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. 04, 2015
Filed:
Aug. 30, 2011
Hongming MA, Lake Jackson, TX (US);
Kaoru Aou, Lake Jackson, TX (US);
Rogelio R. Gamboa, Brazoria, TX (US);
Carola Rosenthal, Au, CH;
Randal Autenrieth, Lake Jackson, TX (US);
Hongming Ma, Lake Jackson, TX (US);
Kaoru Aou, Lake Jackson, TX (US);
Rogelio R. Gamboa, Brazoria, TX (US);
Carola Rosenthal, Au, CH;
Randal Autenrieth, Lake Jackson, TX (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
A reaction system comprising an organic polyisocyanate and an isocyanate reactive component for preparation of a viscoelastic polyurethane foam is provided. The isocyanate reactive component comprises (i) from 10 to 50% by weight of one or more low equivalent weight propylene oxide rich (PO-rich) polyols having a combined number average equivalent weight from 200 to 500, (ii) from 45 to 95% by weight of one or more ethylene oxide (EO-rich) polyols having a combined number average equivalent weight from 200 to 800 and an ethylene oxide content from 40% to 65% by weight of the total mass of the EO-rich polyol and at least one of (iii) from 10 to 30% by weight of one or more high equivalent weight PO-rich polyols having a number average equivalent weight from 800 to 2,000 or (iv) from 10 to 40% by weight of one or more propylene oxide co-polymer polyols containing styrene-acrylonitrile.