saved
Need
Status: Need is Closed

Alternative solutions for the use of carbon black in butyl rubber

Request Number

NG_2017_0013_N_181
Point of Contact
Need was closed on
Aug 7
Description

Siemens is searching for a new IIR material that does not contain any carbon black as a filler.

The material will be used in O-rings. An O-ring is a mechanical gasket in the shape of a torus. It is a loop of elastomer with a round cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface.

Background

Elastomer compounds often contain carbon black as a spherical filler, e.g. to adjust hardness or compression set. With these rubber compounds (e.g. NBR, EPDM or IIR) external suppliers produce O-rings by injection molding in different geometries.

We are looking for an IIR that does not contain any carbon black. This is necessary to prevent contact corrosion between IIR and various metals.

Key success Criteria

Following key success criteria have to be fulfilled:

  • Type of elastomer: IIR or CIIR
  • Working temperature: -40°C - +80°C
  • Hardness: Shore A 50 – 80
  • Lifetime: about 40 years
  • Lowest possible permeation coefficient for O2, N2 and CO2
  • No usage of carbon black
  • General suitability of the compound for production of O-rings
  • General suitability of the compound for application as O-rings
Possible Approaches

Siemens is open to all compounds of the basis of IIR that meet the success criteria.

Approaches not of Interest

Carbon black as a filler is not allowed in the compound.

No materials from the List of Declarable Substances according to REACH are allowed. Reference list can be found here: https://www.bomcheck.net/en/suppliers/restricted-and-declarable-substances-list

 

Due Date
Aug 1
Items to be submitted

We are looking for concise, non-confidential proposals. The proposal should:

  • Describe the technical approach
  • Provide information on the performance of the technology (if available)
  • Include a description of the responding organisation or team and their experience.

To Respond, please use the Respond button located at the end of this page.

Please note that only non-confidential information can be accepted. By submitting a response you represent that the response does not contain and will not be deemed to contain any confidential information of any kind whatsoever. By submitting a response, you acknowledge that Siemens, in its sole discretion, may select or reject a response or any portion thereof. Your NineSights community profile should contain all required information in order to provide us with appropriate contact information for your responses.

For questions about NineSights privacy and security, please feel free to post in our Community Help forums.

Gallery Moderator(s)
Dezarae Carver
Request Number
NG_2017_0013_N_181
Preferred Collaboration Types
Area of Interest