Santoprene® TPV 121-40B265

Santoprene TPV 121-40B265 is a soft, black thermoplastic vulcanizate (TPV) in the thermoplastic elastomer (TPE) family. This material combines a low coefficient of friction with good bonding to TPV and EPDM rubber, in particular EPDM sponge profiles. It offers easy processability due to high shear thinning behavior for injection molding of complex geometries and excellent surface aesthetics without surface bleeding after heat or UV aging. This grade has been designed to provide excellent UV resistance performance to fulfill most global automotive OEM specifications, and is primarily intended for soft corner molding, sails, muckets, and end caps of automotive dense and sponge weatherseals.

Key Features:

• High flow injection molding grade
• Exterior UV stabilized fulfilling SAEJ2527 3.5MJ/m² and PV3930 5.8MJ/m²
• Built-in low coefficient of friction properties
• Specially formulated to replace thermoset EPDM rubber in automotive weather seal and general molding applications
• Designed for shorter processing cycle time compared to thermoset EPDM rubber
• Adheres to vulcanized EPDM rubber (dense and sponge) and TPV
• Excellent surface aspect

Processing Form:

• Injection Molding
• Multi Injection Molding

Processing Notes:
Desiccant drying for 3 hours at 80°C (180°F) is recommended. Santoprene TPV has a wide temperature processing window from 175 to 230°C (350 to 450°F) and is incompatible with acetal and PVC.

For good bonding on EPDM sponge profiles, use fast injection speed at very high temperature in a warm mold. To prevent deformation of the sponge profile, keep injection pressure moderate and holding pressure low. The EPDM profile should be perfectly positioned and maintained in the mold without deformation to ensure maximum surface interaction with the melt. Cooling time should be longer than a typical TPV to initiate recrystallization at the contact interface.