Condensation or rearrangement polymerisation products whether or not chemically modified
Condensation or rearrangement polymerization products, whether or not chemically modified, n.e.s., in primary forms (excl. poly"oxy1,4phenylenesulphonyl1,4phenyleneoxy1,4phenyleneisopropylidene1,4phenylene" in blocks of irregular shape, lumps, powders, granules, flakes and similar bulk forms and poly"thio1,4phenylene)
Poly"oxy1,4phenylenesulphonyl1,4phenyleneoxy1,4phenyleneisopropylidene1,4phenylene" in blocks of irregular shape, lumps, powders, granules, flakes and similar bulk forms, whether or not chemically modified
Poly"thio1,4phenylene", whether or not chemically modified, in primary forms