Powder coating crosslinking agent

Powder coating crosslinking agent, first make clear the basic parts of a powder coating.

The structure of the powder coating, resin and curing agent (also known as the crosslinking agent), pigments, fillers, additives (additive). In particular, curing agent is an important component of the powder coating. For paint it will influence the production, storage and application, such as extrusion temperature, curing time and curing temperature, flow property, impact resistance and hardness, storage stability, weather resistance, chemical resistance and so on.

But sometimes it's hard to distinguish between curing agent and resin (TGIC, PT910 belongs to curing agent), because the two ingredients eventually form a complete system of three dimensional network structure. Often think small number in the system and to participate in the curing reaction of low molecular weight compounds as curing agent.

But for some things, such as polyester/epoxy hybrid, especially 50:50 system, there is what is a curing agent and what is the issue of resin. Therefore depends on the individual hobby for curing agent of classification.

According to the collected data, used the powder coating resin and curing agent is divided into:

A, pure epoxy - used for interior decoration or functional powder coating, such as PZ660, PZ770, etc

B, epoxy - polyester - main products of the type of powder coating. Also called Hybrid epoxy polyester powder coating powder coating (corresponding to epoxy and Hybrid), using epoxy resin and polyester resin as the main raw material preparation, has the unique properties of both at the same time, make produce coating has the extremely good flow property, decoration, mechanical properties and strong corrosion resistance, wide application in all kinds of indoor coating of metal products. Epoxy/polyester blended mix powder coating is a kind of non-toxic products.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine Uses:

The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.


C, pure polyester, divided with TGIC and need not TGIC cure two types, used for outdoor decoration and protection, used for outdoor, such as air conditioners, furniture, aluminum, etc.

TGIC is a kind of widely used crosslinking agent of powder coating, but its effect on human skin and sensitive, it can also cause germ cell mutation though on May 1, 2011, China will also rules of TGIC product labeling for toxic material, but also China is clearly visible in figure is still very high in the proportion of powder coating.

Powder coatings manufacturers in mainland China does not have the reason of extensive use of HAA HAA curing coating surface gloss is not TGIC system is high, and should not be thick coating, HAA anti-stress TGIC good yellow at the same time, so many countries, including the United States still use TGIC, therefore it is still not quit the stage.

HAA (beta hydroxy alkyl amide) is a widely used in the world of pure polyester powder coating system curing agent. HAA coating application represented by Europe (the proportion of Europe and Australia is very high, maybe it's because the government of particularly high requirements of environmental protection and public environmental awareness), Europe has shut down all the factories, the production of TGIC USES non-toxic HAA.

According to the Chinese chemical society paint coating professional committee of statistical data, 2004 varieties of powder coating structure in our country, polyester - TGIC system accounted for 17%, 4% polyester - HAA system; Polyester - TGIC system accounted for 23% in 2005; Polyester - HAA system accounted for 4%; Polyester - TGIC system accounted for 27% in 2006; Polyester - HAA system accounted for 6%. Visible, in the present China's powder coating market, the market share of TGIC far outweigh the HAA.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

Diethyl toluene diamine(DETDA)  http://www.yaruichem.com