A polysulfone resin, its preparation and use

By controlling the molecular weight distribution and polymerization process of polysulfone resin, the problems of insufficient solution stability and heat resistance of polysulfone resin have been solved, enabling high-performance polysulfone resin to be applied in water treatment and hemodialysis.

CN119264431BActive Publication Date: 2026-07-10WANHUA CHEM GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WANHUA CHEM GRP CO LTD
Filing Date
2024-11-07
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing polysulfone resins have shortcomings in terms of solution stability and heat resistance, especially the instability of the solution and uneven processing caused by the high content of cyclic dimers.

Method used

Polysulfone resin was prepared by nucleophilic substitution using para-dihalogen diphenyl sulfone compounds and bisphenol A compounds as raw materials. The molecular weight distribution was controlled by adjusting the type and addition method of inorganic salt catalysts, reducing the content of ultra-high molecular weight and ultra-low molecular weight, and optimizing the polymerization process to improve solution stability and heat resistance.

Benefits of technology

The prepared polysulfone resin has excellent heat resistance, yellowing resistance and degradation resistance, and good stability in organic solutions, making it suitable for water treatment and hemodialysis.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a polysulfone resin, its preparation method, and its application. The molecular weight of the polysulfone resin is determined by gel permeation chromatography with polymethyl methacrylate as the conversion base. Let A be the logarithm of molecular weight M, log(M), and B be the concentration fraction C, dC / dlog(M) obtained by differentiating the logarithm of molecular weight, log(M). In the molecular weight distribution curve with A as the abscissa and B as the ordinate, (1) the value of B reaches its maximum in the range of 4.5 ≤ A ≤ 5.5. (2) In the molecular weight distribution curve, the value obtained by integrating the value of B in the range of A ≤ A-0.8 and A≥A+0.3 is 3%-10% relative to the value obtained by integrating the value of B over the entire range of A. The polysulfone resin of this invention has excellent heat resistance and yellowing resistance. In addition, the polysulfone solution containing the polysulfone resin of this invention has excellent stability and low color number.
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