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:
Apr. 23, 2013
Filed:
Oct. 19, 2009
Ansgar Frericks, Emsbueren, DE;
Heinz-dieter Lutter, Lembruch, DE;
Edmund Stadler, Hollfeld, DE;
Heinz-juergen Schroeder, Lauchhammer, DE;
Kirsten Simon, Asendorf, DE;
Andre Meyer, Lemfoerde, DE;
Franck Pomeris, Magny le Hongre, FR;
Ansgar Frericks, Emsbueren, DE;
Heinz-Dieter Lutter, Lembruch, DE;
Edmund Stadler, Hollfeld, DE;
Heinz-Juergen Schroeder, Lauchhammer, DE;
Kirsten Simon, Asendorf, DE;
Andre Meyer, Lemfoerde, DE;
Franck Pomeris, Magny le Hongre, FR;
BASF SE, Ludwigshafen, DE;
Abstract
Invention relates to a process for producing viscoelastic flexible polyurethane foams by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups, wherein as b) a mixture of bi) from 25 to 70% by weight of a hydroxyl-comprising natural oil or fat or a reaction product of a hydroxyl-comprising natural oil or fat with alkylene oxides, bii) from 3 to 30% by weight of at least one polyether having a hydroxyl number of from 100 to 800 mg KOH/g and a functionality of 3-5 selected from the group consisting of polyether prepared by addition of alkylene oxides onto an amine, biii) 20-50% by weight of at least one polyether alcohol having a hydroxyl number of from 10 to 80 mg KOH/g and a functionality of 2-5, where the proportion of ethylene oxide is 5-25% by weight, based on the weight of the polyether alcohol, and at least part of the ethylene oxide is added on at the end of the polyether chain, biv) >0-8% by weight of at least one polyether alcohol having a functionality of 2-4, a hydroxyl number of 15-60 mg KOH/g and a content of ethylene oxide of >50% by weight of the polyether alcohol is used.