CN113549280A - Preparation method of aging-resistant ethylene propylene rubber powder-based EVA (ethylene-vinyl acetate) thermoplastic elastomer sealing element - Google Patents

Preparation method of aging-resistant ethylene propylene rubber powder-based EVA (ethylene-vinyl acetate) thermoplastic elastomer sealing element Download PDF

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CN113549280A
CN113549280A CN202110948398.1A CN202110948398A CN113549280A CN 113549280 A CN113549280 A CN 113549280A CN 202110948398 A CN202110948398 A CN 202110948398A CN 113549280 A CN113549280 A CN 113549280A
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rubber powder
ethylene propylene
propylene rubber
thermoplastic elastomer
ethylene
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王艳秋
祝木伟
刘太闯
翁国文
柳峰
臧亚南
靳玲
姚亮
张小萍
徐云慧
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Xuzhou College of Industrial Technology
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    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08J3/18—Plasticising macromolecular compounds
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    • 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
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    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
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    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—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
    • C08J2323/16—Ethene-propene or ethene-propene-diene copolymers
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    • 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
    • C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/18—Applications used for pipes
    • 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
    • C08L2207/04—Thermoplastic elastomer

Abstract

The invention discloses a preparation method of an aging-resistant ethylene propylene rubber powder-based EVA (ethylene-vinyl acetate) thermoplastic elastomer sealing element, which comprises the steps of activating waste ethylene propylene rubber powder for 30min at the temperature of 200 ℃; plasticating the butadiene rubber for 5min at normal temperature, uniformly dispersing the activated ethylene-propylene rubber fine rubber powder and the transparent ethylene-vinyl acetate copolymer in a kneader, adding the mixture into the butadiene rubber plasticated rubber at 160 +/-5 ℃ and uniformly mixing to obtain a mixed plastic rubber; adding a vulcanizing agent, a compatilizer, zinc oxide, stearic acid and an antioxidant 1010 into the plastification in a double-screw extruder at 180 ℃, uniformly dispersing, carrying out crosslinking reaction on rubber powder, EVA resin and various compounding agents to obtain the thermoplastic elastomer for the ethylene propylene rubber powder-based EVA water pipe sealing element, and molding into a sheet.

Description

Preparation method of aging-resistant ethylene propylene rubber powder-based EVA (ethylene-vinyl acetate) thermoplastic elastomer sealing element
Technical Field
The invention relates to the technical field of high polymer material preparation, in particular to a preparation method of an aging-resistant ethylene propylene rubber powder-based EVA thermoplastic elastomer sealing element.
Background
Thermoplastic elastomers are becoming more and more important in the field of rubber article applications, and the demand is also increasing substantially. In order to reduce the cost of the thermoplastic elastomer, increase the recycling of waste tires and promote the popularization and application of the thermoplastic elastomer, rubber powder-based thermoplastic elastomer (RPTPE) is researched and developed. The rubber powder-based thermoplastic elastomer is prepared by blending rubber powder and thermoplastic resin, has the advantages of simple processing and lower processing cost, and can greatly reduce the cost of the thermoplastic elastomer due to the lower cost of the rubber powder and the larger consumption (generally accounting for 50-90 percent of the total mass). In addition, the rubber powder can be prepared from waste tires, a new way is provided for solving the problem of black pollution of the waste tires, and meanwhile, the thermoplastic elastomer can be recycled, so that the rubber powder conforms to the sustainable development road of China. Therefore, the rubber powder-based thermoplastic elastomer has good development prospect.
The following common problems exist in the production of the rubber powder-based thermoplastic elastomer at present: the mechanical property is poor; the performance stability is poor; the price is high; RPTPE has a strong odor and is not suitable for making high-grade products.
Disclosure of Invention
The invention aims to provide a preparation method of an aging-resistant ethylene propylene rubber powder-based EVA thermoplastic elastomer sealing element, which is low in cost and excellent in performance.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a preparation method of an aging-resistant ethylene propylene rubber powder-based EVA (ethylene-vinyl acetate) thermoplastic elastomer sealing element is prepared from the following raw materials in parts by mass:
Figure RE-GDA0003249824530000011
Figure RE-GDA0003249824530000021
the preparation method comprises the following steps:
step 1) activating the waste ethylene propylene rubber powder for 30min at the temperature of 200 ℃;
step 2) plasticating the butadiene rubber for 5min at normal temperature, then uniformly dispersing the waste ethylene propylene rubber powder and the ethylene-vinyl acetate copolymer activated in the step 1) in a kneading machine, adding the mixture into the butadiene rubber plasticated rubber at the temperature of 160 +/-5 ℃, and then adding a regeneration activating agent and pine tar for uniformly mixing to obtain synthetic plastic rubber;
and 3) adding the synthetic plastic, a vulcanizing agent, a compatilizer, zinc oxide, stearic acid and an antioxidant 1010 into a double-screw extruder at 180 ℃, uniformly dispersing, carrying out crosslinking reaction by virtue of a dynamic crosslinking system and strong mechanical shear stress to obtain the thermoplastic elastomer for the ethylene propylene rubber powder-based EVA water pipe, and molding into sheets.
The preferable scheme of the preparation method of the aging-resistant ethylene propylene rubber powder-based EVA thermoplastic elastomer sealing element provided by the invention is as follows: the particle size of the waste ethylene propylene rubber powder is 100 meshes or more.
The preferable scheme of the preparation method of the aging-resistant ethylene propylene rubber powder-based EVA thermoplastic elastomer sealing element provided by the invention is as follows: the ethylene-vinyl acetate copolymer adopts granular solid.
The preferable scheme of the preparation method of the aging-resistant ethylene propylene rubber powder-based EVA thermoplastic elastomer sealing element provided by the invention is as follows: the vulcanizing agent is sulfur.
The preferable scheme of the preparation method of the aging-resistant ethylene propylene rubber powder-based EVA thermoplastic elastomer sealing element provided by the invention is as follows: the compatilizer is bis-tert-butylperoxydiisopropylbenzene.
Compared with the prior art, the invention has the following beneficial effects:
(1) the TPE for the aging-resistant ethylene propylene rubber powder-based EVA water pipe prepared by the invention has the tensile strength of 10.5 MPa, the elongation at break of 778 percent and the Shore hardness of 54-59; compression set of 17.90-24.53% and water resistance of 2.28-4.12%; the aging resistance thermal-oxidative aging resistance has the hardness change of +1 to +5, the strength change rate of-4.85 to 5.69 percent, the elongation change rate of 4.66 to 11.18 percent, and excellent ozone aging resistance without cracks.
(2) The invention adopts the activated EPDM rubber powder with 100 meshes or more, the fine ethylene propylene rubber powder with 100 meshes or more is easier to disperse and uniform than ethylene propylene rubber, EVA and butadiene rubber, the invention is not easy to stick a screw rod in the dynamic crosslinking process, is environment-friendly and pollution-free, and the TPE for the ethylene propylene rubber powder-based EVA water pipe has excellent comprehensive performance.
(3) The invention fully utilizes the characteristic that the waste rubber powder is easy to disperse, solves the problem of environmental pollution caused by directly discarding the waste ethylene propylene rubber, changes the waste ethylene propylene rubber into valuable, reduces the raw material cost by 45-55%, and increases the profit of EPDM RP/EVA TPE by more than 100% compared with EPDM/EVA TPE.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
Activating 21Kg of waste ethylene propylene rubber powder of 100 meshes or above for 30min at the temperature of 200 ℃.
Plasticating 4.5Kg of butadiene rubber for 5min at normal temperature, uniformly dispersing the activated ethylene propylene rubber fine powder of 100 meshes or more and 4.5Kg of transparent EVA particles in a kneader, and adding the mixture into the butadiene rubber plasticated at 160+5 ℃ for uniform mixing to obtain the synthetic rubber.
Adding 0.09Kg of sulfur, 0.33Kg of compatilizer BIBP, 1.5Kg of zinc oxide, 0.09Kg of stearic acid, 0.09Kg of antioxidant 1010 into the synthetic plastic rubber in a double-screw extruder at 180 ℃, uniformly dispersing, carrying out crosslinking reaction by virtue of a dynamic crosslinking system and strong mechanical shear stress to obtain the thermoplastic elastomer for the ethylene propylene rubber powder-based EVA water pipe, and molding into sheets.
Example 2
Activating 21Kg of waste ethylene propylene rubber powder of 100 meshes and above for 30min at the temperature of 200 ℃.
Plasticating 3.0Kg of butadiene rubber for 5min at normal temperature, uniformly dispersing the activated ethylene-propylene rubber fine rubber powder of 100 meshes or more and 6.0Kg of transparent ethylene-vinyl acetate copolymer EVA particles in a kneader, and adding the mixture into the butadiene rubber plasticated rubber at 160+5 ℃ for uniform mixing to obtain the synthetic rubber.
Adding 0.09Kg of sulfur, 0.33Kg of compatilizer BIBP, 1.5Kg of zinc oxide, 0.09Kg of stearic acid, 0.09Kg of antioxidant 1010 and other compounding agents into the synthetic plastic rubber in a double-screw extruder at 180 ℃, uniformly dispersing, and carrying out crosslinking reaction by virtue of a dynamic crosslinking system and strong mechanical shear stress when the rubber powder, the plastic resin and the various compounding agents are compounded in a reaction manner to obtain the ethylene propylene rubber powder-based EVA thermoplastic elastomer for the water pipe, and molding into sheets.
Example 3
18Kg of waste ethylene propylene rubber powder of 100 meshes and above is activated for 30min at the temperature of 200 ℃.
Plasticating 6.0Kg of butadiene rubber for 5min at normal temperature, uniformly dispersing the activated ethylene propylene rubber fine powder of 100 meshes or more and 6.0Kg of transparent EVA particles in a kneader, and adding the mixture into the butadiene rubber plasticated at 160+5 ℃ for uniform mixing to obtain the synthetic rubber.
Adding 0.09Kg of sulfur, 0.33Kg of compatilizer BIBP, 1.5Kg of zinc oxide, 0.09Kg of stearic acid, 0.09Kg of antioxidant 1010 into the synthetic plastic rubber in a double-screw extruder at 180 ℃, uniformly dispersing, carrying out crosslinking reaction by virtue of a dynamic crosslinking system and strong mechanical shear stress to obtain the thermoplastic elastomer for the ethylene propylene rubber powder-based EVA water pipe, and molding into sheets.
Performance testing was performed according to GB/T21874-2008,
TABLE 1 Properties of thermoplastic elastomer sealing elements for ethylene propylene rubber powder based EVA Water pipes
Figure RE-GDA0003249824530000041
As can be seen from Table 1, the performance indexes of the thermoplastic elastomer for the ethylene propylene rubber powder-based EVA water pipe prepared by the invention far exceed and meet the requirements of the national standard GB/T21874-2008 thermoplastic elastomer for the material requirement of the drainage pipeline joint sealing element of the elastomer sealing element.

Claims (5)

1. A preparation method of an aging-resistant ethylene propylene rubber powder-based EVA thermoplastic elastomer sealing element for a water pipe is characterized by comprising the following steps: the feed is prepared from the following raw materials in parts by mass:
15-20 parts of ethylene-vinyl acetate copolymer,
10-20 parts of butadiene rubber,
60-70 parts of waste ethylene propylene rubber powder,
5102.0 parts of a regeneration activating agent, namely,
15.0 parts of pine tar oil,
0.8 to 1.3 portions of compatilizer,
0.3 part of a vulcanizing agent,
5.0 parts of zinc oxide, namely zinc oxide,
0.3 part of stearic acid, namely,
10100.3 parts of an antioxidant;
the preparation method comprises the following steps:
step 1) activating the waste ethylene propylene rubber powder for 30min at the temperature of 200 ℃;
step 2) plasticating the butadiene rubber for 5min at normal temperature, then uniformly dispersing the waste ethylene propylene rubber powder and the ethylene-vinyl acetate copolymer activated in the step 1) in a kneading machine, adding the mixture into the butadiene rubber plasticated rubber at the temperature of 160 +/-5 ℃, and then adding a regeneration activating agent and pine tar for uniformly mixing to obtain synthetic plastic rubber;
and 3) adding the synthetic plastic, a vulcanizing agent, a compatilizer, zinc oxide, stearic acid and an antioxidant 1010 into a double-screw extruder at 180 ℃, uniformly dispersing, carrying out crosslinking reaction by virtue of a dynamic crosslinking system and strong mechanical shear stress to obtain the thermoplastic elastomer for the ethylene propylene rubber powder-based EVA water pipe, and molding into sheets.
2. The preparation method of the thermoplastic elastomer sealing element for the aging-resistant ethylene propylene rubber powder-based EVA water pipe according to claim 1, characterized in that: the particle size of the waste ethylene propylene rubber powder is 100 meshes or more.
3. The preparation method of the thermoplastic elastomer sealing element for the aging-resistant ethylene propylene rubber powder-based EVA water pipe according to claim 1, characterized in that: the ethylene-vinyl acetate copolymer adopts granular solid.
4. The preparation method of the thermoplastic elastomer sealing element for the aging-resistant ethylene propylene rubber powder-based EVA water pipe according to claim 1, characterized in that: the vulcanizing agent is sulfur.
5. The preparation method of the thermoplastic elastomer sealing element for the aging-resistant ethylene propylene rubber powder-based EVA water pipe according to claim 1, characterized in that: the compatilizer is bis-tert-butylperoxydiisopropylbenzene.
CN202110948398.1A 2021-08-18 2021-08-18 Preparation method of aging-resistant ethylene propylene rubber powder-based EVA (ethylene-vinyl acetate) thermoplastic elastomer sealing element Withdrawn CN113549280A (en)

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GB2207367.0A GB2610017B (en) 2021-08-18 2022-05-19 Preparation method of ethylene propylene rubber (EPR) powder-based ethylene-vinyl acetate (EVA) anti-agin thermoplastic elastomer (TPE) seal for water pipe

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2610017A (en) * 2021-08-18 2023-02-22 Xuzhou College Ind Technology Preparation method of ethylene propylene rubber (EPR) powder-based ethylene-vinyl acetate (EVA) anti-aging thermoplastic elastomer (TPE) seal for water pipe
CN117209947A (en) * 2023-09-26 2023-12-12 广州美村橡胶科技股份有限公司 Composite modified ethylene propylene diene monomer rubber material for sealing water pipe and preparation method thereof

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CN104559843A (en) * 2014-12-31 2015-04-29 广州鹿山新材料股份有限公司 Hot melt adhesive film for adhering rubber/foamed EVA (ethylene-vinyl acetate copolymer) composite sole and preparation method thereof
CN106240278A (en) * 2016-08-10 2016-12-21 安徽东升精密铸钢件有限公司 A kind of wear-resisting stabilizer bushing of grinding tooth shape
CN110256837A (en) * 2019-04-28 2019-09-20 东莞华工佛塑新材料有限公司 A kind of composition and preparation method thereof being used to prepare wear-resisting waterproof high resiliency foamed material
CN110144066A (en) * 2019-05-29 2019-08-20 李宁（中国）体育用品有限公司 A kind of water swelling rubber and preparation method thereof, sole and shoes
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CN113549280A (en) * 2021-08-18 2021-10-26 徐州工业职业技术学院 Preparation method of aging-resistant ethylene propylene rubber powder-based EVA (ethylene-vinyl acetate) thermoplastic elastomer sealing element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2610017A (en) * 2021-08-18 2023-02-22 Xuzhou College Ind Technology Preparation method of ethylene propylene rubber (EPR) powder-based ethylene-vinyl acetate (EVA) anti-aging thermoplastic elastomer (TPE) seal for water pipe
GB2610017B (en) * 2021-08-18 2023-10-11 Xuzhou College Ind Technology Preparation method of ethylene propylene rubber (EPR) powder-based ethylene-vinyl acetate (EVA) anti-agin thermoplastic elastomer (TPE) seal for water pipe
CN117209947A (en) * 2023-09-26 2023-12-12 广州美村橡胶科技股份有限公司 Composite modified ethylene propylene diene monomer rubber material for sealing water pipe and preparation method thereof
CN117209947B (en) * 2023-09-26 2024-03-15 广州美村橡胶科技股份有限公司 Composite modified ethylene propylene diene monomer rubber material for sealing water pipe and preparation method thereof

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