Pressure-sensitive adhesive for PVC foils

US9404023B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Carmen-Elena Cimpeanu · Ludwigshafen, DE
• Cornelis Petrus Beyers · Altrip, DE
• Andree Dragon · Speyer, DE

Key dates

• Filing date: Dec 6, 2010
• Grant date: Aug 2, 2016
• Expiry date: Apr 15, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2887
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An adhesive is described, in particular for applications on substrate materials made of flexible PVC, comprising a polymer which is obtainable via free-radical polymerization of ethylenically unsaturated compounds and which is composed of at least 50% by weight of soft acrylate monomers with glass transition temperature below 0° C., at least 1% by weight of ethylenically unsaturated nitriles, at least 1% by weight of hard acrylate monomers with glass transition temperature of at least 60° C., at least 0.1% by weight of ethylenically unsaturated acid monomers, and at least 0.01% by weight of monomers having at least two non-conjugated, polymerizable vinyl groups, where the polymerization reaction takes place via staged polymerization, and at least one portion of the soft acrylate monomers is polymerized in a first polymerization stage, and at least one portion of the hard acrylate monomers is polymerized in a second or subsequent polymerization stage. Uses of the adhesive for the bonding of substrates made of flexible PVC are also described, as also are self-adhesive items with a PVC foil as substrate material and with a coating of the adhesive of the invention.