A kind of synthetic method of highly transparent polysulfone resin containing cycloalkane group substituted phenol

Abstract

The invention discloses a method for synthesizing a highly transparent polysulfone resin (PSU) containing cycloalkane-based substituted phenols, using 4,4'-dichlorodiphenyl sulfone and bisphenol A at a molar ratio of 1:1 as the reaction unit. In a nitrogen-protected reaction kettle, add an organic solvent and stir to raise the temperature, then add the reaction monomers in sequence, after the monomers are completely dissolved, add a salt-forming agent and a water-separating agent, stir and heat up, and react for 1 to 2 hours to form a salt; After the reaction is completed, the temperature is raised, and then 0.1-5% of cycloalkane-substituted phenol is added, and the constant temperature polymerization is carried out for 4-5 hours to obtain polymerized slime; the polymerized slime is cooled, pulverized, washed and dried to obtain the finished product. The invention starts from the molecular structure level, introduces cycloalkane group to replace phenol in the polymer molecular chain, destroys the regularity of the polymer chain, reduces the crystallinity, and prepares the highly transparent polysulfone resin terminated by the hydroxyl group. The product synthesized by this invention not only retains the original excellent performance of polysulfone, but also has the advantages of high light transmittance, and has better application prospects and great market value.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an industrial synthesis method of highly transparent polysulfone resin containing cycloalkane group-substituted phenol. Background technique [0002] Polysulfone (PSU) is a thermoplastic engineering plastic with excellent mechanical properties, high rigidity, wear resistance, high strength, high thermal stability, high glass transition temperature, and maintains excellent mechanical properties even at high temperatures. And hydrolysis resistance, good dimensional stability, small molding shrinkage, non-toxic, radiation resistance, flame resistance, self-extinguishing, excellent electrical properties in a wide temperature range, good chemical stability, and can withstand general acids, alkalis, Salt, so it has been widely used in the fields of electronic appliances, mechanical processing, automobiles, medical appliances, food processing and non-stick coatings...

AI Technical Summary

Problems solved by technology

However, due to the defects of the existing technology and its own synthesis route, if the production process is not well controlled, polysulfone resin with high crystallinity will appear, which will lead to problems such as low transmittance and uneven color in the thin products processed and formed later. , the finished product rate of processing is greatly reduced, and the product performance is reduced, thus affecting its actual promotion and application

[0003] Chinese patent document CN1057783C discloses a polysulfone composition with very low luster and high light transmittance and products manufactured therefrom. This invention is by adding organic phosphorus stabilizer and organic fluorescent whitening agent to polysulfone products, Although the yellowness index and haze of the obtained product are very low, the polysulfone product itself is sensitive to additives, and problems such as aging and cracking will occur during long-term use

At present, there are many studies on the modification and enhancement of plastics by using various additives, but there are few studies on improving the transparency of polysulfone plastics from the formulation.

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