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. 06, 1992
Filed:
Oct. 08, 1991
Applicant:
Inventors:
John J Merianos, Middletown, NJ (US);
Paul Garelick, South Plainfield, NJ (US);
Assignee:
ISP Investments Inc., Wilmington, DE (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08C / ; C08F / ;
U.S. Cl.
CPC ...
424 7824 ; 424 7825 ; 424484 ; 424486 ;
Abstract
A process for preparing a water-insoluble PVP-iodine product which comprises intimately mixing water-insoluble PVP, about 10 to 20% by weight of iodine powder and about 0.05 to 1% by weight of isopropanol, heating the reaction mixture at a mixing temperature of about 30.degree.-60.degree. C. for about 0.5 to 6 hours, and heating the mixture at a reaction temperature of about 75.degree. to 98.degree. C. for about 10-24 hours, thereupon forming a stable, uniform, free-flowing powder having an available iodine content of about 9-13% and an iodide content of about 4-6%.