A kind of sulfone polymer composition and preparation method thereof and the thermoplastic composition being made from it

The invention discloses a kind of sulfone polymer composition and preparation method thereof and the thermoplastic composition that is made from it, comprising：（A）At least one aromatic sulfone polymer；(B) a kind of dichloro diphenyl sulfone of compound 4,4 '；Wherein, the gross weight based on sulfone polymer composition, the weight content of 4,4 ' dichloro diphenyl sulfones are less than 600ppm.Its preparation method is using sulfolane as solvent, and with 4,4 ' dichloro diphenyl sulfones and 4,4 ' dihydroxydiphenylsulisomers or 4,4 ' dihydroxybiphenyls are reaction monomers, using the salt-mixture of sodium carbonate and potassium carbonate as salt forming agent, polymerize producing using solution polymerization technique；Wherein, the mol ratio of the potassium carbonate and sodium carbonate is 0.1：100‑5：100.The light transmittance of the sulfone polymer composition of the present invention is more than 85%, and mist degree is less than 4%, and yellowness index is less than 5, has the transparency and color level significantly improved.