US 2022/0089915 A1 · UV DEBONDABLE PRESSURE SENSITIVE ADHESIVE COMPOSITION AND PRESSURE SENSITIVE ADHESIVE TAPE

Abstract

The present invention provides a UV debondable pressure sensitive adhesive composition and an adhesive tape comprising the same. The UV debondable pressure sensitive adhesive composition comprises a polyacrylate pressure sensitive adhesive, a UV-light polymerizable polyurethane oligomer, a cationic photoinitiator and a free radical photoinitiator, wherein polymerization monomers of the polyacrylate pressure sensitive adhesive comprise an acrylic monomer having an epoxy functional group. The UV debondable pressure sensitive adhesive composition has a bonding force dropping significantly upon UV irradiation, and leaves no residual adhesive.

Claims9

Dependent claims

A UV debondable pressure sensitive adhesive composition, the UV debondable pressure sensitive adhesive comprising:

20 to 80 parts by weight of a polyacrylate pressure sensitive adhesive, polymerization monomers of the polyacrylate pressure sensitive adhesive comprising an acrylic monomer having an epoxy functional group;
20 to 80 parts by weight of a UV-light polymerizable polyurethane oligomer, the UV-light polymerizable polyurethane oligomer having a glass transition temperature upon UV polymerization of 60° C. or more;
0.1 to 5 parts by weight of a cationic photoinitiator;
and
0.1 to 5 parts by weight of a free radical photoinitiator.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/310,145Filed 14 Feb 2020

Priority

CN 201910135583.121 Feb 2019

Published

24 Mar 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification29 codes

C08F 265/06
On to polymers of esters: polymerisation of acrylate or methacrylate esters on to polymers thereof
C09J 7/385
Based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds: acrylic polymers
C08F 2/48
Polymerisation initiated by wave energy or particle radiation: by ultraviolet or visible light
C08F 220/1804
With acrylic or methacrylic acids: c4-acrylate, e.g. butyl acrylate, isobutyl acrylate or tert-butyl acrylate

Uv debondable pressure sensitive adhesive composition and pressure sensitive adhesive tape

Life of this patent

Uv debondable pressure sensitive adhesive composition and pressure sensitive adhesive tape

Life of this patent

Abstract

Claims9