Method for preparing solid phase of chlorinated polypropylene or chlorinated maleic anhydride inoculated polypropylene

A technology of chlorinated polypropylene and grafted polypropylene is applied in the field of solid-phase preparation of chlorinated polypropylene and chlorinated maleic anhydride grafted polypropylene, which can solve the problem of uneven reaction, easy coking of products and adhesion and grafting. problems such as low branch rate, to achieve the effect of improving the uniformity of chlorination, low production cost and controllable chlorine content

Inactive Publication Date: 2009-10-14
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low reaction temperature (below 100°C) and the use of ball milling technology, it overcomes the problems of uneven reaction, easy coking and bonding of the product, and low grafting rate in the traditional solid-phase method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 100 parts by weight of polypropylene particles into a reaction kettle with a stirring device, heat up to 70°C under stirring, feed chlorine gas into the reaction kettle for 6 hours, drive away the chlorine gas in the reaction kettle with clean air, and transfer the material to a ball mill Crumble for 0.5h; then add the crushed powder and 1 weight part of azobisisobutyronitrile into the reactor, heat up to 70°C under stirring, and pass in chlorine gas for secondary chlorination. After 2 hours of reaction, stop Heating, using clean air to drive away the chlorine in the kettle, the chlorination product is washed with water to neutralize the acid, and after drying, chlorinated polypropylene with a chlorine content of 23.47% by weight can be obtained.

Embodiment 2

[0020] Add 100 parts by weight of polypropylene particles and 1 part by weight of azobisisobutyronitrile into a reaction kettle with a stirring device. Heat up to 80°C under stirring, and react with chlorine gas for 4 hours, drive away the chlorine gas in the reactor with clean air, transfer the material to a ball mill for crushing for 0.5 hour, and then crush the crushed powder, azobisisobutyronitrile Add 1 part by weight into the reaction kettle, heat up to 80°C under stirring, pass in chlorine gas for secondary chlorination, stop heating after 4 hours of reaction, drive away the chlorine gas in the kettle with clean air, and wash the chlorinated product with water After deacidification to neutrality, chlorinated polypropylene with a chlorine content of 28.48% by weight can be obtained after drying.

Embodiment 3

[0022] Add 100 parts by weight of polypropylene particles and 1 part by weight of azobisisobutyronitrile into a reaction kettle with a stirring device. Heat up to 90°C under stirring, and react with chlorine gas for 2 hours, drive away the chlorine gas in the reaction kettle with clean air, and transfer the material to a ball mill for crushing for 0.5 hour. Then add the crushed powder and 1 part by weight of azobisisobutyronitrile into the reaction kettle, heat up to 90° C. under stirring, and pass in chlorine gas for secondary chlorination. After reacting for 5 hours, the heating was stopped, and the chlorine gas in the kettle was driven away with clean air, and the chlorinated product was washed with water to neutralize the acid, and after drying, chlorinated polypropylene with a chlorine content of 30.33% by weight was obtained.

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PUM

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Abstract

The invention discloses a method for preparing the solid phase of chlorinated polypropylene or chlorinated maleic anhydride inoculated polypropylene. In the invention, 100 weight parts of polypropylene or maleic anhydride inoculated polypropylene and 0.5-3 weight parts of an evocating agent are mixed, heated to 50-100 DEG C and chlorinated by introducing chlorine gas, heating is stopped, residual chlorine gas is dispersed by air, the chlorinated product is deacidified by de-ionized water or distilled water, and drying to obtain the chlorinated polypropylene or chlorinated maleic anhydride inoculated polypropylene. The method adopts a lower temperature and introduces ball milling technology, thus overcoming the defects of non-uniform reaction, easy coking and bonding for product, relatively low modification efficiency existing in the traditional modified polypropylene solid phase preparation method. The inventive technology has the advantages of simple process, no need of solvent, low cost and the like, the prepared modified polypropylene product can not change color, is high in inoculation rate, can be widely used in the fields of paint, printing ink, adhesive, compatibilizer and the like.

Description

technical field [0001] The invention belongs to the field of macromolecule chemical industry, and in particular relates to a solid phase preparation method of chlorinated polypropylene and chlorinated maleic anhydride grafted polypropylene. Background technique [0002] Polypropylene is a widely used thermoplastic general-purpose plastic. Due to its non-polarity, it leads to low surface tension, poor compatibility and adhesion with polar materials, and difficulty in dyeing, etc., which limits its application. Therefore, it is of great significance to polarize polypropylene. [0003] At present, chlorinated polypropylene (CPP) has been industrialized and has been widely used in coatings, inks, adhesives, compatibilizers and other fields. The synthetic method of chlorinated polypropylene mainly includes three kinds of solvent method, aqueous phase method, solid phase method, wherein the CPP prepared by solvent method is more uniform in chlorination, and the reaction is easier...

Claims

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Application Information

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IPC IPC(8): C08F110/06C08F8/22C08F255/02
Inventor 容敏智李华亮章明秋
Owner SUN YAT SEN UNIV
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