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:
Nov. 28, 2000
Filed:
Feb. 22, 1999
Peter H Markusch, McMurray, PA (US);
Donald MacNaughtan, Jr, New Martinsville, WV (US);
William G Crabtree, Wheeling, WV (US);
Robert L Cline, Paden City, WV (US);
Bayer Corporation, Pittsburgh, PA (US);
Abstract
This invention relates to an isocyanate composition comprising a) at least one isocyanate and b) from 1 to 50% by weight, based on the total weight of component a), of sulfur. These isocyanate compositions are suitable for the preparation of polyurethane/polyurea encapsulated fertilizers. Accordingly, the present invention also relates to an improved process for the production of a polyurea/polyurethane encapsulated fertilizer comprising applying at least one isocyanate-reactive component to the fertilizer particles and applying the isocyanate compositions of the present invention to the fertilizer particles, to form these polyurea/polyurethane encapsulated fertilizers.