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# c19) United States c12) Patent Application Publication 

# Fassbender et al. 

# (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. 

## Related U.S. Application Data 

<img src='content_image/925257.jpg'>

(51) Int. Cl. 

(52) U.S. Cl. ................... 162/181.3; 162/158; 162/181.2; 162/181.1; 162/181.5; 162/181.8 

## (57) ABSTRACT 

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). 

US 20120186766Al 

# c10) Pub. No.: US 2012/0186766 Al 

# (43) Pub. Date: Jul. 26, 2012 

## Publication Classification 

<img src='content_image/925275.jpg'>

