Overview
ISO 16482-2:2013 specifies a microwave method for determining the non-volatile-matter content (NV) by mass of aqueous rosin‑resin dispersions used as binders for paints and varnishes. The procedure uses a microwave moisture analyser to evaporate volatile components while leaving the resinous solids as residue. This part applies to resin dispersions with a softening point between 60 °C and 100 °C (measured per ISO 4625-1).
Key topics and requirements
- Scope: Measurement of NV content for aqueous rosin‑resin dispersions using microwave heating; limited to dispersions with specified softening point range.
- Principle: Volatile substances absorb microwave energy and evaporate; solids remain relatively cool. Mass loss equals evaporated volatiles.
- Apparatus: A microwave moisture analyser and glass-fibre sample pads are required.
- Sampling: Take representative samples in accordance with ISO 15528.
- Procedure:
- Perform a single determination.
- Place two glass-fibre pads on the balance, tare, and spread 1–2 g of sample thinly on one pad.
- Cover with the second pad to form a “sandwich” and start the automated cycle.
- The instrument automatically weighs, dries, and computes the result.
- Results:
- Results are reported as a percentage by mass to two decimal places.
- The instrument calculates NV from the masses of pads, sample before heating, and residue after heating.
- Test report: Must include product identification (manufacturer, trade name, batch), reference to ISO 16482-2, test result, any deviations from the method, and the test date.
Applications
- Quality control of binders for paints and varnishes to ensure consistent solids content in production and incoming raw materials.
- Routine laboratory testing in paint and varnish manufacturing plants to monitor formulation and drying properties.
- R&D and formulation development where accurate NV measurements influence coating performance, viscosity, and coverage.
- Compliance testing for material specifications and supplier verification.
Who should use this standard
- Paint and varnish manufacturers and formulators
- Raw material and rosin‑resin suppliers
- Independent testing and calibration laboratories
- Quality assurance and regulatory teams in coatings industry
Related standards
- ISO 16482-1 - Oven method for NV determination (companion method)
- ISO 4625-1 - Determination of softening point (ring-and-ball method)
- ISO 15528 - Sampling of paints, varnishes and raw materials
- ISO 4618 - Relevant terms and definitions
Keywords: ISO 16482-2, non-volatile-matter content, aqueous rosin-resin dispersions, microwave method, microwave moisture analyser, binders for paints and varnishes.