Alkyd resins have been the leading coating resin since the early 1900’s. Most are solvent-borne. The basic chemistry is the reaction of vegetable oils, polyols, and polyacids. Alkyd resins can be engineered to have a wide range of processing and performance characteristics.
Short Oil Alkyd Resins
Short oil alkyd resins are the fastest drying of the unmodified alkyds. The drying rate is efficient for OEM products and high volume manufacturing. They dry too fast for brush application enamels. They feature a good combination of hardness, flexibility, and abrasion and chemical resistance.
- 1Industrial, fast-dry enamels
- 2Industrial baking enamels
- 3Metal primers
- 4Traffic paint
- 5Drum coatings
- 6Aerosol paints and coatings
- 7Clear wood finishes
- 8Industrial wood primers
Medium Oil Alkyd Resins
Medium oil alkyds dry faster than long oil alkyds. The solvents are typically aliphatic or oxygenated. These resins have good durability and gloss retention. They are excellent for high gloss coatings and wood finishes.
- 1Exterior enamels
- 2Traffic paints
- 3Floor enamels
- 4Furniture finishes
- 5Industrial enamels and primers
Medium oil alkyds typically have 40%-to-55% oil content.
Short oil alkyd resins are often cross-linked with melamine or urea, may be air cured or baked. They are excellent for industrial coatings with aromatic or oxygenated solvents.
Short oil alkyds typically have less than 40% oil content.
Urethane-Modified Alkyd Resins, Uralkyds
Solvent-borne polyurethane-modified alkyd resins complement the ease of alkyds with the toughness of polyurethanes. Uralkyds provide abrasion, wear, and chip resistance to enamel paints for both indoor and outdoor applications. They also blend and improve long-oil alkyd coatings.
- 1Clear wood varnishes
- 2Floor paints
- 3Clear sports floor coatings
- 4Industrial primers and finishes
- 6OEM finishes
- 7Decorative exterior coatings
Coconut Oil Alkyds, Non-Drying Alkyd Resins
Coconut oil is a non-drying oil used in short-oil and medium-oil alkyds where crystal clarity and low color are required.
Coconut alkyds can be the principal resin in wood finish coatings or a component in enamels and lacquers. They are widely used a plasticizers and modifiers with other resins. They are compatible with epoxy, melamine formaldehyde, urea formaldehyde, vinyl, and alkyd resins.
Non-HAPS coconut alkyds include such solvents as n-butyl acetate, isobutyl acetate, ethanol and isopropyl alcohol.
- 1OEM factory applied wood coatings
- 2Low VOC baking enamels
Rosin Modified Alkyds
Rosin modification imparts hardness and air-dry speed to medium-oil and short-oil alkyds.
- 1Dark industrial baking enamels
- 3Top-coat enamels
- 4Pigment grinding vehicles
Water-Reducible Alkyd Resin
Water-reducible alkyd resins are typically chain-stopped resins for air-dry and forced air-dry industrial enamel coatings. These alkyd resins have high acid values and high solid levels in water-miscible solvents for further neutralization with amines and for dilution with water. The resins produce low-VOC coatings with longer drying time and similar gloss, flow, and leveling to solvent-borne coatings.
Alkyd Resins for Pigment Grinding and Dispersions
High-solids alkyd resins provide excellent vehicles for pigments and additives concentrates. High acid value alkyds are effective dispersants and grinding aids. Hydrocarbon-modified alkyd resins are effective aluminum vehicles for interior and exterior coatings.
Alkyd Resins in Low-HAPS Solvents and with Low-VOC
Deltech Resin Company produces high-solids alkyd resins, aerosol resins compatible with low-MIR solvent and propellant systems, and resins in such solvents as OXSOL 100TM Parachlorobenzotrifluoride, butyl acetate, PM acetate, dimethyl carbonate (DMC), and custom solvents and solvent blends.
Alkyd Resin Dispersions
Water-dispersions of alkyd resins are VOC-free (solvent-free) alkyd resins. Specialty surfactants produce stable dispersions that are easier to use than water-reducible alkyd resins.
Chain-Stopped Alkyd Resins
Chain-stopped short-oil alkyd resins have tight control on the molecular weight of the resin and produce coatings with improved durability. They are an alternative to short-oil alkyd resins for coatings that require shorter tack-free time.
- 1Top coats and primers for air dry, force dry, or bake
- 2Low bake enamels
- 3Top coats and primers for air dry, force dry, or bake
- 4Low bake enamels
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