HARDENER
courtesy: Pidilite Industries Ltd.

Hardener is used as a cross linking agent for Polyurethane Solvent Borne Adhesives. It can also be used as a Primer in specific cases.

Application Instruction: Add required quantity of Hardener (as per chart below) to the polyurethane adhesive and mix well until uniform colour is attained. Even though the pot life of mix is 6-8 hrs. or more, the prepared mix should be consumed in a reasonable time i.e. 1-2 hrs to avoid the effect of solvent evaporation and thickening of the mix leading to inferior spreading property. Keep the pot covered whenever not in use.

MIXING RATIO:

Now apply the above mixture on the substrates as per the appropriate procedure.

POT LIFE AND CURING TIME:
When using hardener with appropriate adhesives, the pot life of the mixed adhesive is usually 6 to 8 hours at normal room temperature. This period will be shorter in an open container due to solvent evaporation.

PRECAUTION:
Care must be taken to ensure that Hardener and Mixed, Uncured Adhesives are not contaminated with water as this could have a detrimental effect on pot like as well as bond strengths.

note: It is recommended that before using the product in full scale production, the manufacturer should make his own tests to determine the suitability of the product under his operating conditions. As the circumstances under which the products are stored, handled and used are beyond the control of supplier, one cannot assume responsibility for their misuse by the manufacturer.  

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