Bectron® PK 4344
Bectron® PK 4344 is a one-component resin system that cures to form a soft polyurethane duroplastic. It consists of a liquid polyol system with a dispersed solid encapsulated polyisocyanate and a pigment combination selected to provide controlled rheology, including excellent thixotropic properties. Heating the resin releases the encapsulated polyisocyanate, resulting in a polyaddition reaction that yields a resistant duroplastic cured material. Unlike typical two-component resin systems, Bectron® PK 4344 is ready to use and distinguished by excellent properties and especially good environmental compatibility.
Bectron® PK 4344 Features
- One-component, ready-to-use system
- Soft polyurethane duroplastic
- Low viscosity for rapid coating and thin layer formation
- High elasticity and strength
- Excellent temperature cycling behavior (-60°C to +125°C)
- Good adhesion to most electronic materials
- Excellent chemical resistance to aggressive automotive fluids
- ROHS compliant
Bectron® PK 4344 Applications
- Partial or selective coating of SMD and other component groups on PCBs and ceramic substrates
- Complex potting applications where low viscosity minimizes trapped air bubbles
- Potting resin for sensors, automotive electronics, plugs, and similar devices
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 component as supplied
Property | Condition | Value | Unit |
Viscosity, DIN 53019 | D=15 s-1, 23°C | 2.000 ± 500 | mPas |
Density, DIN 51757 | 23°C | 1,28 ± 0,01 | g/cm³ |
Shelf life | 23°C | 7 | months |
Pot-life, gel-time, curing conditions
Property | Value | Value | Unit |
Temperature | 80 | 90 | °C |
Gel-time | 5 ± 2 |
| min |
Curing | 65 ± 10 | 30 ± 5 | min |
Thermal properties in cured condition
Property | Condition | Value | Unit |
Coefficient of thermal expansion | -20°C to + 90°C | 200·10-6 | K-1 |
Thermal conductivity, DIN 52616 | 23°C | 0,18 ± 0,02 | W/mK |
Glow-wire test, DIN IEC 695, part 21 | 30 s | 850 | °C |
Here are BECTRON® PK-Series (1 Component, heat-curing)
| Product Code | Colour | Viscosity [mPas] | Max Temp. [ºC/20,000 h] | Hardness [Shore] | Cure Speed [min] @ +90 ºC | Thermal Conductivity [W/mK] |
| PK 4332 | Black | 5,250 | +125 ºC | 35 A | 60 | 0.2 |
| PK 4340 | Black | 9,500 | +125 ºC | 70 A | 30 | 0.3 |
| PK 4342 | Black | 5,000 | +125 ºC | 70 A | 30 | 0.3 |
| PK 4344 | Black | 2,000 | +125 ºC | 70 A | 30 | 0.3 |
| PK 4351 | Black | 6,250 | +125 ºC | 30 D | 30 | 0.3 |
| PK 4353 | Black | 3,750 | +125 ºC | 30 D | 30 | 0.3 |
| PK 4364B | Blue | 5,000 | +125 ºC | 40 D | 30 | 0.3 |
| PK 5532 | Black | 5,500 | +130 ºC | 35 A | 30 | 0.2 |
| PK 5542 | Black | 5,000 | +130 ºC | 70 A | 30 | 0.4 |
| PK 5553 | Black | 3,500 | +130 ºC | 30 D | 30 | 0.3 |
