ANSI/ASTM D5629:1999
Test Method for Polyurethane Raw Materials: Determination of Acidity in Low Acidity Aromatic Isocyanates and Polyurethane Prepolymers (08.03)

Standard No.

ANSI/ASTM D5629:1999

Release Date

1999

Published By

American National Standards Institute （ANSI)

Latest

ANSI/ASTM D5629:1999

Scope

This test method measures the acidity, expressed as ppm of hydrochloric acid (HCl), in aromatic isocyanate or polyurethane prepolymer samples of below 100 ppm acidity. The test method is applicable to products derived from toluene diisocyanate and methylene-bis-(4-phenylisocyanate) (see Note 0). Refer to Test Method D 6099 for determination of acidity in moderate- to high-acidity aromatic isocyanates.ISO 14898, Method B is technically equivalent to this test method. The values stated in SI units are to be regarded as the standard. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

ANSI/ASTM D5629:1999 history

• 1999 ANSI/ASTM D5629:1999 Test Method for Polyurethane Raw Materials: Determination of Acidity in Low Acidity Aromatic Isocyanates and Polyurethane Prepolymers (08.03)