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:
May. 03, 1988
Filed:
Mar. 31, 1986
Douglas L Hunter, Lake Jackson, TX (US);
David E Schiff, Lake Jackson, TX (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
This invention is a polyurethane-urea elastomer which is the reaction product of a reaction mixture comprising (1) a liquid active hydrogen-containing composition which comprises a relatively high equivalent weight active hydrogen-containing compound, and an amine-terminated, relatively low equivalent weight compound, (2) a polyisocyanate which is present in an amount to provide about 0.8 to about 1.5 isocyanate groups per active hydrogen-containing group present in the mixture, and (3) a catalytically effective amount of a bismuth carboxylate catalyst. With the use of the bismuth carboxylate catalyst, excellent pot-life, yet rapid cures are achieved. In addition the so-called 'green strength' of the elastomer, i.e., its physical strength at the time of its removal from the mold, is improved with the practice of this invention. Further, the post-cured elastomer exhibits excellent properties.