# US 9,518,199 B2 · PSA polymer of N-butyl acrylate, ethyl acrylate, vinyl acetate, and acid monomer

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- Number: US 9,518,199 B2
- Document ID: US9518199B2
- Status: Granted
- Kind: B2
- Application number: 13/505,390
- Filed: 2010-10-28
- Published: 2012-08-23
- Granted: 2016-12-13
- Earliest claimed: 2009-11-05
- Assignees: BASF SE
- Applicants: Matthias Gerst; Gerhard Auchter; Cornelis Petrus Beyers
- Inventors: Matthias Gerst; Gerhard Auchter; Cornelis Petrus Beyers
- Web page: https://patentgrep.com/patent/US9518199B2

## CPC

- C09J 133/06: of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J 131/04: Homopolymers or copolymers of vinyl acetate
- C09J 133/00: Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J 133/02: Homopolymers or copolymers of acids; Metal or ammonium salts thereof
- C09J 133/08: Homopolymers or copolymers of acrylic acid esters
- C09J 7/385: {Acrylic polymers}
- C09J 125/04: Homopolymers or copolymers of styrene
- C09J 2203/334: as a label
- C09J 2301/302: the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
- C09J 2433/00: Presence of (meth)acrylic polymer
- Y10T 428/2891: including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Described is a pressure-sensitive adhesive (PSA) polymer formed from (i) 50%-95% by weight of n-butyl acrylate, (ii) 1%-20% by weight of ethyl acrylate, (iii) 1%-20% by weight of vinyl acetate, (iv) 0.1%-5% by weight of at least one ethylenically unsaturated acid or ethylenically unsaturated acid anhydride, and (v) 0% to 30% by weight of other ethylenically unsaturated compounds different from the monomers (i) to (iv). The PSA polymer can be used for producing self-adhesive articles, more particularly paper labels or film labels.

## Claims

### Claim 1

A pressure-sensitive adhesive polymer, comprising in a polymerized form:
(i) from 55.25% to 85.25% by weight of n-butyl acrylate,
(ii) from 5% to 7% by weight of ethyl acrylate,
(iii) from 5% to 7% by weight of vinyl acetate,
(iv) 0.2-3% by weight of (meth)acrylic acid, and
(v) 4% to 34% by weight of at least one monomer selected from the group consisting of 2-ethyl hexyl acrylate, styrene, and hydroxypropyl acrylate,
wherein the pressure-sensitive adhesive polymer exhibits a quickstick value of from 6.1 N/25 mm to 8.7 N/25 mm at 5° C. when applied to paper and bonded to polyethylene.

### Claim 2 (depends on 1)

A pressure-sensitive adhesive dispersion, comprising an aqueously dispersed pressure-sensitive adhesive polymer according to claim 1, which is prepared by emulsion polymerization.

### Claim 3 (depends on 1)

A self-adhesive article obtained by coating a carrier material with the pressure-sensitive adhesive polymer according to claim 1.

### Claim 4 (depends on 3)

A self-adhesive label, comprising the self-adhesive article according to claim 3.

### Claim 5 (depends on 3)

A self-adhesive paper label or film label, comprising the self-adhesive article according to claim 3.

### Claim 6 (depends on 2)

A self-adhesive article obtained by coating a carrier material with the pressure-sensitive adhesive dispersion according to claim 2.

### Claim 7 (depends on 6)

A self-adhesive label, comprising the self-adhesive article according to claim 6.

### Claim 8 (depends on 6)

A self-adhesive paper label or film label, comprising the self-adhesive article according to claim 6.