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. 25, 1977
Filed:
Dec. 08, 1976
K A Panandiker, Maple Grove, MN (US);
David E Tweet, Carpentersville, IL (US);
Cargill, Incorporated, Minneapolis, MN (US);
Abstract
A method for manufacturing partially blocked isocyanate curing agents in which a polyisocyanate and a blocking agent for the polyisocyanate are separately and continuously metered into a reaction zone in predetermined nonstoichiometric proportion under reaction conditions, and in which the reaction mixture is continuously withdrawn from the reaction zone to provide a partially blocked isocyanate curing agent product. The partially blocked isocyanate curing agent product may be continuously reacted with a polyhydroxy resin coating precursor at a temperature below the unblocking temperature of the blocking agent in respect of the polyisocyanate to provide a heat curable powder coating composition.