Flame Retardant Properties of Phosphorus Esters of Isosorbide

摘要

Flame retardants derived from renewable biomaterials are particularly attractive. They are independent of the supply/cost of petroleum, are often nontoxic or biodegradable and display a small carbon footprint. Starch from seed plants is currently a source of a variety of bio-derived building blocks. One of these, isosorbide, is a dihydroxy ether which may be converted to phosphorus esters. A series of such esters has been prepared, characterized and evaluated for flame retardant potential in DGEBA epoxy. A 1% phosphorus loading is generally sufficient to provide polymer with LOI > 25 and UL 94 VI.