3902 Polymers of propylene or of other olefins, in primary forms

3902 (01/1988-..) Polymers of propylene or of other olefins, in primary forms 39021000 (01/1988-..) Polypropylene, in primary forms 39022000 (01/1988-..) Polyisobutylene, in primary forms 39023000 (01/1988-..) Propylene copolymers, in primary forms 39029000 (01/1988-12/1996) Polymers of propylene or of other olefins, in primary forms (excl. polypropylene, polyisobutylene and propylene copolymers) 39029010 (01/1997-..) A-B-A block copolymer of propylene or of other olefins, of polystyrene, ethylene-butylene copolymer and polystyrene, containing by weight <= 35% of styrene, in blocks of irregular shape, lumps, powders, granules, flakes and similar bulk forms 39029020 (01/1997-..) Polybut-1-ene, a copolymer of but-1-ene with ethylene containing by weight <= 10% of ethylene, or a blend of polybut-1-ene with polyethylene and/or polypropylene containing by weight <= 10% of polyethylene and/or <= 25% of polypropylene, in blocks of irregular shape, lumps, powders, granules, flakes and similar bulk forms 39029090 (01/1997-..) Polymers of propylene or of other olefins, in primary forms (excl. polypropylene, polyisobutylene, propylene copolymers, and a A-B-A block copolymer of polystyrene, ethylene-butylene copolymer and polystyrene, containing by weight <= 35% of styrene and polybut-1-ene, a copolymer of but-1-ene with ethylene containing by weight <= 10% of ethylene, or a blend of polybut-1-ene with polyethylene and/or polypropylene containing by weight <= 10% of polyethylene and/or <= 25% of polypropylene, in blocks of irregular shape, lumps, powders, granules, flakes and similar bulk forms)