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:
Aug. 03, 1993
Filed:
Aug. 01, 1991
Daniel Wagner, Basel, CH;
Karl Mechera, Muttenz, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
A process for producing as end-product a heat-hardenable mixture forming thermosetting resin, e.g., a reactive hot-melt adhesive, comprises preparing a first pre-mixture by introducing a meltable heat-hardenable solid resin and liquid resin, flexibilizer, adhesion-promoter and/or plasticizer into a mixing zone in which the components are melted together; preparing a second pre-mixture by mixing with each other a heat-activatable hardener and thixotropic agent, hardening accelerator and/or electrical conductivity-imparting additive; introducing the melt into an extruding zone; and introducing the pulverulent pre-mixture into the extruding zone downstream of the melt-intake for mixing with the first pre-mixture at a temperature below said hardening temperature and in such amount that the content of the second pre-mixture in the end-product ranges from 10 to 50, preferably from 20 to 30 weight-% air occlusions in the melt and the extruded end-product being avoided.