US 20120186766Al  c19)  United States  c12)  Patent Application Publication  Fassbender et al.  c10)  Pub. No.: US 2012/0186766 Al  (43)  Pub. Date:  Jul. 26, 2012  (54)  MANUFACTURING A PAPERY ARTICLE  (75)  Inventors:  Stefan Fassbender,  Speyer (DE);  Christoph Lessig,  Dachau (DE)  (73)  Assignee:  BASF SE,  Ludwigshafen (DE)  (21)  Appl. No.:  13/356,838  (22)  Filed:  Jan.24,2012  (60)  Provisional application No. 61/435,812, filed on Jan.  25, 2011.  (52)  U.S. Cl.  ...................  162/181.3;  162/158; 162/181.2;  162/181.1; 162/181.5; 162/181.8  (51)  Int. Cl.  Publication Classification  (57)  ABSTRACT  Related U.S. Application Data  The present invention relates to a process for manufacturing  papery articles, such as paper, card and board, comprising the  pH adjustment of an aqueous composition comprising at least  one fiber stock by addition ofmethanesulfonic acid (MSA).  D21H 17166  (2006.01)  D21H 17163  (2006.01)  D21H 17168  (2006.01)  D21H 17109  (2006.01) 