Overview
ISO 16482-1:2013 specifies an oven method to determine the non-volatile-matter (NV) content by mass of aqueous rosin‑resin dispersions used as binders for paints and varnishes. The procedure applies to resin dispersions with a softening point of 60 °C to 100 °C, measured in accordance with ISO 4625‑1 (ring‑and‑ball method). This standardized test gives a reproducible measurement of solid (resin) content after evaporation of water under controlled conditions.
Key topics and requirements
- Scope: NV determination for aqueous rosin‑resin dispersions; applicable softening point range 60–100 °C.
- Principle: evaporate water at 135 °C and determine the mass of the residue.
- Apparatus:
- Analytical balance accurate to 0.0001 g.
- Aluminium dishes, bottom diameter (45 ± 5) mm, rim height ≤ 40 mm.
- Non‑convection oven capable of 135 ± 3 °C.
- Convection oven for dish drying at about 160 °C.
- Reagents: chemically pure toluene and acetone for cleaning.
- Sampling: take representative samples per ISO 15528.
- Procedure highlights:
- Clean dishes with toluene then acetone, dry solvent‑free, then condition in convection oven at ~160 °C for ≥24 h.
- Use three dried dishes per sample (triplicate).
- Weigh a 2.000 g (2 g) test portion into a pre‑weighed dish.
- Heat in non‑convection oven at 135 °C for at least 45 minutes until constant/stabilized weight.
- Cool and weigh; calculate NV from mass of residue relative to test portion.
- Calculation & reporting: NV (%) = (mass of residue / mass of test portion) × 100. Report the mean of three valid results to one decimal place. Include product ID, reference to ISO 16482‑1, test date and any deviations in the report.
Applications and users
- Quality control in paint, varnish and adhesive manufacturing to verify binder solids.
- Incoming inspection of aqueous rosin‑resin dispersions for raw material acceptance.
- R&D and formulation labs assessing resin concentration and batch consistency.
- Independent testing laboratories performing standardized comparisons or certification.
- Useful for regulatory compliance, specification checks, and supplier audits where accurate non‑volatile matter (solid content) is required.
Related standards
- ISO 16482‑2 - Determination of NV by the microwave method (complements Part 1).
- ISO 4625‑1 - Softening point determination (ring‑and‑ball method); defines applicability range.
- ISO 15528 - Sampling of paints, varnishes and raw materials.
ISO 16482-1:2013 provides a clear, repeatable oven method for measuring NV in aqueous rosin‑resin dispersions-essential for reliable binder quality assessment and process control in coatings and related industries.