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:
Jun. 16, 1981
Filed:
Jun. 02, 1980
Applicant:
Inventor:
Robert J Raynor, North Branford, CT (US);
Assignee:
Olin Corporation, New Haven, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
521110 ; 521112 ; 521167 ; 521175 ;
Abstract
A process for the preparation of rigid polyurethane foams which are relatively stable at elevated temperatures involves reacting a polyether polyol reactant with an organic polyisocyanate reactant in the presence of a foaming agent comprising water. The polyol reactant is a select combination of three polyols and is effective in improving the thermal stability of the resulting foam without appreciably affecting its other physical properties.