The film-forming substance cannot be dissolved alone in the paint, but the volatile liquid used to dilute the ready-made film-forming substance solution is called a diluent. During paint construction, it is often used to adjust paint viscosity and clean construction tools and equipment.
All three solvents, co-solvents and diluents can be used as diluents. Sometimes only one or two of them need to be added to a paint to achieve the purpose of dilution, and the effect of the same substance on different paints is not necessarily the same. For example, xylene is a solvent in alkyd paint, but it is only a thinner in nitro paint. The use of these three agents has a common purpose, which is to dilute the paint to achieve a suitable viscosity and facilitate construction.
Which diluent to use should be determined according to the nature of the main film-forming substances contained in the paint. Oil-based paint generally uses No. 200 solvent gasoline or turpentine. If the resin content in the paint is high, some xylene should be added. General alkyd paint with long oil can use No. 2oo solvent gasoline; medium oil can use No. 200 solvent gasoline and xylene as a mixed diluent mixed at 1:1; short oil can use xylene; nitro paint can use banana water ;Amino paint generally uses a mixed solution of butanol and xylene or butanol, xylene, and butyl acetate as a diluent; asphalt paint mostly uses 200 No. coal tar solvent, 200 No. solvent gasoline, and xylene; Add a small amount of kerosene to improve leveling; the thinner of epoxy resin paint is a mixed solvent of cyclohexanone, butanol and xylene; the thinner of perchlorethylene paint is a mixture of butyl acetate, acetone, toluene, and cyclohexanone Solvent; The mixed solution of anhydrous xylene, anhydrous cyclohexanone and anhydrous butyl acetate can be used as diluent for polyurethane paint. In addition, there are special thinners for thinning paint in the store, which can be purchased according to needs.
Commonly used lacquer thinners include No. 200 solvent gasoline, turpentine, and xylene, followed by gasoline, kerosene (a little) and more than 95% ethanol, etc., and the amount generally does not exceed 30% of the amount of raw lacquer.
