Bectron® PU 4535
Bectron® PU 4535 is a transparent, flexible polyurethane system cured with hardener PH 4901. This solvent-free material resists yellowing, UV exposure, and salt, making it ideal for applications requiring visibility and long-term clarity.
Bectron® PU 4535 Features:
- Transparent and non-yellowing under daylight
- UV and salt resistant
- Flexible and resilient cured compound
- Low viscosity for easy application
- Good dielectric properties
- High surface gloss and ROHS compliant
Bectron® PU 4535 Applications:
- Potting of optoelectronics and sensors
- Clear encapsulation for automotive displays
- LEDs, bonded circuits, and reed relays
About Prostech
Prostech Philippines is a one-stop solution provider for specialty materials and equipment across electronics manufacturing, from PCBA to final assembly. Our core material and equipment solutions include:
- PCB Assembly Materials
- Cleaning & Degreaser
- Circuit Board Protection
- Thermal Management Solutions
- EMI Shielding
- General Assembly Adhesives
- Elastomeric Materials
- Process Equipment: Potting & Coating Systems, UV/ Heat Curing, Plasma Treatment, Tape placement automation, and cleaning machines
Technical Added Value to customer
Prostech offers customized material and process equipment solutions with engineering support throughout R&D, production process optimization, and performance validation. Our in-house lab located in Alabang, Muntinlupa is equipped to conduct electronics material testing, application simulation, and adhesive validation, helping customers reduce the need for onsite trials and accelerate implementation.
International Supply Chain Advantage
Regional warehouse hubs across Vietnam, Singapore, Malaysia, and the Philippines ensure cross-border reliable supply. In Philippines PEZA-bonded warehouse located at Lima Industrial Park, Batangas enables Prostech to provide responsive, demand-based delivery and significantly shortens standard lead time for Philippines customers.
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Properties of materials as supplied
|
Property |
PU 4535 |
PH 4901 |
Unit |
|
Colour |
Colourless |
Colourless |
--- |
|
Viscosity, 23°C, DIN 53019 |
650 ± 100 |
250 ± 150 |
mPa.s |
|
Density, 23°C, DIN 51757 |
1.03 ± 0.05 |
1.09 ± 0.01 |
g/cm³ |
|
Shelf life |
6 |
4 |
months |
Properties of mixture
|
Property |
Condition |
Value |
Unit |
|
Mixing ratio PU 4535 : PH 4901 |
- |
50 : 100 |
Parts per weight |
|
Process Time (200g Mixture) |
23°C |
28 ± 5 |
Min |
|
Density, DIN 51757 |
23°C |
|
g/cm³ |
|
Viscosity, DIN 53019 |
23°C |
550 ± 90 |
mPa.s |
Thermal properties of cured compound*
|
Property |
Condition |
Value |
Unit |
|
Glass transition temperature Beck M 55 |
|
|
°C |
|
Coefficient of thermal expansion Beck M 56 |
> Tg |
|
K-1 |
|
Coefficient of thermal expansion Beck M 56 |
< Tg |
|
K-1 |
