阅读说明：本技术 三元乙丙绝缘胶料及其制备方法 (Ethylene-propylene-diene monomer insulating rubber material and preparation method thereof ) 是由 刘波 孙剑飞 赵俊佳 周彪 胡彬彬 唐滔 于 2019-11-08 设计创作，主要内容包括：本发明提供一种高粘性的三元乙丙绝缘胶料,原料以重量份计包括三元乙丙生胶100份、补强剂15～25份、填充剂30～50份、氧化锌5～10份、硬脂酸1～3份、防老剂0.5～1份、硅烷偶联剂1～2份、增粘剂5～10份、软化剂4～8份、交联促进剂1～3份、硫化剂3～5份；将三元乙丙生胶密炼,然后依次加入氧化锌、防老剂、补强剂、硅烷偶联剂、填充剂、硬脂酸、软化剂、增粘剂,混炼后出料；加入硫化剂和交联促进剂开炼得到所述三元乙丙绝缘胶料。该胶料提高了绝缘材料与半导电材料之间的粘接面的平滑度和粘结性,省去了粘接面的涂层或打磨工序,使得终端结构始终保持优良的电气性能,保证电缆运行的可靠性和使用寿命。(The invention provides a high-viscosity ethylene-propylene-diene monomer insulating rubber material which comprises, by weight, 100 parts of ethylene-propylene-diene monomer raw rubber, 15-25 parts of a reinforcing agent, 30-50 parts of a filler, 5-10 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-1 part of an anti-aging agent, 1-2 parts of a silane coupling agent, 5-10 parts of a tackifier, 4-8 parts of a softener, 1-3 parts of a crosslinking accelerator and 3-5 parts of a vulcanizing agent; banburying raw ethylene propylene diene monomer, then sequentially adding zinc oxide, an anti-aging agent, a reinforcing agent, a silane coupling agent, a filling agent, stearic acid, a softening agent and a tackifier, mixing and discharging; adding a vulcanizing agent and a crosslinking accelerator, and carrying out open milling to obtain the ethylene propylene diene monomer insulating rubber material. The sizing material improves the smoothness and the cohesiveness of a bonding surface between the insulating material and the semi-conductive material, and omits a coating or polishing procedure of the bonding surface, so that the terminal structure always keeps excellent electrical performance, and the running reliability and the service life of the cable are ensured.)

1. The ethylene-propylene-diene monomer insulating rubber material is characterized by comprising 100 parts by weight of raw ethylene-propylene-diene monomer, 15-25 parts by weight of reinforcing agent, 30-50 parts by weight of filler, 5-10 parts by weight of zinc oxide, 1-3 parts by weight of stearic acid, 0.5-1 part by weight of anti-aging agent, 1-2 parts by weight of silane coupling agent, 5-10 parts by weight of tackifier, 4-8 parts by weight of softener, 1-3 parts by weight of crosslinking accelerator and 3-5 parts by weight of vulcanizing agent;

banburying raw ethylene propylene diene monomer, then sequentially adding zinc oxide, an anti-aging agent, a reinforcing agent, a silane coupling agent, a filling agent, stearic acid, a softening agent and a tackifier, mixing and discharging; adding a vulcanizing agent and a crosslinking accelerator, and carrying out open milling to obtain the ethylene propylene diene monomer insulating rubber material.

2. The ethylene-propylene-diene monomer insulation compound according to claim 1, wherein the tackifier is at least one of liquid ethylene-propylene rubber, liquid polyisobutylene, or petroleum resin.

3. The ethylene-propylene-diene monomer insulating compound of claim 1, wherein the raw ethylene-propylene-diene monomer rubber comprises at least one of a first ethylene-propylene-diene monomer rubber or a second ethylene-propylene-diene monomer rubber; the first ethylene propylene diene monomer contains 4-5% of ENB, 45-60% of ethylene and 20-30% of Mooney viscosity ML125 ℃ (1+ 4); the second ethylene propylene diene monomer contains 7-12% of ENB, 45-60% of ethylene and 35-66% of Mooney viscosity ML125 ℃ (1+ 4).

4. The ethylene-propylene-diene monomer insulation compound of claim 1, wherein the reinforcing agent is fumed silica.

5. The ethylene-propylene-diene monomer insulation compound of claim 1, wherein the filler is at least one of calcined kaolin or talc.

6. The ethylene propylene diene monomer insulation compound of claim 1, wherein the antioxidant is at least one of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer or 2-mercaptobenzimidazole.

7. The ethylene-propylene-diene monomer insulation compound according to claim 1, wherein the silane coupling agent is any one of vinyl tris (β -methoxyethoxy) silane or bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the softening agent is at least one of paraffin oil or polyethylene wax.

8. The ethylene-propylene-diene monomer insulation compound of claim 1, wherein the crosslinking promoter is triallyl isocyanurate; the vulcanizing agent is dicumyl peroxide.

9. The ethylene-propylene-diene monomer insulation compound according to any one of claims 1 to 8, wherein the compounded compound is filtered, placed, completely cooled and then added with the vulcanizing agent and the crosslinking accelerator for open mixing; the filter screen is at least 3 layers, and the filtering temperature is 150-170 ℃.

10. The ethylene-propylene-diene monomer insulating compound according to claim 9, wherein the vulcanizing agent and the crosslinking accelerator are added for 3-5 times, and the open mixing temperature is controlled below 80 ℃.

Technical Field

The invention belongs to the technical field of insulating materials, and particularly relates to an ethylene propylene diene monomer insulating rubber material and a preparation method thereof.

Background

The ethylene propylene diene rubber material is widely used as a cable insulating material due to the characteristics of excellent electrical property, high heat resistance and aging resistance, good mechanical property and the like. But because the molecular structure of the ethylene propylene diene rubber material lacks active groups, the cohesive energy is low, the rubber material is easy to frost, and the self-adhesiveness and the mutual adhesiveness are poor. The existing production process of the ternary ethylene-propylene rubber stress cone and the intermediate joint in various cable accessories generally realizes the improvement of the bonding performance of a semi-conductive material and an insulating material by using a coating on the contact surface of the semi-conductive material and the insulating material or by polishing the contact surface of the semi-conductive material and the insulating material, but the coating and polishing processes have the problems of insufficient smoothness of the surface and insufficient bonding degree, and influence on the electric field uniformity characteristic of the stress cone.

Therefore, it is necessary to provide a high-viscosity ethylene propylene diene monomer insulating compound and a preparation method thereof.

Disclosure of Invention

The invention aims to provide a high-viscosity ethylene propylene diene monomer insulating rubber material and a preparation method thereof, and aims to solve the technical problem that the bonding performance between the ethylene propylene diene monomer insulating rubber material and a semiconductive material is poor in the manufacturing process of a cable accessory in the prior art.

The invention provides an ethylene-propylene-diene monomer insulating rubber material which comprises, by weight, 100 parts of ethylene-propylene-diene monomer raw rubber, 15-25 parts of a reinforcing agent, 30-50 parts of a filler, 5-10 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-1 part of an anti-aging agent, 1-2 parts of a silane coupling agent, 5-10 parts of a tackifier, 4-8 parts of a softener, 1-3 parts of a crosslinking accelerator and 3-5 parts of a vulcanizing agent;

banburying raw ethylene propylene diene monomer, then sequentially adding zinc oxide, an anti-aging agent, a reinforcing agent, a silane coupling agent, a filling agent, stearic acid, a softening agent and a tackifier, mixing and discharging; adding a vulcanizing agent and a crosslinking accelerant and carrying out open milling to obtain the ethylene propylene diene monomer insulating rubber material.

Further, the tackifier is at least one of liquid ethylene propylene rubber, liquid polyisobutylene or petroleum resin.

Further, the ethylene propylene diene raw rubber comprises at least one of first ethylene propylene diene monomer rubber or second ethylene propylene diene monomer rubber; the first ethylene propylene diene monomer contains 4-5% of ENB, 45-60% of ethylene and 20-30% of Mooney viscosity ML125 ℃ (1+ 4); the second ethylene propylene diene monomer contains 7-12% of ENB, 45-60% of ethylene and 35-66% of Mooney viscosity ML125 ℃ (1+ 4).

Further, the reinforcing agent is fumed silica.

Further, the filler is at least one of calcined kaolin or talc.

Further, the anti-aging agent is at least one of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer or 2-mercaptobenzimidazole.

Further, the silane coupling agent is any one of vinyl tri (β -methoxyethoxy) silane or bis- [ gamma- (triethoxysilyl) propyl ] tetrasulfide, and the softening agent is at least one of paraffin oil or polyethylene wax.

Further, the crosslinking accelerator is triallyl isocyanurate; the vulcanizing agent is dicumyl peroxide.

Further, filtering the mixed rubber material, standing, completely cooling, adding the vulcanizing agent and the crosslinking accelerator, and open mixing; the filter screen is at least 3 layers, and the filtering temperature is 150-170 ℃.

Further, the vulcanizing agent and the crosslinking accelerator are added for 3-5 times, and the open mixing temperature is controlled to be below 80 ℃.

The ethylene propylene diene monomer insulating rubber material provided by the invention has the beneficial effects that: the high-viscosity ethylene propylene diene monomer insulating rubber material is prepared by applying the raw material formula, so that a coating or polishing process of a semi-conductive material bonding surface in a manufacturing process of a cable accessory can be omitted, smoothness and cohesiveness of the bonding surface between the insulating material and the semi-conductive material are improved, a terminal structure always keeps excellent electrical performance, and reliability and service life of operation of a cable are guaranteed.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to explain the technical solution of the present invention, the following detailed description is made with reference to specific examples.