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:
Jul. 19, 2005
Filed:
Oct. 18, 2001
Monika Kursawe, Seeheim-Jugenheim, DE;
Walther Glaubitt, Margetshoechheim, DE;
Monika Kursawe, Seeheim-Jugenheim, DE;
Walther Glaubitt, Margetshoechheim, DE;
Merck Patent GmbH, Darmstadt, DE;
Abstract
Aqueous coating solution having a pH of from 3 to 8, comprising 0.5-5.0% by weight of [SiO(OH)]particles, where 0<y<4 and 0<x<2, having a particle size of from 10 nm to 60 nm with a tolerance of ±10%, and from 0.005 to 0.5% by weight, based on the coating solution, of a surfactant mixture obtainable by hydrolytic polycondensation of tetraalkoxysilanes in an aqueous-alcoholic-ammoniacal medium at temperatures between 35° C. and 80° C., with subsequent removal of ammonia and alcohol from the resultant dispersion by steam distillation and subsequent addition of a surfactant mixture comprising 15-30% by weight of anionic surfactants, 5-15% by weight of nonionic surfactants and less than 5% by weight of amphoteric surfactants.