EBECRYL® 4766 is an undiluted polyester methacrylate with incorporated hydroxyl groups, specifically formulated for UV/EB energy curing and dual-cure coatings. This product allows combination with isocyanate-functional urethane acrylate resins for the development of coatings that undergo a dual-cure process involving UV-induced polymerization and the NCO/OH reaction. EBECRYL® 4766 offers high gloss, faster curing cycles, low-temperature curing capabilities, outdoor durability, low energy consumption, and improved flexibility. Its applications span various industries, with a particular emphasis on automotive OEM coatings and other specialty coating formulations, making it suitable for a range of end uses in radiation-curable coatings.

Chemical Family: Polyester Acrylates

End Uses: Radiation Curable Coating

Features: Faster Cycle Time, High Gloss, Improved Flexibility, Low Energy Consumption, Low Temperature-Curing, Outdoor Durability

Technical Data Sheet
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Identification & Functionality

Chemical Family
CASE Ingredients Functions
Technologies

Features & Benefits

Applications & Uses

Cure Method
Suggested Applications

EBECRYL® 4766 can be combined with isocyanate functional urethane acrylate resins for the formulation of coatings cured by a dual-cureprocess (UV induced polymerization and NCO/OH reaction).

Suitable (1)isocyanate functional urethane acrylate resins include EBECRYL® 4141 ,(1)4510 (1) and 4765 .Coatings formulated with EBECRYL® 4766 are applied by spraying, curtain coating or roller coating (≤100g/m2) and cured after an adequate flash-offtime, if required.Dual-cure processes include: NCO/OH reaction followed by UV curing. The NCO/OH reaction canprovide a non-blocking coating suitable for thermo or vacuum forming processes.

UV curing of the formed coating increases its durability and chemical resistance.

UV curing to provide a hard coating surface, with subsequent NCO/OH reaction which provides through curing, particularly inpigmented systems and shadowed areas.

The reaction of the isocyanate groups can be accelerated with standard two-component polyurethane catalysts. Photo-initiators are required forUV curing, with typical photo-initiators being suitable.

The type and amount of catalysts and/or photo-initiators should be adjusted to the plant and process condition.

Pot-life of two component-systems should be tested in accordance with the planned application.

Properties

Physical Properties
ValueUnitsTest Method / Conditions
Acid Valueapprox. 30mgKOH/g
Density1.17g/cm³
Flash Pointmin. 100°C
Typical Properties
ValueUnitsTest Method / Conditions
Colormax. 400Pt-Co
Hydroxyl Value4.8 - 6.1%
Water Contentmax. 0.10%
Viscosity (23°C)2000-5000cP/mPa·s

Safety & Health

Precaution
Avoid contact with eyes and skin. Wash thoroughly after handling. Keep container tightly closed. Use with adequate ventilation.

Packaging & Availability

Regional Availability
  • Africa
  • Europe
  • Middle East

Storage & Handling

Storage and Handling
Before using EBECRYL 4766, consult the Safety Data Sheet for additional information on safety and handling procedures, and recommended personal protective equipment. Ebecryl 4766 should be stored in a cool, dry location. Care should betaken not to expose the product to high temperature conditions, directsunlight, ignition sources, oxidizing agents, alkalis, acids or water.Prevent inadvertent contact with peroxides and other radical initiators and contact with copper, copper alloys, carbon steel, iron and rust. This might cause uncontrollable polymerization of the product with thegeneration of heat. Storage and handling should be in stainless steel, amber glass, amber polyethylene or baked phenolic lined containers.Procedures that remove or displace oxygen from the material should beavoided. Do not store this material under an oxygen free atmosphere. The product is sensitive to moisture. Skin formation may occur in openedcontainers. Dry air is recommended to displace material removed from the container.