New Progress in the Application of Flame-Retardant Modified Epoxy Resins and Fire-Retardant Coatings

Abstract

Due to the enhancement of people’s environmental awareness, flame-retardant epoxy resin (EP) tends to be non-toxic, efficient, and multi-functional, and its development is systematic. At present, many new flame retardants or intrinsic modification methods reported in studies can effectively improve the flame retardability and thermal stability of EP. However, many aspects still need to be further improved. In this review, the flame-retardant mechanism and method of flame-retardant epoxy resins are briefly analyzed. The research progress of the flame-retardant modification of epoxy resin by physical addition and chemical reaction is summarized and discussed. Furthermore, the research trend of flame-retardant epoxy resin in the field of fire-protective coatings is discussed, and future problems in this field are put forward. This work may provide some new insights for the design of multi-functional integrated epoxy resin fireproof coatings.

Mechanical Properties of Epoxy Compounds Based on Unmodified Epoxy Resin Modified with Boric Acid as an Antiseptic

“…The tested filler contents were selected based on the data reported in the literature [ 56 , 58 ] on the modification of epoxy compounds with various fillers. Studies [ 50 , 51 ] were conducted with the use of various amounts of fillers, including flame retardants, depending on the resin type. Also, patent descriptions (PL 230,340 B1, PL 214,525 B1) provide information about the addition of antipyrine to epoxy resin in amounts ranging from 1 to 2%.…”

“…Studies have shown that boric acid is used as an additive that reduces the flammability of polymers [ 42 , 45 , 51 , 52 , 53 ], e.g., polyurethane or polyurethane–polyisocyanurate foams [ 44 ], as well as of epoxy composites [ 42 , 43 ]. Paciorek-Sadowska et al [ 44 ] found that the application of borate as a polyol component and, simultaneously, as a flame retardant in the recipe for the production of PUR-PIR foams was very favorable.…”