A kind of sulfone polymer composition and its preparation method and thermoplastic molding composition composed of it

Abstract

A sulfone polymer composition and preparation method thereof, and thermoplastic molding composition therefrom, comprising: (A) at least one aromatic sulfone polymer; (B) one compound of 4,4′-dichlorodiphenyl sulfone; wherein, based on the total weight of the sulfone polymer composition, 4,4′-dichlorodiphenyl sulfone weight content is less than 600 ppm. In the preparation method, tetramethylene sulfone is used as a solvent, 4,4′-dichlorodiphenyl sulfone and 4,4′-Dihydroxydiphenyl sulfone or 4,4′-dihydroxy biphenyl are used as reactive monomers, while the mixed salt of sodium carbonate and potassium carbonate is used as salt-forming agent, the composition may be obtained by polymerization with solution polymerization techniques; wherein the molar ratio of the said potassium carbonate and sodium carbonate is 0.1: 100-5: 100. The sulfone polymer composition has a transmittance greater than 85%, a haze less than 4%, and a yellowness index less than 5, enjoying a significantly improved transparency and color levels.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a sulfone polymer composition, a preparation method thereof and a thermoplastic molding composition composed of the same. Background technique [0002] Sulfone polymer is a special high-temperature-resistant transparent thermoplastic engineering plastic with outstanding thermal properties, excellent chemical resistance, excellent high-temperature creep resistance, excellent dimensional stability, extremely low smoke and toxic gas emissions, and superior heat resistance Water and superheated steam, good electrical properties, mainly including three types of polysulfone PSU, polyethersulfone PES and polyphenylsulfone PPSU. It has been developed for more than 50 years since its development in the 1970s. As the development of sulfone polymer materials is becoming more and more perfect, its application range is becoming wider and wider. Now it is used in food hygiene, medica...

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Problems solved by technology

[0003] Patent US6593445 discloses that the method for improving the color of polyarylethersulfone is by controlling the single salt-forming agent K 2 CO 3 The particle size is in the range of 10-100 μm, and a light-colored polyarylethersulfone product is obtained, but its addition amount and the effect of different salt-forming agents and mixed salt-forming agents on the color have not been clearly announced

The method for producing PPSU published in patent EP2010061924, using K 2 CO 3 Make a salt agent, add an aqueous solution of alkali metal hydroxide to control the content of chlorine at the polymer end group at the later stage of polymerization, and obtain PPSU with a lower chlorine content, and the color is lighter, but the effect of different salt-forming agents on the completeness of the reaction and residual Effect of Monomer Content on Color and Transparency

US4176222 announced the method and reactivity of mixed salts for preparing sulfone polymers, that is, adding 0.1 to 20 moles of cesium salt or 0.05 to 10 moles of potassium salt per 100 moles of sodium salt. The patent uses mixed salts to increase the reaction rate To obtain high molecular weight polymers, the higher the reactivity, the easier it is to form a gel, and it does not involve the question of whether the reaction is complete or not and the influence of residual monomer content on color and transparency

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