2-Pyrrolidinone, 1-ethenyl-, polymer with ethenylbenzene, block Agrimer ST Benzene, ethenyl-, polymer with 1-ethenyl-2-pyrrolidinone, block N-Vinylpyrrolidinone-styrene block copolymer N-Vinylpyrrolidone-styrene block copolymer Poly(styrene-block-vinylpyrrolidone) Styrene-N-vinyl-2-pyrrolidone block copolymer Styrene-N-vinylpyrrolidone block copolymer Styrene-N-vinylpyrrolidone block polymer Styrene-vinylpyrrolidone block copolymer Vinylpyrrolidone-styrene block copolymer