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Sunday, 21 April 2019

Hardner

4 Posts

Wednesday 23 April 2008 1:00:00 am

After packing a hardner batch we found that it completly cured in its containers in finished products lab ( it formed from organic isocynate uronal).

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Thursday 24 April 2008 1:00:00 am

Do you use nitrogen flushing? The package is inside coated, corrided, please check. The package is proper sealed by a membrane, or just with srew cap. We expert this and you can contact us under: tackservice@aol.com

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Sunday 25 May 2008 1:00:00 am

Your batch is isocyanate from its drum or make the batch by adding solvent and additives? if you use solvents it must be urethane grade if you need help, email me at: automotivpaints@hotmail.com

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Tuesday 27 May 2008 1:00:00 am

If I understand your enquiry correctly, you are repacking an isocyanate crosslinking agent. This process can lead to problems if not carried out in the correct manner. Stock drums of isocyanate should be opened in a dry nitrogen atmosphere. The decanting from the stock drum to the smaller container must be carried out in a nitrogen atmosphere. The containers you are using should prederably be conical bottles made of steel or aluminium. The bottles should contain a tight fitting plastic insert to exclude the entry of air during storage. A nitrogen blanket in the bottle is also strongly suggested. Do some storage tests in your lab before deciding on what type of packaging to use but tight fitting screw cap metal caps are best. Plastic is not suggested.

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Sunday 01 June 2008 1:00:00 am

Also so to add to the above ideas, VANDEMARK sells a product called PTSI=p-Toluenesulfonyl Isocyanate. You add this to a batch of activator in the amount of grams depending on what solvents that are included in the mix as some solvents are more prone to water then others.
This along with overfilling our quart activator cans and purging has eliminated any hardener problems for us.
Best of luck
Barry

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