High porosity chlorinated polyethylene special resin and method for preparing the same

CN122103670APending Publication Date: 2026-05-29WEIFANG YAXING CHEM CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WEIFANG YAXING CHEM CO LTD
Filing Date
2026-04-13
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In the prior art, the low pore volume of polyethylene resin leads to a slow chlorination reaction rate and poor uniformity, which affects the performance stability of chlorinated polyethylene products. Furthermore, existing improvement methods are costly or have complex processes.

Method used

By evacuating the sealed device and then introducing an inert gas, the expansion of the gas increases the pore size of the polyethylene resin. Subsequently, the resin is cured at low temperature and low pressure to form a high-porosity resin, thereby improving the permeability and uniformity of the chlorination reaction.

Benefits of technology

It significantly improves the chlorination reaction rate and uniformity, enhances the performance and production efficiency of chlorinated polyethylene products, and reduces costs and environmental risks.

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Abstract

The application belongs to the technical field of polymer materials, and particularly discloses a high-pore-volume special resin for chlorinated polyethylene and a preparation method thereof, which comprises the following steps: S1, powder polyethylene resin is put into a first stirring kettle, vacuum is drawn to a predetermined vacuum degree, constant pressure is kept, and oxygen in the first stirring kettle and the pores of the polyethylene resin is discharged; S2, inert gas is introduced into the first stirring kettle to a predetermined pressure, the inert gas is allowed to permeate into the pores of the polyethylene resin, and the temperature is raised to a predetermined temperature; as the temperature rises, the polyethylene resin gradually softens; S3, the softened polyethylene resin filled with inert gas is transported to a low-temperature and low-pressure second stirring kettle, under the action of pressure difference, the inert gas in the pores of the polyethylene resin instantaneously expands and releases, the pores of the softened resin are enlarged by the gas expansion effect, and as the polyethylene resin is in a low-temperature environment, the polyethylene resin solidifies, the resin pores no longer shrink, and thus the high-pore-volume special resin for chlorinated polyethylene is obtained.
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