Amino resin coating cross-linking agent

Amino resin coating cross-linking agent, amino resin, melamine - formaldehyde, benzene, generation of melamine formaldehyde and urea formaldehyde resin (urine aldehyde)) in the main role of thermosetting coating, will be the main film-forming material, through chemical reaction got behind in a three-dimensional (3 d) mesh structure.

The structure of the mesh is formed by the amino resin and film forming material molecules on the reaction of functional groups, and other amino resin molecules at the same time polycondensation reaction. Amino resin easily with para hydroxy, carboxyl, hydroxyl and amide group in the polymer, so amino resins usually used to acrylic, polyester, alkyd, or epoxy resin based paint system.

Amino resin is used in polyurethane system, as paint additives to improve comprehensive performance of coating for certain USES.

The principle of amino resin:

The importance of amino resin in the lacquer that bake, far more than its proportion of occupied in the coating. Learn how to use the chemical properties of amino resin to design the coating formula has become increasingly important. Coating formulation, for example, the designer for some not satisfied with the performance of the coating, can through the following method to adjust:

1, the improvement of the film-forming resin itself or to choose;

2, the choice of amino resin (methyl ether or butyl ether, and the choice of etherification degree, etc.);

3, the collocation of film-forming resin and amino resin.

4, the selection of catalyst (with and without, or how much.

Article 4 in addition to article 1 are associated with amino resin, amino resin and performance depends on its functional group and its active, so understanding the structure of amino resin is very important. But first before understanding of amino resin, match with amino resin to have a preliminary understanding of the body of the resin.




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).


Mentioned earlier amino resin primarily with alkyd resin, acrylic resin, polyester resin, epoxy resin with use. Alkyd resin mainly by polyol and polybasic acid resin through esterification reaction synthesis, synthesis in the process of general alcohols are appropriate too much. Also there will be a part of polybasic acid carboxyl reaction not completely, so the resulting alkyd resin will contain a certain amount of carboxyl and hydroxyl groups. How many usually with carboxyl and hydroxyl groups characterized by the acid number and hydroxyl value.

Acid value is 1 g of solid resin with KOH titration and the number of milligrams of KOH required. Hydroxyl value refers to the 1 g Ozzie and Harriet into solid resin contains carboxyl using KOH titration and the number of milligrams of KOH required to completely. Similarly, polyester resin, acrylic resin, amino resin also contains a certain number of carboxyl and hydroxyl groups.

Just with the raw materials are used in synthetic resin, such as acrylic resin of carboxyl from acrylic acid, hydroxy from hydroxyl acrylic acid, the amount of amino resin containing carboxyl and hydroxyl groups is not the same. Acid value, hydroxyl value, viscosity is an important index of the resin, directly affect the performance of the resin.

A part of alkylated amino resin, which contains alkoxy, amino and hydroxyl methyl. If the six-member ring composed of carbon and nitrogen atoms as the skeleton, the derived portion of the frame or branch can image as superhuman powers. Amino resin performance, it is the difference of six "arms" and the intricate permutation and combination between them.

A very symmetrical HMMM structure that is full of methyl ether amino resin, the above is only one functional group: methoxyl group, this is ideal. As etherification degree in actual production is unlikely to be 1:6 (highest), therefore said there is always a bit of the methyl ether amino resins and the existence of amino and hydroxyl methyl.

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