Water-based paint general-purpose wetting agent use method

2021-10-02   Pageview:369

-PM-WET100 is recommended to be added at 0.1-0.3% of the total mass of the paint when making emulsion paints.
-In general, the amount of inorganic pigment is 1-5%, organic pigment is 10-30% and carbon black pigment is more than 30%.
-Please add slowly into the preparation paint so that it can improve the color mixing to eliminate the floating color caused by the migration of emulsifier.
-It is an easy to handle liquid at room temperature and will solidify below 5°C. Heating it to 30-40°C will make it easy to use without affecting its performance.

 

 

 

 

 

 

 

 

 

 

 

 

 

Metals with drier properties must be in an “active state” to play their role in drier. If the diamond, manganese, lead and other variable metals are dispersed in the oil in a colloidal state, there will be no drying effect. For example, tetraethyl lead [Pb(CgH;) is well miscible in oil, but still has no drying effect. Therefore, metals with drier properties must form metal soaps and dissolve in the oil. The organic acid acts as an anion, and the metal part is a cation, in order to exhibit the drier effect.

1. The anionic part of the drier-organic acid
The organic acid of the drier determines the solubility and compatibility of the metal soap in the coating. Although the organic acids in the driers are not the same, they have the same drying characteristics. For example, lead naphthenate and lead linoleate are mainly based on the bottom drying, but linoleic acid soap reduces its solubility due to its poor solubility. Dry activity. There are many types of organic acids, but the organic acids used in driers must meet the following conditions.

①The formed metal soap has good solubility in the binder and organic solvents. The greater the unsaturation of the organic acid, the better the solubility of the metal soap. For example, the solubility of linoleic acid soap is better than that of stearic acid soap.

The suitable chain length of saturated organic acid is 6-10 carbons, and the carbon chain has side chains, especially the branched chain on the a carbon, which has better solubility. For example, the metal soap of 2-ethylhexanoic acid is better than normal The solubility of caprylic acid metal soap is better.
②Small solubility in water. The metal soap of benzoic acid has good solubility in organic solvents, light color, low price, and high acid value, but it is sensitive to water and affects the water resistance of the paint film.
③Good storage, not easy to be oxidized and decomposed. Unsaturated fatty acids such as rosin acid and linoleic acid are oxidized during storage, which causes the color to darken and the solubility to decrease and precipitate, which affects its drying ability.

Metal soaps of saturated organic acids such as naphthenic acid, 2-ethylhexanoic acid, montan glycol wax msds neodecanoic acid and isononanoic acid have excellent storage stability.

④The color is light, the smell is small and the impurities are few. Dark metal soaps should not be used for light-colored paint, so as not to affect its color, so the organic acid used needs to be refined. Naphthenic acid soap has a special odor and is not suitable for coatings for the food industry. Organic acids must not contain harmful substances such as sulfides that affect the coating film. Synthetic fatty acids such as 2-ethylhexanoic acid and neodecanoic acid have high purity and extremely light color, and no special odor.

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