| abstract |
(57) Abstract: A novel phosphorus-containing ethylenically unsaturated monomer and a flame-retardant resin using the same are provided. A phosphorus-containing ethylenically unsaturated monomer represented by the following general formula (1) or the following general formula (2). [In the formula, R 1 and R 2 are hydrogen atoms or methyl. R 3 is alkyl having 1 to 18 carbons, benzyl or phenyl. R 4 is a hydrogen atom or alkyl having 1 to 4 carbons. m is an integer of 2 to 4] |