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:
Jun. 09, 2015
Filed:
Nov. 15, 2012
Rene Kiesewetter, Wietzendorf, DE;
Grit Grote, Soltau, DE;
Meinolf Brackhagen, Walsrode, DE;
Matthias Knarr, Nienburg/Weser, DE;
Roland Adden, Walsrode, DE;
Rene Kiesewetter, Wietzendorf, DE;
Grit Grote, Soltau, DE;
Meinolf Brackhagen, Walsrode, DE;
Matthias Knarr, Nienburg/Weser, DE;
Roland Adden, Walsrode, DE;
Dow Global Technologies LLC, Midland, MI (US);
Abstract
Cellulose ethers, wherein at least a part of the hydroxyl groups of the cellulose backbone are substituted by methoxy groups and hydroxyalkoxy groups, and optionally alkoxy groups being different from methoxy groups, having an unconventional distribution of methoxy substituents at the 2-, 3- and 6-positions of the anhydroglucose units are described. Such cellulose ethers exhibit significantly higher thermoreversible gel strengths than any known hydroxyalkyl methyl celluloses of comparable viscosity and kind and level of substitution rendering them useful as additives for building compositions such as cement based tile adhesives. In particular, such cellulose ethers can be used to improve the attainable adhesion strength after heat storage conditioning and the temporal setting characteristics of a building composition.