1,2-Benzenedicarboxylic acid, 3,4,5,6-tetrabromo-, polymer with alpha-hydro-omega-hydroxypoly(oxy(methyl-1,2-ethanediyl)) and alpha-hydro-omega-hydroxypoly(oxy(methyl-1,2-ethanediyl)) ether with 2,2-bis(hydroxymethyl)-1,3-propanediol (4:1) 67924-30-5