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:
Mar. 17, 1981
Filed:
Nov. 01, 1979
Thaddeus F Kroplinski, Old Bridge, NJ (US);
Barton C Case, Hightstown, NJ (US);
NL Industries, Inc., New York, NY (US);
Abstract
The present invention is directed to improvements in non-toxic polyurethane compositions and separatory devices employing the same, such as hollow fiber separatory devices intended to be used in biomedical applications. The separatory device employs at least one separatory membrane suitable for the intended end use application which is secured, potted or sealed in a housing using a cured flexible polyurethane composition. The improvement in the polyurethane composition employed in the separatory device is achieved by reacting at least one NCO-terminated prepolymer and at least one polyol in the presence of a ricinoleic acid reactive catalyst. The catalyst reduces the curing time of the polyurethane resin and because it is sufficiently reactive with the NCO-terminated prepolymer, it is incorporated into the structure of the polyurethane and cannot be released during operation of the separatory device.