ASTM D1489:09(R2021) pdf free download – Standard Test Method for Nonvolatile Content of Aqueous Adhesives.
7. Procedure
7.1 Make sure that the sample in the glass jar is of uniform
consistency before removing a specimen for testing. Inspect the sample to ensure that there are no signs of settling or separation of the adhesive. If settling or separation are noted, mix the samples thoroughly. Other factors, such as foaming or contamination may require the samples be replaced.
7.2 Test three l0-g specimens from each composite sample.
7.3 Weigh about 10 g of adhesive into a small beaker to the nearest 0.01 g. Disperse in 50 mL of hot distilled water and transfer to a 2(X)-mL volumetric flask. Rinse the beaker with small portions of hot distilled water and add rinsings to the flask. Dilute to mark with hot distilled water. Perform duplicate tests on each dispersion prepared in this manner.
7.4 Pipet 10 mL of the dispersion into a tared weighing bottle three quarters full of silica sand which has been dried to constant weight.
Nom I—In the case of adhesives that do not reach constant weight, for example those containing glycerin or slightly volatile plasticizers, make one weighing after a specified period of time mutually agreed upon between the manufacturer and the purchaser.
7.5 Dry the sample in the bottle at 105 ± 1°C (221 ± 2°F) in the constant temperature oven until it has reached a constant weight. Determine this by removing the bottle, at predetermined times, and quickly weighing it on the scale. Once the same weight is achieved in two consecutive weighings, return the sample to the oven for 5 mm more. Then, cover the bottle and cool in a desiccator charged with desiccant to room temperature before weighing to the nearest 0.001 g.