Oligomers with imidazolidinetrione elements of the structure obtained from parabanic acid and urea

The paper is a review of the literature, including studies carried out with involvement of the author, con- cerning the high thermal stability of products formed by ring-opening of parabanic acid. A significant advantage of discussed reactions is that environmentally friendly alkylene carbonates have been applied as hydroxyalkylating agents. The cited results of structure and properties investigations of the products of urea and parabanic acid reac- tion with alkylene carbonates prove that the presence of carbamic groups has an impact on their high thermal stabi- lity.