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Medium-oil-length alkyd resin based on phthalic anhydride and soybean oil fatty acids.
Designed for excellent through-dry performance in air-drying coatings.
Delivers balanced hardness development and flexibility for durable film formation.
Compatible with common solvents, pigments, and co-resins including melamine and urea formaldehydes.
Offers good gloss retention and weather resistance in exterior architectural applications.
Exterior architectural paints and primers.
Industrial maintenance coatings for metal structures.
General-purpose decorative enamels for wood and metal substrates.
Undercoats and intermediate coats in multi-layer coating systems.
Low-VOC reformulated solventborne coatings requiring balanced drying and durability.
| Chemical Type | Medium-oil modified alkyd resin |
| Product Form | Liquid |
| Appearance | Clear to slightly hazy amber liquid |
| Primary Applications | Architectural and industrial air-drying coatings |
| Key Features | Through-dry capability, pigment wetting, gloss retention |
| Benefits | Reduced blocking, improved sandability, compatibility with crosslinkers |
| Solvent Compatibility | Compatible with aromatic hydrocarbons, esters, and ketones |
| Storage Stability | Stable at ambient temperature for ≥12 months in sealed containers |
Q1: What is the primary application field for SETAL 312 SM-88?
A: SETAL 312 SM-88 is a medium-oil, cobalt-free alkyd resin designed primarily for high-performance air-drying decorative and protective coatings, including interior and exterior architectural paints, wood finishes, and general industrial maintenance coatings where good gloss retention, hardness development, and yellowing resistance are required.
Q2: Is SETAL 312 SM-88 compatible with common waterborne systems?
A: While SETAL 312 SM-88 is a solvent-based alkyd resin, it can be formulated into hybrid waterborne systems—such as alkyd-acrylic emulsions—using appropriate emulsifiers and coalescing agents. Compatibility must be verified experimentally in each specific formulation due to sensitivity to pH, ionic strength, and surfactant selection.
Q3: How does SETAL 312 SM-88 differ from traditional cobalt-catalyzed alkyds?
A: SETAL 312 SM-88 is formulated without cobalt driers, offering improved regulatory compliance and reduced environmental and health concerns associated with heavy metals. It relies on alternative drier systems (e.g., calcium/zirconium combinations) and is engineered for balanced through-dry performance and reduced surface wrinkling compared to conventional cobalt alkyds.
Q4: What solvents are recommended for diluting SETAL 312 SM-88?
A: The resin is typically dissolved in standard aromatic and aliphatic hydrocarbon solvents, such as xylene, Solvesso™ 100, or high-flash naphthas. Avoid highly polar solvents like ketones or alcohols unless compatibility testing confirms stability and film integrity.
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