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Hi, As I´m starting to study/develop polyester resin, I´ve a basic question: I´ve the following formulation: Kilograms % ?cido Ad?pico 2081,7918 62,46...

Ok! Thank you ! One more question: How long this method takes to be completed ? Thank You very much, RT

Unclesyd, Thank You. Could you, please, explain how the coulometric method works ? Regards, Rodrigo Toledo

Hi, I´ve a basic question now: How calculate the amount of glicol (MEG for example) to be added to correct the acidity index of a polyeser resin ? I mean, i´ve a PET with 3,45 mgKoH/g of acidity and I want a resin with acidty value below 0,5 mg KOH. How to make this calculation ? Thanks in...

Hi, I would like to Know if there´s a faster method to check OH number of a polyester resin than the pyridine´s method (that takes 1 hours to be completed). Thank you very much, Rodrigo Toledo

Hi, Does anyone here has experience with polyurethane adhesive prodution for packaging? Just for information exchange... I know the biggest producers are R&H, Henkel and COIM-Nocacote but the products of them are quite similar and I would like know what´s your opinion about trends and new...

Hi DocMax, Thank you very much for all your help ! Still remain the problem to improve the distillation process but your advices helped a lot ! Regards, Rodrigo Toledo

Hi DocMax, Thank you very much for the comments. The polyester I want to produced will be used to produce polyurethane adhesive (Will react with Isocynate) I´ll to explain my process in details:( Excuse any mistakes with my english, ok ? ) DEG+MEG is added to the reactor and heated to...

Hi, I need your help: I would like to know how to improve vacuum distillation process regarding polyester production. The reaction is carried out at 220 degrees Celsius and bottom of the column at 110-120 degrees C and at these conditions much of the DEG and MEG is distilled off when removing...