Patent ID: 11952460
Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 21:
22. The polycarbonate resin according to claim 1, where R1 and R2 are selected from the group consisting of
heteroaromatic monocyclic radicals having 5 or 6 ring atoms, which comprise 1, 2, 3 or 4 nitrogen atoms or 1 oxygen atom and 0, 1, 2 or 3 nitrogen atoms or 1 sulfur atom and 0, 1, 2 or 3 nitrogen atoms, where the remainder of the ring atoms are carbon atoms,
heteroaromatic polycyclic radicals, which bear a heteroaromatic monocycle as defined above and 1, 2, 3, 4 or 5 further aromatic rings selected from phenyl and heteroaromatic monocycles, where the (hetero)aromatic rings of polycyclic hetaryl are linked to each other by a covalent bond or fused to each other directly and/or fused to a saturated or unsaturated 4 to 10-membered mono- or bicyclic hydrocarbon ring; and
heteroaromatic polycyclic radicals, which bear at least one saturated or partially unsaturated 5- or 6-membered heterocyclic ring bearing 1 or 2 heteroatoms selected from oxygen, sulfur and nitrogen as ring atoms, and 1, 2, 3, 4 or 5 further aromatic rings selected from phenyl and heteroaromatic monocycles as defined above, where at least one of the further aromatic rings is directly fused to the saturated or partially unsaturated 5- or 6-membered heterocyclic radical and where the remainder of further aromatic rings of polycyclic hetaryl are linked to each other by a covalent bond or fused to each other directly and/or fused to a saturated or unsaturated 4 to 10-membered mono- or bicyclic hydrocarbon ring.