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. 21, 1986
Filed:
Aug. 19, 1985
Heinz Gilch, Bad Homburg-Kirdorf, DE;
Hubertus von Voithenberg, Bad Homburg, DE;
Karl-Heinz Albert, Oberursel, DE;
USM Corporation, Farmington, CT (US);
Abstract
Novel, solvent free adhesive compositions comprising a moisture curable polyurethane formed from a first component comprising a diisocyanate, and a second component comprising a substantially linear hydroxy polyester in proportions to provide a prepolymer having from 1.0 to 2.0 percent by weight --NCO groups available for reaction, and a third component comprising a monofunctional reactant present in an amount sufficient to react with 1-40 mole % of the reactive --NCO groups of the product of the prepolymer reaction. A layer of applied adhesive may be exposed to airborne moisture under relatively mild conditions to bring about chain extension of the moisture curable polyurethane, after which the layer of the adhesive composition may be heated to bring it to tacky adhesive condition. The chain extended adhesive composition is storable for at least several days without affecting the bond strength.