Flame Retardant Properties of Phosphorus Esters Derived from Isosorbide Di(14-hydroxy- 12-thiatetradecenoate)

摘要

Concerns about the quality of the environment, sustainability and potential toxicity have led to an increasing interest in polymer additives derived from renewable biosources. In particular, flame retardants derived from biosources have several advantages over petrochemical materials. Starting materials are generally nontoxic (sometimes edible) and available from plant sources on an annual basis. Products obtained from these materials are not persistent in the environment and often degrade to innocuous compounds. This is particularly the case for many organophosphorus compounds. Isosorbide di(undec-10-enoate) may be prepared from isosorbide (a starch derivative) and 10-undecenoic acid (derived from caster oil). This ester is doubly unsaturated and may be used as a base for the generation of a series of phosphorus esters which impart good flame retardancy to DGEBAA epoxy resin at low phosphorus loading.