Strippable systems based on acrylic block copolymers

US6723407B2 · kind B2 · utility

Assignee

• tesa AG · DE

Inventors

• Thilo Dollase · Hamburg, DE
• Marc Husemann · Hamburg, DE
• Bernd Lühmann · Norderstedt, DE

Key dates

• Filing date: Feb 13, 2002
• Grant date: Apr 20, 2004
• Expiry date: Feb 13, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24959
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Strippable systems comprising at least one pressure sensitive adhesive based on at least one block copolymer, wherein said at least one block copolymer is based at least in part on (meth)acrylic acid derivatives, the block copolymers containing at least the unit P(A)-P(B)-P(A) composed of at least one polymer block P(B) and at least two polymer blocks P(A), whereP(A) independently of one another represent homopolymer or copolymer blocks of monomers A, the polymer blocks P(A) each having a softening temperature in the range from +20° C. to +175° C.,P(B) represents a homopolymer or copolymer block of monomers B, the polymer block P(B) having a softening temperature in the range from −100° C. to +10° C., andthe polymer blocks P(A) and P(B) are not homogeneously miscible with one another.