High-Performance Alkyd Resin for Industrial & Decorative Coatings
Union Chemical manufactures premium-grade alkyd resins trusted by coating formulators across 30+ countries.
With 27 years of polymer synthesis expertise, a 150,000-ton annual capacity, and a dedicated R&D team of 60+ engineers,
we deliver consistent quality, competitive pricing, and custom formulations tailored to your application.
What Is Alkyd Resin?
Alkyd resin is a polyester-modified synthetic resin formed by the polycondensation of polyols, dibasic acids, and fatty acids.
It is one of the most versatile and widely used binders in the global coatings industry — accounting for over 40% of all
synthetic coating resins produced worldwide.
Known for excellent substrate adhesion, high gloss retention, weathering resistance,
and compatibility with a wide range of pigments and solvents, alkyd resins are the backbone of architectural paints,
wood finishes, industrial maintenance coatings, and automotive refinish systems.
Types of Alkyd Resin by Oil Length
Union Chemical offers all three major alkyd resin grades. Oil length determines the resin’s flexibility, hardness, drying speed, and solvent compatibility.
1. Long Oil Alkyd Resin (>60% Oil)
Best for: Architectural paints, wood stains, anti-corrosion primers, brush-applied coatings.
- Excellent flexibility and substrate wetting
- Superior brushability and flow-out
- Good exterior durability and yellowing resistance
- Compatible with aliphatic solvents and low-VOC formulations
2. Medium Oil Alkyd Resin (40-60% Oil)
Best for: General industrial paints, machinery coatings, metal furniture, interior/exterior decorative paints.
- Well-balanced hardness and flexibility
- Fast drying with good gloss development
- Excellent adhesion to metal and wood substrates
- Available in air-drying and baking-cure grades
3. Short Oil Alkyd Resin (30-40% Oil)
Best for: Automotive OEM coatings, high-gloss industrial finishes, baking enamels.
- High hardness with fast cure (< 30 min at 120°C)
- Exceptional gloss (20° gloss > 85 GU)
- Outstanding chemical and solvent resistance
- Requires baking or two-component curing systems
Alkyd Resin Grade Comparison
| Property | Long Oil | Medium Oil | Short Oil |
|---|---|---|---|
| Oil Content | 60-80% | 40-60% | 30-40% |
| Solvent | Aliphatic / mineral spirits | Aromatic / aliphatic blend | Aromatic / oxygenated |
| Drying (air) | 8-16 hours | 4-8 hours | 30 min (bake) |
| Flexibility | Excellent | Good | Moderate |
| Hardness | Low-Medium | Medium | High |
| Gloss (20°) | 70-80 GU | 75-85 GU | 85+ GU |
| Chemical Resistance | Moderate | Good | Excellent |
Why Choose Union Chemical Alkyd Resins?
Consistent Batch-to-Batch Quality
ISO 9001-certified production with in-line viscosity and acid value monitoring ensures every drum meets specifications. Tight tolerance control minimizes reformulation work on your end.
Custom Formulation Support
Our R&D team of 60+ engineers can modify oil length, solids content, viscosity, and drying profile to match your exact coating system requirements.
Global Logistics & Flexible Packaging
Available in 200 kg steel drums, 1,000 kg IBC totes, or bulk tanker delivery. Export documentation (COA, MSDS, TDS) provided with every shipment.
Competitive Factory-Direct Pricing
As a manufacturer with 150,000-ton annual capacity, we eliminate middlemen and pass cost savings directly to you. Long-term supply agreements available.
Applications
Wood Coatings
Furniture lacquers, floor varnishes, wood primers, and decorative stains. Our long oil alkyds provide deep substrate penetration and a warm amber finish.
Industrial Maintenance Coatings
Heavy-duty machinery, steel structures, storage tanks, and marine environments. Medium and long oil grades offer the corrosion protection industrial assets demand.
Automotive Refinishing
Basecoats, primers, and clearcoats for auto body repair. Short oil alkyds cure to a high-gloss, chemical-resistant finish essential for professional refinish work.
Decorative & Architectural Paints
Interior and exterior wall paints, trim enamels, and door finishes. Alkyd resins deliver the smooth, durable finish homeowners and contractors expect.
Technical Specifications
| Parameter | Long Oil (UA-100) | Medium Oil (UA-200) | Short Oil (UA-300) |
|---|---|---|---|
| Non-Volatile Content | 60 ± 2% | 55 ± 2% | 60 ± 2% |
| Viscosity (25°C, Gardner) | Z2-Z4 | Z1-Z3 | Z4-Z6 |
| Acid Value (mg KOH/g) | ≤ 8 | ≤ 10 | ≤ 15 |
| Color (Gardner) | ≤ 6 | ≤ 5 | ≤ 3 |
| Oil Type | Soybean / Linseed | Soybean / TOFA | Castor / Coconut |
| Drying Time (Air, 25°C) | 8-16 h | 4-8 h | Bake: 30 min / 120°C |
Custom specifications available upon request. Contact our technical team for TDS with full coating performance data.
Frequently Asked Questions
What is the minimum order quantity (MOQ)?
Standard MOQ is 1 metric ton (5 drums × 200 kg) for trial orders. For established partnerships, full container loads (20 MT / 20′ FCL) offer the best freight economics.
Do you provide free samples?
Yes. We ship 1-3 kg evaluation samples at no cost for qualified buyers. Freight can be arranged on your courier account or prepaid by Union Chemical for high-potential projects.
What certifications do your alkyd resins hold?
Our products comply with ISO 9001 (quality management), ISO 14001 (environmental management), REACH (EU), and RoHS standards. SGS testing reports are available upon request.
Can you match a competitor’s alkyd resin?
Absolutely. Send us a sample or technical data sheet of the resin you currently use, and our R&D team will benchmark and produce an equivalent formulation — often at a more competitive price.
Get a Quote — Free Technical Consultation
Tell us about your coating application and we will recommend the optimal alkyd resin grade.
Response within 24 hours.