SALUTATION. PREPARATION OF UREA-FORMALDEHYDE RESIN.

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Presentation transcript:

SALUTATION

PREPARATION OF UREA-FORMALDEHYDE RESIN

AIMS OF THE PRESENT INVESTIGATION

Raw materials: Urea, Formaldehyde (37-40%). 135cm % HCHO Adjusting pH in of the solution 50 g Urea added to the solution pH adjusted to with acetic acid Aliquots solution appeared pH of the solution adjusted to Precipitation occurred gradually Syrup like solution obtained Colorless U- F resin 2-5 cm 3 NaOH stirring Heating for 15 mins reflux Add 1 M NaOH Vacuum distillation Keep 12 hr