Methods for producing polycarbonate copolymer and polysiloxane compound, polycarbonate copolymer, polysiloxane compound, composition, and molded body

A polycarbonate copolymer having a siloxane constituent unit represented by any one of the following formula (1-1) to formula (1-4) and a polycarbonate constituent unit represented by any one of the following formula (3-1) to formula (3-4), and comprising 30% by weight or less of a low molecular weight compound having a weight average molecular weight of 1,000 or less:

• wherein, in the above formulae (1-1) to (1-4), R1 and R2 each independently represent an alkyl group containing 1 to 20 carbon atoms and optionally having a substituent, or an aryl group containing 6 to 30 carbon atoms and optionally having a substituent,
• R3 to R10 and R3 to R33 each independently represent hydrogen, halogen, alkoxy, an alkyl group containing 1 to 20 carbon atoms and optionally having a substituent, an alkenyl group containing 2 to 20 carbon atoms and optionally having a substituent, or an aryl group containing 6 to 30 carbon atoms and optionally having a substituent,
• Z1 and Z2 each independently represent an alkylene group containing 1 to 5 carbon atoms and optionally having a substituent,
• J1 each independently represents an integer of 0 or more and 5 or less,
• K1 each independently represents an integer of 0 or more and 5 or less,
• A1 and A2 each independently represent either —O— or —CH—,
• L1 and L2 each independently represent an integer of 0 or more and 3 or less, and
• X represents a single bond or any one of structural formulae represented by the following formula (2):
• wherein R11 and R12 each independently represent hydrogen, halogen, an alkyl group containing 1 to 20 carbon atoms and optionally having a substituent, or an aryl group containing 6 to 30 carbon atoms and optionally having a substituent, or R11 and R12 bind to each other to form a carbocyclic or heterocyclic ring containing 1 to 20 carbon atoms and optionally having a substituent, and
• a and b each independently represent an integer of 0 or 1 or more and 5000 or less, and
• wherein, in the above formulae (3-1) to (3-4), R13 to R20 and R40 to R51 each independently represent hydrogen, halogen, alkoxy, an alkyl group containing 1 to 20 carbon atoms and optionally having a substituent, an alkenyl group containing 2 to 20 carbon atoms and optionally having a substituent, or an aryl group containing 6 to 30 carbon atoms and optionally having a substituent,
• Z3 and Z4 each independently represent an alkylene group containing 1 to 5 carbon atoms and optionally having a substituent,
• J2 each independently represents an integer of 0 or more and 5 or less,
• K2 each independently represents an integer of 0 or more and 5 or less,
• A1 and A2 each independently represent either —O— or —CH—,
• L1 and L2 each independently represent an integer of 0 or more and 3 or less, and
• Y represents a single bond or any one of structural formulae represented by the following formula (4):
• wherein R21 and R22 each independently represent hydrogen, halogen, an alkyl group containing 1 to 20 carbon atoms and optionally having a substituent, or an aryl group containing 6 to 30 carbon atoms and optionally having a substituent, or R21 and R22 bind to each other to form a carbocyclic or heterocyclic ring containing 1 to 20 carbon atoms and optionally having a substituent, and
• c and d each independently represent an integer of 0 or 1 or more and 5000 or less,
• wherein the molar ratio between the siloxane constituent unit and the polycarbonate constituent unit is 30:70 to 99.9:0.01.