Dear Dimple Bishnoi,

I have attached one article about synthesis of urea formaldehyde. I hope it would be successful.

Dear all, what is important is the ratio NH2-C(O)-NH2/HCHO, usually excess of formaldehyde is used. Please check the following documents. My Regards

https://www.researchgate.net/publication/228341150_Effect_of_Fibre_Loading_on_Urea-formaldehyde_Matrix_Based_Green_Composites

https://www.researchgate.net/publication/343655268_Eco-Friendly_Urea-Formaldehyde_Composites_Based_on_Corn_Husk_Cellulose_Fiber

https://doi.org/10.1155/2016/5954636

https://doi.org/10.3126/jist.v24i1.24623

Gratitude to both of you Abdelkader BOUAZIZ and Mina Karimi-Avargani

Actually, I am from a physics background so not too much knowledge about chemistry and reactions. And my research work on natural fiber composite but still I am not able to reach the final conclusion of synthesis of u/f ratio. My supervisor and my associates tell me the following method ....2ml of 10% NaoH +10 ml of formaldehyde and 6 gm urea heated continuously till we achieve a viscous form of solution it will take 1hr approx.

But I am not satisfied with this method papers shows the f/u ratio must be at 1.03-2:1 but according to my calculations above{, my associate's side} not fitted in this criteria so that I am highly confused about them and above these links the mentions molar ratio and I am totally enabled to calculate exactly required quantity...due to covid I am synthesis this at my home and I have only magnetic stirrer and chemicals.....please help me....and my last samples according to above methods totally hydrous .....Regards

Dear Dimple Bishnoi, this type of resins are well studied over the past years, and everything is well established and understood, just you have to dig the appropriate literature. Following are more chemistry oriented documents. Best of Luck

https://doi.org/10.1016/j.ijadhadh.2019.102440

https://www.researchgate.net/publication/229128115_Effects_of_urea-formaldehyde_resin_mole_ratio_on_the_properties_of_particleboard

https://doi.org/10.1016/B978-1-78242-454-3.00003-2

https://iopscience.iop.org/article/10.1088/1757-899X/223/1/012053/pdf

Hi;

Please check the following documents.

With my best regards