NuSil™ MED-4850

1 of 565 products in this brand
NuSil™ MED-4850 is a liquid silicone rubber.

Polymer Name: Silicone Elastomer

Processing Methods: Injection Molding

End Uses: Drug Delivery Pens, Gaskets, Medical/Healthcare Applications, Valve Parts, Valves

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Identification & Functionality

Chemical Family
Polymer Name
CAS No.
68909-20-6
Technologies

Features & Benefits

Product Highlights
  • Two-part, translucent silicone system designed for use with injection molding equipment
  • Cures with heat via addition-cure chemistry
  • 1:1 Mix Ratio (Part A: Part B)

Applications & Uses

Plastics & Elastomers Processing Methods
Applications
  • For the injection molding of parts requiring a material with a medium durometer including: molded rubber stoppers, gaskets, seals, valves, o-rings and other precision parts
  • Suitable for over-molding applications
  • Can be used with NuSil’s Healthcare color masterbatches for applications requiring colored silicones
Instructions for Use

Mixing

Combine Part A and Part B in a 1:1 mix ratio prior to use. Airless mixing, metering or dispensing equipment is recommended for production operations. If mixing by hand, take care to minimize air entrapment.

Vacuum Deaeration

Remove air entrapped during mixing by common vacuum deaeration procedure, observing all applicable safety precautions. Slowly apply full vacuum to a suitable container of at least four times the volume of material being de-aired. Hold vacuum until bulk deaeration is complete.

Substrate Considerations

Cures in contact with most materials common to biomedical assemblies, exceptions include: sulfur-cured organic rubbers, latex, chlorinated rubbers, some RTV silicones and unreacted residues of some curing agents.

Vulcanization

Curing of the blended elastomer is accelerated by heat. The pre-measured catalyst provides a fixed cure rate. Do not attempt to change molding times by mixing the two components in any other than a 1:1 ratio, as this will affect the properties of the elastomer. Only temperature adjustments should be employed to alter the rate of cure.

Properties

Appearance
Translucent
Typical Properties
ValueUnitsTest Method / Conditions
Durometer Type A50.0
Tensile1,475 (10.17 )psi (MPa)
Elongat ion675.0%
Tear240 (42.33 )ppi (kN/m)
Extrusion Rat e100.0g/minute
Mix Rat io0.042361111
Specific Gravity1.14
Stress at Strain 200 %400 (2.76)psi (MPa)
Work Time72.0hours
Cured Properties
ValueUnitsTest Method / Conditions
Cure at 150 °C5.0minutes
Cure SystemPlatinum

Packaging & Availability

Regional Availability
  • Asia Pacific
  • Europe
  • Latin America
  • North America