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:
Sep. 07, 1993
Filed:
Jul. 29, 1992
Henning Bachem, Cologne, ZA;
Anno Borkowsky, Huerth, DE;
Heinrich Grave, Bergisch Gladbach, DE;
Dietrich Tegtmeyer, Koeln, DE;
Bernd von der Linden, Leverkusen, DE;
Bayer Aktiengesellschaft, Leverkusen-Bayerwerk, DE;
Abstract
Latex dispersions are concentrated by a process in which, in a two-stage crossflow filtration, the latex dispersion is first concentrated under pressures of 2 to 7 bar and at temperatures of 20.degree. to 70.degree. C. under turbulent flow conditions, the permeate accumulating together with the emulsifier present therein is then also concentrated at 10 to 40 bar and at temperatures of 20.degree. to 50.degree. C. and the concentrate obtained is returned with the emulsifier to the first stage of the crossflow filtration process while the permeate of the second stage is returned to the production process.