PH CONTROL OF THE CONDENSATION REACTION AND ITS EFFECT ON THE PROPERTIES OF FORMALDEHYDE UREA RESINS

Authors
SZESZTAY M LASZLOHEDVIG Z TAKACS C GACSBAITZ E NAGY P TUDOS F
Citation
M. Szesztay et al., PH CONTROL OF THE CONDENSATION REACTION AND ITS EFFECT ON THE PROPERTIES OF FORMALDEHYDE UREA RESINS, Die Angewandte makromolekulare Chemie, 215, 1994, pp. 79-91
Citations number
10
Categorie Soggetti
Polymer Sciences
Journal title
Die Angewandte makromolekulare Chemie → ACNP
ISSN journal
00033146
Volume
215
Year of publication
1994
Pages
79 - 91
Database
ISI
SICI code
0003-3146(1994)215:<79:PCOTCR>2.0.ZU;2-J
Abstract
The conditions of the preparation of formaldehyde/urea (F/U) resins ha ve been supervised with the aim to reduce formaldehyde emission by inf luencing the ratio of methylene/dimethylene-ether-bridge linkages in t he product. The most crucial point of this task is to keep the pH valu es of the reacting mixtures on the required level. The effect of formi c acid, unevitably present in industrial formaldehyde solutions, was n eutralized by applying a new buffer system, containing boric acid and ethylene glycol.