Production process of environment-friendly rubber

Abstract

The invention discloses a production process of environment-friendly rubber. According to the production process, vanadium acetylacetonate and AlEt2Cl are used as a catalyst, dichlorodiethyl malonateis used as an activator, HNB or DCPD is used as a third monomer, and diethyl zinc and hydrogen are used as a molecular weight regulator. Depending on different product brands, ethylene, propylene, thethird monomer and the catalyst are added into a jacketed polymerization vessel with a multi-blade stirrer. The reaction conditions are as follows: temperature range is -20 to 20 DEG C, and pressure is 0.35-1.05 MPa. The heat of reaction is removed by evaporation of a monomer of the reaction phase. The mass fraction of a suspended polymer in the reaction phase is controlled to be 30% to 35%, and the entire polymerization reaction is carried out under a high degree of automatic control, and the generated polymer propylene slurry is intermittently (10-15 times / h) sent into a scrubber. The catalyst is deactivated by the use of polypropylene glycol and then washed with an aqueous solution of NaOH. The suspension is sent to a stripping tower for stripping, and the unreacted ethylene, propyleneand ENB are respectively refined through a recovery system and recycled. The rubber-slurry is dehydrated through a vibrating screen, squeezed and dried, pressed and packaged to obtain the finished rubber. According to the technical scheme, the production process is characterized in that no solvent is used for the polymerization and refinement, the polymer concentration is high, the equipment production capacity is enhanced, the solvent circulation and recovery are omitted, and energy is saved.

Description

technical field [0001] The invention relates to a solution polymerization method, in particular to a production process of environment-friendly rubber. Background technique [0002] Ethylene-propylene rubber (EPR) is a kind of ethylene that came out after the invention of Zieg1er-Natta catalyst and the appearance of polyethylene and polypropylene. Copolymerized rubber with propylene as the basic monomer is divided into two categories: ethylene-propylene-diene rubber (EPM) and ethylene-propylene-diene rubber (EPDM). The former is a copolymer of ethylene and propylene; the latter is a copolymer of ethylene, propylene and a small amount of non-conjugated dienes. EPR has many excellent properties that other general-purpose synthetic rubbers do not have. In addition, the monomer is cheap and easy to get, and has a wide range of uses. It is the fastest-growing one among the seven foreign synthetic rubber varieties since the 1980s. The quantity ranks third in developed countries,...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of production technology of environment-friendly type rubber, to solve the problem of the prior art that proposes in the above-mentioned background technology