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:
Dec. 31, 1985
Filed:
Jun. 27, 1984
Wolfgang Rogler, Erlangen, DE;
Helmut Markert, Nuremberg, DE;
Klaus Kretzschmar, Erlangen, DE;
Gerhard Piecha, Nuremberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
The invention relates to heat-hardenable reaction resin mixtures which contain polyfunctional epoxides, polyfunctional isocyanates and a reaction accelerator as well as, optionally containing customary additives and/or fillers. The invention has the object of achieving reaction resin mixtures which are stable in storage, consist of individual components that are easy to mix, exhibit a prolonged prehardening period and permit at the same time the manufacture of materials which combine the good mechanical properties and the high temperature-cycle resistance of polyurethane structures with the good thermal properties of oxazolidinone and isocyanurate structures. According to the invention, the reaction resin mixtures contain as polyfunctional isocyanates, isocyanate prepolymerisates in the form of reaction products of diphenyl methanediisocyanate and a diol, or of an isocyanate mixture of diphenyl-methanediisocyanate and a polymethylenepolyphenylisocyanate (with a functionality greater than 2) and a diol. The prepolymerisates utilize 0.01 to 0.35 equivalents and preferably 0.05 to 0.2 equivalents of the diol per 1 equivalent of isocyanate; the mixture contains 0.2 to 5 equivalents isocyanate per 1 equivalent of epoxy. The reaction accelerator is a tertiary amine or an imidazole.