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. 24, 2015
Filed:
Feb. 07, 2011
Ralf Bohlander, Erkrath, DE;
Silke Muckenfuβ, Langenfeld, DE;
Rüdiger Ziervogel, Monheim, DE;
Cognis IP Management GmbH, Duesseldorf, DE;
Abstract
Disclosed are aqueous solutions of silicates (waterglasses), comprising (a) 20 to 40% by weight of SiO, (b) 10 to 30% by weight of MO, where M is a cation selected from the group consisting of Li, Na, K, and NY, where Y is a C1-C6 alkyl or alkenyl radical, and (c) water; which solutions are obtained by a process comprising (i) providing an aqueous solution of a silicate (waterglass) of the formula MO×nSiO, as above, where n=1-5, and (ii) fine filtering the solution over a filter element that is stable at pH values of 12 or more, at a temperature in the range of 20 to 140° C., provided that the filtrate solution has a turbidity of 4 FNU or less. The aqueous solutions are clear at temperatures below −10° C., and are storage-stable against turbidity for at least 1 month.