Flexible temperature-resistant PBO polymer and preparation process thereof
By using specific combinations of aromatic dicarboxylic acid monomers in the polymerization process of PBO polymers, the flexibility and processing performance of the polymer are improved, and the problem of insufficient applicability of existing PBO polymers in the fields of apparel and industrial nonwovens is solved, and PBO polymers with higher flexibility and temperature resistance are achieved.
CN119684604APending Publication Date: 2025-03-25CHINA BLUESTAR CHENGRAND CO LTD +1
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Patent Information
- Application Number
- CN202311240258.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-25
- Publication Date
- 2025-03-25
AI Technical Summary
Technical Problem
The existing PBO polymers have shortcomings in processability, flexibility and temperature resistance, and are difficult to be suitable for clothing and industrial nonwovens.
Method used
By adaptively selecting and compounding aromatic dicarboxylic acid monomers in the polymerization process, the flexibility and processing performance of PBO polymers are improved, and flexible temperature-resistant PBO polymers are prepared that are more suitable for the field of clothing and industrial nonwovens.
Benefits of technology
It achieves lower raw hydrodynamic viscosity, higher flexibility and processing properties of PBO polymers, and is suitable for clothing and industrial non-wovens, while maintaining excellent temperature resistance.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a flexible temperature-resistant PBO polymer and a preparation process thereof.The preparation process comprises the steps that polyphosphoric acid is heated and then fed into a degassing kettle, 4, 6-diamino resorcinol hydrochloride, aromatic dicarboxylic acid and phosphorus pentoxide are added into the degassing kettle, degassing is conducted in the degassing kettle, prepolymerization and defoaming are conducted after degassing is completed, and a prepolymer material is obtained; the preparation method comprises the following steps: preparing a pre-polymer material, pressing the pre-polymer material into a screw extruder through a hydraulic machine, carrying out post-polymerization reaction on the pre-polymer material in the screw extruder, filtering through a filter, defoaming to obtain a post-polymer material, extruding the post-polymer material from a mold, and washing with water to obtain the flexible temperature-resistant PBO polymer. The PBO polymer prepared by the invention has temperature resistance similar to that of para-position PBO, but has lower requirements on preparation conditions, higher solubility in a polyphosphoric acid system and better processability of a polymerization stock solution, and the PBO polymer has the potential of being used for preparing low-cost ultrahigh-temperature-resistant paper or clothing fibers.
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