Crosslinking aromatic polyamides (aramids)

  • From Spain
  • Responsive
  • Patents for licensing

Summary of the technology

The new cross-linked aramid polymers have shown improved properties, in particular, electrical insulation, thermal, stability, and/or mechanical properties while maintaining ease of processing. Further, the properties shown by the new cross-linked aramids of the invention render the product especially suitable for advanced technological applications. The crosslinking can be done without investment in nowadays aramid fiber industrial production facilities.


Details of the Technology Offer

New and innovative aspects

Crosslinking of aramid fibers by conventional production technologies (wet, dry, and dry-jet wet spinning). The crosslinking of armid fibers will render materials with even higher fire, mechanical and electrical-isolation performance.

Main advantages of its use

The crosslinking of armid fibers will render materials with even higher fire, mechanical and electrical-isolation performance.


The technology relates to a process for the preparation of a cross-linked aramid polymer comprising the step of heating a non-crosslinked polymer comprising the repeating unit of formula (I), figure 1 (see attached document), at a temperature comprised of from 150 to 400ºC for a period of time comprised of from 1 second to 20 minutes, wherein A and B are independently selected from meta-phenylene and para phenylene (see Figure 2 in the attached document), and R1 and R2 are independently selected from H and N3, with the proviso that at least one of R1 and R2 is N3, and R1 and R2 are attached to any of the positions 1, 2, 3, or 4 in para phenylene and 1, 2, 3 in meta-phenylene.
The heating step of the non-crosslinked polymers comprising the repeating unit of formula (I) at a temperature from 150 to 400ºC yields thecross-linking of the polymeric materials and gives rise to improved mechanical and thermal properties, while maintaining ease of processing. In particular, the cross-linked polymers of the invention have shown advantageous Young´s Modulus and Tensile Strength, and lower dielectric constant, when compared with non crosslinked aramids.


Aramid fiber proudction companies, such us DuPont, Teijin, Kolon industries, Hyosung, SRO Group, Yantai Sapndex co., Woongjin, Huvis, and Kermel.

Intellectual property status

Protected by PCT/EP2013/062824

Current development status

Device already developed and validated for industrialization.

Desired business relationship

Commercial Agreement, License Agreement, Technical Cooperation: further development; Technical Cooperation: testing new applications; Technical Cooperation: adaptation to specific needs.

Intellectual property status

Related Keywords

  • Surface treatment (painting, galvano, polishing, CVD, PVD)
  • Materials Technology
  • Chemistry
  • Polymer-based composites
  • Industrial Products
  • Chemicals and Materials
  • Other
  • Aramid
  • aromatic polyamides
  • high performance fibers
  • crosslinked fibers
  • crosslinked aramids


The aim of the The Technology Transfer Office (TTO) of the Univesidad de Burgos is to promote Innovation technology through the reseach results transfer and the conexions between the University and the new needs and requirements of the society - we are the link between the University and the Industry. Contact person: José Manuel López (


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