Wood coatings cross-linking agent

Wood coatings cross-linking agent, compound wood coatings are faced with the problem of existing resin is diversity and its different applications in the industry. Find the best wood coatings (1 k) with single component waterborne polyurethane resin is the key to thorough understanding of two elements: the performance of the resin itself and evaluation standard of certain terminal market.

These two elements are closely linked, so in order to solve this dilemma, they must be considered together, cannot be considered separately.

Material science researchers will company of single component waterborne polyurethane (1 k) technology and classify the different USES of important performance formula so that the designer of resin and the applicability in the special purpose of wood coatings have a general understanding. The overall results are given in this paper, in order to make wood coatings resin screening process more smooth.

The type of polyurethane dispersions (PUDs). Polyurethane dispersions with main ingredients or building groups: polyether and polyester and polycarbonate. Sometimes, with two types of main ingredients with the preparation of polyurethane dispersions. It may include the advantages and disadvantages of each kind of components.

There are some self crosslinking polyurethane dispersions. After these dispersions contain trigger can crosslinking chain segments. Some types of the cross-linked materials containing fatty acid chain segments, this will make them as time goes by and oxidation of curing.

Wood coatings market an important test

In the preliminary understanding the performance of different types of polyurethane dispersions are usually show after combination, need to know what are the important test to determine whether the resin is most suited to different terminal wood coatings market. Usually the experiment was carried out as follows:

Low drying time;

Low surface hardness (rocker hardness);

Low Taber abrasion test to determine the scratch and abrasion resistance (CS - 10 emery wheel, the weight of 1000 r / 1000 g).

Low resistance to chemical medium (water and ethanol/water, acetone, the formula 409);

Low resistance to black heel impressions (BHMR);

Low outdoor durability.




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).


Does not contain solvent polyurethane dispersions

In deciding which test is very important for wood coatings market, the researchers of various without solvent polyurethane dispersions of these tests have been carried out. Table 2 is the matrix, the researchers developed lists how the polyurethane dispersions presented above experiment was carried out.

Although these are not including solvent polyurethane dispersions, but need to take the cosolvent, they can help the film at room temperature. Including resin UHXP4 is a unique material, it does not require cosolvent. Therefore, with its mixture of the VOC content products is low (less than 50 g/L), it this is very attractive for some terminal markets.

However, it is important to remember that UHXP4 solidifying material is a kind of oxidation, so need to drier or catalyst to promote oxidation mechanism of curing. This kind of catalyst usually contains a certain metals, such as cobalt, of course update more environmentally friendly materials, such as iron material, also can use.

Needs assessment is another important aspect of end USES. Such as wear resistance - may be very important for the floor, but for the cabinet may not be so. Given this, the researchers are also beginning to consider several different applications: floors, cabinets, furniture, interior Windows and doors, and outdoor furniture, in an effort to help designers to choose the most suitable resin formula.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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