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. 08, 1990
Filed:
Dec. 22, 1988
Hajime Hasegawa, Chigasaki, JP;
Taiji Koga, Yokohama, JP;
Atsuo Takei, Fujisawa, JP;
Toru Okuyama, Sagamihara, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A process for producing a polyurethane foam from a foam raw material containing polyols, organic isocyanates, catalysts and blowing agents, which comprises using as the polyols a high-molecular weight polyol having a hydroxyl number lower than 100 and a low-molecular weight polyol having a hydroxyl number higher than 200 which are mixed at a ratio of 4:6 to 6:4 (by weight), and also using as the catalysts a tertiary amine alone. Polyurethane forms having good buckling performance can be obtained by the process and they are expected to be useful as a packaging material, shock-absorbing material, heat-insulating material, and so on.