BRANCHED POLYCARBONATE-POLYSILOXANE COPOLYMER AND METHOD FOR PREPARING THE SAME

• Main Authors: JANG, BOK NAM, PARK, JUNG WOO, CHEI, WOO SUK, KIM, JEUNG GON
• Format: Patent
• Language: English; Korean
• Published: 10.07.2013
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PURPOSE: A branched polycarbonate-polysiloxane copolymer is provided to have a high shearing pressure while having excellent low temperature impact strength, high flexibility, excellent mechanical strength, and excellent chemical resistance. CONSTITUTION: A branched polycarbonate-polysiloxane copolymer is obtained using an aromatic dihydroxy compound, a carbonate precursor, a siloxane compound, and a branching agent. The siloxane compound is a compound represented by chemical formula 2, chemical formula 3, or a combination thereof. In chemical formula 2, each of R1-R8 is a substituted or unsubstituted C1-C10 alkyl group or a substituted or unsubstituted C6-C18 aryl group; and each of A and B is a substituted or unsubstituted C1-C10 alkylene group, a substituted or unsubstituted C6-C18 arylene group, a C1-C10 alkylene group containing oxygen or sulfur, or a C6-C18 arylene group containing oxygen or sulfur.