METHODS FOR PRODUCING POLYCARBONATE COPOLYMER AND POLYSILOXANE COMPOUND, POLYCARBONATE COPOLYMER, POLYSILOXANE COMPOUND, COMPOSITION, AND MOLDED BODY

The present invention provides a method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1) to (1-4) and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst, where the polycarbonate copolymer comprises 0.001% by weight or more and 30% by weight or less of a low molecular weight compound having a weight average molecular weight of 1,000 or less. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound. (In the formulae, R1 to R10, R30 to R33, Z 1, Z2, J1, K1, A1, A2, L1, L2 and X are as described in the description of the present application.)