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.