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ASTM D4889-21

Current Revision

Standard Test Methods for Polyurethane Raw Materials: Determination of Viscosity of Crude or Modified Isocyanates

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1.1 These test methods (A and B) determine the viscosity of crude or modified isocyanates. They are applicable to products derived from toluene diisocyanate, methylene di(phenylisocyanate), and polymeric (methylene phenylisocyanate) (see Note 1).

Note 1: Test method A includes a procedure for measuring dynamic viscosity using a rotational instrument. Test method B is a general procedure for kinematic viscosity of isocyanate.

1.2 The values stated in SI units are to be regarded as 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazards statement, see Warning at the end of 5.1.

Note 2: Test Method A is equivalent to ISO 3219, Test Method B is equivalent to ISO 3104.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


4.1 These test methods can be used for research, quality control, or specification tests to characterize isocyanates used in polyurethane products.

4.2 Viscosity measures the resistance of a fluid to uniform continuous flow without turbulence or other forces.

4.3 Some isocyanates exhibit non-Newtonian behavior under certain conditions. Whenever possible, generate results for comparison under the same conditions, that is, the same spindle/speed combination for rotational viscosity and the same tube size for kinematic viscosity.

SDO ASTM: ASTM International
Document Number D4889
Publication Date Jan. 15, 2021
Language en - English
Page Count 5
Revision Level 21
Supercedes
Committee D20.22
Publish Date Document Id Type View
Jan. 15, 2021 D4889-21 Revision
May 1, 2015 D4889-15 Revision
April 1, 2004 D4889-04 Revision
July 10, 1998 D4889-98 Revision
Feb. 1, 2011 D4889-04R11 Reaffirmation