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A kind of preparation method of high rigidity chlorinated polyethylene resin

A technology of chlorinated polyethylene and polyethylene resin, which is applied in the field of chlorinated polyethylene materials, can solve problems such as complex operation, and achieve the effects of low reaction temperature, excellent product quality, and reduced energy consumption

Active Publication Date: 2017-12-19
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is complicated to operate, and needs to go through the preparation of the suspension solution, the introduction of chlorine gas in two stages, and the separation, washing, dehydration and drying of chlorinated products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation technology of embodiment 1,2 is:

[0023] a. Ingredients: put polyethylene resin powder, antistatic agent and initiator into the reaction kettle, wherein the amount of antistatic agent added is 0.1% of the weight of polyethylene resin powder, and the amount of initiator added is polyethylene resin powder Add 0.1% of the mass;

[0024] b. Pre-chlorination: the reaction kettle loaded with materials is heated up under a high-speed stirring state of 800 rpm, and when the temperature rises to 60 ° C, the mixed gas of chlorine and nitrogen is introduced, and the volume content of chlorine is 20%;

[0025] c. Chlorination: Keep the reaction kettle warming up while feeding the mixed gas. When the reaction temperature rises to 100°C, adjust the volume content of chlorine in the mixed gas of chlorine and nitrogen to 15%, and keep the reaction temperature at 100°C to chlorine The chemical reaction ends;

[0026] d. Backflush: stop the mixed gas of chlorine and ni...

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Abstract

The invention discloses a preparation method of a high-rigidity chlorinated polyethylene resin, which belongs to the technical field of chlorinated polyethylene materials. It is characterized in that: gas phase polyethylene resin powder is selected, the density is 0.930~0.950 g / cm3, the MFR is 0.5~2 g / 10min, the specific pore volume is 0.1~0.2mL / g, the specific surface area is 20~30m2 / g; In the chemical reaction, a mixture of chlorine and nitrogen with a volume content of 19.5-2.5% of chlorine gas is first introduced at 60°C, and then when the temperature rises to 100°C, the chlorine gas content is adjusted to 14.5-15.5%, and the reaction temperature is kept at 100°C for reaction 1 ~1.5h; Chlorinated polyethylene was obtained after backflushing. The invention has low difficulty in operation and control, and the prepared chlorinated polyethylene product has good hardness and toughness. As an impact modifier for rigid PVC, it avoids loss of rigidity of the material while toughening.

Description

technical field [0001] The invention discloses a preparation method of a high-rigidity chlorinated polyethylene resin, which belongs to the technical field of chlorinated polyethylene materials. Background technique [0002] Chlorinated polyethylene is a polymer elastic material between rubber and plastic. It can be easily mixed with polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins. It is usually used as a link between plastic and rubber. Modifiers and additives, plastic products modified by CPE will greatly improve impact strength and low temperature toughness, and at the same time chemical resistance and flame retardancy will also be improved accordingly, and they will not age for a long time when used at high temperatures, so in It is widely used in industrial fields such as plastic doors and windows, PVC pipes and plates, waterproof coils, anti-corrosion coatings, wires and cables, magnetic materials, flame-retardant hoses, tapes, and ABS mod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F8/22
Inventor 唐岩谢侃刘少成
Owner CHINA PETROLEUM & CHEM CORP
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