| abstract |
FIELD: chemistry. n SUBSTANCE: invention relates to a method of producing polysulphones with low yellow index according to DIN 6167 which is less than 19, and polyethersulphones with yellowness index according to DIN 6167 which is less than 30. Polymerisation takes place in aprotic solvents with a basic character using a forced-action mixer with wall-adjacent motion, having ratio d/D>0.9. n EFFECT: method reduces yellowness index and turbidity of a polymer and increase its light transmission. n 7 cl, 8 ex, 2 tbl |