Chapter 105. Thermoplastic Silicone Elastomers

  1. Prof. Dr. Norbert Auner2 and
  2. Prof. Dr. Johann Weis3
  1. Andreas Bauer,
  2. O. Schäfer and
  3. J. Weis

Published Online: 5 MAY 2008

DOI: 10.1002/9783527619924.ch105

Organosilicon Chemistry V: From Molecules to Materials

Organosilicon Chemistry V: From Molecules to Materials

How to Cite

Bauer, A., Schäfer, O. and Weis, J. (2003) Thermoplastic Silicone Elastomers, in Organosilicon Chemistry V: From Molecules to Materials (eds N. Auner and J. Weis), Wiley-VCH Verlag GmbH, Weinheim, Germany. doi: 10.1002/9783527619924.ch105

Editor Information

  1. 2

    Department of Inorganic Chemistry, University of Frankfurt, Marie-Curie-Straße 11, 60439 Frankfurt am Main, Germany

  2. 3

    Consortium of Electrochemical Industry GmbH, Zielstattstraße 20, 81379 Munich, Germany

Author Information

  1. Consortium für Elektrochemische Industrie GmbH Zielstattstrasse 20, D-81371 Munich, Germany Tel: +49 89 74844 0 — Fax: +49 89 74844 350

Publication History

  1. Published Online: 5 MAY 2008
  2. Published Print: 26 SEP 2003

ISBN Information

Print ISBN: 9783527306701

Online ISBN: 9783527619924

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Keywords:

  • silazane;
  • aminosilane;
  • silicone;
  • thermoplastic;
  • urea;
  • urethane;
  • isocyanate;
  • rubber;
  • elastomer

Summary

Various amino fluids were prepared by utilization of a new cyclic disilazane which offers an easy and cost-efficient way to introduce aminopropyl functionality into various systems containing SiOH groups. The reaction of the disilazane is complete in minutes even in the absence of a catalyst and proceeds without release of unwanted byproducts. These amino-functional fluids were reacted with diisocyanates to obtain siloxane-urea copolymers. These materials are solid “two-phase” systems and they exhibit hard block segments embedded in a siloxane matrix. These segments allow the modified rubber to be melted reversibly at elevated temperatures and are thus to be regarded as nonpermanent crosslinking sites. By carefully choosing the appropriate organic segment, it is possible to get silicone rubbers with melting or softening points from 50 °C up to 170 °C. By modifying the amount of organic segments it is also possible to get very soft or very hard materials. The materials display tensile strengths up to 12 MPa and do not need additional fillers.