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:
Sep. 14, 1993
Filed:
Jan. 21, 1993
Applicant:
Inventors:
Michael F Hurley, Oakdale, PA (US);
Terry D Seagraves, Marion, IN (US);
Assignee:
Miles Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
264 50 ; 264 51 ; 264 54 ; 2643281 ; 2643286 ; 2643288 ; 521 54 ; 521 99 ; 521128 ; 521137 ; 521112 ;
Abstract
It has been found that the use of specific expanded organic microspheres greatly improve the RIM process by (i) significantly enhancing the blowing action of air and/or nitrogen, (ii) providing for uniform density of the molded part, (iii) allowing for the reduction of internal mold pressures, (iv) substantially eliminating surface defects, (v) allowing for a significant reduction in density in the molded product, (vi) allowing for a substantial increase in the amount of air and/or nitrogen that can be dissolved in the isocyanate-reactive component, and (vii) significantly reducing shrinkage in the molded part.