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:
Oct. 24, 2006
Filed:
Apr. 29, 2004
Jean-pierre L. Dwan'isa, Liege, BE;
Lawrence T. Drzal, Okemos, MI (US);
Amar K. Mohanty, Okemos, MI (US);
Manjusri Misra, Okemos, MI (US);
Jean-Pierre L. Dwan'Isa, Liege, BE;
Lawrence T. Drzal, Okemos, MI (US);
Amar K. Mohanty, Okemos, MI (US);
Manjusri Misra, Okemos, MI (US);
Board of Trustees of Michigan State University, East Lansing, MI (US);
Abstract
A solvent-free process for making a polyol fatty acid polyester composition useful for preparation of polyurethanes is described. These compositions are preferably made by reaction of a natural oil (from plant or animal) with a multi-functional hydroxyl compound derived from a natural source, such as sorbitol, in presence of an alkali metal salt or base such as potassium hydroxide as a catalyst which also acts to saponify the reaction mixture. The hydroxyl content of the prepared composition depends on the amount of the multi-functional hydroxyl compound used in the preparation. In another embodiment, the hydroxyl groups of these compositions are reacted with an isocyanate, such as the polymeric diphenylmethane diisocyanate (also known as 4,4'-diphenyl methane diisocyanate, or MDI) to form polyurethanes in a conventional manner.