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Long Oil (45/55)
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Long Oil (45/55) is a type of alkyd resin characterized by its high oil content—typically 45% oil to 55% resin—which results in a flexible, durable film once cured. It is widely used as a binder in oil-based paints, varnishes, and industrial coatings due to its excellent adhesion, gloss retention, and water resistance. The “long oil” designation refers to the proportion of drying oil (usually linseed, soybean, or tall oil) in the resin formulation, which makes it particularly suitable for air-drying applications.
This resin is most commonly used in architectural coatings, primers, anticorrosive coatings, and decorative finishes. Its slow drying nature offers better flow and leveling, especially for brushing applications. It is also valued for its compatibility with a wide range of pigments and solvents.
Description
Uses
Primary Uses
Paints & Coatings Industry
- Used as a binder in architectural and decorative paints.
- Applied in metal primers and anti-corrosive coatings.
- Used in wood varnishes and enamel paints for durability and finish.
- Suitable for air-drying paints applied by brush or roller.
- Common in solvent-based coatings for outdoor applications.
Construction Chemicals
- Incorporated in protective coatings for steel structures and buildings.
- Used in waterproofing coatings and exterior finishes.
Secondary Uses
Industrial Applications
- Used in machinery coatings for rust protection and gloss finish.
- Applied in maintenance coatings for infrastructure and heavy-duty surfaces.
DIY and Handicrafts
Used in artisan furniture restoration and hobbyist painting projects.
PRODUCT KEY FEATURES
Basic Identification Attributes
- Chemical Type: Alkyd Resin (Long Oil)
- Common Name: Long Oil Alkyd Resin 45/55
- CAS Number: Varies (mixture; resin formulation)
- HS Code: 3208.90
- Synonyms: Long Oil Alkyd, Air-Drying Alkyd Resin
Physical & Chemical Properties
- Physical State: Viscous liquid
- Color & Odor: Pale amber to golden yellow; mild solvent-like odor
- Oil Content: Approx. 45% drying oil
- Resin Content: Approx. 55% alkyd resin
- Solubility: Soluble in organic solvents; insoluble in water
- Drying Time: 12–24 hours (air drying, depending on formulation)
- Viscosity: Medium to high (depending on dilution)
Safety & Hazard Attributes
- GHS Classification: Flammable liquid; may cause skin and eye irritation
- Toxicity: Low when used as directed; flammable vapors may be harmful if inhaled
- Exposure Limits: Refer to SDS based on solvent used
- Allergen Information: Typically not allergenic but may contain trace sensitizers
Storage & Handling Attributes
- Storage Conditions: Store in cool, well-ventilated area away from heat/flames
- Container Type: Metal drums or lined containers with secure seals
- Shelf Life: Up to 12 months under optimal storage
- Handling Precautions: Avoid inhalation of vapors and contact with skin
Regulatory & Compliance Attributes
- Compliant with VOC regulations (where applicable)
- Must meet local environmental safety guidelines
- Manufactured under ISO or GMP-compliant conditions (if applicable)
Environmental & Health Impact
- Biodegradability: Low biodegradability due to synthetic components
- Ecotoxicity: Moderate; avoid release into water sources
- Bioaccumulation: Not expected in cured form
SAFETY HANDLING PRECAUTIONS
Safety Handling Precautions
- PPE Required: Gloves, goggles, and protective clothing recommended
- Handling Guidelines: Use with adequate ventilation; avoid open flames
First Aid Measures
- Inhalation: Move to fresh air; seek medical help if dizziness occurs
- Skin Contact: Wash with soap and water; remove contaminated clothing
- Eye Contact: Rinse thoroughly with water for several minutes
- Ingestion: Do not induce vomiting; seek immediate medical attention
Firefighting Measures
- Fire Hazards: Flammable liquid and vapor
- Extinguishing Media: Dry chemical, CO₂, foam
- Special Precautions: Use self-contained breathing apparatus in case of fire
- Hazardous Combustion Products: Carbon monoxide, carbon dioxide, smoke
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