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:
Jun. 20, 1978
Filed:
Mar. 03, 1977
Kurt C Frisch, Grosse Ile, MI (US);
Adolfas Damusis, Southfield, MI (US);
Other;
Abstract
A method for producing a urethane elastomer is disclosed. The method involves mixing benzotriazole or a tolyl triazole with an isocyanate terminated prepolymer while the prepolymer is at a temperature sufficiently high that it is a liquid. The proportion of benzotriazole or tolyl triazole used can range from 0.1 to 1.0 equivalent per equivalent of isocyanate in the prepolymer, and must be sufficient to increase the pot life of a mixture of the prepolymer with a diamine, but insufficient to cause substantial impairment of the physical properties of the cured elastomer. A substantially equivalent amount of a diamine is then mixed with the stabilized prepolymer, and the resulting composition is heated to produce the elastomer.