Hydorxyl photolinker8/2/2023 ![]() ![]() And it is oil soluble, has good compatibility with carboxyl polyester. Although nitrogen molecules containing three atoms, but closed triazine ring, make it stability without the structure of oxidation. TGIC is through its three epoxy group and carboxyl polyester carboxyl and realize the crosslinking reaction, its reactivity is relatively small, there is no by-product in the process of reaction. To promote the hydroxyl alkyl amide (T105) you have to research its differences with TGIC. Objectively, TGIC and hydroxyl alkyl amide (T105), after all, are two different compounds, the reaction mechanism, reaction process is different, need to study the problem of hard to avoid can appear different in different solutions.Ĭhinese name: Diethyl toluene diamine(DETDA)Įthylene (Et) polymer grade, Shanghai production Appeared in the powder coatings industry and its many alternatives, in which performance is close to TGIC, affect the largest and the most widely application scope for hydroxyl alkyl amide (Primid XL552). Beta hydroxy alkyl amide application in powder coating test, the results show that the alternative to the traditional TGIC crosslinking agent.īecause of TGIC toxicity and harm to the environment, since the 1990 s, many countries have banned or restricted in the world for its application. To overcome these problems, we need to slow down the coating crosslinked speed, keep the coating under the condition of low melt viscosity for a long time, for the water molecules escape time.īeta hydroxy alkyl amide is polyester powder coating is a new kind of high efficient non-toxic crosslinking agent. For the coating thickness may cause pinhole and foaming. HAA as crosslinking agent is the chief drawback of preparation of powder coatings due to the release of water molecules crosslinking process, will affect the density of paint film. QM1260 XL552 relative molecular structure which is the only difference between the hydroxyl of carbon atoms on one more methyl groups, the existence of the steric hindrance effect may slightly reduce the activity of hydroxyl groups, but the crosslinking after the formation of ester groups can play a shielding effect, so as to improve its hydrolytic stability, inhibition film yellowing. Due to the reaction process can form mouth oxazoline salt intermediates, thus esterification reaction activity is very high, do not need to join the catalyst.įrom the toxicology Angle analysis, two kinds of HAA class crosslinking agent are completely safe. The crosslinking of HAA principle is to use the beta on hydroxyl alkyl esterification with resin on the carboxyl to dehydration reaction. ![]() Hydroxyl alkyl amide class coating crosslinking agent ,(Hydroxyl alkyl amide, HAA) TGIC is gradually substituted weathering powder coating the first major types of crosslinking agent, the main varieties have a Primid XL552 and Primid QM1260 two kinds. ![]()
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