Matrix resin for composite application EPY PEEKTOH


Indian Space Research Organization at its Vikram Sarabhai Space Centre (VSSC) has developed EPY PEEKTOH resin which is an elevated temperature curing high performance epoxy resin matrix suitable for composite applications. The specialty of the formulation is good mechanical properties, high glass transition temperature and low outgassing properties. This is an ideal matrix resin for processing thick carbon fabric laminates (= 30 mm) without any micro cracks and delamination.

Salient features are:

• Elevated temperature curing

• Very good mechanical properties

• High glass transition temperature

• Low outgassing properties

• Suitable viscosity at 60-70°C for processing two dimensional fabric laminates



Volatile matter at 65°C for 5 hours, maximum



Viscosity at 65°C (poise)




Shore D hardness at 30°C


> 85


Specific gravity at 30°C


1.1 – 1.4

Flexural strength at 25°C (MPa)


110 – 120




= 1.0

CVCM (%)


= 0.1

Glass transition temperature (°C)






EPY PEEKTOH resin is mainly used for fabrication of composite YOKE panel hinge insert for satellites.


ISRO is willing to offer the knowhow of this technology to suitable entrepreneurs / industries in India. Capable manufacturing industries interested in acquiring this knowhow may write with details of their present activities, requirements and plans for implementation, infrastructure and technical expertise available with them, their own market assessment, if any, and plans for diversification to the address given below:


Technology Transfer & Industrial Coordination Division (TT&IC)

Vikram Sarabhai Space Centre, ISRO PO

Thiruvananthapuram-695 022

E mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Ph: 0471-2564081

Fax: 0471-2564134

Ph: 0471-2564081/2565133/2565695

Fax: 0471-2564134 

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