Abstract
Polyurea is a synthetic material made by the reaction of isocyanate and polymer blend-containing amines. Due to its outstanding mechanical properties and fast curing, polyurea-based coatings have found dozens of applications, including waterproofing and anti-corrosion coatings. Further development of this material can create a flame-retardant product, a good alternative for common products available on the market, such as intumescent coatings. To improve the flame retardancy of polyurea, several flame retardants were investigated. The influence of aluminum hydroxide, resorcinol bis(diphenyl phosphate) (RDP), and tris chloropropyl phosphate (TCPP) on flame retardancy and morphology was studied. The following methods were used: infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, limiting oxygen index, and tensile strength. The examinations mentioned above showed the improvement of flame-retardancy of polyurea for two products: chlorinated organophosphate and organophosphate. Nevertheless, using the chlorinated organophosphate additive caused a rapid deterioration of mechanical properties.
Highlights
This section describes the influence of flame retardants on the chemical, physical, and thermal properties of polyurea-based coatings compared with a standard recipe without
The addition of resorcinol bis(diphenyl phosphate), as shown in Figure 4, formed new bands: at 962 cm−1 attributed to PO single bond, and at 1186 cm−1 related to the P-O-Ar group
The addition of resorcinol bis(diphenyl phosphate), as shown in Figure 4, formed new bands: at 962 cm−1 attributed to PO single bond, and at 1186 cm−1 related to the P-OAr group
Summary
Fire resistance is one of the most challenging issues raised in the building design process Building elements such as roofs or steel constructions are in the greatest danger when exposed to fire. Time to ignition for such elements may be extremely short, often less than 1 min [1]. Steel, being generally a fire-resistant material, may become a great danger when the fire is fully developed. This problem is often described in the literature [2,3,4]. At a temperature over 600 ◦ C, steel loses two-thirds of its yield strength
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