Desmodur® N 75 BA

Bayhydur® Ultra 2655 is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI), used as a hardener in waterborne two-component polyurethane systems. Here's an overview of its characteristics and applications:

Key Characteristics:

1. Chemical Nature:
   • Hydrophilic aliphatic polyisocyanate based on HDI.
2. Appearance and Physical Properties:
   • Viscosity at 23°C: 2,500 - 4,500 mPa·s.
   • NCO content: 20.3 - 21.3%.
   • Hazen color value: < 60.
   • Monomeric HDI content: < 0.10%.
3. Additional Data:
   • Flash point: approx. 192°C.
   • Density: approx. 1.16 g/cm³.

Solubility and Compatibility:

• Compatible with various organic solvents (esters, ethers), but solubility and compatibility should be tested.
• PU grade solvents (with < 0.05% water) should be used to avoid issues with emulsibility.

Properties and Applications:

1. Crosslinking Agent:
   • Suitable for waterborne systems where reliable incorporation and high chemical resistance are required.
   • Disperses easily in the aqueous phase even with low shear forces.
   • Yields coatings with high gloss and low haze.
2. Influence of Cosolvents:
   • Different cosolvents impact dispersibility:
     • Hydrophobic/hydrophilic solvents (e.g., butyl acetate, xylene) lead to coarser dispersions.
     • Solvents like methyl ethyl ketone, methoxypropyl acetate create finer dispersions.
3. Performance:
   • Fast drying, rapid hardening, high ultimate hardness, and excellent chemical resistance.
   • Can be used with waterborne polyol binders (Bayhydrol®) and as a crosslinker for various waterborne polymer dispersions (polyurethane, polyvinyl acetate, polyacrylate, synthetic rubber).
4. Pot Life:
   • The two-component formulation must be used within its pot life, influenced by the composition and other additives.

Handling and Safety:

• Contains reactive HDI polyisocyanate/prepolymer and/or monomeric HDI.
• Requires appropriate protective measures.
• Suitable for industrial or trade use only, not for DIY applications.
• Review the safety data sheet (SDS) for detailed handling and safety instructions.

Storage:

• Store in tightly sealed original containers, protected from moisture, heat, and contamination.
• Hydrophilic isocyanates are very moisture-sensitive; contact with water can generate carbon dioxide and cause pressure buildup.
• Recommended storage temperature: 0º-30ºC.
• Shelf life: Nine months from the date of receipt if stored properly.

Desmodur® ultra N 3390 BA is an aliphatic polyisocyanate (specifically HDI trimer) primarily used as a hardener component in two-component polyurethane coating systems. Here are the key details from the provided datasheet:

Product Overview:

• Trade Name: Desmodur® ultra N 3390 BA
• Type: Aliphatic polyisocyanate (HDI trimer)
• Application: Hardener for lightfast two-component polyurethane coatings

Composition and Specifications:

• Form Supplied: Approximately 90% in n-butyl acetate
• NCO Content: 19.6 ± 0.3%
• Non-volatile Content: 90 ± 1%
• Viscosity (23 °C): 500 ± 150 mPa·s
• Color Value (Hazen): ≤ 40
• Monomeric HDI: < 0.10%

Solubility and Thinnability:

• Solvents: Can be thinned with esters, ketones, and aromatic hydrocarbons such as ethyl acetate, butyl acetate, acetone, toluene, etc.
• Compatibility: Good compatibility with listed solvents; solutions must be tested for storage stability.

Compatibility:

• Compatible With: Aliphatic and aromatic polyisocyanates such as Desmodur® N 100, N 75, N 3200, N 3400, ultra N 3600, and Desmodur® Z 4470; polyester polyols such as Desmophen® 670 and polyacrylates.
• Not Compatible With: Branched polyester polyols like Desmophen® 651 or polyether polyols such as Desmophen® 1380 BT.

Properties and Applications:

• Applications: Suitable for air- and force-drying coatings used in automotive OEM, automotive refinishing, transportation, industrial finishing, and plastics.
• Properties: Provides coatings with high resistance to chemicals and weathering, excellent gloss retention, and superior mechanical properties.

Storage and Handling:

• Storage: Store in original sealed container at 0 - 30 °C, protected from moisture, heat, and foreign material. Product is sensitive to moisture.
• Shelf Life: Product maintains specifications for nine months under proper storage conditions.

Desmophen® NH 1720 is an aminofunctional co-reactant designed for use with polyisocyanates in the formulation of high-solids, two-component polyurethane (PUR) topcoats and coating materials.

Key Characteristics:

• Type: Aminofunctional co-reactant for polyisocyanates
• Appearance: Yellowish to yellow, low-viscosity liquid

Specifications:

• Amine Value: 170.0 - 210.0 mg KOH/g (M129-AFAM 2011-06054)
• Viscosity at 25°C: ≥ 80 mPa·s (M014-ISO 3219/A.3)
• Viscosity at 23°C: approx. 110 mPa·s (M014-ISO 3219/A.3)

Other Data:

• Equivalent Weight: approx. 295
• Density at 20°C: approx. 1.058 g/ml (DIN 51 757)
• Flash Point: approx. 133°C (DIN EN ISO 2719)
• Water Content: ≤ 0.15% (DIN 51 777-1)

Compatibility and Applications:

• Compatibility: Generally compatible with many polyisocyanates and prepolymers. Compatibility testing is advisable.
• Applications:
  • Used in combination with Desmophen® NH 1420 as a co-reactant for Desmodur® N-/ultra N-products.
  • Suitable for high-solids, two-component polyurethane topcoats and coating materials.

Storage and Handling:

• Storage Conditions:
  • Store in original sealed containers.
  • Recommended temperature: 0 - 30°C.
  • Protect from moisture, heat, and foreign materials.
• Shelf Life: Six months from the date of shipment, provided it is stored under the recommended conditions. Testing is recommended if used after this period.

Safety and Labeling:

• Handling: Consult the Safety Data Sheet (SDS) for safety data, handling procedures, and regulatory information.
• Labeling: Follow the latest edition of the corresponding SDS for current classification, labeling, and application methods.

Important Notes:

• Trial Product: This is a trial product, and extensive experience with it may not yet be available. No guarantee can be given regarding the behavior of the product during processing or use.
• Liability and Warranty: Users must determine the suitability of the product for their specific applications through appropriate testing. All information and technical assistance are given without warranty or guarantee and are subject to change without notice.

Manufacturer Information:

Desmodur® VL is an aromatic polyisocyanate based on diphenylmethane diisocyanate (MDI), used primarily in the formulation of two-component polyurethane (PUR) coatings, fillers, sealing compounds, and synthetic resin mortars.

Key Characteristics:

• Type: Aromatic polyisocyanate
• Chemical Basis: Diphenylmethane diisocyanate (MDI)
• Form Supplied: Brown liquid with low viscosity

Specifications:

• NCO Content: 31.5 ± 0.5%
• Viscosity at 25°C: 90 ± 20 mPa·s

Other Data:

• Equivalent Weight: approx. 133
• Flash Point: approx. 229°C (DIN EN ISO 2719)
• Density at 25°C: approx. 1.23 g/ml (DIN EN ISO 2811-3)

Compatibility and Applications:

• Compatibility: Generally compatible with many hydroxyl-bearing polyesters and polyethers. A brief pre-reaction might be necessary, and compatibility tests should be carried out if there is doubt.
• Applications:
  • Can be combined with Desmophen® grades like Desmophen® 5028 GT, 1380 BT, or castor oil-based polyols.
  • Suitable for coatings that can vary from hard to flexible depending on the Desmophen® product used.
  • Used in systems suitable for coating concrete, asphalt, fibrous cement, and plastics.
  • Water scavengers such as molecular sieve paste® 3 Å are necessary to prevent reaction with water.

Storage and Handling:

• Storage Conditions:
  • Store in original sealed containers.
  • Recommended temperature: 10 - 30°C.
  • Protect from moisture, heat, and foreign materials.
  • Avoid storage at high temperatures to prevent viscosity increase and at low temperatures to prevent crystalline deposits.
• Shelf Life: Six months from the date of shipment, provided it is stored under the recommended conditions. Testing is recommended if used after this period.