Vol.1, No 4, 1999 pp. 1 - 7
UDC 547
LATEST ACCOMPLISHMENTS IN WATERBORNE
TWO-COMPONENT SYSTEMS FOR ORGANIC COATINGS
Ljiljana Rašković, Suzana Perošević
Faculty of Tehnology, Leskovac
Abstract. Waterborne two-component systems are a manifestation of
a technology of a later date, proven in a large number of applications.
They show characteristics identical to those of two-component systems in
organic solvents and at the same time they have an advantage to contain
a reduced quantity of volatile organic solvents.
The research, described in this paper was directed to waterborne two-component
polyurethane systems formed with specially developed hydroxyl-functional
dispersions and polyisocyanates that could emulgate with water. The paper
discusses the chemistry of these systems in the light of their relevant
importance for technical applications such as pot-life, froth and carbon
dioxide development, film mechanical integrity development in order to
achieve as good stability in hard operating conditions as possible.
NOVIJA DOSTIGNUĆA U VODENIM DVOKOMPONENTNIM
SISTEMIMA ZA ORGANSKE PREVLAKE
Vodeni dvokomponentni sistemi predstavljaju noviju tehnologiju, koja se
dokazuje u velikom broju primena. Oni pokazuju karakteristike podjednake
kao i dvokomponentni sistemi u organskim rastvaračima, a u isto vreme imaju
tu prednost da sadrže smanjenu količinu isparljivih organskih rastvarača.
Istraživanja u ovom radu usmerena su na vodene dvokomponentne poliuretanske
sisteme, formirane sa specijalno razvijenim hidroksifunkcionalnim disperzijama
i poliizocijanatima, koji mogu da se emulguju vodom. Ovde se govori o hemiji
ovih sistema u svetlu njihove relevantnosti prema tehničkoj primeni na
pr. pot-life, razvoj mehaničkog integriteta filma sa ciljem postizanja
što veće postojanosti u teškim uslovima eksploatacije.
