Material Safety Data Sheet (MSDS) for Polyurethane Resin Solution (PU Solution)

Identification

Product Name: Polyurethane Resin Solution
Common Trade Names: PU Solution, Polyurethane Prepolymer Solution
Recommended Uses: Industrial coatings, adhesives, sealants, elastomers, construction material, textile coatings
Supplier Contact: Manufacturer’s name, street address, phone number, emergency contact, email
Product Code: Specify code found on packaging or documentation
Prepared By: In-house chemical safety officer or designated person with qualifications in chemical management
Date of Preparation: Latest revision date with clear format
Emergency Phone Number: Company emergency hotline, local poison control center

Hazard Identification

GHS Classification: Flammable Liquid, Category 3; Acute Toxicity, Category 4 (inhalation); Skin Sensitization, Category 1; Specific Target Organ Toxicity – Single Exposure, Category 3
Label Elements: Signal Word: Warning; Hazard Symbols: Flame, exclamation mark; Hazard Statements: Flammable liquid and vapor, may cause allergic skin reaction, harmful if inhaled, may cause respiratory irritation
Precautionary Statements: Wear protective gloves, avoid breathing vapors, use only outdoors or in well-ventilated area, keep away from heat and ignition sources, wash hands thoroughly after handling, avoid release into the environment
Other Hazards: Vapor may irritate eyes, nose, throat; direct skin contact may trigger allergic reactions
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion

Composition / Information on Ingredients

Polyurethane Prepolymer: 40-80%, proprietary blend, CAS: (varies by manufacturer)
Solvent (e.g., Methyl Ethyl Ketone, MEK): 10-40%, CAS: 78-93-3
Isocyanates (residual): 0.5-2%, CAS: 101-68-8 (MDI), 108-31-6 (TDI), content may fluctuate
Stabilizers and Additives: 1-5%, proprietary, CAS: Mixed
Other Ingredients: Trace components may include plasticizers or flow modifiers, concentration <1%

First Aid Measures

Inhalation: Move person to fresh air, provide comfortable seating, loosen tight clothing, ensure breathing remains steady, seek medical advice if symptoms like coughing, wheezing, or shortness of breath persist
Skin Contact: Remove contaminated clothing, thoroughly wash affected areas with copious soap and water, avoid rubbing resin deeper into skin, consult medical attention for any redness, blistering, or rash
Eye Contact: Immediately flush eyes with lukewarm running water for at least 15 minutes, hold eyelids open and move eyes in all directions, do not rub, consult medical professional for persistent pain or visual changes
Ingestion: Do not induce vomiting, rinse mouth, drink small amount of water if person is alert, seek immediate help from physician or poison center, present safety data for reference
Most Important Symptoms: Respiratory discomfort, itching or swelling on skin, burning in eyes, headache, nausea

Fire-Fighting Measures

Suitable Extinguishing Media: Alcohol-resistant foam, dry chemical powder, carbon dioxide, water spray (not jet)
Unsuitable Media: High-pressure water jet may spread material, risk of runoff
Specific Hazards: Vapors may travel and ignite explosively at a distance, decomposition releases toxic gases (carbon monoxide, nitrogen oxides, hydrogen cyanide), dense smoke can impair egress
Protective Equipment for Firefighters: Full turn-out firefighting gear, self-contained breathing apparatus (SCBA) with positive pressure, chemical-resistant gloves
Special Procedures: Evacuate area, prevent runoff into sewers, cool exposed containers with water spray, avoid inhalation of combustion products

Accidental Release Measures

Personal Precautions: Evacuate unnecessary personnel, restrict area, wear appropriate PPE (nitrile gloves, eye protection, organic vapor respirator), prevent ignition sources
Environmental Precautions: Prevent entry into drains, soil, surface waters, use barriers like earth dikes to contain liquid
Containment and Cleanup: Absorb spill with inert dry material (sand, earth, vermiculite), place in approved containers, ventilate affected area, wash area with water and detergent, dispose according to rules

Handling and Storage

Handling: Always ground/bond containers during transfer, avoid inhaling vapors and direct contact, use only with adequate ventilation, wear recommended PPE, maintain good personal hygiene, never eat or smoke in handling area
Storage: Store in tightly covered containers in cool, dry locations out of sunlight, keep clear of heat sources, ignition points, strong acids, bases, or oxidizing agents, label storage clearly with hazard information, maintain secondary containment for large quantities
Special Considerations: Segregate from incompatible chemicals, keep away from food, tightly seal partially used containers right after access

Exposure Controls and Personal Protection

Occupational Exposure Limits: MEK—ACGIH TLV: 200 ppm TWA, 300 ppm STEL; Isocyanates—Ceiling: 0.02-0.05 ppm
Engineering Controls: Use local exhaust ventilation, containment dikes, capture hoods at mixing areas, monitor airborne levels with badge monitors
Personal Protection: Use chemical-resistant gloves (nitrile, butyl rubber), splash-proof goggles or faceshield, flame-retardant antistatic clothing, organic vapor respirator if controls inadequate, safety shoes
Hygiene Measures: Remove solvent-soaked clothing immediately, wash skin exposed to material at once, keep eyewash stations and showers nearby, do not re-use PPE before washing

Physical and Chemical Properties

Appearance: Viscous, clear to pale yellow liquid
Odor: Distinct, solvent-like with faint chemical notes
Odor Threshold: Detectable at low ppm range
pH: Not applicable or slightly acidic
Melting Point / Freezing Point: Not specified, below 0°C typically
Boiling Range: 79-180°C depending on solvent blend
Flash Point: Approx. 10-25°C (closed cup, varies with solvent)
Evaporation Rate: Higher than water, dependent on solvent
Flammability: Highly flammable liquid and vapor
Vapor Pressure: 70-100 mmHg at 20°C (depends on solvent share)
Vapor Density: Heavier than air
Relative Density: 1.0-1.2 g/cm³
Solubility: Limited in water, soluble in most organic solvents
Partition Coefficient (n-octanol/water): Data not fully established
Auto-ignition Temperature: Above 400°C
Decomposition Temperature: Above 200°C
Viscosity: 200-2000 mPa·s at 25°C

Stability and Reactivity

Chemical Stability: Stable under recommended storage conditions, sensitive to moisture and heat
Reactive Substances: Strong oxidizers, acids, bases, amines
Conditions to Avoid: Exposure to open flames, sparking switches, high heat, direct sunlight, high moisture
Hazardous Decomposition Products: Isocyanates, carbon oxides, hydrogen cyanide, nitrogen oxides, toxic fumes
Polymerization: Uncontrolled polymerization may occur with heat, moisture, or mixing with incompatible substances

Toxicological Information

Acute Toxicity: Harmful by inhalation and skin absorption, oral LD50 varies by component (e.g., MEK about 2,700 mg/kg, rat)
Skin Corrosion/Irritation: Prolonged or repeated contact causes redness, possible allergic reaction
Serious Eye Damage/Irritation: Can cause serious irritation, temporary visual disturbance
Respiratory or Skin Sensitization: Sensitization risk high due to isocyanate content
Germ Cell Mutagenicity: No significant evidence from animal studies
Carcinogenicity: Not classified under GHS; some isocyanates linked to occupational asthma
Reproductive Toxicity: Animal data limited; solvent exposure during pregnancy discouraged
Specific Target Organ Toxicity: Single exposure—respiratory tract, nervous system, headaches, dizziness; repeated exposure—kidney, liver effects rare at workplace concentrations
Aspiration Hazard: Not classified as aspiration toxicant

Ecological Information

Ecotoxicity: Harmful to aquatic organisms; MEK LC50 (fish) approx. 3,200 mg/L (96 h), polyurethane particles persistent in soil
Persistence and Degradability: Organic solvents break down over weeks in environment, resin base resists biological degradation
Bioaccumulative Potential: Not expected to bioaccumulate, partitioning into fatty tissues is low
Mobility in Soil: Liquid solvents move rapidly through porous materials, resin component remains at spill site
Other Adverse Effects: Large releases may form film on water that limits oxygen exchange, improper disposal damages land and aquatic ecosystems

Disposal Considerations

Waste Treatment Methods: Collect in designated hazardous waste containers, do not discharge into sewers
Disposal of Contaminated Packaging: Treat empty drums as hazardous, triple rinse prior to disposal, follow local hazardous waste regulations
Special Precautions: Follow regional and national rules for waste incineration or approved chemical landfill, never pour leftover solution down drains or natural watercourses

Transport Information

UN Number: 1866
UN Proper Shipping Name: Resin solution, flammable
Hazard Class: 3 (flammable liquids)
Packing Group: II or III (depending on flash point and concentration)
Marine Pollutant: Not regulated as marine pollutant under normal circumstances
Special Transport Precautions: Keep containers upright and sealed, secure loads, segregate from food and incompatible materials, provide placards indicating flammable risk
Labels Required: Flammable liquid label, emergency information, product code

Regulatory Information

Global Chemical Inventory Status: Listed on TSCA (US), EINECS (EU), DSL (Canada), AICS (Australia)
GHS Classification: Flammable Liquid, Skin Sensitizer, STOT SE 3, Acute Toxic 4
Other Applicable Regulations: OSHA Hazard Communication (29 CFR 1910.1200), EPA SARA Title III reporting for release, REACH restrictions for isocyanates, state-specific workplace exposure rules
Label Requirements: Hazard pictograms, precautionary and hazard statements, supplier identification, first aid description, disposal statement
Worker Protection Rules: Follow minimum PPE requirements, provide regular hazard communication training, maintain accessible MSDS on site
Restrictions on Use: not for consumer or food-contact applications, managed under occupational chemical safety standards