DIMETHYL TEREPHTHALATE-BUTYLENE GLYCOL-POLYETHER COPOLYMER

1,4-Benzenedicarboxylic acid, dimethyl ester, polymer with 1,4-butanediol and α-[2-(5-carboxy-1,3- dihydro-1,3-dioxo-2H-isoindol-2-yl)methylethyl]-ω-[2-(5-carboxy-1,3-dihydro-1,3-dioxo-2H-isoindo l-2-yl)methylethoxy]poly[oxy(methyl-1,2-ethanedi yl)

1,4-Benzenedicarboxylic acid, dimethyl ester, polymer with 1,4-butanediol and .alpha.-[2-(5-carboxy-1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)methylethyl]-.omega.-[2-(5-carboxy-1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl) methylethoxy]poly[oxy(methyl-1,2-ethanedi