| abstract |
The present invention includes a process for the preparation of flame retardants, wherein dicyandiamide, mono-, diammonophosphate and formaldehyde in a molar ratio of 1: 1.0 to 1.7: 0.03 to 0.4: 2.2 to 3.2 at least 1, Heated to at least 95 ° C for 5 hours and a pH of at least 3.8 is established. The flame retardants obtained in this way are stable in storage and have good compatibility with polyacrylate dispersions. If the flame retardants are used as such or together with polyacrylates in the usual way, it is particularly noteworthy that, even after subsequent use of higher temperatures, practically no heat yellowing can be observed. |