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:
Aug. 22, 2000
Filed:
Oct. 13, 1998
Karl-Werner Dietrich, Odenthal, DE;
Manfred Dietrich, Leverkusen, DE;
Wilhelm Lamberts, Sao Paulo-SP, BR;
Walter Klan, Leverkusen, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
Polyol formulations, containing polyether polyols possessing 40 to 80 wt. % of tertiary amino groups and having an OH number of 300 to 500, preferably 350 to 420, obtainable by addition of exclusively propylene oxide to o-toluene diamine, which contain cyclopentane and/or n- and/or i-pentane and/or hydrofluoroalkanes as blowing agent, are used for the manufacture of rigid polyurethane foams by reacting with organic polyisocyanates, optionally further compounds with at least two hydrogen atoms reactive to isocyanates, optionally in the presence of water, and further blowing agents known per se as well as conventional auxiliaries and additives.