Product description
Bectron® PU 4535 with hardener Bectron® PH 4901 is a 2 part system which is cured to form a resilient but flexible transparent polyurethane. It is a solvent free system with which is non-yellowing in daylight.
Features of Bectron® PU 4535
- Colourless and transparent Non-yellowing
- UV and salt resistant
- Resilient flexible potting material Low viscosity
- Good dielectric properties High surface gloss ROHS Compliant
- Good temperature cycling behaviour
Application of Bectron® PU 4535
Potting and coating in situations where visibility of the potted material is required, such as optoelectronics and sensor technology. It can also be used as a clear resin for automotive displays.
- Bonded Circuits
- Sensors
- Reed relays
- LED
- Optoelectronics
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About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
- Adapting product sizes, quantities, and packaging to meet specific needs
- Offering expert advice on suitable equipment and automation processes
- Delivering technical training and on-site support for optimal product use
Moreover, Prostech ensures the safe and accurate global delivery of all materials, including “dangerous goods”, in compliance with legal regulations. For personalized technical support or to receive a quotation, please contact us today.
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 |
