Mikroverkapselte Kautschukadditive und Verfahren zu deren Herstellung

Die Erfindung betrifft verkapselte Kautschukadditive in Form von Mikrokapseln mit einer polymeren Kapselwand sowie einem mindestens ein Kautschukadditiv enthaltenden Kern. Ebenso betrifft die Erfindung ein Verfahren zur Herstellung von derartigen Mikrokapseln. Die erfindungsgemaessen Mikrokapseln werden bei der Vulkanisation von Natur- und Synthese-Kautschuken eingesetzt.

WO 2007012495 A1 UPAB: 20070404 NOVELTY - Microcapsules (I) with a polymeric capsule wall and a core containing rubber additive(s), in which the capsule wall comprises (A) at least one reactive resin component and (B) at least one polyelectrolyte or ionomer component. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for the production of (I) by (a) dispersing at least one rubber additive in a solution of reactive resin-forming compound(s) and component (B) and (b) forming the capsule wall by adding a catalyst and/or heating. USE - In the vulcanisation of natural and synthetic rubber (claimed). ADVANTAGE - A polymer-based formulation with a high sulfur content for rubber vulcanisation, which keeps the sulfur apart from the rest of the rubber mixture under mastication and storage conditions but releases it at a rate appropriate to the process under vulcanisation conditions.