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:
May. 05, 2015
Filed:
May. 12, 2005
Hans Frei, Jona, CH;
Henri Mispreuve, Wangen, CH;
Reinold Naescher, Zurich, CH;
Kurt Schoenenberger, Siebnen, CH;
Stefano Tenzi, Wetzikon, CH;
Hans Frei, Jona, CH;
Henri Mispreuve, Wangen, CH;
Reinold Naescher, Zurich, CH;
Kurt Schoenenberger, Siebnen, CH;
Stefano Tenzi, Wetzikon, CH;
Fritz Nauer AG, Wolfhausen, CH;
Abstract
Flexible polyurethane foam is made by mixing prepolymer with foam-forming ingredients comprising isocyanate and water which react to give carbon dioxide. The prepolymer is hydroxyl-tipped, being made by reacting polyol with less than the theoretical proportion of isocyanate required to react with available hydroxyl groups of the polyol. The prepolymer is a new storage stable starting material for use in making flexible polyurethane foam, and the foam produced with the prepolymer has advantageous properties with regard to hydrolysis resistance. The prepolymer may be made with low or high viscosity by appropriate selection of the proportion of isocyanate which reacts with the polyol. At high viscosities cell structure can be advantageously controlled by appropriate gasification or degasification during foaming.