, so that a product made of the rubber material is easy to demould, the demoulding effect can be continuously kept at a high temperature of 160-180 ℃, and the rubber material has excellent physical properties by properly controlling the adding proportion of the filler and the plasticizer.
Description
Technical Field
The invention relates to a dry self-lubricating rubber material and a preparation method thereof.
Background
The rubber is generally vulcanized and crosslinked by adding a vulcanizing agent and a vulcanization accelerator or a single vulcanizing agent. Research shows that when the structure of a product made of a common rubber material is complex, the product is easy to scratch and tear due to demolding, so that the product is scrapped, and in addition, the rubber material product made of the conventional oil lubricant has poor demolding effect at high temperature, so that the rejection rate of the product is greatly increased.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the dry self-lubricating rubber material and the preparation method thereof, so that a product made of the rubber material is easy to demould, and the demoulding effect can be continuously maintained at a high temperature of 160-180 ℃.
The invention aims to provide a dry self-lubricating rubber material which comprises the following components in parts by weight:
the dry lubricant is ultra-high molecular weight polyethylene, and the number average molecular weight of the ultra-high molecular weight polyethylene is 1.8-2.2 multiplied by 106g/mol, average grain diameter of 25-35 μm, and the ratio of the added parts by weight of the filler and the plasticizer is 1-3: 1.
Specifically, the rubber is one of ethylene propylene diene monomer, polyurethane rubber, nitrile rubber and chloroprene rubber.
Preferably, the rubber is ethylene propylene diene monomer, the Mohs viscosity ML (125 ℃) of the ethylene propylene diene monomer is 28, the mass percent of ethylene is 52%, and the rubber unsaturation ENB is 8.1.
Specifically, the protective agent is a phenolic antioxidant, and the phenolic antioxidant is one selected from KAWAGUCHI CHEMICALW400, KAWAGUCHI CHEMICAL W300, antioxidant BHT, antioxidant SP, antioxidant DBH and antioxidant DHA.
Specifically, the filler is carbon black, and the carbon black is two selected from N550 carbon black, N774 carbon black and N330 carbon black.
Specifically, the plasticizer is one selected from chlorinated paraffin, DOS, TP95, paraffin oil, and PLASTIEN 2812.
Specifically, the accelerators include thiazole accelerators and dithiocarbamate accelerators.
Preferably, the thiazole accelerator is one selected from mercaptothiazole MBT-80, benzothiazole sulfonamide accelerators TBBS-80 and MBTS-75HD, and the dithiocarbamate accelerator is one selected from zinc dibutyl dithiocarbamate BZ, zinc diethyl dithiocarbamate ZDC and ACCEL TL-PT.
Specifically, the vulcanizing agent is one selected from S-80, sulfur chloride S2CL2 and dicumyl peroxide (DCP).
The invention also provides a preparation method of the dry self-lubricating rubber material, which comprises the following steps:
(1) mixing weighed rubber, protective agent, dry lubricant, filler, plasticizer, accelerator and vulcanizing agent in an internal mixer to obtain a mixed material;
(2) mixing the materials at 170 +/-10 ℃ and 70kgf/cm2±20kgf/cm2And then, carrying out vulcanization reaction for 300-500S to obtain the dry self-lubricating rubber material.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the dry self-lubricating rubber material, the specific dry lubricant is added to the formula components, so that a product made of the rubber material is easy to demould, the demoulding effect can be continuously kept at a high temperature of 160-180 ℃, and the rubber material has excellent physical properties by properly controlling the adding proportion of the filler and the plasticizer, is simple in preparation method and low in cost, and is beneficial to industrial application.
Detailed Description
The invention provides a dry self-lubricating rubber material which comprises the following components in parts by weight:
the dry lubricant is ultra-high molecular weight polyethyleneThe number average molecular weight of the alkene is 1.8-2.2 × 106g/mol, average grain diameter of 25-35 μm, and the ratio of the added parts by weight of the filler and the plasticizer is 1-3: 1. The ultra-high molecular weight polyethylene of the present invention is purchased from mitsui japan under the designation XM 220.
The rubber is one selected from ethylene propylene diene monomer, polyurethane rubber, nitrile rubber and chloroprene rubber; the formulations of the present invention can be used in any of the four rubber systems described above.
The rubber of the embodiment of the invention is ethylene propylene diene monomer, the Mohs viscosity ML (125 ℃) of the ethylene propylene diene monomer is 28, the mass percent of ethylene is 52%, and the rubber unsaturation ENB is 8.1. The ethylene propylene diene rubber of the present invention is available from JSR EP33, japan.
The protective agent is phenolic antioxidant selected from KAWAGUCHI CHEMICAL W400, KAWAGUCHICHEMICAL W300, antioxidant BHT, antioxidant SP, antioxidant DBH and antioxidant DHA.
The filler is carbon black, and the carbon black is two selected from N550 carbon black, N774 carbon black and N330 carbon black.
The plasticizer is one selected from chlorinated paraffin, DOS, TP95, paraffin oil and PLASTIEN 2812.
Accelerators include thiazole accelerators and dithiocarbamate accelerators.
The thiazole accelerant is one selected from mercaptothiazole MBT-80, benzothiazole sulfonamide accelerant TBBS-80 and MBTS-75HD, and the dithiocarbamate accelerant is one selected from zinc dibutyl dithiocarbamate BZ, zinc diethyl dithiocarbamate ZDC and ACCEL TL-PT.
The vulcanizing agent is one selected from S-80, sulfur chloride S2CL2 and dicumyl peroxide (DCP).
The invention also provides a preparation method of the dry self-lubricating rubber material, which comprises the following steps:
(1) mixing weighed rubber, protective agent, dry lubricant, filler, plasticizer, accelerator and vulcanizing agent in an internal mixer to obtain a mixed material;
(2) mixing the materials at 170 ℃ +/-1 DEG C0 ℃ under a pressure of 70kgf/cm2±20kgf/cm2And then, carrying out vulcanization reaction for 300-500S to obtain the dry self-lubricating rubber material.
The following provides a detailed description of preferred embodiments of the invention.
Embodiment 1 provides a dry self-lubricating rubber material, which comprises the following components in parts by weight:
the ratio of the added mass parts of the filler to the plasticizer at this time was 1: 1.
A preparation method of the dry self-lubricating rubber material comprises the following steps:
(1) mixing weighed rubber, protective agent, dry lubricant, filler, plasticizer, accelerator and vulcanizing agent on an open mill to obtain a mixed material;
(2) mixing the materials at 170 +/-10 deg.C under 70kgf/cm2±20kgf/cm2And then, carrying out vulcanization reaction for 300-500S to obtain the dry self-lubricating rubber material.
Embodiment 2 provides a dry self-lubricating rubber material and a preparation method thereof, wherein the dry self-lubricating rubber material comprises the following components in parts by weight:
embodiment 3 provides a dry self-lubricating rubber material and a preparation method thereof, wherein the dry self-lubricating rubber material comprises the following components in parts by weight:
example 4 provides a dry self-lubricating rubber material and a method of making the same, which is substantially the same as in example 1 except that: the dry lubricant is added in 5 parts by mass.
Example 5 provides a dry self-lubricating rubber material and a method of making the same, which is substantially the same as in example 1 except that: the adding mass portion of the dry lubricant is 30 portions.
Example 6 provides a dry self-lubricating rubber material and a method of making the same, which is substantially the same as in example 1 except that: the ratio of the added parts by mass of the filler to the added parts by mass of the plasticizer is 2:1, wherein the added parts by mass of the filler is 20 parts, and the added parts by mass of the plasticizer is 10 parts.
Example 7 provides a dry self-lubricating rubber material and a method of making the same, which is substantially the same as in example 1, except that: the ratio of the added parts by mass of the filler to the added parts by mass of the plasticizer is 3:1, wherein the added parts by mass of the filler is 30 parts, and the added parts by mass of the plasticizer is 10 parts.
Comparative example 1 provides a dry self-lubricating rubber material and a method for preparing the same, which is substantially the same as in example 1 except that: no dry lubricant ultra high molecular weight polyethylene is added.
Comparative example 2 provides a dry self-lubricating rubber material and a method for producing the same, which is substantially the same as in example 1 except that: the dry lubricant, ultra-high molecular weight polyethylene, is not added, and the oil lubricant, paraffin is selected.
Comparative example 3 provides a dry self-lubricating rubber material and a method for preparing the same, which is substantially the same as in example 1 except that: the adding mass portion of the dry lubricant is 40 portions.
Comparative example 4 provides a dry self-lubricating rubber material and a method for producing the same, which is substantially the same as in example 1 except that: the ratio of the added parts of the filler to the added parts of the plasticizer is 0.8:1, wherein the added parts of the filler are 20 parts, and the added parts of the plasticizer are 25 parts.
Comparative example 5 provides a dry self-lubricating rubber material and a method for producing the same, which is substantially the same as in example 1 except that: the ratio of the added parts of the filler to the added parts of the plasticizer is 3.5:1, wherein the added parts of the filler are 35 parts, and the added parts of the plasticizer are 10 parts.
Table 1: physical property data of the dry self-lubricating rubber materials prepared in examples 1 to 7 and comparative examples 1 to 5:
comparing examples 1 and 4 to 5, and comparative examples 1 and 3, it can be seen that within a certain range, the change in the fraction of dry lubricant causes the change in the material viscosity, the smaller the fraction of dry lubricant, the higher the value of the viscosity, the higher the fraction of dry lubricant, the higher the value of the viscosity; however, too little dry lubricant does not achieve the material lubrication effect, and too high dry lubricant causes the material to be unevenly dispersed, and the material properties such as tensile elongation are reduced.
In comparative example 2, the oily lubricant paraffin is selected, and when the oily lubricant paraffin is excessively added, the phenomenon of white spitting is easy to occur, and even if the oily lubricant is reasonably added, the phenomena of pulling, oil cracking and the like are easy to occur when the product is subjected to mold stripping at the temperature of 160-. The invention selects the dry lubricant, and the product can continuously keep the demoulding effect when being demoulded at the temperature of 160 ℃ and 180 ℃.
Comparing examples 1, 6 to 7 and comparative examples 4 to 5, it is understood that the change in the ratio of the plasticizer and the filler in a certain range causes the change in the viscosity property of the material, and when the ratio is too high, the viscosity becomes large, and when the ratio is too low, the physical properties are deteriorated.
According to the dry self-lubricating rubber material, the specific dry lubricant is added to the formula components, so that a product made of the rubber material is easy to demold, the demolding effect can be continuously maintained at the high temperature of 160-180 ℃, and meanwhile, the rubber material has excellent physical properties by properly controlling the addition ratio of the filler to the plasticizer, and the dry self-lubricating rubber material is simple in preparation method, low in cost and beneficial to industrial application.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The dry self-lubricating rubber material is characterized by comprising the following components in parts by weight:
the dry lubricant is ultra-high molecular weight polyethylene, and the number average molecular weight of the ultra-high molecular weight polyethylene is 1.8-2.2 multiplied by 106g/mol, average grain diameter of 25-35 μm, and the ratio of the added parts by weight of the filler and the plasticizer is 1-3: 1.
2. The dry self-lubricating rubber material according to claim 1, characterized in that: the rubber is one of ethylene propylene diene monomer, polyurethane rubber, nitrile rubber and chloroprene rubber.
3. The dry self-lubricating rubber material according to claim 2, characterized in that: the rubber is ethylene propylene diene monomer, the Mohs viscosity ML (125 ℃) of the ethylene propylene diene monomer is 28, the mass percent of ethylene is 52%, and the rubber unsaturation ENB is 8.1.
4. The dry self-lubricating rubber material according to claim 1, characterized in that: the protective agent is a phenolic antioxidant, and the phenolic antioxidant is one selected from KAWAGUCHI CHEMICAL W400, KAWAGUCHI CHEMICAL W300, antioxidant BHT, antioxidant SP, antioxidant DBH and antioxidant DHA.
5. The dry self-lubricating rubber material according to claim 1, characterized in that: the filler is carbon black, and the carbon black is two selected from N550 carbon black, N774 carbon black and N330 carbon black.
6. The dry self-lubricating rubber material according to claim 1, characterized in that: the plasticizer is one selected from chlorinated paraffin, DOS, TP95, paraffin oil and PLASTIEN 2812.
7. The dry self-lubricating rubber material according to claim 1, characterized in that: the accelerators include thiazole accelerators and dithiocarbamate accelerators.
8. The dry self-lubricating rubber material according to claim 7, wherein: the thiazole accelerator is one selected from mercaptothiazole MBT-80, benzothiazole sulfonamide accelerators TBBS-80 and MBTS-75HD, and the dithiocarbamate accelerator is one selected from zinc dibutyl dithiocarbamate BZ, zinc diethyl dithiocarbamate ZDC and ACCEL TL-PT.
9. The dry self-lubricating rubber material according to claim 1, characterized in that: the vulcanizing agent is one selected from S-80, sulfur chloride S2CL2 and dicumyl peroxide (DCP).
10. A process for the preparation of a dry self-lubricating rubber material according to any one of claims 1 to 9, comprising the steps of:
(1) mixing weighed rubber, protective agent, dry lubricant, filler, plasticizer, accelerator and vulcanizing agent in an internal mixer to obtain a mixed material;
(2) mixing the materials at 170 +/-10 ℃ and 70kgf/cm2±20kgf/cm2And then, carrying out vulcanization reaction for 300-500S to obtain the dry self-lubricating rubber material.
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| CN201911374989.1A CN111040316A (en) | 2019-12-27 | 2019-12-27 | Dry self-lubricating rubber material and preparation method thereof |
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| CN201911374989.1A CN111040316A (en) | 2019-12-27 | 2019-12-27 | Dry self-lubricating rubber material and preparation method thereof |
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Citations (6)
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|---|---|---|---|---|
| CN101619147A (en) * | 2009-07-25 | 2010-01-06 | 四川明星电缆股份有限公司 | Oil resistant butadiene-acrylonitrile rubber and preparation method thereof |
| CN101709120A (en) * | 2009-10-22 | 2010-05-19 | 北京万源瀚德汽车密封系统有限公司 | Rubber additive and ethylene propylene diene monomer containing same |
| CN104231352A (en) * | 2014-10-23 | 2014-12-24 | 武汉理工大学 | Rubber and thermoplastic material blend rubber material and preparation method thereof |
| CN106674644A (en) * | 2016-11-24 | 2017-05-17 | 中国科学院长春应用化学研究所 | Super wear-resistant water-lubricated bearing composite material and preparation method thereof |
| CN108976614A (en) * | 2018-07-02 | 2018-12-11 | 青岛三祥科技股份有限公司 | EPT rubber composition and preparation method thereof |
| CN110240758A (en) * | 2019-06-18 | 2019-09-17 | 宁国市正道橡塑零部件有限公司 | A kind of self-lubricating abrasion-resistant rubber material and preparation method thereof |
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2019
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| CN101619147A (en) * | 2009-07-25 | 2010-01-06 | 四川明星电缆股份有限公司 | Oil resistant butadiene-acrylonitrile rubber and preparation method thereof |
| CN101709120A (en) * | 2009-10-22 | 2010-05-19 | 北京万源瀚德汽车密封系统有限公司 | Rubber additive and ethylene propylene diene monomer containing same |
| CN104231352A (en) * | 2014-10-23 | 2014-12-24 | 武汉理工大学 | Rubber and thermoplastic material blend rubber material and preparation method thereof |
| CN106674644A (en) * | 2016-11-24 | 2017-05-17 | 中国科学院长春应用化学研究所 | Super wear-resistant water-lubricated bearing composite material and preparation method thereof |
| CN108976614A (en) * | 2018-07-02 | 2018-12-11 | 青岛三祥科技股份有限公司 | EPT rubber composition and preparation method thereof |
| CN110240758A (en) * | 2019-06-18 | 2019-09-17 | 宁国市正道橡塑零部件有限公司 | A kind of self-lubricating abrasion-resistant rubber material and preparation method thereof |
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Application publication date: 20200421 |