Bakelite varnishes - solutions is an alcohol-based resin made using phenol formaldehyde condensation.
The catalyst in a chemical reaction in this case is ammonia, which gives a peculiar odor lacquers.
Bakelite varnishes used for coatinga variety of surfaces, their main purpose - is to protect the equipment from the influence agre6ssivnoy industrial water, weak and strong acids. Also, these paints are used for painting gas tanks and as binding agents for laminates. In contrast to many analogues, bakelite varnish can be used to impregnate and even gluing pieces of products from highly adhesive materials.
Production of varnish
For the preparation of bakelite lacquer usedphenol, formalin, ammonia water and ethanol. Phenol - an organic compound which dissolves completely in water and solidifies at a temperature above 40 ° C. Formalin - clear liquid with a low degree of reactivity, phenol is considered poison. Ammonia water - is a 20% aqueous ammonia. Ethyl alcohol or ethanol - a colorless thin liquid, distillate carbonaceous products. The result is a clear solution, which may be to have a red or brown shade.
The shelf life of the varnish should not exceed three months from the date of its manufacture.
Types of coatings
Bakelite varnishes come in different varieties:
- LBS-1 and LBS-2 (the highest grade)
- LBS 20 and LBS-29.
Depending on the brand of the percentage variesthe content of the above substances in bakelite lacquer. As a result, it changes its properties and functions. For example, 4-LBS lacquer used to produce plastics with mineral fillers, and SBS-1 for the production of wood-plastic and plywood.
The main objective of bakelite lacquer iscreate a thin protective film, which may consist of inorganic and organic polymers. Such a film does not change the color of the surface roughness of hides and prevents the penetration of moisture into the product. The peculiarity of this varnish is a vegetable oil, included in its composition. Also in the varnish include cellulose bakelite, which is pre-processed.
Properties bakelite lacquer does not change if it add dye, so it's easy to find the right color nail polish.
Using bakelite varnish at homeconditions complicated by the fact that after the application of lacquer on a clean and dry surface it must be heat treated, gradually increasing the temperature to 160C. Eventually (after 20 seconds), a polymer film, which will last a long time if the ambient temperature is above 20 ° C, and will be excluded direct influence of sunlight.