Aluminum slurry is a kind of from very fine flakes or silver garden shape aluminum single slurry treated by a special process of metal paint. Aluminum slurry though more security than aluminum, not easy to fire or explosion.But because of the containing aluminum particles, therefore, it should pay special attention when processing and using.
Aluminum slurry optical effect have a big difference due to the size of aluminum particles, aluminum particle size distribution and particle surface treatment methods . Because of the difference of its cutting-edge materials and processing technology, aluminum silver paste are very different in whiteness, shiny, trigger performance, metal performance, smoothness and other properties. That’s the reason why there are many kinds products. To meet the requirements of higher complexity, often requires have other different properties. Application of advanced surface treatment technology provides a variety of special properties of particles grade of products to meet these requirements.
Security deposit instructions
※ Stored in indoor sealed tank, temperature for 15 ~ 40 ℃. Avoid directly exposure under the sun, rain, or too high temperature.
※The storage temperature can not lower than 15 ℃ (when in the winter or the surrounding temperature is equal to or less than 10 ℃ should pay special attention to).
※Excessive turbulence vibration in transit,or under certain conditions will lead to component apart of the separation of aluminum and solvent. Therefore, avoid all means of high speed stirring in process, lest destroy the shape of silver strip.
Use skills
As a metallic pigment, aluminum silver paste can have different special effect when make coating from other ordinary paint ,those are some skills in using process briefly:
1: in order to achieve the most satisfactory effect, aluminum silver paste must be fully dispersed in the coating system, coating should be homogeneously state, won’t appear a fine grained. Aluminum flake was easily bent and broken, if under high speed stirring or other continuous rough machiningin in process of coating production , its geometric structure will be easily damaged, will appear coarse, dark color, covering force is reduced, and the metal moving etc. Bad phenomenon. So the high shear dispersion methods are adopted.
Suggestion: adopting distributed mode: to choose the proper solvent or a mixture of several kinds of solvent, with aluminum silver paste and the solvent ratio is the ratio of 1:1 and 1:2, adding solvent to aluminum silver paste, stir gently until smooth (about 10 to 20 minutes)..And join makings . Commonly used in production prior to aluminum silver paste with slow mixing solvent soak 30 minutes.
2: Aluminum silver paste diluted selection is mainly determined by formula of paint. The float type aluminum silver paste can be widely used in polar and nonpolar solvents, such as aliphatic and aromatic hydrocarbon, lipids (such as acetic acid butyl ester), ketone (such as methyl ethyl ketone, methyl isobutyl ketone), alcohols (e.g., ethanol).
3: chlorinated solvents (halogenated...). Should not be used for any aluminum silver paste paint. Chlorinated solvents can release HCL, react with subtle aluminum pigments.
4: many commonly used such as oily coating finishing varnish makings, dilute acid resin, alkyd, ring itch ester and water-based makings, can be used in the float type aluminum silver paste pigment. In general, any paint binders or solvent carrier as long as the solvent and aluminum silver paste compatibility, and aluminum silver paste will not cause chemical damage are appropriate.
Special note: aluminum is a kind of active metal, paint acid value should be controlled below 7.
5: when a coating system needs to add metal containing aluminum silver paste drier, for non floating aluminum silver paste, only will not react with aluminium scales on the surface of the fatty acids of drier can access, suggest that choose diamond, zircon, manganese drier.
6: add scale:
Colored primer aluminum silver paste to add 1% ~ 1%
Sterling silver color aluminum silver paste to add 4% ~ 4% of the primer
Single metallic finish aluminum silver paste to add 5% ~ 5%
Anticorrosive paint, canned, and coil coating aluminum silver paste to add 10% to 10%
7: coating surface is parallel to the orientation, for the best effects. Parallel directional difference causes a cloudy or diffuse reflection phenomenon. Flake pigment orientation related to the formulation and construction conditions. The volatilization of solvent contraction caused by wet film, the final pressure aluminum pigments to horizontal directional position. The higher the solvent content in the coating, this effect is stronger. This explains the phenomenon of flake pigment directional. Therefore, the optical properties of the low solids coating is better than a high solids coatings.
Evaporation of the solvent will cause wet film inside strong vortex, but if the solvent evaporation too slow, can form the so-called na, spiral, block of aluminum pigments parallel directional (produce turbid phenomenon).
Can use resin to solvent evaporation (e.g., butyl acetate cellulose CAB), also has adopted some additives. They can be fixed flake paint. There are literature reports, be "interval effect", the wax disperse surfactants have similar functionality. But you should to test its function before use.
Note: in a certain range relative to the optical properties of the low solids coating is better than relatively high solid coatings.
