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A method for preparing oil-extended chlorosulfonated polyethylene by gas-solid phase reaction

The technology of chlorosulfonated polyethylene and chlorinated polyethylene is applied in the field of preparation of chlorosulfonated polyethylene, which can solve the problems of difficult production of low Mooney viscosity CPE, low tensile strength and high production cost, and achieve high product performance. , uniform distribution, the effect of reducing production costs

Active Publication Date: 2017-11-28
杭州新元化工技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the above-mentioned problems in the prior art, the present invention aims to provide a method for preparing oil-extended chlorosulfonated polyethylene by gas-solid phase reaction, in order to solve the problem of the low cost of main raw materials in the existing gas-solid phase method for producing CSM. It is difficult to produce CPE with viscosity, CSM products have low tensile strength and high production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing oil-extended chlorosulfonated polyethylene by gas-solid phase reaction, using gas-solid phase reaction in a three-layer stirred fixed-bed reactor to prepare oil-extended CSM, comprising the following steps:

[0031] (1) Choose the chlorinated polyethylene powder of Mooney viscosity ML100 ℃ 1+4 124, moisture content 0.35wt%, chlorine content 32.3wt%, cross 30 mesh sieves, get 10.0Kg, add precipitated white carbon black 0.1Kg and 0.3Kg of ultrafine talc powder, mixed evenly, placed in a 100L glass-lined, three-layer fixed-bed reactor with stirring paddles (the bottom of the stirrer is a ribbon-type paddle, and the upper two layers are blade-type paddles).

[0032] (2) Feed sulfur dioxide gas into a 1000L steel pressure vessel with a pressure resistance of 0.6MPa until the pressure is 0.25MPa, then feed chlorine gas to raise the pressure to 0.55MPa, and the resulting mixed gas is ready for use.

[0033] (3) Vacuumize the reactor to a pressure of -0.0...

Embodiment 2

[0041] A method for preparing oil-extended chlorosulfonated polyethylene by gas-solid phase reaction, using gas-solid phase reaction in a three-layer stirred fixed-bed reactor to prepare oil-extended CSM, comprising the following steps:

[0042] (1) choose the chlorinated polyethylene powder of Mooney viscosity ML100 ℃ 1+4 127, moisture content 0.5wt% and chlorine content 23.5wt%, cross 20 mesh sieves, get 10.0Kg, add precipitated white carbon black 0.1Kg and Superfine talc powder 0.2Kg, mixed evenly, placed in a 100L steel-lined fluoroplastic, three-layer fixed-bed reactor with stirring paddles (the bottom of the stirrer is a ribbon-type paddle, and the upper two layers are blade-type paddles).

[0043] (2) Feed sulfur dioxide gas into a steel 1000L pressure vessel with a pressure resistance of 0.6MPa until the pressure is 0.25MPa, then feed chlorine gas to raise the pressure to 0.5MPa, and the resulting mixed gas is ready for use.

[0044] (3) Turn on the reactor to stir, ev...

Embodiment 3

[0052] A method for preparing oil-extended chlorosulfonated polyethylene by gas-solid phase reaction, using gas-solid phase reaction in a three-layer stirred fixed-bed reactor to prepare oil-extended CSM, comprising the following steps:

[0053] (1) Select chlorinated polyethylene powder with Mooney viscosity ML100°C 1+4 122, chlorine content 33wt% and moisture content 0.3wt%, pass through a 30-mesh sieve, take 125Kg, add precipitated white carbon black 2.5Kg and superfine Talc powder 7.5Kg, uniformly mixed, placed in a 500L three-layer stirring paddle glass-lined reactor (the bottom of the stirrer is a ribbon-type stirring paddle, and the upper two layers are blade-type paddles).

[0054] (2) Feed sulfur dioxide gas into a steel 1000L pressure vessel with a pressure resistance of 0.6MPa to raise the pressure to 0.25MPa, then feed chlorine gas to raise the pressure to 0.55MPa, and the resulting mixed gas is ready for use.

[0055] (3) Turn on the reactor to stir, evacuate the ...

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Abstract

The invention belongs to the field of preparation of CSM (chlorosulfonated polyethylene), and particularly relates to a method for preparing oil-extended CSM through a gas-solid reaction. The method comprises steps as follows: high-Mooney-viscosity CPE (chlorinated polyethylene) powder and an anti-bonding agent are added to a reactor, stirring is started, the inside of the reactor is vacuumized, the reactor is filled with hot nitrogen and then decompressed, the process is repeated for multiple times, an ultraviolet lamp is turned on for irradiation, chlorine and sulfur dioxide mixed gas is fed into the reactor, a reaction product is transferred to purified water to be washed repeatedly until the pH of the washing water is higher than 6 after the reaction, then a material is dehydrated and dried, high-Mooney-viscosity CSM powder is obtained, the high-Mooney-viscosity CSM powder and rubber processing oil are put into a high-speed stirrer in proportion, a stabilizer is heated, mixing and forming are performed by the aid of conventional rubber mixing and forming equipment, and the oil-extended CSM product is obtained. With the adoption of the method, problems that a main raw material, namely, low-Mooney-viscosity CPE, is difficult to produce, the CSM product is not high in tensile strength, the production cost is high and the like in the process for producing the CSM with an existing gas-solid method can be solved.

Description

technical field [0001] The invention belongs to the field of preparation of chlorosulfonated polyethylene, and in particular relates to a method for preparing oil-extended chlorosulfonated polyethylene by gas-solid phase reaction. Background technique [0002] Chlorosulfonated polyethylene (hereinafter referred to as CSM) is a special synthetic rubber obtained by chlorination and chlorosulfonation of polyethylene. Due to the saturation of the structure and the presence of chlorosulfonyl groups, it has good crosslinkability, and the weather resistance, ozone resistance, oil resistance, chemical resistance, abrasion resistance, radiation resistance and flame retardancy of the vulcanized rubber It is widely used in automotive rubber parts, flame retardant wires and cables, roof waterproofing and rubber dams, chemical equipment anti-corrosion linings, shoemaking and coatings and other fields. [0003] The production methods of chlorosulfonated polyethylene include solvent metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/34C08L91/06C08K13/02C08K5/12C08K5/1515C08K5/098C08F10/02C08F8/38C08K3/36C08K3/34C08K3/22
CPCC08F8/38C08K3/34C08K3/36C08K5/098C08K5/12C08K13/02C08L23/34C08L91/00C08F110/02
Inventor 白杰
Owner 杭州新元化工技术开发有限公司
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