Polydiorganosiloxane-polycarbonate block copolymers

Abstract

Abstract A POLYDIORGANOSILOXANE-POLYCARBONATE BLOCK COPOLYMER COMPRISING BY WEIGHT ABOUT 20 TO 90% OF POLYDIORGANOSILOXANE UNITS OF THE FORMULA -(SI(-R)2-O)N- AND ABOUT 80 TO 10% OF POLYCARBONATE UNITS OF THE FORMULA -(((R")A-1,4-PHENYLENE)-C(-R'')2-((R")A-1,4-PHENYLENE)-O- CO-O)P-((R")A-1,4-PHENYLENE)-C(-R'')2-((R")A-1,4- PHENYLENE)-O- THE COPOLYMER HAVING TERMINAL GROUPS OF THE FORMULA X-SI(-R)2-O- WHEREIN EACH R INDEPENDENTLY IS A MONOVALENT OPTIONALLY SUBSTITUTED ALIPHATIC, CYCLOALIPHATIC, ARALIPHATIC OR AROMATIC HYDROCARBON RADICAL WITH 1 TO 12 CARBON ATOMS, EACH R'' INDEPENDENTLY IS HYDROGEN OR A MONOVALENT OPTIONALLY SUBSTITUTED ALIPHATIC, CYCLOALIPHATIC, ARALIPHATIC OR AROMATIC HYDROCARBON RADICAL WITH 1 TO 12 CARBON ATOMS, EACH R" INDEPENDENTLY IS A LOWER ALKYL RADICAL OR A HALOGEN ATOM, EACH X IS A HALOGEN ATOM, A HYDROXYL RADICAL OR LOWER ALKOXY RADICAL, N IS AN INTEGER FROM 2 TO 100, P IS AN INTEGER FROM 1 TO 7 , AND A IS AN INTEGER FROM 0 TO 4. THE COPOLYMERS ARE PRODUCED BY REACTING 1 MOLE OF AN A,W-DIHYDROXYPOLYCARBONATE, DISSOLVED IN AN INERT ORGANIC SOLVENT, WITH ABOUT 1.05 TO 2 MOLES OF AN A.W-DICHLOROPOLYDIORGANOSILOXANE IN THE PRESENCE OF A QUANTITY OF A TERTIARY AMINE STOICHIOMETRICALLY EQUIVALENT TO THE CHLORINE CONTENT OF A THE A,W-DICHLOROPOLYDIORGANOSILOXANE AT A TEMPERATURE UP TO ABOUT 100*C., FILTERING OFF THE AMINESALT AND REMOVING THE SOLVENT.

Inventors

• 👤 W Buechner
• 👤 W Noll
• 👤 B Bressel

Bibliographic Details