Application of solvent-based oily color paste and color matching method of paint color paste
Solvent-based oil-based universal colorants generally use synthetic resins as carriers, such as aldehyde and ketone resins, acrylic resins, etc. There are also some systems without resins or similar plasticizers.
Pay attention to the following points when choosing a universal color paste:
1. Whether adding a certain concentration will affect the gloss.
2. Whether it has an impact on compatibility, such as pigment flocculation, and solvents cannot be miscible. Does the solvent in the paint have any side effects on the resin of the universal colorant? For example, aldehyde and ketone resins are not very good due to alcohol resistance and so on.
3. Does it affect the viscosity? Some varieties require higher viscosity. Such as nitro paint. Whether it has a significant effect on viscosity.
4. Whether the temperature resistance is achieved, or whether the yellowing resistance is reliable.
5. Since aldehyde and ketone resins are not very good in aldehyde resistance, they are generally not recommended for paints used in alcohol resistance tests, such as some special wood paints, plastic paints, etc.
6. The poor temperature resistance of aldehyde and ketone resin also limits its application. For example, some baking paints (drying temperature > 150 degrees) should be tested for its film-forming performance and yellowing resistance of solvent-based coatings. Effect of degeneration.
Solvent-based paints mostly use primary paint as the main color and color paste as the auxiliary method. Why?
1. There are many kinds of environmentally friendly resins and solvents used in solvent-based coatings, and the cost pressure is also relatively high, and the requirements for gloss and other aspects are much higher than those of non-toxic coatings. Therefore, the color matching of general solvent-based coatings mainly uses Mainly primary color paint, adding some general-purpose colorants for coloring.
2. Solvent-based architectural exterior wall coatings generally use acrylic resin as the film-forming substance, use a large amount of fillers and some titanium dioxide as aggregates, and the color is mostly light, which is a special category.
