阅读说明：本技术 一种改性三元乙丙橡胶的加工工艺 (Processing technology of modified ethylene propylene diene monomer ) 是由 张鹏 陈巧娜 张有会 于 2019-04-09 设计创作，主要内容包括：一种改性三元乙丙橡胶的加工工艺,加工工艺为将三元乙丙橡胶和二元乙丙橡胶溶解于-80℃--20℃温度的溶剂中,30min搅拌均匀,得到溶解物A；将三乙烯基硅烷、三烯丙基三聚异氰酸酯溶解于-80℃--50℃温度的稀释剂中,30min搅拌均匀,得到溶解物B；将溶解物A和溶解物B及催化剂组合物搅拌均匀,在-80℃--50℃的温度范围内,反应时间为10-90min,存在下进行阳离子反应30min,反应结束后,得到的混合物料加入开炼机中混炼完全,得到改性三元乙丙橡胶。本发明改性三元乙丙橡胶的加工工艺,有效抑制引发体系的活性,从而解决其放热过快所带来的一系列问题。(A processing technology of modified ethylene propylene diene monomer rubber comprises the steps of dissolving ethylene propylene diene monomer rubber and ethylene propylene diene monomer rubber in a solvent at the temperature of-80-20 ℃, and uniformly stirring for 30min to obtain a dissolved substance A; dissolving trivinyl silane and triallyl isocyanurate in a diluent at the temperature of between 80 ℃ below zero and 50 ℃ below zero, and uniformly stirring for 30min to obtain a dissolved substance B; uniformly stirring the solute A, the solute B and the catalyst composition, carrying out a cationic reaction for 30min at the temperature ranging from-80 ℃ to-50 ℃ for 10-90min, and after the reaction is finished, adding the obtained mixed material into an open mill for complete mixing to obtain the modified ethylene propylene diene monomer. The processing technology of the modified ethylene propylene diene monomer effectively inhibits the activity of an initiation system, thereby solving a series of problems caused by the over-quick heat release of the ethylene propylene diene monomer.)

1. A processing technology of modified ethylene propylene diene monomer is characterized by comprising the following steps: the raw materials comprise ethylene propylene diene monomer, trivinyl silane and triallyl isocyanurate; the processing technology comprises the steps of dissolving ethylene propylene diene monomer and ethylene propylene diene monomer in a solvent at the temperature of-80-20 ℃, and uniformly stirring for 30min to obtain a dissolved substance A; dissolving trivinyl silane and triallyl isocyanurate in a diluent at the temperature of between 80 ℃ below zero and 50 ℃ below zero, and uniformly stirring for 30min to obtain a dissolved substance B; uniformly stirring the solute A, the solute B and the catalyst composition, carrying out a cationic reaction for 30min under the existence of 10-90min at the temperature ranging from-80 ℃ to-50 ℃, adding the obtained mixed material into an open mill for complete mixing after the reaction is finished, wherein the mixing temperature is 75-85 ℃, the mixing time is 3-4min, and ventilating to 15-35 ℃ to obtain the modified ethylene propylene diene monomer.

2. The process for preparing modified EPDM as claimed in claim 1, wherein said catalyst composition comprises catalyst A and catalyst B;

the catalyst A is ethyl aluminum sesquichloride, water, alkyl aluminum and nitroalkane; the mol ratio of the sesquichloride of the ethyl aluminum to the water is 1:0.001-5, the mol percentage of the alkyl aluminum is 0.1-5%, the mol percentage of the nitroalkane is 0.01-5%, and the volume ratio of the monomer to the solvent is 1:9-9: 1;

and the catalyst B is obtained by adding isoprene after aluminum trichloride is completely dissolved.

3. The processing technology of the modified ethylene propylene diene monomer rubber according to claim 1, wherein the mass concentration of the trivinyl silane in the solute B is 20% -45%, and the amount of triallyl isocyanurate is 5% -50% of the mass of the trivinyl silane; the content of aluminum trichloride in the added catalyst B is 0.05-0.3% of the mass of the trivinyl silane, and the content of isoprene is 1.5-5.5% of the mass of the trivinyl silane.

4. The process for producing modified EPDM as claimed in claim 1, wherein said diluent is halogenated alkane used in EPDM slurry; the halogenated alkane is methyl chloride, dichloromethane, difluoroethane or difluoromethane.

Technical Field

The invention relates to the field of ethylene propylene diene monomer processing, in particular to a processing technology of modified ethylene propylene diene monomer.

Background

Ethylene Propylene Diene Monomer (EPDM) is a terpolymer prepared by using ethylene and propylene as main monomers, adding unsaturated third monomer (non-conjugated diene) through solution. The ethylene propylene diene monomer rubber has no polar substituent group in a molecular chain, small steric hindrance, smooth molecular chain, excellent flexing resistance, rebound resilience, low temperature resistance, high tree formation resistance, good corona resistance and heat resistance and good structural stability.

In recent years, along with the high-speed development of Chinese economy, the contradiction of energy supply tension is more and more prominent, in order to meet the requirement, each large coal mine adopts high-power coal mining equipment to improve the productivity, the requirement of a cable matched with the coal mining equipment for transmitting power is continuously improved, ethylene propylene rubber insulation has high operation reliability and other advantages, such as high moisture resistance, almost no reduction of electrical and mechanical properties after soaking in water, good water resistance, good electricity resistance and good heat resistance, along with the technical development in the aspects of rubber production, processing and the like, the using amount of ethylene propylene rubber in the cable production is also continuously increased, the existing ethylene propylene rubber material can not meet the social requirement of high-speed development, and how to prepare the ethylene propylene diene monomer rubber compound becomes the technical problem needing to be solved at present.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a processing technology of modified ethylene propylene diene monomer.

The technical scheme adopted by the invention for solving the technical problems is as follows: a processing technology of modified ethylene propylene diene monomer comprises the following steps: the raw materials comprise ethylene propylene diene monomer, trivinyl silane and triallyl isocyanurate; the processing technology comprises the steps of dissolving ethylene propylene diene monomer and ethylene propylene diene monomer in a solvent at the temperature of-80-20 ℃, and uniformly stirring for 30min to obtain a dissolved substance A; dissolving trivinyl silane and triallyl isocyanurate in a diluent at the temperature of between 80 ℃ below zero and 50 ℃ below zero, and uniformly stirring for 30min to obtain a dissolved substance B; uniformly stirring the solute A, the solute B and the catalyst composition, carrying out a cationic reaction for 30min under the existence of 10-90min at the temperature ranging from-80 ℃ to-50 ℃, adding the obtained mixed material into an open mill for complete mixing after the reaction is finished, wherein the mixing temperature is 75-85 ℃, the mixing time is 3-4min, and ventilating to 15-35 ℃ to obtain the modified ethylene propylene diene monomer.

The invention also has the following additional technical features:

the technical scheme of the invention is further specifically optimized as follows: the catalyst composition comprises a catalyst A and a catalyst B.

The technical scheme of the invention is further specifically optimized as follows: the catalyst A is ethyl aluminum sesquichloride, water, alkyl aluminum and nitroalkane; the mol ratio of the sesquichloride of the ethyl aluminum to the water is 1:0.001-5, the mol percentage of the alkyl aluminum is 0.1-5%, the mol percentage of the nitroalkane is 0.01-5%, and the volume ratio of the monomer to the solvent is 1:9-9: 1.

The technical scheme of the invention is further specifically optimized as follows: and the catalyst B is obtained by adding isoprene after aluminum trichloride is completely dissolved.

The technical scheme of the invention is further specifically optimized as follows: the mass concentration of the trivinyl silane in the solute B is 20-45%, and the amount of triallyl isocyanurate is 5-50% of the mass of the trivinyl silane; the content of aluminum trichloride in the added catalyst B is 0.05-0.3% of the mass of the trivinyl silane, and the content of isoprene is 1.5-5.5% of the mass of the trivinyl silane.

The technical scheme of the invention is further specifically optimized as follows: the diluent is halogenated alkane which can be used for ethylene propylene diene monomer slurry; the halogenated alkane is methyl chloride, dichloromethane, difluoroethane or difluoromethane.

Compared with the prior art, the invention has the advantages that:

(1) the processing technology of the modified ethylene propylene diene monomer rubber has controllable process, allows reaction at more economic temperature, and has higher reaction yield and wide application prospect.

(2) The processing technology of the modified ethylene propylene diene monomer effectively inhibits the activity of an initiation system, thereby solving a series of problems caused by the over-quick heat release of the ethylene propylene diene monomer.

(3) The processing technology of the modified ethylene propylene diene monomer rubber of the invention obtains higher reaction rate while reducing energy consumption at relatively higher temperature.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below, which are for the purpose of providing a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be understood that the present invention should not be limited by the embodiments set forth herein.

A processing technology of modified ethylene propylene diene monomer comprises the following steps: the raw materials comprise ethylene propylene diene monomer, trivinyl silane and triallyl isocyanurate; the processing technology comprises the steps of dissolving ethylene propylene diene monomer and ethylene propylene diene monomer in a solvent at the temperature of-80-20 ℃, and uniformly stirring for 30min to obtain a dissolved substance A; dissolving trivinyl silane and triallyl isocyanurate in a diluent at the temperature of between 80 ℃ below zero and 50 ℃ below zero, and uniformly stirring for 30min to obtain a dissolved substance B; uniformly stirring the solute A, the solute B and the catalyst composition, carrying out a cationic reaction for 30min under the existence of 10-90min at the temperature ranging from-80 ℃ to-50 ℃, adding the obtained mixed material into an open mill for complete mixing after the reaction is finished, wherein the mixing temperature is 75-85 ℃, the mixing time is 3-4min, and ventilating to 15-35 ℃ to obtain the modified ethylene propylene diene monomer.

The catalyst composition comprises a catalyst A and a catalyst B.

The catalyst A is ethyl aluminum sesquichloride, water, alkyl aluminum and nitroalkane; the mol ratio of the sesquichloride of the ethyl aluminum to the water is 1:0.001-5, the mol percentage of the alkyl aluminum is 0.1-5%, the mol percentage of the nitroalkane is 0.01-5%, and the volume ratio of the monomer to the solvent is 1:9-9: 1.

And the catalyst B is obtained by adding isoprene after aluminum trichloride is completely dissolved.

The mass concentration of the trivinyl silane in the solute B is 20-45%, and the amount of triallyl isocyanurate is 5-50% of the mass of the trivinyl silane; the content of aluminum trichloride in the added catalyst B is 0.05-0.3% of the mass of the trivinyl silane, and the content of isoprene is 1.5-5.5% of the mass of the trivinyl silane.

The diluent is halogenated alkane which can be used for ethylene propylene diene monomer slurry; the halogenated alkane is methyl chloride, dichloromethane, difluoroethane or difluoromethane.