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Preparation method of maleic anhydride grafted chlorinated polyvinyl chloride composite material

A technology of chlorinated polyvinyl chloride and maleic anhydride is applied in the field of preparing maleic anhydride grafted chlorinated polyvinyl chloride MAH-g-CPVC composite materials, which can solve the problem of poor impact resistance, high product brittleness, and CPVC material limitations, etc. problems, to achieve the effect of wide application prospects and high product brittleness

Active Publication Date: 2015-04-29
HARBIN ZHONGDA PROFILE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melting temperature of CPVC resin is close to or exceeds its thermal decomposition temperature, and it is easy to cause overheating and decomposition in the process of forming products, which makes the processing difficult, and the products are brittle and have poor impact resistance, which makes the application of chlorinated polyvinyl chloride CPVC materials restricted. big limit

Method used

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  • Preparation method of maleic anhydride grafted chlorinated polyvinyl chloride composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Maleic anhydride MAH was grafted onto the molecular chain of chlorinated polyvinyl chloride CPVC by melting method.

[0015] The basic formula for preparing maleic anhydride grafted chlorinated polyvinyl chloride MAH-g-CPVC composite material by melting method: 100 parts by weight of chlorinated polyvinyl chloride CPVC resin, 5-15 parts of maleic anhydride MAH, organic peroxide 0.2-5 parts.

[0016] The uniformly chlorinated chlorinated polyvinyl chloride CPVC resin, maleic anhydride MAH and organic peroxide as the initiator are mixed uniformly by a mixer, heated and melted by the extruder, extruded and granulated, and the grafting rate is controlled at 2-4%, the heating temperature of the extruder is 100-170°C, the screw speed of the extruder is 30-40 rpm, and the preparation of the MAH-g-CPVC composite material is completed.

Embodiment 2

[0018] Chlorinated polyvinyl chloride CPVC resin is produced by suspension method. It is required to choose a loose PVC resin with thin film, large surface area and regular structure for chlorination. Its main feature is segmental chlorination, which uses controllable segmental reaction temperature and pressure to control the diffusion rate of chlorine gas in PVC resin. The content is controlled at 63-72% to obtain uniformly chlorinated chlorinated polyvinyl chloride CPVC resin.

[0019] A kind of maleic anhydride grafted chlorinated polyvinyl chloride MAH-g-CPVC composite material of the present invention and preparation method thereof have been introduced in detail above, applied specific example in this explanation text and explained the principle of the present invention and implementation mode, The descriptions of the above embodiments are only used to help understand the method and core idea of ​​the present invention. For those skilled in the art, according to the idea...

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Abstract

The invention relates to a modified technique of chlorinated polyvinyl chloride (CPVC) composite material, in particular to a preparation method for producing maleic anhydride grafted chlorinated polyvinyl chloride (MAH-g-CPVC) composite material by adopting a melting method to graft the maleic anhydride (MAH) onto a CPVC molecular link. The thermal decomposition temperature is 15 to 20 DEG C higher than that of ordinary CPVC resin, so that a melting processing temperature condition is satisfied, the Vicat softening temperature of the material can reach 125 to 135 DEG C, the maximal application temperature can reach 120 DEG C, and the long-term application temperature of the material is 105 DEG C. The defects that the melting temperature of the CPVC is close to or exceeds the thermal decomposition temperature, the overheating decomposition is likely to occur in the process for machining and forming a product, the machining difficulty is large, the fragileness of the product is large, and the impact resistance is poor can be overcome, so that the application prospect of the CPVC is wider.

Description

technical field [0001] The invention relates to a modification technology of a chlorinated polyvinyl chloride CPVC composite material, in particular to a method for preparing a maleic anhydride grafted chlorinated polyvinyl chloride MAH-g-CPVC composite material by a melting method. Background technique [0002] Chlorinated polyvinyl chloride CPVC plastic has excellent physical and chemical properties such as heat resistance, weather resistance, chemical medium corrosion resistance, colorless, tasteless, odorless and flame retardant and self-extinguishing properties. It is a novel plastic with rapid development in the application field in recent years. material with great market potential. Chlorinated polyvinyl chloride CPVC material can be made into pipes, profiles, plates, rods and other products through molding and processing, and is mainly used in chemical industry, electrical industry, interior decoration industry, petroleum industry, construction industry and other fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/00C08F259/04C08F222/06C08F114/06C08F8/22B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 胡大忠张文龙冯伟刚戴亚杰韩克伟胡淼
Owner HARBIN ZHONGDA PROFILE TECH