The Effect of Rosin Content on the Running Ability of Oil-Based Coating Materials

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UDС

674.684.05

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Abstract

The right selection of paint-and-lacquer materials is an important task for manufacturers in the process of wood finishing. Modern market of paint-and-lacquer products has a wide assortment of materials. Рresent conditions of quality products demand not only top-notch physical, mechanical and decorative properties, but also ecological or environmentally-friendly properties. Recently, in addition to the water-soluble and with minimum percentage organic solvent paint-and-lacquer materials, local and foreign companies began to offer oil composite materials. It is known that their drying is time consuming (over 24 hours) and their protective film has reduced hardness.  In order to reduce the film-forming time in oil paint-and-lacquer materials and increase the hardness of protective-decorative coatings, it is needed to create modified oil-based composite materials. The most prevailing modifiers for oil paint-and-lacquer materials are desiccants.  Desiccants reduce the film-forming time, but don’t significantly improve the hardness of a coating. A rosin-based modifier is proposed to be incorporated into oil composites with the purpose of coating hardness improvement. Quantitative content of modifiers in oil materials for wood finishing has been determined. The study of impacts of modifier content on reduction in drying time and increase of hardness of oil composite materials is proposed. The results of experimental study of impacts of modifiers on the drying of oil composite coatings show that incorporation of a rosin and a desiccant leads to shorter film-forming time and increase the hardness of protective and decorative wood coating. A rosin, as a modifier improves qualitative indicators of oil-based paint-and-lacquer materials.

Authors

L.A. Yaremchuk, Candidate of Engineering, Associate Professor

Ukrainian National Forestry University

Chuprynki, 103, Lvov, 79057, Ukraine, е-mail: tf_nltu@ukr.net

Affiliation

Ukrainian National Forestry University

Keywords

wood, oil, modification, rosin, desiccant, hardness, drying.

References

1. GOST 19007-73 Materialy lakokrasochnye. Metod opredeleniya vremeni i stepeni vysykhaniya [State Standard 19007-73. Paintwork Materials. Method of Determining of the Time and the Degree of Drying]. 2. GOST 7931-76 Olifa natural'naya. Tekhnicheskie usloviya [State Standard 7931-76. Natural Drying Oil. Technical Conditions]. 3. Karyakina M.I., Poptsov V.E. Tekhnologiya polimernykh pokrytiy [Technology of Polymeric Coatings]. Moscow, 1983. 336 p. 4. Livshchits R.M., Dombrovskiy L.A. Zameniteli rastitel'nykh masel v lakokrasochnoy promyshlennosti [Substitutes of Vegetable Oils in the Paint and Varnish Industry]. Moscow, 1987. 160 p. 5. Orlova O.V., Fomicheva T.N. Tekhnologiya lakov i krasok [Technology of Varnishes and Paints]. Moscow, 1990. 384 p.