Pressure sensitive adhesives based on polysiloxane-based polymers (polydimethyl siloxane) with aluminium acetylacetonate or titanium acetylacetonate suitable cross linkers

摘要

In a process for the production of polysiloxane pressure sensitive adhesive layers with reduced cold flow by means of coating and drying a one-component polysiloxane pressure-sensitive adhesive solution onto a suitable flat substrate, a complex of a metal ion of the group consisting of calcium, magnesium, zinc, aluminium, titanium, zirconium or hafnium with a low-molecular organic complex former is added to the organic adhesive solution to be coated, whereby the metal ion is only released from the bond to the complex former under the conditions of heating and/or drying of the adhesive solution. The process for making pressure sensitive adhesives based on silicone polymers is suitable for the manufacture of transdermal therapeutic systems (TTS).