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:
Dec. 11, 1990
Filed:
Aug. 11, 1989
Peter Haas, Haan, DE;
Hans Hettel, Roesrath-Forsbach, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
The present invention relates to a process for the preparation of polyurethane foams comprising reacting polyisocyanates with dispersions of (i) polymer-containing relatively high molecular weight hydroxyl compounds that are prepared by reaction of mono- or polyisocyanates with NH-containing compounds selected from the group consisting of polyamines containing primary and/or secondary amino groups, hydrazines, hydrazides, and alkanolamines in (ii) a compound containing 1 to about 8 primary and/or secondary hydroxyl groups and having a molecular weight of about 400 to about 16,000, in the presence of water and/or organic blowing agents; catalysts; and flameproofing agents comprising an expandable graphite modified by inorganic expandable materials, alone or in combination with inorganic co-flameproofing agents.