Fire retardant-antiseptic

 

(57) Abstract:

Usage: the invention is intended for impregnation of wood, fabrics and products from them to reduce their Flammability, and also as a preservative cellulose products and can be used in civil and industrial construction, repair work, for impregnation of technical fabrics and fabrics for household purposes in the textile industry. The invention: the creation of a flame retardant-antiseptic-based fosforsodyerzhascikh connection with a broad spectrum of action, simple in composition, technology of preparation and use, environmentally safe, does not release toxic substances during the synthesis, the production of works for the impregnation and treatment of materials, as well as reducing the hazard class of thermooxidative decomposition (burning) of the treated material. Fire retardant-antiseptic made on the basis of fosforsodyerzhascikh connection. What is new is the composition of the reaction products of phosphorous acid and an aqueous solution of ammonia 3 - 25%, taken in a volumetric ratio of 1:1-7. table 2.

The invention is intended for impregnation of wood, fabrics and products from them to reduce their Flammability, as well as in to the as, when repair work, for impregnation of technical fabrics and fabrics for household purposes in the textile industry.

You know the joint application of flame retardant based on phosphorus compounds with urea-formaldehyde precondensation with bromine-containing flame retardants for mixed fabrics made of natural fibers. Making flame retardant properties of blended fabrics made of natural fibers (L. I. Tablescan and other proceedings of III all-Union conference "State and prospects of development of flame retardants", Cherkassy, 1985, S. 63).

Also known composition for protecting wood against fire and biodegradation on the basis of organophosphorus flame retardants (RF patent N 2061589, class B 27 K 3/34, 1996, patent RF N 2119931, CL 09 D 5/18, 1998).

Known flame using flame retardant composition of phosphoric acid, aqueous ammonia and urea (Fire protection of building structures. I., Romanenkov, F. A. Livanis, M.: stroiizdat, 1991, S. 320, Il.) the prototype.

However, all of these flame retardants detect toxic properties not only in the process of decomposition during combustion, but also in the synthesis of flame retardants in the production of the work, which limits their practical application.

The task is solved in that the flame retardant-antiseptic-based fosforsodyerzhascikh connection consists of the reaction products of phosphorous acid (H3PO3)and an aqueous solution of ammonia (NH3)253...25% taken in a volumetric ratio of 1:1...7.

Physico-chemical characteristics are given in table 1.

The proposed flame retardant receive mechanical mixing of the components in different volume ratios depending on its purpose.

Toxicological-hygienic studies of the flame retardant is an antiseptic effect on the human body and the environment was made in accordance with the methods of the Ministry of health at the Institute of toxicology, Saint-Petersburg. Studies have shown that unteren antiseptic low toxicity, has no irritant effect on the skin and skin-resorbtive action, slightly irritating to eyes and upper respiratory tract. Not oblyzyvaet remote adverse effects. The degree of impact on the body belongs to class IV hazardous substance (GOST 12.1007-76). Environmentally safe, does not require special disposal in the environment breaks down into non-toxic components.

The toxicity index of the products of combustion of the materials impregnated with fire-retardant additive antiseptic, determined in accordance with GOST 12.1.049-89 "explosion safety of substances and materials. The range of indicators and methods of their determination".

The study was subjected samples of viscose fabric without flame retardant and impregnated with flame retardant-antiseptic. In accordance with the scale of the conditional toxicity (GOST 12.1.044-89) rayon fabrics, not impregnated with the flame retardant, classified as highly toxic. Viscose fabric impregnated with a flame retardant-antiseptic, on the same scale applies to moderately hazardous.

Fungicidal activity was determined by the method described in GOST 9.048-75. ..9.050-075 "Product. Test methods". For tests were used pine wood samples, priuchennye at 80oC to constant weight. They were then soaked proposed flame-antiseptic, in various concentrations by immersion in the solution, then you were the crops. The tests were carried out for 84 days.

The fire retardant properties of the composition was determined according to GOST 12.1.044-89 "explosion safety of substances and materials. The nomenclature and methods of their determination".

Examples of the flame retardant is an antiseptic, as well as the results of the tests are shown in table 2, show that the flame retardant antiseptic imparts flame retardant properties of the treated materials, this puts them in the category of combustible and gives pronounced fungicidal properties.

Fire retardant-antiseptic-based fosforsodyerzhascikh connection, characterized in that it comprises the reaction products of phosphorous acid and an aqueous solution of ammonia 3 - 25%, taken in a volumetric ratio of 1:1-7.

 

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