abstract |
The invention relates to flame-resistant epoxy resins and flame retardants for epoxy resins, new compounds and compositions also being proposed. The compounds used as flame retardants are based on derivatives of 4-hydroxy-butane-1-phosphinic acid and / or its intramolecular ester and are preferably derived from the corresponding unsaturated compounds, in particular from 4-hydroxy-1,3-butadiene-1-phosphinic acid and / or their intramolecular ester. |