ISO 16482-2:2013

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.