Activatable adhesive compositions and linerless labels and tapes comprising same

Patent metadata

Field	Value
Publication number	US-12077620-B2
Application number	US-202217728166-A
Country	US
Kind code	B2
Filing date	Apr 25, 2022
Priority date	Sep 30, 2016
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

Activatable adhesive compositions are disclosed. The activatable adhesive compositions comprise a two-stage polymer particle, comprising a first stage comprising a hydrophilic acrylic polymer having an acid content of less than 200 mg KOH/g, a second stage polymerized within the first stage and comprising a hydrophobic acrylic polymer, and a tackifier soluble in the first stage and the second stage. Further, linerless labels and tapes comprising activatable adhesive compositions are disclosed. Still further, methods for adhering a first substrate to a second substrate using an activatable adhesive composition are also disclosed.

First claim

The invention claimed is:

1. A pressure sensitive adhesive composition wherein the activatable adhesive composition comprises:
a first stage comprising a hydrophilic acrylic polymer with a first Hansch value having an acid content of less than 200 mg KOH/g;
a second stage polymerized within the first stage and comprising a hydrophobic polymer with a second Hansch value larger than the first Hansch value; and
a tackifier soluble in the first stage and the second stage.

2. A linerless label comprising the pressure sensitive adhesive composition of claim 1 .

3. A linerless tape comprising the pressure sensitive adhesive composition of claim 1 .

4. A heat seal coating comprising the pressure sensitive adhesive composition of claim 1 .

5. A method for adhering a first substrate to a second substrate, comprising:
applying the activatable adhesive composition of claim 1 to a surface of the first substrate;
heating the activatable adhesive composition; and
bringing the surface of the first substrate into contact with a surface of the second substrate.

Assignees

• Rohm & Haas

Inventors

• Einsla Melinda L
• Himmelberger Daniel W
• Griffith Jr William B
• Zolynski Sarah

Classifications

• G09F2003/025

  Activatable adhesive · CPC title

• G09F2003/0241

  Repositionable or pressure sensitive adhesive · CPC title

• G09F3/02

  Forms or constructions (layered products B32B) · CPC title

• C09J133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• C09J5/06

  involving heating of the applied adhesive · CPC title