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. 27, 2004
Filed:
Mar. 22, 2002
Arthur J. Roth, Orinda, CA (US);
Hunter Paine Enterprises, LLC, Lafayette, CA (US);
Abstract
In a process of generating a polyurethane foam by forming a mixture including isocyanate and polyol reactants, catalyst, and blowing agent, which mixture reacts exothermically to yield a rigid polyurethane foam, there is included in the mixture expandable polymer beads, made of a thermoplastic polymer (e.g., polystyrene or a polyolefin) that has a softening point at or below the maximum temperature reached during the exothermic reaction. The beads may be added in unexpanded form, partially expanded form, or fully expanded form. The heat of the urethane-forming reaction causes the beads to sinter, creating hollow polymeric spheres in the foam, which are larger than the cells in the polyurethane matrix, and which appear to improve the foam's crush resistance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile