Silicones – Diverse properties and applications Silicones – Diverse properties and applications Other applications  Fire protection  Shock absorbers  Restoration/dental prosthetics Other applications  Fire protection  Shock absorbers  Restoration/dental prosthetics General properties  Adjusted by viscosity  Properties unaffected by changes in temperature  Biological tolerance  High stability to weathering General properties  Adjusted by viscosity  Properties unaffected by changes in temperature  Biological tolerance  High stability to weathering Contradictory properties  Transparency/impermeability to light  Electrically insulating/conducting  Resistance to high/low temperatures  Adhesive/nonstick properties  Hydrophobic/hydrophilic  Antifoams/foam stabilizers Contradictory properties  Transparency/impermeability to light  Electrically insulating/conducting  Resistance to high/low temperatures  Adhesive/nonstick properties  Hydrophobic/hydrophilic  Antifoams/foam stabilizers

Silicones – Biological tolerance Silicones – Biological tolerance Si-O and Si-C bonds in silicone polymers Physiologically inert Medical... (Insulin pump, catheters...) Medical... (Insulin pump, catheters...) Pharmacological... (Tablets/capsule coating, toothpastes) Pharmacological... (Tablets/capsule coating, toothpastes) Cosmetics... (Creams, lipsticks...) Cosmetics... (Creams, lipsticks...)

Silicones – Resistant to weathering Silicones – Resistant to weathering Silicone polymers: resistant to weathering, ozone and UV radiation; Stability of the SiC and SiO bonds and water repellency of silicones Highly durable facade protection Durable, scratch and UV resistant automotive finishes Durable, scratch and UV resistant automotive finishes

Silicones – Colored or colorless Silicones – Colored or colorless Colorless Refractive index determined by R (Me, Ph,....) Colorless Refractive index determined by R (Me, Ph,....) Pigmented Almost any color Control over properties (Elastic, ceramifying, corrosion protection) Pigmented Almost any color Control over properties (Elastic, ceramifying, corrosion protection)

Silicones – Adhesion promoters Silicones – Adhesion promoters Adhesion to inorganic surfaces (glass, metal) Si-O-M bonds SiOH HO-M bridges Adhesion to inorganic surfaces (glass, metal) Si-O-M bonds SiOH HO-M bridges Adhesion to organic surfaces (polymers) Organic functionality (NH2, C(R)=CH2, ) Adhesion to organic surfaces (polymers) Organic functionality (NH2, C(R)=CH2, ) Synthetic resin Silicone Substrate

Silicones – Structural glazing Silicones – Structural glazing Extremely powerful, flexible combinations of metal and glass make innovative structures possible

Silicone release agents Label paper Adhesive Silicone release agent Substrate paper Little interaction due to nonpolar “jacket”