Bectron PK 4353 is a one-component resin system which cures to form a semi-flexible polyurethane du- roplastic. It comprises a liquid polyol system with a dispersed solid encapsulated polyisocyanate and a pigment combination selected to provide controlled rheology including excellent thixotropic properties.
FEATURES
- The cured material displays high elasticity and strength resulting in very good temperature cycling behaviour within the range of -50°C to +125°C as well as good resistance to vibrations.
- Bectron PK 4353 also displays very good adhesion to most materials used in the electronic field. Even after several temperature cycles there is no loss of adhesion, and the level of mechanical and electrical properties is maintained.
- Satisfies ROHS Directive
APPLICATIONS
- The cured Bectron PK 4353 is a semi-flexible duro-plastic suitable for chemical and shock protection of components.
- Bectron® PK 4353 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 used as a casting/potting resin for electronic components and sensors, automotive electronics, plugs etc.
Properties of component as supplied
Property | Condition | Value | Unit |
Viscosity, DIN 53019 | D=15 s-1 23°C , | 3.500 ± 500 | mPa.s |
Density, DIN 51757 | 23°C | 1,33 ± 0,02 | 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 ± 5 | 30 ± 5 | min |