Acrytan SN

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Acrytan 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.

Description

Primary Uses 

  1. 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.
  2. 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.
  3. Fatliquoring & Softening
    • Helps retain natural oils in leather, improving suppleness.

Secondary Uses

  1. Leather Finishing
    • Used in top coatings to enhance smoothness and durability.
  2. Textile & Non-Woven Fabric Treatment
    • Occasionally applied to synthetic leather (PU/PVC) for better hand feel.
  3. Paper & Packaging Industry
    • Used in leather-like paper coatings for premium packaging.
PRODUCT KEY ATTRIBUTE

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: (C₃Hâ‚„Oâ‚‚)â‚™ (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 HANDLING

. 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.

2. 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).

3. Firefighting Measures

Fire Hazards

  • Combustible (if solvent-based) but not highly flammable in solid/powder form.
  • May emit toxic fumes (CO, COâ‚‚, 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.

4. 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.