EBECRYL® 4738

EBECRYL® 4738 is a weather-stable aliphatic urethane acrylate having a relatively low viscosity due to the allophanate structure. Formulations based on EBECRYL® 4738 exhibit high reactivity and result in hard coatings.

Principal: allnex Radcure

Chemical Family: Polyurethanes (PU), Urethane Acrylates

End Uses: Hard Coat

Features: Abrasion Resistance, Chemical Resistance, Excellent Scratch Resistance, High Reactivity, Improved Mechanical Resistance, Low Color, Low Viscosity, Weatherstable, Yellowing Resistance

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Enhanced TDS

Identification & Functionality

Blend
No
CASE Ingredients Functions
Chemical Family
Function
Binder
Product Code
MITM00329
Single Ingredient
Yes
Technologies
Product Families

Features & Benefits

CASE Ingredients Features
Performance Highlights

EBECRYL 4738 is characterized by:

  • Low color
  • Relatively low viscosity

 

UV/EB cured properties based on EBECRYL 4738 are characterized by the following performance properties:

  • Very good chemical and mechanical resistance 
  • Good scratch resistance 
  • High abrasion resistance 
  • Resistance to yellowing

Applications & Uses

Coating End Applications
Formulation Information
  • Depending on the application, the coating can be adjusted to the appropriate viscosity using standard reactive diluents such as dipropylene glycol diacrylate (DPGDA), 1,6-hexanediol diacrylate (HDDA), isobornyl acrylate (IBOA), and trimethylolpropane triacrylate (TMPTA) or solvents such as butyl acetate.
  • EBECRYL 4738 coating formulations require less reactive diluent and thus the binder properties are retained over a broad range of viscosities.
  • Application at higher temperatures is also possible.
  • The reactive diluent must be selected carefully as it may impact considerably on the properties and storage stability of the coating.
  • Because of the many potential combinations with reactive diluents and solvents compatibility must be tested in each individual case.
  • UV curing of coatings formulated with EBECRYL 4738 requires the addition of standard commercial photoinitiators.
  • Typical levels are 4-6%, though this may vary to meet the reactivity requirements of the application.
  • In the case of EB curing, a low oxygen atmosphere must be ensured to avoid surface inhibition.
  • Lower gloss coatings can be produced using standard matting agents.
  • Care should be taken with respect to sedimentation which may cause the coating to gel prematurely.

Properties

Physical Form

Regulatory & Compliance

Certifications & Compliance
Contains any chemicals listed on Prop 65 (including impurities, residues, catalysts, monomers, and by-products and excluding heavy metals)?

Safety & Health

Safety Precautions
  • Avoid contact with eyes and skin.
  • Direct contact with this material may cause moderate eye and skin irritation.
  • Use with adequate ventilation.
  • Wash thoroughly after handling.
  • Keep container tightly closed.

Packaging & Availability

Packaging Type

Principal Information

Group Principal Number
S000001
Principal

Storage & Handling

Storage Conditions
  • The maximum recommended storage temperature for EBECRYL 4738 is 4°C to 40°C (39°F to 104°F).
  • Care should be taken not to expose the product to high temperature conditions, direct sunlight, ignition sources, oxidizing agents, alkalis or acids.
  • 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 the generation 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 be avoided.
  • Do not store this material under an oxygen free atmosphere.
  • Dry air is recommended to displace material removed from the container.

Other

Appearance (SDS)
Liquid
Color (SDS)
Colorless
IATA/ICAO Proper Shipping Name
Environmentally Hazardous Substance, Liquid, N.O.S.
IATA/ICAO Technical name (N.O.S.)
Acrylated Resin
IATA/ICAO UN Number
UN3082
IMO/IMDG Proper Shipping Name
Environmentally Hazardous Substance, Liquid, N.O.S.
IMO/IMDG Technical name (N.O.S.)
Acrylated Resin
IMO/IMDG UN Number
UN3082
Item Number
Odor (SDS)
Odorless
Other Hazards
Polymerization may occur from excessive heat, contamination or exposure to direct sunlight. Contact with skin may cause a cross-allergic reaction in persons already sensitized to acrylates.
TDG Canada Proper Shipping Name
Environmentally Hazardous Substance, Liquid, N.O.S.
TDG Canada Technical name (N.O.S.)
Acrylated Resin
TDG Canada UN Number
UN3082
USA/DOT Proper Shipping Name
Environmentally Hazardous Substance, Liquid, N.O.S.
USA/DOT Technical name (N.O.S.)
Acrylated Resin
USA/DOT UN Number
UN3082
Optical Properties
ValueUnitsTest Method / Conditions
Color Scale100.0 APHAAPHA
Color Scale100.0 HazenHazenHazen Color Scale
Chemical Properties
ValueUnitsTest Method / Conditions
Acid Number0.2 mg KOH/gmg KOH/g
Hydroxyl Contentmax. 0.1 %%
Mechanical Properties
ValueUnitsTest Method / Conditions
Elongation3.0 %%at Break
Tensile Strength5800.0 psipsi
Physical Properties
ValueUnitsTest Method / Conditions
Density1.15 g/mLg/mLAt 20°C
Flash Pointmin. 100.0 °C°C
Glass Transition Temperature (Tg)80.0 °C°C
Viscosity30000.0 mPa.smPa.sat 23°C
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Autoignition Temperature (SDS)min. 410.0 °C°C
Boiling Point (SDS)min. 200.0 °C°C
Density (SDS)1.144 g/cm³g/cm³at 20°C
Flash Point (SDS)132.0 °C°CDIN EN ISO 2719 at 101.3kPa
Melting Point (SDS)-32.0 °C°C
Partition coefficient n-octanol/water (SDS)3.617-OECD 117 Log Pow, n-Octanol/Water
Solubility In Water (SDS)185.3 mg/Lmg/Lat 20°C
Vapor Pressure (SDS)0.000444 PaPaat 20°C
Viscosity (SDS)57800.0 mPa.smPa.sDIN 53019 at 20°C