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Begel 8603 High transparency silicone optical gel

Easy processing and curing.
Middle viscosity, easily mixing as 1:1 by weight or by volume.
Excellent transparency
High stability to ozone and ultraviolet light
High temperature stability
High stability and flexibility at low temperatures
Outstanding resistannce to aging and weathering
Low hardness, soft and flexible

Features

BESIL 8603 optical gel – are two component, silicone elastomers which cures at room temperature by a polyaddition reaction.
This reaction can be accelerated by heat.

Data Sheet

		Besil 8603
		Part A	Part B
Appearance	Visual	Colorless Liquid viscous	Colorless Liquid viscous
Viscosity(at 23°C, mPa.s, approx.)	GB/T 10247-2008	6000	6000
Specific gravity(at 23°C, g/cm3, approx.)	GB/T 15223-1994	0.99	0.99
Mix ratio(at 23°C, by weight)		100:100
Mixed viscosity (at 23°C, mPa.s, approx.)	GB/T 10247-2008	6000
Pot life(at 23°C, minutes, approx.)		30
Hardness, Shore 00	GB/T 531-2008	52±5
Penetration	GB/T 269-1991	20±5
Tensile strength, MPa	GB/T 528-2009	0.55

Application

Provide a glassy clear appearance to parts manufactured using it. The rubber is an evcellent candidate to consider for cost-efficient manufacture of highly transparent optical parts, with very low
Rain-light sensors, camera systems, opticalsensors

How to use

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 BESIL 2300, add 5 to 10% of the quantity of mixed gels . This will make no significant change to the mechanical properties after polymerization. Up to 30% of BESIL 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 gel 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

TDS Download

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