ASTM D6099-13

ASTM D6099-13 - 1.9.2013

Significance and Use

5.1 This test method can be used for research or for quality control to characterize aromatic isocyanates and prepolymers of moderate to high acidity. Acidity correlates with performance in some polyurethane systems.

1. Scope

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—This test method is equivalent to ISO 14898, Test Method A.

2. Referenced Documents

D883-26a	Standard Terminology Relating to Plastics (Includes all amendments and changes 6/15/2026).
E180-03	Standard Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals (Withdrawn 2009)
E691-23	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ISO 14898	Plastics--Aromatic isocyanates for use in the production of polyurethane--Determination of acidity Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.