C08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08K
Use of inorganic or non-macromolecular organic substances as compounding ingredients
C08K
Use of inorganic or non-macromolecular organic substances as compounding ingredients
C08K5/15
Heterocyclic compounds having oxygen in the ring
C08K5/15
Heterocyclic compounds having oxygen in the ring