The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2014
Filed:
Dec. 07, 2009
Tilman Sirch, Schifferstadt, DE;
Michael Steiniger, Neustadt, DE;
Steffen Maas, Bubenheim, DE;
Stefan Rittinger, Mannheim, DE;
Stephan Schlitter, Shanghai, CN;
Tilman Sirch, Schifferstadt, DE;
Michael Steiniger, Neustadt, DE;
Steffen Maas, Bubenheim, DE;
Stefan Rittinger, Mannheim, DE;
Stephan Schlitter, Shanghai, CN;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a process for distilling an aqueous polymethylol mixture which comprises a polymethylol of the formula (I)(HOCH)—C—R  (I)in which each R is independently a further methylol group or an alkyl group having 1 to 22 carbon atoms or an aryl or aralkyl group having 6 to 22 carbon atoms, a tertiary amine, water and the adduct of tertiary amine and formic acid (amine formate), which comprises performing the distillation in a distillation column which is connected at the bottom to an evaporator, the bottom temperature being above the evaporation temperature of the monoester of formic acid and polymethylol (polymethylol formate) which forms during distillation. The present invention further relates to a composition comprising polymethylol and 1 to 10 000 ppm by weight of polymethylol formate, and to the use thereof.