COLLAGEN-CONTAINING NITROGEN–BORON FIRE-RETARDANT COMPOSITION FOR NATURAL LEATHER
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Most substances used for the final finishing of natural leather significantly increase its flammability. However, for the use of leather materials in the automotive, furniture, and light industries, it is important to impart flame-retardant properties to them. Due to the toxicity of traditional halogen-containing flame retardants, particular interest is given to the use of halogen-free nitrogen-, boron-, and phosphorus-containing fire-retardant compositions. To address this issue, a composition based on collagen and polyacrylamide, characterized by a high nitrogen content, with the addition of boron-containing compounds, was used in this study. Samples of finished natural leather and suede splits were treated with this composition. The fire-retardant and morphological properties of the samples were investigated. The obtained results showed a reduction in the flame propagation rate of materials treated with the nitrogen–boron-containing composition. Surface structure analysis confirmed the formation of a film coating.
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