Introduction of auxiliaries

2021-11-03   Pageview:663

The amount of additives is very small, but it has a large impact on the VOc and formaldehyde content of the coating. Therefore, the additives in the formula must be in line with the premise of environmental indicators to choose a suitable amount, and strive to achieve effective uniform dispersion of the system of color and filler, so that it has a good open can, the coating is flat and smooth.

After the formation of the coating itself wall surface environment is not specific to mold growth conditions, such coatings resin base material cured paint film completely dense, does not adsorb moisture and nutrients in the air, the surface dries quickly, the surface can therefore play a good anti-mold anti-bacteria effect, such as water-based epoxy resin-based coatings. The paint protects the substrate from corrosion, mold, harmless to humans, while no pollution to the environment.












Acidolysis and displacement reaction
React with organic carboxylic acid (-CyH yO), Ti+nRC OOH(i CHO) .TicO OCR.+niGH OH
In the formula, R is an aliphatic or aromatic hydrocarbon group; n is not more than 3.
The acidolysis reaction of mono- or di-substituted is easy to proceed, and the reaction of tri-substitution is more difficult, and complicated side reactions often occur. The above reaction cannot prepare tetra-substituted (R COO) Ti.

If the acrylic resin contains carboxylic acid, it may react with the isopropoxy group in the titanate. Titanium tetraisopropoxide and a chelate compound containing titanium bis-isopropoxide can be used as room temperature curing agents to crosslink and cure the resin.

React with sulfonic acid
(i-CgH, O): Ti+nR SO, H—(i CgH, O) 4-nTi(OSO zR), +ni-CgH, OH In the formula, wax emulsion cas number R is an aliphatic or aromatic hydrocarbon group; n is not greater than 3. The reaction with organic carboxylic acid is basically similar.
Reacts with mineral acids
The number of R’carbon atoms is more than that of R carbon atoms, and the reaction can proceed. This type of reaction is a reversible reaction. Relative stability comparison (such as the product OC OR-TiO-OC OR J. is conducive to the above reaction) and titanate OC ORTiO-OC OR is more stable than the original reagent OC OR-TiO-, so the above reaction is easier to proceed).


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