DIFF Subgroup
C08G 64/22 using carbonyl halides
Introduced: January 1990
Full Title
Full titles differ between systems:
IPC:
Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule > General preparatory processes > using carbonyl halides
CPC:
Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule (polycarbonate-amides C08G69/44; polycarbonate-imides C08G73/16) > General preparatory processes > using carbonyl halides
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
IPC defines codes here since 1990.
Child Classifications
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