Powder coating of the crosslinking agent

This article mainly introduced: Powder coating of the crosslinking agent.

Crosslinking agent used thermosetting powder coating is an important component of the powder coating. For paint it will influence the production, storage and application, such as extrusion temperature, crosslinking time, crosslinking temperature and the flow property, impact resistance and hardness, storage stability, weather resistance, chemical resistance and so on.

Sometimes it is difficult to distinguish between crosslinking agent and resin, because this two ingredients ultimately form a complete system of three dimensional network structure. Often think small number in the system and to participate in the crosslinking reaction of low molecular weight compounds as crosslinking agent.

But for some things, such as polyester/epoxy hybrid, especially 50:50 system, there is what is a crosslinking agent and what is the problem that resin,.

So how bisphenol A epoxy resin and carboxylic acid polyester crosslinking agent of classification depends on the individual's hobby, or just say we epoxy/polyester powder coating is to choose matching epoxy resin and polyester resin crosslinking, epoxy and polyester as crosslinking agent, the crosslinking reaction is composed of epoxy resin of carboxyl pay couplet of epoxy resin and polyester resin membrane.

As crosslinking agent of powder coating, should possess the following conditions:

(1) in normal temperature is solid powder, granular or thin sheet, and have high glass transition temperature;

(2) requires good latent at room temperature, under high temperature has good and chemical reaction activity of resin, other additives and fillers, don't react;

(3) basic without excitant and toxicity of compound powder coating after basic non-toxic, conform to the relevant environmental protection safety standards;

(4) from energy saving point of view, can rapidly and resins under the low temperature crosslinking form satisfactory coating;

(5) crosslinking agent should be colorless or light color, can't make the coating color;

(6) good stability, convenient for storage and use; (7) and a resin system has a good compatibility.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).


The types of thermosetting powder coating

1, thermosetting polyester powder coatings

Thermosetting polyester powder coating of its unique properties in weather resistance, resistance to ultraviolet optical performance is better than epoxy resin. Because the polyester resin with polar group, so the powder rate higher than epoxy resin, baking process not easy yellowing, high gloss, good flowing property, thick paint membrane, shallow features such as color, thus has the very good adornment sex. More commonly used in refrigerators, washing machines, vacuum cleaners, instrument shell, bicycle, furniture and other fields.

2, thermosetting epoxy powder coating

Thermosetting epoxy powder coating of epoxy resin, crosslinking agent, pigments, fillers and other additives, is the earliest development of varieties of thermosetting powder coating, bonding strength, excellent and metal corrosion resistence, hardness, flexibility and impact strength, widely used in all walks of life.

3, thermosetting polyurethane type powder coatings

The coating with a strong decorative, daub is smooth, leathery, both outdoor weathering and corrosion is one of the best varieties of powder coatings in the current domestic weatherability.

4, thermosetting epoxy polyester powder coating

With carboxyl polyester resin and epoxy resin as basic material, combined with paint, fill the composition such as adjuvant processed thermosetting epoxy polyester powder coating, is currently the most widely use in the world, yield the largest varieties of powder coatings.

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