PHOSPHORUS-MODIFIED EPOXY RESIN, PROCESS FOR PREPARATION AND USE THEREOF Russian patent published in 1999 - IPC

FIELD: organic chemistry. SUBSTANCE: phosphorus-modified epoxy resin with epoxy number of 0.2- 1 mole per 100 g is prepared by reacting polyepoxydiene with at least two epoxy groups per molecule selected from polyglycidyl ethers from multiatomic ethers and from multiatomic phenols, products of hydrogeneration of said phenols and/or novolacs with pyrophosphonic acids of formula (I) wherein R¹ is C_1-10 hydrocarbon residue and/or incomplete phosphonic acid esters of formula II: wherein R¹ is C_1-10 hydrocarbon residue; R² is C_1-10 alkyl, aryl or aralkyl in inert diluent or mass. In addition to nonflammability, the resulting phosphorus-modified epoxy resins have high storage stability. It is technologically simple and economical to prepare epoxy resins depending on variations in phosphorus content. EFFECT: improved properties of the epoxy resin. 17 cl, 1 ex