Pressure-sensitive adhesives and process for preparing them

US8536276B2 · kind B2 · utility

Assignee

• tesa SE · DE

Inventors

• Alexander Prenzel · Hamburg, DE
• Thilo Dollase · Hamburg, DE

Key dates

• Filing date: Oct 23, 2008
• Grant date: Sep 17, 2013
• Expiry date: Apr 4, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K9/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing a pressure-sensitive adhesive based on at least one polymer, in the course of which said at least one polymer is crosslinked, the polymer having functional groups Y and having been admixed, further, with at least one kind of functionalized particles which have at least one nonpolymeric base unit, wherein the particles having a surface modification of the base unit, the surface modification of the particles having at least one kind of functional groups Z, which can not undergo any reaction with the functional group Y and is converted into group X by thermal energy, electromagnetic radiation, particulate radiation and/or sound energy and the crosslinking of the polymer being brought about at least in part by a reaction of the functional groups X of the particles and the functional groups Y of the polymer, and further to pressure-sensitive adhesives based on at least one crosslinked polymer component, the crosslinking of the polymer component being brought about at least in part by incorporation of the functionalized particles, the particles having at least one nonpolymeric base unit and also a surface modification of this base unit, an…