Product Description
Bectron® PK 4342 is a one-component resin system which cures to form a soft polyurethane duroplastic. It comprises a liquid polyol system with a dispersed solid encapsulated polyisocyanate and a pigment combination selected to provide controlled rheology behaviour.
Heating the resin releases the encapsulated polyiso- cyanate resulting in a polyaddition reaction to give a resistant duroplastic cured material.
In contrast to the usual 2 component resin systems Bectron® PK 4342 is ready to use and distinguished by excellent properties and especially good environ- mental compatibility.
Application of Bectron® PK 4342
- The cured Bectron® PK 4342 is a soft duroplastic suitable for chemical, shock and vibration protection of delicate components.
- Bectron® PK 4342 is therefore most suited for the partial or selective coating of SMD and other compo- nents groups on printed circuit boards and ceramic substrates. It is also widely used as a casting/potting resin for electronic components and sensors, auto- motive electronics, plugs etc.
Properties of Bectron® PK 4342 in cured condition
The cured material displays high elasticity and strength producing excellent temperature cycling behaviour within the range of -60°C to +125°C as well as resistance to vibrations. This ensures minimal crazing even in thick layered applications. Furthermore Bectron® PK 4342 has good adhesion on almost all materials used in the field of electronics. Bectron® PK 4342 has excellent chemical resistance to a wide range of aggressive liquids common in automotive applications. Bectron® PK 4342 has good adhesion on almost all materials used in the field of electronics. Even after several temperature cycles there is no loss of adhesion mechanical and electrical properties. Satisfies ROHS Directive
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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.
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Properties of component as supplied
|
Property |
Condition |
Value |
Unit |
|
Viscosity, DIN 53019 |
D=15 s-1, 23°C |
5.000 ± 1.000 |
mPas |
|
Density, DIN 51757 |
23°C |
1,30 ± 0,03 |
g/cm³ |
|
Shelf life |
23°C |
7 |
months |
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 of cured compound
|
Property |
Condition |
Value |
Unit |
|
Coefficient of thermal expansion, Beck Test M 56 |
-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 |
