Geolast(R) Thermoplast Rubber

Thermoplastic Rubber
High Oil Resistance
For applications requiring enhanced oil resistance that meets or exceeds that of nitrile rubber and epichlorohydrin.

Geolast® thermoplastic rubber is an oil-resistant thermoplastic elastomer (TPE) that performs with the versatility of rubber and processes with the efficiency of thermoplastic. With Geolast rubber, you benefit through cost savings and comparable performance to thermoset rubbers such as NBR, polychloroprene, ECO and even some urethanes.

• Performance competitive with NBR and ECO Geolast rubber features good retention of properties in hot air and hot oil aging, and provides a good combination of the low-temperature (-40°C [-40°F]) performance and the degree of oil resistance commonly associated with NBR and ECO rubber compounds. Parts made of Geolast rubber exhibit low oil swell, and the low compression set of Geolast rubber makes it suitable for use in sealing applications.
• Part design with freedom
  Injection-molded parts made from Geolast rubber have two to three times tighter tolerances than thermoset NBR or ECO. You can simplify multi-part designs while you eliminate metal inserts and specify either thick or delicate wall thickness for individual parts.
• Cost savings and efficiency
  Standard thermoplastic processing of Geolast rubber saves time and production steps compared to thermoset rubber. It can be blow molded into various ID/OD shapes with good tolerance control and can also be insert molded or co-injection molded - processes not practical for thermosets. For extrusions, Geolast rubber has low die swell to minimize the trial-and-error process of tuning extrusion dies. You can further control costs by heat-welding components to make larger assemblies. Reprocessed clean Geolast rubber scrap retains key physical properties even after multiple regrinds. The specific gravity of Geolast rubber is 15% to 45% lower than NBR or ECO, permitting you to create more parts per kilogram or pound and produce light-weight parts. Geolast rubber lets you design a better part and make it faster - with potential savings of 15% or more.

Advantages over thermoset

• Lower specific gravity
• Better long-term compression set than NBR or sulfur-cured ECO
• Better retention of elongation when aged in hot air
• Less weight gain than NBR in ASTM Fuel C
• Low weight gain in IRM 903 oil
• Outstanding performance in a broad range of fluids

Advantages by processing in standard thermoplastic production systems

• Direct recycling of clean in-process scrap
• Two to three times closer control of key dimensional part tolerances
• No vulcanization required
• Shorter molding cycle time
• Lower extrusion die swell
• Ability to co-extrude with rigid thermoplastics

AES (Advanced Elastomer Systems, L.P.), 388 S. Main Street, Suite 600. Tel: 330-849-5000; Fax: 330-849-5596.