1. Scope

1.1 This practice covers a popular industry protocol for the rheological characterization of waterborne architectural coatings using three commonly used rotational bench viscometers. Each viscometer operates in a different shear rate regime for determination of coating viscosity at low shear rate, mid shear rate, and at high shear rate respectively as defined herein. General guidelines are provided for predicting some coating performance properties from the viscosity measurements made. With appropriate correlations and subsequent modification of the performance guidelines, this practice has potential for characterization of other types of aqueous and non-aqueous coatings.

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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D562 Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-Type Viscometer

D869 Test Method for Evaluating Degree of Settling of Paint

D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers

D1200 Test Method for Viscosity by Ford Viscosity Cup

D2196 Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield type) Viscometer

D2805 Test Method for Hiding Power of Paints by Reflectometry

D4040 Test Method for Rheological Properties of Paste Printing and Vehicles by the Falling-Rod Viscometer

D4062 Test Method for Leveling of Paints by Draw-Down Method

D4287 Test Method for High-Shear Viscosity Using a Cone/Plate Viscometer

D4400 Test Method for Sag Resistance of Paints Using a Multinotch Applicator

D4414 Practice for Measurement of Wet Film Thickness by Notch Gages

D4958 Test Method for Comparison of the Brush Drag of Latex Paints

Keywords

Brookfield-type viscometer; cone/plate-type viscometer; high-shear viscosity; low-shear viscosity; mid-shear viscosity; paints; rheology; Stormer viscometer; viscosity;

ICS Code

ICS Number Code 17.060 (Measurement of volume, mass, density, viscosity)

DOI: 10.1520/D7394-08

ASTM International is a member of CrossRef.