Cationically polymerisable polyacrylate containing alkoxysilane groups and use thereof

• Main Authors: Prenzel, Alexander, Schuh, Christian, Bamberg, Sarah
• Format: Patent
• Language: English
• Published: 13.07.2021
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

The present invention relates to a cationically polymerizable composition comprising or consisting of:(a1) 35 to 90 wt % of at least one (meth)acrylic ester of the general formula (I)in which R1 is selected from H and CH3 and R2 is a linear or branched alkyl chain having 1 to 30 carbons;(a2) 5 to 30 wt % of at least one olefinically unsaturated monomer having at least one cationically polymerizable functional group;(a3) 5 to 30 wt % of at least one alkoxysilane-modified (meth)acrylic ester;(a4) optionally 5 to 30 wt % of at least one N-vinyl-substituted lactam; and(a5) optionally up to 5 wt % of at least one (meth)acrylic ester different from (a1) and/or of at least one olefinically unsaturated monomer which is copolymerizable with components (a1) to (a4).The invention further relates to a pressure sensitive adhesive and also to a structural pressure sensitive adhesive, which are obtainable by polymerization and optional subsequent additional crosslinking of such a composition, and also to the use of these pressure sensitive adhesives.