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Method for producing chlorinated polypropylene with mixed solvent

A chlorinated polypropylene and mixed solvent technology, applied in the field of chlorinated polypropylene production, can solve the problems of high sealing requirements, poor safety, low output of chlorinated polypropylene, etc., and achieves low sealing strength requirements and high production safety. , The effect of reducing equipment investment

Active Publication Date: 2010-09-15
LUZHOU NORTH PLASTIC CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the application number is 200710048407.1, and the single solvent used in "The Production Method of Chlorinated Polypropylene" is chloroform, and the chlorinated polypropylene produced by the solvent of chloroform as the carrier is of good quality and can solve the problem of using carbon tetrachloride. The problem of environmental pollution caused when used as a solvent, but the chlorinated polypropylene produced by the solvent with chloroform as the carrier still has the following problems: first, the solubility of chloroform to dissolve polypropylene is low, and such low solubility leads to The output of chlorinated polypropylene produced is low, and in order to improve the solubility of chloroform-dissolved polypropylene, the reaction temperature is usually increased, which leads to an increase in the requirements for reaction conditions
Secondly, in the reaction kettle, the dissolution pressure strength of chloroform dissolved polypropylene is 0.2Mpa ~ 0.6Mpa, this pressure strength leads to high requirements on the sealing of the reaction kettle during the production process, and the safety of this production method is poor

Method used

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  • Method for producing chlorinated polypropylene with mixed solvent
  • Method for producing chlorinated polypropylene with mixed solvent
  • Method for producing chlorinated polypropylene with mixed solvent

Examples

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Embodiment 1

[0027] According to the method steps provided by the production method of the present invention, 6000Kg of mixed solvent containing 20% ​​ethyl acetate and 80% chloroform is added to the reaction kettle, and then 400Kg of polypropylene is added and stirred to raise the temperature to 95°C-100°C, and the pressure strength is 0.15 Under Mpa~0.16Mpa, dissolve for 4 hours. After the dissolution is complete, add 500g of initiator azobisisobutyronitrile to the reaction pot for the first time, and then pass chlorine gas to carry out chlorination reaction; after reacting for 3 hours, stop the chlorine flow and cool down to 90°C±5°C; add 150g of initiator azobisisobutyronitrile to the reaction pot for the second time, and then continue to pass chlorine gas for chlorination reaction; after continuing the reaction for 3 hours, stop the chlorine flow and cool down to 80°C±5 ℃; add an appropriate amount of initiator azobisisobutyronitrile 100g to the reaction pot for the third time, and the...

Embodiment 2

[0029] Add 6000Kg of a mixed solvent containing 5% ethyl acetate and 95% chloroform into the reaction kettle, then add 400Kg of polypropylene, drive and stir to raise the temperature to 100°C-110°C, under the pressure of 0.18Mpa-0.19Mpa, dissolve for 4 hours, After the dissolution is complete, add 500g of initiator azobisisobutyronitrile to the reaction pot for the first time, and then pass chlorine gas for chlorination reaction; after 3 hours of reaction, stop the chlorine flow and cool down to 90°C±5°C; Add an appropriate amount of initiator azobisisobutyronitrile 150g for the second time, and then continue to pass chlorine gas for chlorination reaction; after continuing the reaction for 3 hours, stop the chlorine flow, and lower the temperature to 80°C±5°C; add to the reaction pot for the third time Appropriate amount of initiator azobisisobutyronitrile 100g, and then continue to pass in chlorine gas for chlorination reaction; Concentrate under negative pressure at ℃ to obt...

Embodiment 3

[0031] Add 6000Kg of mixed solvent containing 10% butyl acetate and 90% chloroform into the reaction kettle, then add 400Kg of polypropylene, drive and stir to raise the temperature to 100°C-110°C, under the pressure of 0.16Mpa-0.17Mpa, dissolve for 4 hours, After the dissolution is complete, add an appropriate amount of initiator azobisisobutyronitrile 500g to the reaction pot for the first time, and then pass chlorine gas to carry out the chlorination reaction; Add 150g of initiator azobisisobutyronitrile to the pot for the second time, and then continue to pass chlorine gas for chlorination reaction; after continuing the reaction for 3 hours, stop the chlorine flow, and lower the temperature to 80°C±5°C; add to the reaction pot for the third time 100g of initiator azobisisobutyronitrile, and then continue to pass in chlorine gas for chlorination reaction; after the chlorination reaction, pass in nitrogen gas to replace and absorb the unreacted chlorine gas, and then under ne...

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Abstract

The invention discloses a method for producing chlorinated polypropylene with a mixed solvent. The method comprises the following steps of: dissolving polypropylene in a mixed solvent of ethyl acetate and methenyl chloride or butyl acetate and methenyl chloride; then, adding chlorine to carry out a chlorination reaction; and displacing, drying and granulating the chlorinated solution to obtain a chlorinated polypropylene product. When the chlorinated polypropylene is produced by adopting the mixed solvent of the ethyl acetate and the methenyl chloride or the butyl acetate and the methenyl chloride, the mixed solvent has stronger dissolubility to the polypropylen, lower dissolubility pressure strength, higher production safety, lower requirement for the sealing strength of a reaction kettle and lower equipment investment.

Description

technical field [0001] The invention relates to a method for producing chlorinated polypropylene, in particular to a method for producing chlorinated polypropylene with a mixed solvent. Background technique [0002] Chlorinated polypropylene (CPP for short) is one of the important chemically modified products of polypropylene (PP). The appearance is white or light yellow solid, non-toxic and tasteless. The melting point varies with the chlorine content, generally between 100 and 120 °C. between. Insoluble in alcohols and aliphatic hydrocarbons, soluble in aromatics, esters and ketones, has good oil resistance, heat resistance, acid resistance, alkali resistance and ultraviolet radiation resistance. According to the degree of chlorination, chlorinated polypropylene can usually be divided into two categories: high-chlorinated polypropylene and low-chlorinated polypropylene. The chlorination degree of high-chlorinated polypropylene can be as high as 63% to 67%; the chlorinati...

Claims

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Application Information

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IPC IPC(8): C08F10/06C08F8/22
Inventor 何勇秦建超吕升杏肖珍云
Owner LUZHOU NORTH PLASTIC CHEM
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