Silopren LSR 7090 liquid silicone rubber is a two-component, high-transparency, high-hardness, low-viscosity, fast-cure speed and ultra clear liquid silicone rubber (LSR). Providing good optical clarity, Silopren LSR 7090 liquid silicone rubber combines typical LSR properties, such as high temperature stability and flowability, with excellent UV and blue light stability. As a result, molded lenses produced using this material can exhibit excellent durability and maintain optical clarity, even if exposed to high temperatures or UV light. Due to its high flowability, Silopren LSR 7090 liquid
silicone rubber can help enable excellence in manufacturing complex and micro-structure optical lenses, even in large quantities, utilizing the injection and compression molding processes.

Key Features and Typical Benefits
Optical Clarity

• 94% transmission

• <1% haze

• Abbe number of approximately 50

• Strong color stability

Durability

• High temperature resistance even above 150 °C

• UV light resistance

• Micro-crack resistance

• Listed as UL 94 HB (File No. E56745)

Design Freedom

• High flowability helps enable complex and micro-structure design

• Enhanced options for part integration

• Reduced weight in design

• Colorability due to optical clarity

Productivity

• Excellent processability for injection/compression molding

• Material waste may be minimized in the coldrunner-based LSR injection process

Potential Applications

• Interior and exterior lighting - lenses and other illumination optics

• Automotive lighting - lenses and light guides

• Electronics - Mobile phones, flash lenses, sensing lenses, light guides and other optics

• Solar - primary optics for concentrating PVs