C CHEMISTRY; METALLURGY
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
C08K5/00 Use of organic ingredients
C08K5/04 Oxygen-containing compounds
C08K5/09 Carboxylic acids; Metal salts thereof; Anhydrides thereof
C08K5/092 Polycarboxylic acids