Patent ID: 8071693

Claim:
A polysiloxane/polyimide block copolymer having a siloxane content of 5 to 30 weight percent, based on the total weight of the block copolymer and a single Tg, comprising a polysiloxane block and a non-siloxane polyimide block wherein the polysiloxane block comprises repeating units of Formula (I) wherein R 2-5 are methyl groups and R 1 and R 6 are substituted or unsubstituted alkylene groups having 3 to 20 carbon atoms, V is a tetravalent linker selected from the group consisting of substituted or unsubstituted, saturated, unsaturated or aromatic monocyclic and polycyclic groups having 5 to 50 carbon atoms, substituted or unsubstituted alkyl groups having 1 to 30 carbon atoms, substituted or unsubstituted alkenyl groups having 2 to 30 carbon atoms and combinations comprising at least one of the foregoing linkers, g equals 1 to 30, and d+1 equals 4 to 10.