Where do silicones come from?
Silicones are made from silicon and methyl chloride in a process known as
the “direct reaction” or “direct process.” This reaction between silicon and
our recycled reagents yields methyl chlorosilanes. They are distilled
(purified), and the dimethyldichlorosilane is hydrolyzed to give PDMS. This
product can be formulated or finished into thousands of different products,
which are sold to every major industrial segment.
How are silicones used?
Silicones are highly valued materials because they have a combination of
physical properties not found in other polymers. They have outstanding heat
stability and can be used in applications where organic materials would melt or
decompose. Many silicones seem to be impervious to the effects of aging,
weather, sunlight, moisture, heat, cold, and some chemical assaults. Some
silicones are used to stick, bond, or couple things together – a glue, if you
please.
However, unique surface properties make silicones really different from
other materials. The low surface tension of silicone fluids make them ideal for
applications such as:
• Paper release agents
• Fiber lubricants
• Textile hand modifiers
• Mold release agents
• Antifouling materials
• Water repellents
In fact, silicones have been used as foam-control agents, anticaking aids,
corrosion inhibitors, emulsifiers, lubricants, conditioners, and gloss
enhancers – all because of their unique surface properties.
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