DE19817374-A1  CHERDRON,H., et.al.: Miscible Blends of Polybenzimidazole and Polyaramides with Polyvinylpyrrolidone. In: Journal of Applied Polymer Science, Vol.53, 1994, S.507-512WO9954407-A2  CHEMICAL ABSTRACTS, vol. 113, no. 14, 1. Oktober 1990 (1990-10-01) Columbus, Ohio, US; abstract no. 116309p, MAKHIJA S. ET AL : "Miscibility studies in blends of polybenzimidazoles and poly84-vinylpyridine)." XP002124111 & POLYMER. ENG. SCI. I, Bd. 30, Nr. 13 , 1990,;  CHEMICAL ABSTRACTS, vol. 117, no. 4, 22. Juli 1992 (1992-07-22) Columbus, Ohio, US; abstract no. 30999j, CHANDRA M. ET AL: "Removal of Uranium from acidic sulfate solution by ion exchange on polyvinyl pyridine and polybenzimidazole" Seite 286; XP002124110 & REACT. POLYM.R, Bd. 17, Nr. 2, 1992, Seiten 159-174,;  CHEMICAL ABSTRACTS, vol. 117, no. 4, 22. Juli 1992 (1992-07-22) Columbus, Ohio, US; abstract no. 30999j, CHANDRA M. ET AL: "Removal of Uranium from acidic sulfate solution by ion exchange on polyvinyl pyridine and polybenzimidazole" Seite 286; XP002124110&REACT. POLYM.R, Bd. 17, Nr. 2, 1992, Seiten 159-174,;  CHEMICAL ABSTRACTS, vol. 113, no. 14, 1. Oktober 1990 (1990-10-01) Columbus, Ohio, US; abstract no. 116309p, MAKHIJA S. ET AL : "Miscibility studies in blends of polybenzimidazoles and poly84-vinylpyridine)." XP002124111&POLYMER. ENG. SCI. I, Bd. 30, Nr. 13 , 1990,EP1076676-A2  See references of WO 9954407A3EP1076676-B1  CHEMICAL ABSTRACTS, vol. 113, no. 14, 1. Oktober 1990 (1990-10-01) Columbus, Ohio, US; abstract no. 116309p, MAKHIJA S. ET AL : "Miscibility studies in blends of polybenzimidazoles and poly84-vinylpyridine)." XP002124111 & POLYMER. ENG. SCI. I, Bd. 30, Nr. 13 , 1990,;  CHEMICAL ABSTRACTS, vol. 117, no. 4, 22. Juli 1992 (1992-07-22) Columbus, Ohio, US; abstract no. 30999j, CHANDRA M. ET AL: "Removal of Uranium from acidic sulfate solution by ion exchange on polyvinyl pyridine and polybenzimidazole" Seite 286; XP002124110 & REACT. POLYM.R, Bd. 17, Nr. 2, 1992, Seiten 159-174,US6723757-B1  Chanda, M., et al., "Removal of Uranium from Acidic Sulfate Solution by Ion Exchange on Poly(4-vinylpyridine) and Polybenzimidazole in Protonated Sulfate Form," Chemical Abstract No. 117:30999 (1992).;  Cherdon, H., et al., "Miscible Blends of Polybenzimidazole and Polyaramides with Polyvinylpyrrolidone," Journal of Applied Polymer Science, 53:507-512 (1994).;  Makhija, S., et al., "Miscibility Studies in Blends of Polybenzimidazoles and Poly94-vinylpyridine)," Chemical Abstract No. 113:116308p (1990).