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Acrytan SN
Acrytan SN is a water-based acrylic copolymer emulsion used primarily as a binder or film-former in coatings, paints, adhesives, and textile applications. It provides excellent adhesion, flexibility, and durability, along with good resistance to water and weathering.
Acrytan SN
Primary Uses
- Leather Tanning & Retanning
- Used as a synthetic tanning agent (syntan) to improve leather softness and uniformity.
- Enhances fiber dispersion, making leather more flexible and less prone to cracking.
- Often combined with vegetable or chrome tanning for balanced properties.
- Lightfast & White Leather Production
- Ideal for white and pastel-colored leathers (e.g., fashion accessories, upholstery) due to its resistance to yellowing.
- Used in automotive leather, footwear, and luxury goods.
- Fatliquoring & Softening
- Helps retain natural oils in leather, improving suppleness.
Secondary Uses
- Leather Finishing
- Used in top coatings to enhance smoothness and durability.
- Textile & Non-Woven Fabric Treatment
- Occasionally applied to synthetic leather (PU/PVC) for better hand feel.
- Paper & Packaging Industry
- Used in leather-like paper coatings for premium packaging.
1. Basic Identification Attributes
- Chemical Name: Acrylic copolymer emulsion (exact composition varies by manufacturer)
- Common/Trade Names:
- Acrytan SN
- Acrylic textile binder SN
- Polyacrylate emulsion SN
- CAS Number: Proprietary blend (typically based on [9003-01-4] for acrylic polymers)
- HS Code: 3906.90.90 (other acrylic polymers)
- Molecular Formula: (C₃H₄O₂)ₙ (acrylic acid polymer base)
- Synonyms:
- Acrylic resin emulsion
- Textile finishing agent SN
- Polyacrylic binder
2. Physical & Chemical Properties
- Physical State: Milky white liquid emulsion
- Color & Odor: White to off-white; mild characteristic odor
- Melting Point: >150°C (film formation)
- Boiling Point: ~100°C (water evaporation)
- Density: 1.05-1.10 g/cm³ at 20°C
- Solubility:
- Water: Dispersible
- Organic solvents: Forms film when dried
- pH Level: 6.5-8.5 (typically neutral)
- Viscosity: 500-3000 cP (Brookfield, 25°C)
- Solid Content: 40-50% by weight
- Film Formation Temperature: 20-30°C
3. Safety & Hazard Attributes
- Hazard Class (GHS):
- Not classified as hazardous (most variants)
- May contain trace monomers (check SDS)
- NFPA Ratings:
- Health: 1
- Flammability: 1
- Reactivity: 0
- Exposure Limits:
- No specific OEL established
- General dust limit for particulates: 10 mg/m³
- Reactivity:
- Stable under normal conditions
- Avoid strong oxidizers
4. Storage & Handling Attributes
- Storage Conditions:
- Store at 5-40°C
- Protect from freezing
- Keep containers tightly closed
- Incompatible Materials:
- Strong acids/bases
- Polyelectrolytes
- Container Type:
- HDPE drums or IBC tanks
- Stainless steel equipment
- Shelf Life: 6-12 months
- Special Handling:
- Standard PPE (gloves, goggles)
- Avoid skin contact (may cause sensitization)
5. Regulatory & Compliance Attributes
- Regulatory Status:
- REACH registered (for components)
- OEKO-TEX® compliant (most grades)
- FDA compliant variants available
- Hazard Symbols (GHS): None typically
- Transportation Restrictions:
- Not classified as dangerous goods
- UN number: None required
- Waste Disposal Method:
- Coagulate and dispose as solid waste
- Follow local regulations
6. Environmental & Health Impact
- Ecotoxicity:
- LC50 (fish): >100 mg/L
- EC50 (daphnia): >100 mg/L
- Persistence:
- Not readily biodegradable
- Carcinogenicity:
- Not classified (IARC/NTP)
- Biodegradability:
- <10% in 28 days (OECD 301B)
Safety Precautions
Personal Protective Equipment (PPE)
- Gloves: Nitrile or neoprene (chemical-resistant)
- Eye Protection: Safety goggles (for liquid/splash risk) or face shield (if handling powder)
- Respiratory Protection:
- N95 mask (for dust/powder)
- Organic vapor respirator (if handling solvent-based formulations)
- Clothing: Lab coat or chemical-resistant apron
Handling & Storage
- Work in a well-ventilated area (use a fume hood if handling solvents).
- Avoid skin/eye contact—acrylic compounds can be irritants.
- Store in a cool, dry place away from direct sunlight and heat sources.
- Keep away from strong oxidizers (e.g., peroxides, chlorates).
- Ground containers to prevent static buildup (if flammable solvents are present).
Hygiene Measures
- No eating, drinking, or smoking in handling areas.
- Wash hands thoroughly after use.
- Emergency eyewash/shower must be accessible.
First Aid Measures
Inhalation (Dust/Vapors)
- Move to fresh air immediately.
- If breathing is difficult, provide oxygen and seek medical attention.
Skin Contact
- Remove contaminated clothing.
- Wash with soap and water for ≥15 minutes.
- If irritation persists, seek medical help.
Eye Contact
- Rinse eyes with water for ≥15 minutes (hold eyelids open).
- Seek immediate medical attention (risk of corneal irritation).
Ingestion
- Do NOT induce vomiting.
- Rinse mouth with water.
- Seek medical attention if swallowed (risk of gastrointestinal irritation).
Firefighting Measures
Fire Hazards
- Combustible (if solvent-based) but not highly flammable in solid/powder form.
- May emit toxic fumes (CO, CO₂, nitrogen oxides) when heated.
Extinguishing Media
✔ Dry chemical powder
✔ CO₂
✔ Foam (for liquid forms)
✔ Water spray (to cool containers, but avoid water jets if solvents are present).
Firefighting Precautions
- Wear SCBA (self-contained breathing apparatus).
- Cool nearby containers with water spray.
- Contain runoff to prevent environmental contamination.
Spill & Disposal
Small Spills
- Wear PPE.
- Absorb with inert material (sand, vermiculite).
- Place in a sealed hazardous waste container.
Large Spills
- Evacuate area.
- Contain spill with barriers (clay, sandbags).
- Prevent entry into drains or waterways.
Disposal
- Treat as chemical waste (follow local regulations).
- Do not pour down drains.
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