4 октября, 2015 
Malyar (i) Polyaziridene*12^
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Two component coating systems based on the reaction between acrylics and multifunctional aziridenes, as shown in figure 7-16, have been used for many years. In general, crosslinking with polyaziridenes improves the blocking resistance, adhesion and chemical resistance of the coating. The formulations have long pot lives, up to 48hrs, and the coatings crosslink under low energy conditions. However, with the growing awareness of health and safety, many companies have reviewed their potential toxicity. The products are classified as skin and eye irritants, but the prime cause for concern is their mutagenicity<13).
Figure 7-16: Reaction of Polyaziridene with the Carboxyl Group
The order of reaction of the aziridene ring with active hydrogen is:
C02H > SH > OH > NH2
Опубликовано в рубрике 