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ASTM D4876

1998 Edition, November 10, 1998

Complete Document

Standard Test Method for Polyurethane Raw Materials: Determination of Acidity of Crude or Modified Isocyanates

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Detail Summary

Superseded By: ASTM D5523

Additional Comments:
W/D S/S BY ASTM D5523, D5629, D6099
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Product Details:

  • Revision: 1998 Edition, November 10, 1998
  • Published Date: November 10, 1998
  • Status: Superseded By:
  • Superseded By: ASTM D5523
  • Document Language: English
  • Published By: ASTM International (ASTM)
  • Page Count: 3
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

1. Scope*

1.1 This test method determines the total acidity, expressed as HCl, of crude or modified isocyanates. The test method is applicable to products derived from toluene diisocyanate, methylene-bis-(4-phenylisocyanate), and polymethylene polyphenylisocyanates. (See Note 1.)

1.2 The values stated in SI units are to be regarded as the standard.

1.3 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. For specific hazards statements see 7.1 and Note 2.

NOTE 1--There is no equivalent ISO standard.