Black silane primer for improving the adhesion of adhesive tapes to glass surfaces

US9234122B2 · kind B2 · utility

Assignee

• tesa SE · DE

Inventors

• Uwe Schümann · Pinneberg, DE
• Sebastian Dietze · Hamburg, DE
• Kai Ellringmann · Hamburg, DE
• Marco Kupsky · Quickborn, DE
• Thilo Dollase · Hamburg, DE

Key dates

• Filing date: May 6, 2013
• Grant date: Jan 12, 2016
• Expiry date: Aug 20, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J139/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a primer, comprising a mixture dissolved or dispersed in one or more solvents, the mixture composed of a copolymer obtained through copolymerization, preferably free-radical copolymerization, of vinylcaprolactam and/or vinylpyrrolidone, and one or more of the following monomers: a) an acrylic acid ester of a linear primary alcohol containing 2 to 10 carbon atoms in the alkyl group of the alcohol, b) an acrylic acid ester of a branched, non-cyclic alcohol having 4 to 12 carbon atoms in the alkyl group of the alcohol, and c) acrylic acid; one or more organofunctional silanes; a dye or a pigment based on a metal complex or a metal oxide, wherein the metal oxide is of a spinel-type. Such primer provide reliable and excellent adhesion between pressure-sensitive adhesive tapes and hydrophilic surfaces, in particular glass, and ensures at the same time a good coloration of the primer, thereby producing an opaque primer layer.