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Silopren™ LSR 4739
Silopren™ LSR 4739 is a Shore 30A, two-component, self-bonding liquid silicone rubber recommended for use in healthcare and medical applications.
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- Manufacturer: Momentive
- Product Line: Momentive Silicone Elastomers
- Product: Liquid Silicone Rubber
- Industries: Elastomers
- Authorized Countries: Canada | United States
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Canada
United States
Overview
Silopren™ LSR 4739 is a two-component, self-bonding silicone rubber material for injection molding applications. It offers primerless adhesion to polycarbonate (PC), polybutylene terephthalate (PBT), and copolyesters with a great bond strength that is reached immediately upon demolding. This self-bonding property of LSR 2749 makes it a cost-effective solution for multicomponent injection molding or insert molding. Silopren™ LSR 4739 is specifically designed for use in medical applications, since it is biocompatible and meets USP Class VI requirements.
Specifications
Density, g/cm³: 1.10
Hardness, Shore A: 32
Tensile strength, MPa: 7
Elongation at break, %: 650
Tear strength, die B, kN/m: 40
Primary Chemistry:
Liquid silicone rubber
Features & Benefits
- Features & Benefits
- Primerless adhesion to PC, PBT, and copolyesters
- No special mold treatment required
- No adhesion to the mold
- Biocompatible
- Sterilizable with ethylene oxide, steam, and gamma radiation
- High-temperature stability
- Flexibility at lower temperatures
- Good dielectric and mechanical properties
- Easy to pigment
Problems Solved
Needing a primer for the adhesion of liquid silicone to polycarbonate (PC), polybutylene terephthalate (PBT), or copolyester substrates Resistance of liquid silicone rubbers to sterilization methods
Applications
Respiratory masks Sealing elements Membranes and diaphragms Connectors Surgical and dental handles and grips Other soft–hard combinations
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