ADDITOL® BP

Omnirad 1173 (formerly known as Irgacure 1173) by IGM Resins is a highly efficient liquid photoinitiator used to initiate the photo polymerization of chemically unsaturated prepolymers, particularly acrylates. Here are the detailed specifications and information based on the provided technical data sheet:

General Information:

• Chemical Name: 2-hydroxy-2-methyl-1-phenyl-propan-1-one
• Molecular Weight: 164.2 g/mol
• CAS Number: 7473-98-5
• Physical Form: Colorless to slightly yellow liquid
• Odor: Slight
• Density: ~ 1.08 g/cm³ at 20°C (68°F)
• Melting Point: 4°C (39°F)
• Boiling Point: 80–81°C (176–178°F) at 0.13 mbar
• Flash Point: > 100°C (212°F)
• Viscosity: ~ 25 mPa·s at 20°C (68°F)
• Miscibility: Miscible in most common organic solvents and acrylate-based monomers, practically insoluble in water

Applications:

• UV-Curable Clear Coatings: Suitable for applications on paper, metal, and plastic materials.
• Compatibility: Excellent compatibility with other photoinitiators, making it suitable for blends.
• Minimal Yellowing: Recommended for UV coatings where minimal yellowing, even after prolonged exposure to sunlight, is desired. Addition of hindered amine light stabilizer Omnistab LS 292 can further reduce yellowing of urethane acrylates.

Recommended Addition Levels:

• Film Thickness 5–20 µm: 2–4% Omnirad 1173 as supplied
• Film Thickness 20–200 µm: 1–3% Omnirad 1173 as supplied

Storage & Handling:

• Storage: Cool, shaded, well-ventilated, dry area away from heat and sunlight.
• Handling: Follow good industrial practices. Refer to the material safety data sheet (MSDS) for detailed handling instructions.

Omnirad 500 is a liquid photoinitiator designed for UV-polymerization of suitable resins in various applications, particularly in UV-curable coatings and inks. Here are the key details based on the provided technical data sheet:

1. General Information:

• Function: Highly effective photoinitiator for UV-polymerization.
• Viscosity: Low viscosity, aiding in reducing the overall viscosity of formulations.
• Suitability: Well-suited for water-based formulations.

2. Chemical Data:

• Chemical Composition: Blend of Benzophenone (50%) + 1-Hydroxycyclohexyl-phenyl ketone (50%)
• CAS Numbers:
  • Benzophenone: 119-61-9
  • 1-Hydroxycyclohexyl-phenyl ketone: 947-19-3

3. Specification:

• Appearance: Colorless to clear pale yellow liquid
• Benzophenone Content: 48.5 - 51.5%
• Omnirad 184 Content: 48.5 - 51.5%
• Transmittance:
  • @ 425 nm: ≥ 95.0%
  • @ 500 nm: ≥ 97.0%
• Clarity of Solution: Clear in toluene solution
• Specific Gravity @ 20°C: 1.080 - 1.180 g/cm³

4. Additional Properties:

• Miscibility: Miscible in most common organic solvents; poorly soluble in water.

5. Applications:

• Usage: After appropriate testing, suitable for UV-curable coating and ink formulations based on acrylates.
• Substrates: Can be applied on paper, wood, metal, and plastics.

6. Recommended Addition Levels:

• Dosage: Optimal performance typically achieved within a range of 2 - 6% of Omnirad 500 in the total formulation.

7. Storage & Handling:

• Storage: Cool, shaded, well-ventilated, dry area away from direct heat and sunlight.
• Handling: Ensure thorough mixing if stratification occurs due to cold storage.
• Durability: Stable for at least 24 months under proper storage conditions.

Irgacure® 500 is a photoinitiator used to initiate the photo polymerization of chemically unsaturated prepolymers, particularly acrylates, in combination with mono- or multifunctional monomers. Here are some key details about Irgacure® 500:

Chemical Nature: It is a blend of two photoinitiators: 1-hydroxycyclohexyl phenyl ketone (Irgacure® 184) and benzophenone (Darocur® BP).

CAS Numbers:

• 1-hydroxycyclohexyl phenyl ketone: 947-19-3
• Benzophenone: 119-61-9

Physical Form: Clear viscous yellow liquid

Applications: Irgacure® 500 is especially suitable for pigmented UV-curable systems, photoresists, and printing plates. It can be used alone or in combination with suitable amines acting as co-initiators or in combination with amine-modified resins for applications such as UV-curable clear coatings for paper, metal, and plastic materials.

Storage: It should be stored below 18 °C (65 °F) to prevent partial solidification. If solidification occurs, the product can be re-liquefied by heating to 25 – 35 °C (77 – 95 °F) using methods such as placing the drum into a hot-water bath.

Safety: Proper handling procedures should be followed as outlined in the safety data sheet. Exposure to sunlight should be avoided, and opened packaging should be closed after use to protect the product against light.

Miscibility: Irgacure® 500 is miscible in most common organic solvents but poorly soluble in water.

Recommended Concentrations: The recommended concentrations of Irgacure® 500 in formulations typically range from 2% to 6%, depending on the specific application.

This information provides guidance on the use, handling, and storage of Irgacure® 500, but users are advised to conduct their own investigations and tests to ensure suitability for their specific purposes.