Standard Test Method for Polyurethane Raw Materials: Determination of Acidity in Moderate to High Acidity Aromatic Isocyanates
|Publication Date:||10 April 1997|
|ICS Code (Raw materials for rubber and plastics in general):||83.040.01|
1.1 This test method determines the acidity, expressed as parts per million (ppm) of HCl, in aromatic isocyanate samples of greater than 100-ppm acidity. The test method is applicable to products derived from toluene diisocyanate and methylene-bis-( 4-phenylisocyanate) (see Note 1).
NOTE 1--There is no similar or equivalent ISO standard.