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Glue solution coacervation method of ethylene propylene rubber

A technology of ethylene-propylene rubber and glue solution, applied in the field of ethylene-propylene rubber glue solution coagulation, can solve the problems of shaft holding, rubber particle core, high strength of rubber particles in agglomeration kettle, and achieve the reduction of steam consumption and energy consumption. Effect

Active Publication Date: 2016-02-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And it is prone to problems such as the phenomenon of colloidal particles sandwiching, the strength of colloidal particles in the coagulation tank is too high, it is not easy to chop, colloidal particles agglomerate, clogging and colloidal particles hold shafts, etc.

Method used

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  • Glue solution coacervation method of ethylene propylene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This example figure 1 As shown, the three-pot coagulation process is used to illustrate the coagulation method of ethylene-propylene rubber glue.

[0041] 130m from after-processing unit 3 The circulating hot water of / h is sent to the coagulation unit through the hot water pump, and the content of ethylene-propylene rubber in the hydrogel static mixer is 8.5% by weight (the rest is solvent cyclohexane 60% by weight and polymerized monomers such as ethylene, propylene, ENB), the flow rate is 85m 3 / h of ethylene-propylene rubber glue is mixed and sprayed into the first coagulation tank in liquid phase. The gas phase temperature of the first coagulation tank (i.e. operating temperature, the same below) is 75°C and the operating pressure is 0.06MPa. Among them, the bottom of the first condensation tank is heated by a mixed heat source containing a small amount of solvent oil and steam flowing out of the second condensation tank in gas phase, and at the same time, the so...

Embodiment 2

[0055] In this example, a three-pot coagulation process is used to illustrate the coagulation method of ethylene-propylene rubber glue.

[0056] This example adopts the method described in Example 1, the difference is that the volume ratio of circulating hot water to ethylene-propylene rubber glue is 1.7:1, the gas phase temperature of the first coagulation tank is 73°C, and the operating pressure is 0.05MPa. The ratio of the length to the inner diameter of the first coagulation tank is 1.1:1, and the conditions for condensation in the second coagulation tank include: the operating temperature is 101°C, the pressure is 0.06MPa, and the ratio of the length to the inner diameter of the second coagulation tank is 1.8:1 The conditions for coagulation in the third coagulation tank include: the operating temperature is 97°C, the pressure is 0.007MPa, and the ratio of the length to the inner diameter of the third coagulation tank is 1.5:1. The residence time of the ethylene-propylene...

Embodiment 3

[0059] In this example, a three-pot coagulation process is used to illustrate the coagulation method of ethylene-propylene rubber glue.

[0060] This example adopts the method described in Example 1, the difference is that the volume ratio of circulating hot water to ethylene-propylene rubber glue is 1.3:1, the gas phase temperature of the first condensation tank is 77°C, and the operating pressure is 0.08MPa. The ratio of the length to the inner diameter of the first coagulation tank is 1.3:1, and the coagulation conditions in the second coagulation tank include: the operating temperature is 105°C, the pressure is 0.12MPa, and the ratio of the length to the inner diameter of the second coagulation tank is 2:1 The conditions for coagulation in the third coagulation tank include: the operating temperature is 100°C, the pressure is 0.01MPa, and the ratio of the length to the inner diameter of the third coagulation tank is 2:1. The residence time of the ethylene-propylene rubber ...

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Abstract

The invention discloses a glue solution coacervation method of an ethylene propylene rubber. The method is characterized in that under condition of water existence, the glue solution of the ethylene propylene rubber enables coacervation in at least two coacervation kettles to obtain the ethylene propylene rubber colloidal particles; wherein, the coacervation condition in a first coacervation kettle is characterized in that an operation temperature is 70-85 DEG C, a pressure value is 0.05-0.10 MPa, and a volume ratio of water to the glue solution of the ethylene propylene rubber is 1.1-2:1. According to the method, under prerequisite that energy consumption is greatly reduced, the ethylene propylene rubber can be produced in a long period and in a stable mode, so that phenomena of uniform colloidal particles and no core sandwich of the ethylene propylene rubber formed in the coacervation kettle cannot be generated.

Description

technical field [0001] The invention relates to the technical field of polymer production, in particular to a method for agglomerating ethylene-propylene rubber glue. Background technique [0002] Ethylene-propylene rubber (EPR) is a synthetic rubber with excellent weather resistance, ozone resistance, heat aging resistance and electrical insulation. It is one of the seven general-purpose synthetic rubber varieties in the world. It can be divided into two categories: ethylene-propylene-diene rubber (EPM) and ethylene-propylene-diene rubber (EPDM). The former is an amorphous elastomer copolymerized with ethylene and propylene. The latter is a terpolymer composed of ethylene, propylene and a small amount of non-conjugated dienes (such as 5-ethylidene-2-norbornene ENB, dicyclopentadiene DCPD and 1,4 hexadiene HD). Since the main chain of the EPR molecule does not contain double bonds, it presents a high degree of chemical stability, known as "non-crack rubber", and has relativ...

Claims

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Application Information

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IPC IPC(8): C08F6/12C08F210/16C08J11/02
Inventor 李巍周淑芬李传清徐林赵英健
Owner CHINA PETROLEUM & CHEM CORP