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. 24, 1988
Filed:
Apr. 10, 1987
Friedhelm Pilger, Cologne, DE;
Reinhold Franzen, Leverkusen, DE;
Wolfgang Reichmann, Pittsburgh, PA (US);
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
Molded polyurea foam parts having densities of from 200 to 600 kg/m.sup.3 and a compact skin are made by reacting a polyisocyanate component with a polyamine component in a closed mold at an isocyanate index of from 70 to 130. The polyamine component generally includes (1) an aminopolyether having a molecular weight of from 1800 to 12,000 and 2 to 3 isocyanate reactive groups of which at least 90% are aromatically bound primary and/or secondary amino groups, (2) an aromatic diamine, (3) a foaming agent and optionally (4) known auxiliaries and additives. The polyisocyanate component includes any aromatic di- and/or poly-isocyanate. Parts produced by this process have excellent mechanical properties and a well-defined solid skin.