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:
Feb. 01, 1983
Filed:
Mar. 10, 1982
Jurgen Fock, Dusseldorf, DE;
Dietmar Schedlitzki, Essen, DE;
Ulrich Holtschmidt, Essen, DE;
Wilhelm Ahrens, Essen, DE;
Th. Goldschmidt AG, Essen, DE;
Abstract
The invention relates to a hardenable adhesive, which contains as effective components at least one polyol and one polyisocyanate and/or their prepolymers as well as additionally conventional additives, such as, accelerators, gluing auxiliaries, pigments and/or fillers. It is characteristic of the inventive adhesive that it contains, as a polyol, the reaction product of a novolak of average molecular weight from 300 to 1200 with an oxirane of the general formula ##STR1## in which R.sup.1 is hydrogen, or an optionally halogenated hydrocarbon group with 1 to 4 carbon atoms or the --CH.sub.2 OR.sup.2 group, in which R.sup.2 represents an alkyl or an alkenyl group, the R.sup.1 group within the polymeric molecule being the same or different, there being added, on the average, 1 to 7 moles of the oxirane per hydroxyl group of the novolak, and the polyol and the polyisocyanate being present in such a ratio that 0.95 to 1.25 isocyanate groups of the polyisocyanate correspond to one hydroxyl group of the polyol. The inventive adhesives are liquid, adhere well to plastic surfaces and have a high peel strength. They are resistant to the effects of water and moisture.