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:
Dec. 26, 2000
Filed:
Sep. 23, 1998
Applicant:
Inventors:
Kieth G Spitler, Burgettstown, PA (US);
William J Nicola, Burgettstown, PA (US);
Carl E Holsinger, Freedon, PA (US);
Assignee:
Bayer Corporation, Pittsburgh, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08L / ; C08G / ;
U.S. Cl.
CPC ...
523218 ; 523219 ; 521 54 ; 521137 ; 521155 ;
Abstract
The present invention relates to the use of hollow microspheres filled with a hydrocarbon, to introduce uniform cell geometries in syntactic foams having a bimodal cell structure. The rigid foam product includes from 20 to 80 percent by weight of the hollow microspheres, the microspheres having average diameters ranging from 80 to 200 microns. The microspheres are encapsulated from 80 to 20 percent by weight of a closed cell polyurethane foam, the cells of the foam having average diameters from 0.01 to 60 microns.