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CRYO ADHESIVE EPIFIL-9661

(USED AS AN ADHESIVE FOR THE END FITTING REINFORCEMENT OF POLYIMIDE PIPELINES & AS A MATRIX RESIN FOR THE KEVLAR COMPOSITE OVER WRAP ON LOX FEED POLYIMIDE PIPELINES )

Adhesive EPIFIL-9661 is three part room temperature curing adhesive. Part A is a urethane modified epoxy resin, prepared by the co-reaction of epoxy, polyol and isocyanate. Part-B is a mixture of amine hardeners and Part-C is a Silane Coupling agent. This adhesive system presently finds different applications such as matrix resin for Aramid (Kevlar) composite over-wrap on Liquid Oxygen (LOX) feed polyimide pipelines , for reinforcing the metallic end fittings made of SS-321 and the fibre glass tape to the LOX and LH2 polyimide pipe lines and as a coating material for glass phenolic composite which perform as a thermal isolator between the mix ratio controller and (MRC)/apparent velocity regulator (AVR) valve and the motor in the cryogenic stages of GSLV.

Salient features are:

• Three-component, RT curable, toughened, low viscous polymer liquid adhesive

• Increased pot life [up to approx. 3 hrs.]

• Good bond ability with PI film as well as SS materials

• Flight qualified

Properties

Values

Epoxy value (equivalents/kg) of Part-A

 

3.5 – 4.5

 

Viscosity at 30 0C (cps) of Part-A

 

450 –700

 

Amine Value (mg KOH/g) of Part-B

 

340-400

 

Viscosity at 30 0C (cps) of Part-B

 

350-500

 

Pot life at 25 0C (minutes)

 

180 (minimum)

 

Hardness Shore D (after 7 days cure at RT (30±50C)

 

65 (minimum)

 

Lap Shear Strength (PI-PI on Aluminium alloy back up) at RT (at 25 0C), (in kg/cm2)

 

40 (minimum)

 

 

Lap Shear Strength (PI-Fibre glass tape on SS-321 back up) at RT (air conditioned room, at 25 0C), (in kg/cm2)

40 (minimum)

 

 


 

TECHNOLOGY TRANSFER FROM ISRO

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.

For further details, please contact: 

Smt U Sreerekha

Dy. Head Technology Transfer & Industrial Coordination Division (TT&IC)

Vikram Sarabhai Space Centre,

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


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    Site last updated: Monday 11 December 2017
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