BS4 Thixo - Thixotropic Additive
BS4 Thixo is a completely new, specially formulated thixotroping agent, for use with high strength 2-part Silicone Moulding Rubbers. It has been designed to produce an attractive butter on consistency within seconds of addition to the catalysed or uncatalysed liquid rubber.
It can be employed with the Catalyst (Green), where a long working period is required or, it can be used with Catalyst (Red) for a fast cure system, which can be de-moulded within 2 hours.
Key Features
- Easy addition level
- Rapid development of thixotropy
- Suitable for vertical applications within minutes
Appearance: Clear, colourless to pale yellow liquid
Relative density (at 25°C): 0.90
Viscosity at (25°C): 800 mPa.s
BS4 Thixo - Thixotropic Additive
How to use
The following examples are typical for all:1. For conventional pot-life and cure cycle..
Base: 100 parts by weight
Catalyst (Green): 5 parts by weight
BS4: 2 parts by weightOrder of Addition:
It is not important when using the Catalyst (Green), however, the order of addition shown is recommended because it allows the catalyst to be fully dispersed in the liquid rubber before thixotropy is generated.
When BS4 is added at approximately 2%, the rubber generates
thixotropy within 2 minutes..
A “brush on” or softer thixotropy can be achieved by adding 0.5
to 1.5% of BS4.
2. For Fast Cure and Rapid De-moulding..
Reverse the order of addition described above, adding Catalyst(Red) after thoroughly mixing BS4 into the rubber base.
Because of the much faster rate of cure, the working-or pot-life of this system is much shorter. A typical application is approximately 15 minutes and de-moulding time can be as short as 2 hours and is seldom greater than 4 hours (all times depending on ambient temperature and humidity).