Research of the influence of quantitative content and type of hardener on the properties of water-emulsion varnishes of domestic production

Abstract

In recent years, water-soluble, water-emulsion and other relatively environmentally friendly materials have become widespread. In the manufacture of products in enterprises, the consumer is less interested in the type of finishing material, but there is a direction associated with the finishing processes that directly affect the final consumer. This direction is the equipment of wooden floor coverings. Since most of these floor coverings are installed without finishing, they need further finishing directly on the installation site. Therefore, in order to reduce the negative impact on the health of the consumer, finishing works are carried out with acrylic, acrylic-polyurethane or polyurethane water-emulsion materials. Since the coatings formed by acrylic emulsions have low resistance to abrasion and water, they are mostly used for the manufacture of primers. Polyurethane or polyurethane-acrylic emulsions are used to make high-quality varnishes. It should be noted that in order to ensure high performance indicators, preference is given to two-component compositions which include a varnish-base and an isocyanate hardener. Most of the raw materials for manufacturing of two-component water-emulsion polyurethane varnishes are imported and quite expensive. Therefore, the urgent task is to establish the optimal ratio between its components. This is necessary to obtain cost-effective materials that will form h
 In recent years, water-soluble, water-emulsion and other relatively environmentally friendly materials have become widespread. In the manufacture of products in enterprises, the consumer is less interested in the type of finishing material, but there is a direction associated with the finishing processes that directly affect the final consumer. This direction is the equipment of wooden floor coverings. Since most of these floor coverings are installed without finishing, they need further finishing directly on the installation site. Therefore, in order to reduce the negative impact on the health of the consumer, finishing works are carried out with acrylic, acrylic-polyurethane or polyurethane water-emulsion materials. Since the coatings formed by acrylic emulsions have low resistance to abrasion and water, they are mostly used for the manufacture of primers. Polyurethane or polyurethane-acrylic emulsions are used to make high-quality varnishes. It should be noted that in order to ensure high performance indicators, preference is given to two-component compositions which include a varnish-base and an isocyanate hardener. Most of the raw materials for manufacturing of two-component water-emulsion polyurethane varnishes are imported and quite expensive. Therefore, the urgent task is to establish the optimal ratio between its components. This is necessary to obtain cost-effective materials that will form high-quality coatings. So, this paper presents the results of the first stage of research on the properties of two-component water-emulsion polyurethane varnishes, which are being developed by one of the Ukrainian enterprise. The results of research of hardness of the protective and decorative coverings formed by varnishes on the basis of polyurethane emulsions with addition of isocyanate hardeners are resulted. The dependence of technological parameters of varnish application on the type and quantitative content of isocyanate hardener is described.
 igh-quality coatings. So, this paper presents the results of the first stage of research on the properties of two-component water-emulsion polyurethane varnishes, which are being developed by one of the Ukrainian enterprise. The results of research of hardness of the protective and decorative coverings formed by varnishes on the basis of polyurethane emulsions with addition of isocyanate hardeners are resulted. The dependence of technological parameters of varnish application on the type and quantitative content of isocyanate hardener is described.