FIELD: chemistry.
SUBSTANCE: invention relates to a polycarbonate as substrate material for making transparent moulded articles. The polycarbonate is obtained through phosgenation of bisphenols at temperature 0-40°C and 5-17 mol % excess phosgene. The polycarbonate contains carbamate compounds of formula (1) 
, in which R1 and R2 denote hydrogen or C1-C12alkyl, or R1 and R2 - C4-C12 alkylidene or C4-C5 alkylidene, R3 and R4 denote hydrogen C1-C12 alkyl, mainly C1-C8 alkyl, phenyl, or R3 and R4, bonded to a carbon atom, together form cyclohexyl or trimethylcyclohexyl, R5 denotes hydrogen, C1-C12 alkyl, C5-C12 cycloalkyl, phenyl or cumyl.
EFFECT: invention enables to obtain polycarbonate with low content of carbamate compound impurities equal to 0,2-300 parts per million.
9 cl, 1 tbl, 8 ex
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