CN116102825B - Halogen-free flame-retardant rubber conveyer belt and production method thereof - Google Patents
Halogen-free flame-retardant rubber conveyer belt and production method thereof Download PDFInfo
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- CN116102825B CN116102825B CN202310394915.4A CN202310394915A CN116102825B CN 116102825 B CN116102825 B CN 116102825B CN 202310394915 A CN202310394915 A CN 202310394915A CN 116102825 B CN116102825 B CN 116102825B
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
Abstract
The invention relates to the technical field of rubber products, and provides a halogen-free flame-retardant rubber conveyer belt and a production method thereof, wherein the halogen-free flame-retardant rubber conveyer belt comprises a covering rubber and a framework layer, and the raw materials of the covering rubber comprise the following components in parts by weight: 30-40 parts of hydrogenated nitrile rubber, 10-20 parts of methyl vinyl phenyl silicone rubber, 50-65 parts of ethylene propylene diene monomer rubber, 10-20 parts of polyethylene glycol, 20-40 parts of filler, 50-80 parts of microencapsulated aluminum hydroxide, 3-5 parts of cross-linking agent, 20-25 parts of adhesive and 10-15 parts of anti-aging agent; the weight parts of the hydrogenated nitrile rubber, the methyl vinyl phenyl silicone rubber and the ethylene propylene diene monomer rubber meet the following standards: hydrogenated nitrile rubber and methyl vinyl phenyl silicone rubber are less than ethylene propylene diene monomer rubber. Through the technical scheme, the problem of poor cohesiveness and wear resistance of the ethylene propylene diene monomer rubber conveying belt is solved.
Description
Technical Field
The invention relates to the technical field of rubber products, in particular to a halogen-free flame-retardant rubber conveyer belt and a production method thereof.
Background
The rubber conveyer belt is a rubber product which is more traditional, has wide application, is applied to transportation operations in various fields such as coal, mine, chemical industry and the like, and has more strict performance requirements on the rubber product due to the universality of the application field. The rubber conveyor belt is required to have excellent properties in terms of high temperature resistance, oil resistance, abrasion resistance and flame retardancy.
The research of the rubber conveyer belt in China starts from natural rubber, and with the development of technology, the conveyer belt is produced by ethylene propylene diene monomer rubber, chloroprene rubber and the like gradually. Compared with other rubber products, the neoprene has better flame retardant property, but the neoprene does not accord with the concept of green environmental protection because of containing halogen. In addition to using halogen-containing rubber to produce the belt, a flame retardant aid may optionally be added to improve the flame retardancy of the belt. Ethylene propylene diene monomer rubber has good high temperature resistance, excellent heat and oxidation resistance and low temperature resistance, but poor cohesiveness and wear resistance, and can reduce the service life of a rubber conveyer belt.
Disclosure of Invention
The invention provides a halogen-free flame-retardant rubber conveyer belt and a production method thereof, which solve the problem of poor cohesiveness and wear resistance of an ethylene propylene diene monomer rubber conveyer belt.
The technical scheme of the invention is as follows:
the halogen-free flame retardant rubber conveyer belt comprises a covering rubber and a framework layer, wherein the raw materials of the covering rubber comprise the following components in parts by weight: 30-40 parts of hydrogenated nitrile rubber, 10-20 parts of methyl vinyl phenyl silicone rubber, 50-65 parts of ethylene propylene diene monomer rubber, 10-20 parts of polyethylene glycol, 20-40 parts of filler, 50-80 parts of microencapsulated aluminum hydroxide, 3-5 parts of cross-linking agent, 20-25 parts of adhesive and 10-15 parts of anti-aging agent;
the weight parts of the hydrogenated nitrile rubber, the methyl vinyl phenyl silicone rubber and the ethylene propylene diene monomer rubber meet the following standards:
hydrogenated nitrile rubber and methyl vinyl phenyl silicone rubber are less than ethylene propylene diene monomer rubber.
As a further technical scheme, the microencapsulated aluminum hydroxide is prepared by the following steps:
s1, adding aluminum hydroxide into a solvent to uniformly disperse;
s2, adding silica sol and stirring;
s3, continuously adding a silane coupling agent and stirring;
s4, adding methacrylic acid-2-hydroxyethyl ester phosphate, stirring, filtering and drying.
The microencapsulated aluminum hydroxide obtained by the preparation method improves the wear resistance and the cohesiveness of the rubber conveyer belt and achieves unexpected technical effects.
As a further technical scheme, the silane coupling agent comprises one or more of vinyl triethoxysilane, vinyl trimethoxysilane and gamma-methacryloxy trimethoxysilane.
As a further technical scheme, the silica sol is silica sol with the silica content of 25% -29% and the pH value of 9.0-10.5.
As a further technical scheme, the granularity of the aluminum hydroxide is 1000-2000 meshes.
As a further technical scheme, the solvent comprises one of methanol and ethanol.
As a further technical scheme, the mass ratio of the aluminum hydroxide to the silica sol to the silane coupling agent to the 2-hydroxyethyl methacrylate phosphate is 10:3:1:2.
As a further technical scheme, the cross-linking agent comprises one of dicumyl peroxide and bis-2, 4-dichlorobenzoyl peroxide.
In the invention, the crosslinking agent is added to promote the crosslinking reaction of the matrix rubber, so that chemical bonds are generated between linear molecules. The linear molecules are interconnected together to form a net structure, so that the strength and elasticity of the rubber can be improved.
As a further technical scheme, the adhesive is a maleic anhydride adhesive.
The invention adopts the existing maleic anhydride adhesive and the matching action of polyethylene glycol and other components, so that better adhesion between the covering glue and the framework layer can be realized, and the adhesive strength is higher.
As a further technical scheme, the framework layer is made of aramid canvas.
As a further technical scheme, the filler comprises one of carbon black and white carbon black.
The invention also provides a production method of the halogen-free flame-retardant rubber conveyer belt, wherein the raw materials of the covering rubber are uniformly mixed to obtain the covering rubber, the covering rubber is attached to the framework layer, and the halogen-free flame-retardant rubber conveyer belt is obtained after calendaring and vulcanizing by a vulcanizing press.
The working principle and the beneficial effects of the invention are as follows:
according to the invention, the wear resistance and the cohesiveness of the ethylene propylene diene monomer rubber are improved through the synergistic compatibility and the controlled dosage of the ethylene propylene diene monomer rubber, the hydrogenated nitrile rubber and the methyl vinyl phenyl silicone rubber. The use of halogen-containing flame retardant is avoided by adding microencapsulated aluminum hydroxide, and the microencapsulated aluminum hydroxide can also ensure the influence of the addition of a larger amount of inorganic flame retardant on the mechanical properties of the rubber matrix. Polyethylene glycol is also added in the invention, so that the cohesiveness of the covering glue is improved to a certain extent. The prepared rubber conveyer belt has excellent performances and meets the requirements of GB/T20021-2017 canvas core heat-resistant conveyer belt.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the examples of the present invention, without specific description, microencapsulated aluminum hydroxide was prepared as follows:
s1, adding 100 parts of aluminum hydroxide into 400 parts of methanol to uniformly disperse;
s2, adding 30 parts of silica sol and stirring for 40min;
s3, continuously adding 10 parts of vinyl trimethoxy silane and stirring for 45min;
s4, adding 20 parts of methacrylic acid-2-hydroxyethyl phosphate, stirring for 60min, filtering and drying to obtain the microencapsulated aluminum hydroxide.
Wherein the silica sol is RM reinforced silica sol (Hebei Runmu casting material Co., ltd.), and the granularity of aluminum hydroxide is 1250 mesh;
in the embodiment of the invention, the methyl vinyl phenyl silicone rubber is methyl vinyl phenyl silicone rubber IOTA120 (Anhui Ai Yaoda silicone oil Co., ltd.);
the hydrogenated nitrile rubber is hydrogenated nitrile rubber HNBR70 (Beijing Jin Taixin electronic technology Co., ltd.);
the polyethylene glycol is polyethylene glycol 2000;
the carbon black is carbon black N330.
Example 1
A halogen-free flame retardant rubber conveyer belt comprises a covering rubber and a framework layer;
wherein the framework layer is made of aramid canvas;
wherein the covering collagen comprises the following components in parts by weight: 30 parts of hydrogenated nitrile rubber, 10 parts of methyl vinyl phenyl silicone rubber, 50 parts of ethylene propylene diene monomer rubber, 10 parts of polyethylene glycol, 20 parts of carbon black, 50 parts of microencapsulated aluminum hydroxide, 3 parts of dicumyl peroxide, 20 parts of maleic anhydride polybutadiene and 10 parts of microcrystalline wax;
and (3) uniformly mixing the covering rubber raw materials in an open mill to obtain the covering rubber, directly attaching the covering rubber to the framework layer, carrying out calendaring molding, and then vulcanizing for 30min at 160 ℃ on a flat vulcanizing machine to obtain the high-temperature-resistant rubber conveyer belt.
Example 2
A halogen-free flame retardant rubber conveyer belt comprises a covering rubber and a framework layer;
wherein the framework layer is made of aramid canvas;
wherein the covering collagen comprises the following components in parts by weight: 40 parts of hydrogenated nitrile rubber, 20 parts of methyl vinyl phenyl silicone rubber, 65 parts of ethylene propylene diene monomer rubber, 20 parts of polyethylene glycol, 40 parts of carbon black, 80 parts of microencapsulated aluminum hydroxide, 5 parts of dicumyl peroxide, 25 parts of maleic anhydride polybutadiene and 15 parts of an anti-aging agent RD;
and (3) uniformly mixing the covering rubber raw materials in an open mill to obtain the covering rubber, directly attaching the covering rubber to the framework layer, carrying out calendaring molding, and then vulcanizing at 170 ℃ for 40min on a flat vulcanizing machine to obtain the high-temperature-resistant rubber conveyer belt.
Example 3
A halogen-free flame retardant rubber conveyer belt comprises a covering rubber and a framework layer;
wherein the framework layer is made of aramid canvas;
wherein the covering collagen comprises the following components in parts by weight: 35 parts of hydrogenated nitrile rubber, 15 parts of methyl vinyl phenyl silicone rubber, 55 parts of ethylene propylene diene monomer, 15 parts of polyethylene glycol, 30 parts of carbon black, 60 parts of microencapsulated aluminum hydroxide, 4 parts of dicumyl peroxide, 24 parts of maleic anhydride polybutadiene and 14 parts of an anti-aging agent RD;
and (3) uniformly mixing the covering rubber raw materials in an open mill to obtain the covering rubber, directly attaching the covering rubber to the framework layer, carrying out calendaring molding, and then vulcanizing for 30min at 170 ℃ on a flat vulcanizing machine to obtain the high-temperature-resistant rubber conveyer belt.
Example 4
The halogen-free flame retardant rubber conveyer belt is basically the same as the raw material of the example 3, except that the microencapsulated aluminum hydroxide adopts the following preparation method:
s1, adding 100 parts of aluminum hydroxide into 400 parts of methanol to uniformly disperse;
s2, adding 30 parts of silica sol and stirring for 40min;
and S3, continuously adding 10 parts of vinyl trimethoxy silane, stirring for 45min, filtering and drying to obtain the microencapsulated aluminum hydroxide.
Comparative example 1
A halogen-free flame retardant rubber conveyer belt was prepared in the same manner as in example 4 except that polyethylene glycol was not added as in example 4.
Comparative example 2
A halogen-free flame retardant rubber conveyer belt was prepared in the same manner as in example 3 except that polyethylene glycol was not added as in example 3.
Comparative example 3
A halogen-free flame retardant rubber conveyer belt comprises a covering rubber and a framework layer;
wherein the framework layer is made of aramid canvas;
wherein the covering collagen comprises the following components in parts by weight: 35 parts of hydrogenated nitrile rubber, 20 parts of methyl vinyl phenyl silicone rubber, 50 parts of ethylene propylene diene monomer rubber, 15 parts of polyethylene glycol, 30 parts of carbon black, 60 parts of microencapsulated aluminum hydroxide, 4 parts of dicumyl peroxide, 24 parts of maleic anhydride polybutadiene and 14 parts of an anti-aging agent RD;
and (3) uniformly mixing the covering rubber raw materials in an open mill to obtain the covering rubber, directly attaching the covering rubber to the framework layer, carrying out calendaring molding, and then vulcanizing for 30min at 170 ℃ on a flat vulcanizing machine to obtain the high-temperature-resistant rubber conveyer belt.
The abrasion resistance of the covering rubber was tested according to GB/T9867-2008 determination of abrasion resistance of vulcanized rubber or thermoplastic rubber (Rotary roller abrasion machine method);
testing the adhesive strength of the covering glue and the framework layer of the conveyer belt according to GB/T20021-2017 canvas core heat-resistant conveyer belt;
the flame retardance of the covering rubber was tested according to GB/T10707-2008 determination of rubber Combustion Performance.
Table 1 performance testing of examples and comparative examples
The rubber conveyer belt obtained by the embodiment of the invention has excellent wear resistance and high flame retardance, and realizes high-strength adhesion of the covering rubber and the framework layer through simple process steps, and the volume abrasion loss is lower than 70mm 3 The bonding strength of the covering glue and the framework layer is higher than 8.3N/mm, the oxygen index is higher than 40.2, and other indexes meet the requirements of GB/T20021-2017 canvas core heat-resistant conveyor belt.
The invention improves the cohesiveness and wear resistance of the ethylene propylene diene monomer rubber, and on one hand, the invention is realized by the synergistic compatibility and the controlled dosage of the ethylene propylene diene monomer rubber, the hydrogenated nitrile rubber and the methyl vinyl phenyl silicone rubber. The increased addition of hydrogenated nitrile rubber and methyl vinyl phenyl silicone rubber in comparative example 3 compared to example 3 resulted in slightly lower performance than example 3.
On the other hand, the polyethylene glycol is added to improve the adhesiveness of the covering adhesive and the adhesive strength of the covering adhesive and the skeleton layer, but affects the flame retardance, so that the flame retardance of comparative example 2 is slightly higher than that of example 3, but the wear resistance and the adhesiveness are poor.
In addition, the invention is a rubber conveyer belt with excellent flame retardant property, aluminum hydroxide is added to improve the flame retardant property, and in order to improve the dispersibility of the aluminum hydroxide in a system, the aluminum hydroxide is subjected to microcapsule embedding, so that the flame retardant property of rubber is ensured. In addition, the adhesive property of the rubber conveyor belt can be improved by microencapsulating the aluminum hydroxide in the invention.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. The halogen-free flame retardant rubber conveyer belt comprises a covering rubber and a framework layer, and is characterized in that the raw materials of the covering rubber comprise the following components in parts by weight: 30-40 parts of hydrogenated nitrile rubber, 10-20 parts of methyl vinyl phenyl silicone rubber, 50-65 parts of ethylene propylene diene monomer rubber, 10-20 parts of polyethylene glycol, 20-40 parts of filler, 50-80 parts of microencapsulated aluminum hydroxide, 3-5 parts of cross-linking agent, 20-25 parts of adhesive and 10-15 parts of anti-aging agent;
the weight parts of the hydrogenated nitrile rubber, the methyl vinyl phenyl silicone rubber and the ethylene propylene diene monomer rubber meet the following standards:
hydrogenated nitrile rubber and methyl vinyl phenyl silicone rubber are less than ethylene propylene diene monomer rubber;
the microencapsulated aluminum hydroxide is prepared by the following steps:
s1, adding aluminum hydroxide into a solvent to uniformly disperse;
s2, adding silica sol and stirring;
s3, continuously adding a silane coupling agent and stirring;
s4, adding methacrylic acid-2-hydroxyethyl ester phosphate, stirring, filtering and drying.
2. The halogen-free flame retardant rubber conveyer belt according to claim 1, wherein the silane coupling agent comprises one or more of vinyl triethoxysilane, vinyl trimethoxysilane, gamma-methacryloxy trimethoxysilane.
3. The halogen-free flame retardant rubber conveyer belt according to claim 1, wherein the silica sol is silica sol with a silica content of 25% -29% and a pH of 9.0-10.5.
4. The halogen-free flame retardant rubber conveyer belt according to claim 1, wherein the particle size of the aluminum hydroxide is 1000-2000 mesh.
5. The halogen-free, flame retardant rubber conveyor belt of claim 1 wherein the solvent comprises one of methanol and ethanol.
6. The halogen-free flame retardant rubber conveyer belt according to claim 1, wherein the mass ratio of the aluminum hydroxide, the silica sol, the silane coupling agent and the 2-hydroxyethyl methacrylate phosphate is 10:3:1:2.
7. The halogen-free flame retardant rubber conveyer belt according to claim 1, wherein the crosslinking agent comprises one of dicumyl peroxide and bis-2, 4-dichlorobenzoyl peroxide.
8. The halogen-free, flame retardant rubber conveyor belt of claim 1 wherein the adhesive is a maleic anhydride type adhesive.
9. The method for producing the halogen-free flame retardant rubber conveyer belt according to claim 1, wherein the raw materials of the covering rubber are uniformly mixed to obtain the covering rubber, the covering rubber is attached to a framework layer, and the halogen-free flame retardant rubber conveyer belt is obtained after calendaring and vulcanizing by a vulcanizing press.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310394915.4A CN116102825B (en) | 2023-04-14 | 2023-04-14 | Halogen-free flame-retardant rubber conveyer belt and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310394915.4A CN116102825B (en) | 2023-04-14 | 2023-04-14 | Halogen-free flame-retardant rubber conveyer belt and production method thereof |
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| CN116102825A CN116102825A (en) | 2023-05-12 |
| CN116102825B true CN116102825B (en) | 2023-06-27 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731915A (en) * | 2011-04-01 | 2012-10-17 | 赢创德固赛有限公司 | Rubber mixtures |
| CN104828463A (en) * | 2015-04-09 | 2015-08-12 | 浙江三维橡胶制品股份有限公司 | Special conveyer belt for iron and steel sintered ore |
| CN106700562A (en) * | 2016-12-16 | 2017-05-24 | 安徽亚兰密封件有限公司 | High-hardness wear-resistant rubber sealing piece and preparation method thereof |
| CN113291005A (en) * | 2021-03-23 | 2021-08-24 | 上海米莜凯自动化装备有限公司 | High-performance conveying belt and preparation method thereof |
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- 2023-04-14 CN CN202310394915.4A patent/CN116102825B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731915A (en) * | 2011-04-01 | 2012-10-17 | 赢创德固赛有限公司 | Rubber mixtures |
| CN104828463A (en) * | 2015-04-09 | 2015-08-12 | 浙江三维橡胶制品股份有限公司 | Special conveyer belt for iron and steel sintered ore |
| CN106700562A (en) * | 2016-12-16 | 2017-05-24 | 安徽亚兰密封件有限公司 | High-hardness wear-resistant rubber sealing piece and preparation method thereof |
| CN113291005A (en) * | 2021-03-23 | 2021-08-24 | 上海米莜凯自动化装备有限公司 | High-performance conveying belt and preparation method thereof |
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| CN116102825A (en) | 2023-05-12 |
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