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D3169-89 – Standard Test Method Technical Guide
🌻 Scope and Material Sourcing
This specification (Designation D 3169 – 89, Reapproved 2001) defines the quality requirements for once-refined sunflower oil intended for use in protective coatings. The material must be derived exclusively from sunflower seeds and subjected to a suitable refining process that ensures compliance with the stringent property limits outlined in the standard.
Keywords: drying oils; sunflower oil.
📌 Standard Status: Under the jurisdiction of ASTM Subcommittee D01.32 on Drying Oils, this standard was originally published in 1973 and last reapproved in 2001. It remains a key reference specification for the paints and coatings industry.
📊 Physicochemical Specifications and Tolerances
The performance of refined sunflower oil in coating formulations is directly dependent on its physical and chemical purity. The standard mandates strict compliance with the following values, verified by the designated ASTM test methods.
| ⚡ Property | 🎯 Requirement | 📐 Test Method |
|---|---|---|
| Specific Gravity (25/25°C) | 0.918 to 0.921 | D 1963 |
| Acid Value | 0.3 max | D 1639 |
| Saponification Value | 188 to 194 | D 1962 |
| Unsaponifiable Matter, % | 1.5 max | D 1965 |
| Iodine Value (Wijs) | 134 to 144 | D 1959 |
| Loss on Heating (105°C), % |