Standard Test Method for Acid Number of Styrene-Maleic Anhydride Resins

Importancia y uso:

4.1 This test method is used to determine the property of styrene-maleic anhydride resins functionality. Acid functionality determines the utility of resin as well as being a significant quality control test.

4.2 Because some of the anhydride functionality has been hydrolyzed in the manufacturing process, direct titration with base will produce erroneous data on the total acid content of the fully hydrolyzed resin in use. This test method charges excess alkali to hydrolize the anhydride functionality and neutralize the resulting acid. The remaining unreacted alkali is then back titrated with a standardized acid solution and the acid content is determined by difference.

Subcomité:

D21.02

Referida por:

D3643-15R22

Volúmen:

15.04

Número ICS:

83.080.10 (Thermosetting materials)

Palabras clave:

acid number; free acid; polish; resins; SMA resins; styrene-maletic anhydrid resin; titration;