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Begel 8602 two-component high transparency liquid silicone elastomer
- 1:1 mixing convenience
- High transmittance
- Low yellowing
- Room temperature curing or heat curing
- High toughness and surface tack
- More technical optimization
BEGEL 8602 Silicone Liquid Optical Adhesive is a two-component optical grade transparent material that can be bonded to a variety of LCD display modules, including glass, PMMA acrylic and PC polycarbonate，Its excellent optical properties such as high transparency, low atomization, low yellowing rate and excellent reliability can help LCD display modules work for a long time under a variety of conditions.
| Appearance | Part A | Transparent fluid |
| Part B | Transparent fluid | |
| A+B mixing | Transparent fluid | |
| Viscosity, @ 25℃ | Part A | 1000 cPs |
| Part B | 1050 cPs | |
| Operating time @25 ℃ 30 mins | 30 mins | |
| Curing time: @25 ℃ 90mins | 90 mins | |
| Cone penetration after curing, 1/10mm 55 | 55 | |
| Refractive index @ 25℃ 1.41 | 1.41 | |
| Volume resistance @ Ω, 1015 cm | 1015 | |
| Light transmittance % | 450nm @1mm
800nm @1mm 99.6 |
99.2
99.6 |
- Provide a glassy clear appearance to parts manufactured using it. The rubber is an excellent candidate to consider for cost-efficient manufacture of highly transparent optical parts, with very low modulus.
- Rain-light sensors, camera systems, optical sensors.
Remix each of the two components (part A and B) every time before using.
- Mixing of the two components
Add 100 parts A to 100 parts B.
The two components may be intimately mixed either by hand or using a low-speed electric or pneumatic mixer to minimize the introduction of air into the mixture.
The viscosity of part A and B can be reduce using Sepna 2300, add 5 to 10% of the quantity of SI2601. This will make no significant change to the mechanical properties after polymerization. Up to 30% of Sepna 2300 can be added without causing exudation.
- Degassing
After mixing base and catalyst, it is recommended to eliminate entrapped air.
If the processing is done with the help of a machine both parts are degassed before mixing.
The SI2601 A&B is degassed under a vacuum of 30 to 50 mbar. Under vacuum, the product expands 3 at 4 times its initial volume and forms bubbles on its surface. These bubbles will disappear gradually and the mixture will sink back down to its initial volume. Wait a few minutes to ensure complete degassing and then release the vacuum. The product is ready for use.
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