1,2-Benzenedicarboxylic acid, 3,4,5,6-tetrachloro-, polymer with alpha-hydro-omega-hydroxypoly(oxy(methyl-1,2-ethanediyl)) and alpha,alpha',alpha''-phosphinylidynetris(omega-hydroxypoly(oxy(methyl-1,2-ethanediyl))) 67924-28-1