Lara Greiner1,*, Philipp Kukla2, Sebastian Eibl1, Manfred Döring3
Journal of Renewable Materials, Vol.10, No.7, pp. 1931-1950, 2022, DOI:10.32604/jrm.2022.019548
- 07 March 2022
Abstract A novel, versatile flame retardant substructure based on phosphorylated salicylic acid (SCP) is described and used
in the synthesis of new flame retardants for HexFlow® RTM6, a high-performance epoxy resin used in resin
transfer molding processes as composite matrix. The starting material salicylic acid can be obtained from natural
sources. SCP as reactive phosphorus chloride is converted with a novolak, a novolak containing 9, 10-dihydro-9-
oxa-10-phospha-phenanthrene-10-oxide (DOPO) substituents or DOPO-hydroquinone to flame retardants with
sufficient thermal stability and high char yield. Additionally, these flame retardants are soluble in the resin as well
as react into the… More >
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