The Use Of Solvents In The Painting Works

In a wide range of solvents for paints and varnishes best known is the solvent 646 (P-646). Anyone who has ever had to deal with the painting works, is familiar with the solvent 646. Formulation and technology its production have been developed in the XX century. At first he made for dilution and nitro lacquer nitroenamels, but later it became clear his versatility. Solvent 646 was used for the dilution of various coatings to a viscosity, clean paint equipment and tools. The popularity of the solvent due to its excellent 646 operating properties. Many components in its composition, determine the broad specialization and the ability to dissolve many organic substances.

Solvent 646 – a colorless or slightly yellowish liquid, having a specific scent. The chemical composition are present: cellosolve, butanol, toluene, ethanol, butyl acetate, acetone. Solvent 646 – one of the most active solvents, so it requires accuracy in work, for example, to avoid damaging the bottom layer of paint. In some cases, better to use the weaker part of the combined solvents. Solvent 646 is used for dilution as nitroenamels (eg, enamel NTs-132) and nitro lacquer, and for the epoxy and glyptal (for example, primers GF-021), although the latter would be more correct to use solvents, 649, 650, or solvent. After drying, the paint due to the solvent gets extra sparkle. During painting work is necessary to bring the paints to a viscosity that is diluted.

For this purpose, different solvents and thinners paints. Solvents applied in the manufacture of paints and varnishes. Low molecular weight solvents called volatile liquids with low boiling points. Strong solvent is a solvent with which this macromolecular material (film former) creates a uniform system at all concentrations and temperatures. In the case of film-forming sediment formation when the temperature or the concentration of solvent considered weak. Thinners – solvents that are not soluble high-molecular substance, but does not destroy its structure. In real life, often used a solvent mixture, the so-called license solvents. A well-known solvent R-4 – a mixture of solvents containing toluene and acetone. Solvent R-4 is most suitable for dissolution and dilution of alkyd paints (enamel PF-115, GF-021 primer) or enamels HV and cholesterol. For these materials are suitable and pure toluene or xylene. The solvent used to dissolve 649 film formers, intended for dilution to a viscosity grade enamels NC-132K. The solvent used to dissolve 650 film formers, intended for dilution to a viscosity grade enamels NC-11 for touch up small areas of brush. P – 4 is used for dilution perchlorovinyl, polyacrylate, epoxy and other coatings. R – 4 A – Dilution perchlorovinyl, polyacrylate, epoxy and other coatings. P – 5 A – Dilution perchlorovinyl, polyacrylate, epoxy and other coatings. P – 60 is used for thinning enamel VL – 515. P – 7 – to dilute the paint OL – 51. RCH – 2 – to dilute the paint MCH – 52 and for the production of acid cure for nail MCH – 52. RML -315 – to dilute the varnish NC – 223. Water paints must be thinned with water only. In this case the water must be added slowly and in very small quantities. Addition of water in an amount 5% leads to a decrease in viscosity by half.