Dimerized Fatty Acids from Tall Oil (TOFA Dimers), CAS 61788-89-4
Dimerized fatty acids from tall oil (TOFA dimers) are oligomerization (dimerization) products of fatty acids derived from tall oil - a by-product of the kraft pulping process.
Production Process
The production involves three stages:
The production involves three stages:
- Rectification of fatty acids from crude tall oil,
- Catalytic dimerization of acids,
- Distillation of the resulting mixture of dimers, monomers, and polymers.
They are dibasic C₃₆ acids formed from two C₁₈ molecules of tall oil fatty acids - oleic or linoleic acid. The product also contains small amounts of C₅₄ trimers and C₁₈ monomeric acids.
| Parameter | Specification |
|---|---|
| Monomers, % | ≤ 6 |
| Dimers, % | 75–82 |
| Polymers (trimers), % | 15–19 |
| Gardner Color | Transparent, viscous liquid, yellow ≤ 8 |
| Non-soapifiable matter, % | ≤ 1 |
| Acid number, mg KOH/g | ≥ 190 |
| Saponification number, mg KOH/g | ≥ 192 |
| Viscosity, mPa·s at 25 °C | 5500–7500 |
| Phosphorus and iron content, ppm | Phosphorus ≤ 10 Iron ≤ 1 |
| Flash point, °C | > 260 |
Minimum order volume: 200 liters.
Supplied: Galvanized steel drums, as well as heated railway and road tankers.
Shelf life: 12 months from the date of manufacture.
Industrial Applications & Key Properties
TOFA dimers are valued in industry due to the following properties:
TOFA dimers are valued in industry due to the following properties:
- Eco-friendly raw material: Tall oil fatty acids are renewable, granting dimers broad hygienic approval.
- Anti-scuffing properties: In metalworking fluids, dimers enhance anti-corrosion and emulsifying performance of emulsols.
- Process lubricant: Hydrogenated tall oil fatty acids have a grease-like consistency and are used in metallurgy.
- Latex paints: Alkyd resins modified with tall oil are used to produce latex paints with improved water/frost resistance and adhesion.
- Road construction additive: Tall oil derivatives improve the adhesion of bitumen-based emulsions for road paving.
Chemical Composition
Typical dimer acid structure:
Typical dimer acid structure:
- 10–13% - acyclic,
- 55% - cyclic,
- 32% - aromatic.
- polyamides,
- polyesters,
- urethane polyethers,
- specialty paints and cosmetics.
- drilling fluids,
- fuel and lubricant additives.
In stock
Shipment from
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1 business day
Technical
documentation
documentation
Delivery across
Russia and the CIS
Russia and the CIS
411 Vostochny Industrial Zone, Dzerzhinsk, Nizhny Novgorod Oblast, Russia
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