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Significance and Use
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.
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: Test method A includes a procedure for measuring dynamic viscosity using a rotational instrument. Test method B is simply a reference to a general procedure for measuring kinematic viscosity, .
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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazards statement, see Warning at the end of .
Note 2: This standard is equivalent to ISO 3219 and ISO 3104.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
D883 Terminology Relating to Plastics
E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
ISO StandardsISO 3104 Petroleum Products--Transparent and Opaque Liquids--Determination of Kinematic Viscosity and Calculation of Dynamic Viscosity ISO 3219 Plastics--Polymers/Resins in the Liquid State or as Emulsions or Dispersions--Determination of Viscosity Using a Rotational Viscometer with Defined Shear Rate
ICS Number Code 83.040.30 (Auxiliary materials and additives for plastics); 83.080.20 (Thermoplastic materials)
UNSPSC Code 12352100(Organic derivatives and substituted compounds)
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ASTM D4889-15, Standard Test Methods for Polyurethane Raw Materials: Determination of Viscosity of Crude or Modified Isocyanates , ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top