Hi All,
I want to know if there is a proper way to activate polyurethane surface to get activated PU with -OH groups? The polyurethane I am using is a 2-component system comprising polyisocyanate prepolymer based on Methylenedicyclohexyl diisocyanate and polyester polyol. Thanks a lot!
Option 1:
Do the melt transurethane reaction using your PU + excess of diol (such as ethylene glycol, butylene glycol, etc) in presence of some catalyst.
Option 2:
Do the two step reactions, first reaction of your PU + excess of diisocynate and secondly some diol to get hydroxyl groups.
Hi . The attached link can be fruitful
https://www.google.com/url?sa=t&source=web&rct=j&url=https://estudogeral.sib.uc.pt/bitstream/10316/27468/1/Surface%2520modification%2520of%2520polyurethane%2520films%2520by%2520plasma%2520and%2520ultraviolet%2520light.pdf&ved=2ahUKEwjvtarFvL3jAhWJ6aQKHTyhCWcQFjAIegQIChAB&usg=AOvVaw3UltmF5oyyQHEkegzBN3M7
Try using silane technology. You can choose the silane to react with the PU surface and still have active groups to react with what you would like to add to the PU.