A METHOD FOR PREPARING CARBAMIDE FORMALDEHYDE RESIN

A method for the preparation of carbamide formaldehyde resin involves condensation of carbamide in a medium with variable acidity during heating, neutralization of obtained mixture, cooling, after-condensation with additional amount of carbamide, vacuum-drying, subsequent after-condensation of mixtu...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	SHATOKHIN VITALII FEDOROVYCH, TSEHLEVSKYI PETRO MYKOLAIOVYCH, KUNCHENKO OLEKSII PETROVYCH, ROMENSKYI OLEKSANDR VOLODYMYROVYCH, POPOV MYKOLA SEMENOVYCH, TVERDOKHLIB SERHII PETROVYCH, KULYK VASYL MYKOLAIOVYCH, VASCHUK SERHII IVANOVYCH, SHEVCHENKOYURII VOLODYMYROVYCH, VOLOKHOV IVAN VASYLIOVYCH, MOROZ TETIANA YURIIVNA, VAKULENKO ANATOLII LEONIDOVYCH
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A method for the preparation of carbamide formaldehyde resin involves condensation of carbamide in a medium with variable acidity during heating, neutralization of obtained mixture, cooling, after-condensation with additional amount of carbamide, vacuum-drying, subsequent after-condensation of mixture with third portion of carbamide, cooling the obtained resin in the presence of ammonia. Carbamide is loaded in portions up to achieving the final molar ratio of carbamide : formaldehyde of 1:1.14-1.15. Carbamide is loaded in portions at an amount: 100 weight parts with the first portion , 35-40 weight parts with the second portion and 30-35 weight parts with the third portion for 270 weight parts of formaldehyde.