3903 Polymers of Styrene, in Primary Forms

3903 (01/1988-..) Polymers of Styrene, in Primary Forms 39031100 (01/1988-..) Expansible Polystyrene, in Primary Forms 39031900 (01/1988-..) Polystyrene, in Primary Forms (Excl. Expansible) 39032000 (01/1988-..) Styrene-acrylonitrile Copolymers `san`, in Primary Forms 39033000 (01/1988-..) Acrylonitrile-butadiene-styrene Copolymers `abs`, in Primary Forms 39039000 (01/1988-12/1996) Polymers of Styrene, in Primary Forms (Excl. Polystyrene, Styrene-acrylonitrile Copolymers 'san' and Acrylonitrile-butadiene-styrene 'abs') 39039010 (01/1997-..) Copolymer Solely of Styrene With Allyl Alcohol, of an Acetyl Value of >= 175, in Primary Form 39039020 (01/1997-..) Brominated Polystyrene Containing by Weight >= 58% but <= 71% of Bromine, in Blocks of Irregular Shape, Lumps, Powders, Granules, Flakes and Similar Bulk Forms 39039090 (01/1997-..) Polymers of Styrene, in Primary Forms (Excl. Polystyrene, Styrene-acrylonitrile Copolymers `san`, Acrylonitrile-butadiene-styrene `abs`, Copolymer Solely of Styrene With Allyl Alcohol, of an Acetyl Value of >= 175 and Brominated Polystyrene, Containing BY Weight >= 58% but <= 71% of Bromine, in Blocks of Irregular Shape, Lumps, Powders, Granules, Flakes and Similar Bulk Forms)