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Preparation method of anti-aging ethylene-propylene rubber powder-based EVA thermoplastic elastomer sealing element

A thermoplastic elastomer, ethylene propylene rubber powder technology, used in building components, building insulation materials, construction and other directions, can solve the problems of being unsuitable for making high-end products, RPTPE has a strong smell, poor performance stability, etc. The effect of excellent ozone aging performance and reduction of raw material cost

Inactive Publication Date: 2021-10-26
XUZHOU COLLEGE OF INDAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the following common problems exist in the production of rubber powder-based thermoplastic elastomers: poor mechanical properties; poor performance stability; expensive; RPTPE has a strong smell and is not suitable for making high-end products

Method used

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  • Preparation method of anti-aging ethylene-propylene rubber powder-based EVA thermoplastic elastomer sealing element
  • Preparation method of anti-aging ethylene-propylene rubber powder-based EVA thermoplastic elastomer sealing element
  • Preparation method of anti-aging ethylene-propylene rubber powder-based EVA thermoplastic elastomer sealing element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Activate 21Kg, 100 mesh and above waste ethylene-propylene rubber powder at 200°C for 30 minutes.

[0023] At room temperature, masticate 4.5Kg butadiene rubber for 5 minutes, and disperse the above-mentioned activated ethylene-propylene rubber fine powder of 100 mesh or above and 4.5Kg transparent EVA particles in a kneader. The butadiene rubber plastic compound is added to the above-mentioned mixture and kneaded evenly to obtain a kneaded plastic.

[0024] Add 0.09Kg, sulfur, 0.33Kg, compatibilizer BIBP, 1.5Kg, zinc oxide, 0.09Kg, stearic acid, 0.09Kg, antioxidant 1010 to the mixed plastic in the twin-screw extruder at 180°C, Disperse evenly, and carry out cross-linking reaction with the help of dynamic cross-linking system and strong mechanical shear stress to obtain ethylene-propylene rubber powder-based thermoplastic elastomer for EVA water pipes, and molded into sheets.

Embodiment 2

[0026] Activate 21Kg of 100 mesh and above waste ethylene-propylene rubber powder at 200°C for 30 minutes.

[0027] At room temperature, 3.0Kg butadiene rubber was masticated for 5 minutes, and the above-mentioned activated ethylene-propylene rubber fine powder of 100 mesh and above and 6.0Kg transparent ethylene-vinyl acetate copolymer EVA particles were uniformly dispersed in a kneader. Add the above-mentioned mixture to the butadiene rubber plastic compound at +5°C and knead evenly to obtain a kneaded plastic.

[0028] Add 0.09Kg of sulfur, 0.33Kg of compatibilizer BIBP, 1.5Kg of zinc oxide, 0.09Kg of stearic acid, 0.09Kg of antioxidant 1010 and other compounding agents into the kneading plastic in a twin-screw extruder at 180°C to disperse evenly. When rubber powder, plastic resin and various compounding agents are reacted and compounded, the dynamic cross-linking system and strong mechanical shear stress are used to carry out cross-linking reaction to obtain ethylene-prop...

Embodiment 3

[0030] Activate 18Kg of 100 mesh and above waste ethylene-propylene rubber powder at 200°C for 30 minutes.

[0031] Masticate 6.0Kg butadiene rubber for 5 minutes at room temperature, disperse the activated ethylene-propylene rubber fine powder of 100 mesh or above and 6.0Kg transparent EVA particles in a kneader, The above-mentioned mixture is added to the butadiene rubber plastic compound and kneaded evenly to obtain a kneaded plastic.

[0032] Add 0.09Kg, sulfur, 0.33Kg, compatibilizer BIBP, 1.5Kg, zinc oxide, 0.09Kg, stearic acid, 0.09Kg, antioxidant 1010 to the mixed plastic in the twin-screw extruder at 180°C, Disperse evenly, and carry out cross-linking reaction with the help of dynamic cross-linking system and strong mechanical shear stress to obtain ethylene-propylene rubber powder-based thermoplastic elastomer for EVA water pipes, and molded into sheets.

[0033] Perform performance testing according to GB / T21874-2008,

[0034] Table 1 Performance of thermoplastic ...

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Abstract

The invention discloses a preparation method of an anti-aging ethylene-propylene rubber powder-based EVA thermoplastic elastomer sealing element. The preparation method comprises the steps: activating waste ethylene propylene rubber powder at the temperature of 200 DEG C for 30 minutes; plasticizing butadiene rubber for 5 min at normal temperature, uniformly dispersing the activated ethylene propylene rubber fine rubber powder and the transparent ethylene-vinyl acetate copolymer in a kneading machine, adding the mixture into butadiene rubber plasticated rubber at the temperature of 160+ / -5 DEG C, and uniformly mixing to obtain mixed plastic; and adding a vulcanizing agent, a compatilizer, zinc oxide, stearic acid and an antioxidant 1010 into mixed plastic in a double-screw extruder at the temperature of 180 DEG C, uniformly dispersing, and carrying out a cross-linking reaction on rubber powder, EVA resin and various compounding ingredients to obtain an thermoplastic elastomer for the ethylene-propylene rubber powder-based EVA water pipe sealing element, and carrying out mold pressing into sheets.

Description

technical field [0001] The invention relates to the technical field of polymer material preparation, in particular to a preparation method of an aging-resistant ethylene propylene rubber powder-based EVA thermoplastic elastomer seal. Background technique [0002] Thermoplastic elastomers occupy an increasingly important position in the application field of rubber products, and the demand has also increased significantly. In order to reduce the cost of thermoplastic elastomers, increase the recycling of waste tires, and promote the popularization and application of thermoplastic elastomers, people have researched and developed rubber powder-based thermoplastic elastomers (RPTPE). Rubber powder-based thermoplastic elastomer is prepared by blending rubber powder and thermoplastic resin, which has the advantages of simple processing and low processing cost. In addition, the cost of rubber powder is low and its dosage is large (generally 50% of the total mass ~90%), which can gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/08C08L9/00C08L95/00
CPCC08L23/16C08L2201/08C08L2203/18C08L23/0853C08L9/00C08L95/00C08L2207/04C09D123/16C08J5/18C08J3/18C08J3/20C08J2323/16C08J2423/08C08J2409/00C08J3/005C08J3/24C08K5/14C08K3/06
Inventor 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
Owner XUZHOU COLLEGE OF INDAL TECH
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