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:
Nov. 20, 1990
Filed:
May. 10, 1989
Applicant:
Inventors:
Henri J Grunbauer, Oostburg, NL;
Guido F Smits, Wijengem, BE;
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
521131 ; 25218215 ; 25218224 ;
Abstract
This invention relates to a process for preparing a rigid, closed-celled polyisocyanate-based foam in the presence of a blowing agent composition. The blowing agent composition comprises one or more organic compounds, particularly halocarbons, having a boiling point of less than or equal to 272K at atmospheric pressure, and further is substantially free of organic compounds having a boiling point of 273K or greater. Preferred halocarbons are chlorofluoroethanes and fluoroethanes.