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:
May. 27, 1980
Filed:
Feb. 21, 1979
Applicant:
Inventors:
Takashi Ohashi, Iruma, JP;
Minoru Kojima, Ohme, JP;
Masako Yoshida, Kodaira, JP;
Toru Okuyama, Sagamihara, JP;
Ryozo Sakata, Higashiyamato, JP;
Assignee:
Bridgestone Tire Company Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
521118 ; 428315 ; 521124 ; 521125 ; 521127 ; 521129 ; 521131 ; 521167 ; 521173 ; 521175 ; 521176 ; 521177 ; 521902 ; 521903 ;
Abstract
A process for producing a rigid polyurethane foam having excellent flame retardance and low-smoke development is disclosed. When the rigid polyurethane foam is produced by reacting a polyhydroxyl compound with an organic polyisocyanate in the presence of a blowing agent, a surfactant, a catalyst and other additives, 3-methylpentane-1,3,5-triol is used as a part of the polyhydroxyl compound.