Standard Test Method for Polyurethane Raw Materials: Acidity by Argentometric Determination of Hydrolyzable Chlorine in Monomeric, Aromatic Isocyanates

Importancia y uso:

5.1 This test method is suitable for research or for quality control to characterize TDI and MDI.

5.2 This test method was developed to overcome problems with low-level acidity determinations that use glass electrodes in the presence of reagent alcohol solvents. Reagent alcohols contain acidic and basic species, which complicate the glass electrode methods at low levels of acidity.

Subcomité:

D20.22

Volúmen:

08.03

Número ICS:

83.080.20 (Thermoplastic materials)

Palabras clave:

acidity; HC; hydrolyzable chlorine; isocyanates; isocyanates aromatic; MDI; methylene-4,4’-di(phenylisocyanate); methylene di(phenylisocyanate); polyurethane; raw materials; TDI; test method; titration; toluene diisocyanate;