Flammability of Polyester and Epoxy Resins by Using Some of a New Organic Compounds

In this work, seven additives were used, namely: (5-(6-bromobenzothiazol-2-yl)diazenyl)-2- hydroxybenzaldehyde) (AdditiveI), (5-6-bromobenzothiazol-2-yl)diazenyl)-2-hydroxyphenyl)-1-(4-hydroxy-3-methoxyphenyl)prop-2-en-1-one) (AdditiveII), 5,6-(bromobenzothiazol-2-yl)diazenyl)-2-hydroxyphenyl)-1-(4-hydroxyphenyl) prop-2-en-1-one (Additive III), 5-6-bromobenzothiazol-2-yl)diazenyl)-2-hydroxyphenyl)-1-(4-methoxyphenyl)prop-2-en-1-one (Additive IV), 4-6-bromobenzothiazol-2-yl)diazenyl)-2-2-hydroxy-5-methylphenyl)imino)methyl) phenol(AdditiveV).4-6-bromobenzothiazol-2-yl)diazenyl)-2-2-hydroxy-5-methylphenyl)imino)methyl)phenol (Additive VI) and(1E)-N-(5-((6-bromobenzo[d]thiazol-2-yl)diazenyl)-2-hydroxybenzylidene)-N'-(4-chlorophenyl)formimidamide(Additive VII). The effects of these additives on flammability of some of the thermosetting polymers (unsaturated polyester and epoxy resins), have been studied. Sheets of the specimens (resins with different weight percentages of additives), in dimensions (150X150X3) mm were prepared. Two standard test methods used to measured the flame retardation which are: (ASTM: D-2863) and (ASTM: D- 635). Results are obtained from these tests indicated that, additive 6A has high efficiency as flame retardant, self– extinguishing (S.E.) at the percentage (0.1 %) for unsaturated polyester and the epoxy resins. Also selfextinguishing (S.E.) at the percentage (0.1%) for additives 1A, 4A and 5A, in unsaturated polyester resin and nonburning occurs in 0.15% with Additive 6A and 5A in unsaturated polyester resin but it is occur in 0.2% with additives 6A and 5A in epoxy resin. Additive A shows low effect on flammability in both resins.