Bomar Oligomers® BR-640D
- CASE Ingredients Features
- Acid ResistanceAlkali ResistanceChemical ResistanceHigh Dielectric PropertiesLow Temperature FlexibilityLow Water Absorption
- Chemical Family
- Urethane Acrylate/Isocyanate
Bomar™BR-640Dis a polybutadiene (PBD) urethane acrylate with a functionality of two. Designed to meet rigorous electronic applications, BR-640D has many desirable properties typical to PBD resins, combined with radiation curability. In applications requiring thermal cycling resistance, BR-640Dwithstands the extremes of temperature typical of such tests, without undue degradation of properties.Excellent hydrophobic properties exhibited where 0.012 and 0.037% water was absorbed by cured coating when submerged in water for 24 hours. In addition to the adhesion properties, BR-640D showed excellent adhesion to ABS, acrylic, nylon-6, PVC, and PS.
Product families
Applications
- Electronics Coatings
- Potting Compounds
- Electronics Coatings
Product Families
- Oligomers
Other characteristics
- Brand
- Bomar Oligomers
- Markets
- Electrical & Electronics
- Paints & Coatings
- Technology
- CASE Ingredients
- HIGHLIGHTS
- Excellent Hydrophobic Properties
- Acid/Base Resistant
- Low Water Absorption
- Low Temperature Flexibility
- Excellent Dielectric Properties
- Recommended Applications
- Electronic Coatings
- Potting Compounds
- Anti-fog Coatings & Inks
- Viscosity Reduction with Reactive Diluents
Typical Formulations; Tensile Strength, psi**; Elastic Modulus, ksi*; Durometer Hardness; Water Absorption, 96 (24 hrs); MEK Double Rubs (#); Cold Rolled Steel; X - Recommended, XX - Highly Recommended, XXX - Strongly Recommended
Technical data
Table 1 of 1
5 rows| Characteristic | Value | Unit |
|---|---|---|
| Viscosity (50 °C) | 9,000 | cP |
| Pt-Co Color (APHA) | 20 | — |
| Pt-Co Color | 20 | APHA |
| Refractive Index (25°C) | 1.48 | — |
| Density (25°C) | 0.94 | g/cm3 |
