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:
Aug. 16, 2005
Filed:
Feb. 25, 2003
Mariano Malaga Mellado, Madrid, ES;
Dolores Blanco Gonzalez, Alcorcón, ES;
Beatriz Montalvo Barroso, Leganés, ES;
Mariano Malaga Mellado, Madrid, ES;
Dolores Blanco Gonzalez, Alcorcón, ES;
Beatriz Montalvo Barroso, Leganés, ES;
Repsol Quimica S.A., Madrid, ES;
Abstract
The invention relates to a process to produce high-purity, low-odour polyether polyols, with very low levels of catalytic residues, by means of alkene oxide polyaddition reactions to substances that contain active hydrogens in the presence double metal cyanides as catalysts. The process is characterized in that the reaction is carried out in the presence of sepiolites and/or by subsequent treatment with sepiolites of the polyether polyols produced with double metal cyanides in the absence of sepiolites.