| abstract |
General formula (I): [In the formula, R 1 to R 4 , R 7 and R 8 are independently alkyl groups having 1 to 4 carbon atoms or alkoxy groups having 1 to 4 carbon atoms, and R 5 , R 6 and R 9 are respectively. Independently an alkyl group having 1 to 10 carbon atoms or an alkoxy group having 1 to 10 carbon atoms, n is an integer of 1 to 10, and n 1 and n 2 are independently integers of 0 to 3. , M 1 and m 2 are independently integers 0-4, p is an integer 0-26, k is an integer 1-12, and any two Rs when p is 2 or greater. flame retardants containing aromatic phosphoric acid ester represented by the R 9 together with the carbon atoms of the ring attached may form a separate ring] connected 9 to each other. |