MANUFACTURING METHOD OF POLYSILOXANE POLYSILOXANE - POLYCARBONATE COPOLYMER CAPABLE OF SECURING DESIRED PHYSICAL PROPERTIES INCLUDING IMPACT-RESISTANCE PROPERTY AT LOW TEMPERATURE AND FLEXIBLE RATE ETC. EVEN WHEN MAINTAINING LOW VISCOSITY AVERAGE MOLECULAR WEIGHT OF COPOLYMER

摘要

PURPOSE: A manufacturing method of polysiloxane polysiloxane - polycarbonate copolymer is provided to improve the reaction rate of silicone monomer and secure excellent low temperature-resistance property and flexible rate by adjusting input timing of silicone monomer depending on molecular weight of oligomer property polycarbonate.;CONSTITUTION: : A manufacturing method of polysiloxane polysiloxane - polycarbonate copolymer comprises the steps of : manufacturing 'oligomer property polycarbonate oligomeric polycarbonate with adjusted viscosity average molecular weight of 3,000-20,000 (i), adding and blending hydroxy-terminated siloxane with the manufactured 'oligomer property polycarbonate (ii), and reacting and polymerizing the 'oligomer property polycarbonate and the hydroxy-terminated siloxane under the condition of interfacial reaction (iii). The number average molecular weight injected to the above reaction step (ii) is 2,500-15,000.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Input oligomer property; (BB) Input polymer property; (CC,KK) Oligomer property; (DD,LL) Separate heavy liquid; (EE,MM) Polymer property 1; (FF,NN) Polymer property 2; (GG,OO) Washing; (HH,QQ) Catalyst; (II,PP) Assembly, dry; (JJ,RR) Shipment