Adhesive composition

Patent metadata

Field	Value
Publication number	US-9333723-B2
Application number	US-201113581750-A
Country	US
Kind code	B2
Filing date	Mar 4, 2011
Priority date	Mar 5, 2010
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

An adhesive composition is disclosed that comprises acrylic adhesive particles having an average diameter of 10 to 100 micrometers obtained by suspension polymerization of an acrylic monomer mixture which comprises a branched C 14-22 alkyl group containing (meth)acrylate and a polar monomer. The adhesive composition may be applied to an adhesive dressing or patch. The adhesive has excellent water vapor permeability, excellent adhesion to skin with low skin irritation when applied, less adhesive residue after peeling, and less keratin damage. The adhesive does not cause wetness or peeling from sweat while being worn.

First claim

What is claimed is:

1. An adhesive composition comprising acrylic adhesive particles having an average diameter of 10 to 100 micrometers obtained by suspension polymerization of an acrylic monomer mixture which comprises a branched C14-22 alkyl group containing (meth) acrylate and a polar monomer,
wherein an amount of the branched C14-22 alkyl group containing (meth) acrylate is 20 mass % to 99 mass % with respect to the total amount of the acrylic monomer mixture including the acrylic adhesive particles.

2. The adhesive composition according to claim 1 further comprising a water-absorbing polymer.

3. The adhesive composition according to claim 2 , wherein water-absorbing polymer is a cross-linked water-absorbing polymer.

4. The adhesive composition according to claim 2 , wherein water-absorbing polymer is particulate.

5. The adhesive composition according to claim 1 further comprising a C1-12 alkyl group containing (meth) acrylate.

6. The adhesive composition according to claim 1 , wherein the polar monomer is a hydroxyl group containing monomer.

7. The adhesive composition according to claim 6 , wherein an amount of the hydroxyl group containing monomer is 1 mass % to 10 mass % with respect to the total amount of the acrylic monomer mixture including the acrylic adhesive particles.

8. The adhesive composition according to claim 1 , wherein the polar monomer is a carboxylic group containing monomer.

9. The adhesive composition according to claim 8 , wherein an amount of the carboxylic group containing monomer is not less than 0.1 mass % and less than 4 mass % with respect to the total amount of the acrylic monomer mixture including the acrylic adhesive particles.

10. The adhesive composition according to claim 2 , wherein an amount of the cross-linked water-absorbing polymer is 0.1 mass % to 10 mass % with respect to the acrylic adhesive particles.

11. A adhesive patch comprising a support layer and an adhesive layer which comprises the adhesive composition according to claim 1 .

12. The adhesive patch according to claim 11 , wherein the support layer comprises nonwoven web.

13. The adhesive patch according to claim 12 , wherein the nonwoven web has a basis weight from 20 g/m 2 to 500 g/m 2 .

14. The adhesive patch according to claim 12 , wherein the nonwoven web has water vapor permeability (MVTR T24) of 500 g/m 2 or more.

Assignees

• Akiyama Hiroko
• Takamatsu Yorinobu
• Kakinuma Yoshiteru
• 3M Innovative Properties Co

Inventors

• Akiyama Hiroko
• Takamatsu Yorinobu
• Kakinuma Yoshiteru

Classifications

• C09J133/02 Primary

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title

• C09J133/066

  containing -OH groups · CPC title

• C09J133/06

  of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical · CPC title

• Y10T428/254

  Polymeric or resinous material · CPC title

• B32B5/16 Primary

  characterised by features of a layer formed of particles, e.g. chips, powder {or granules (layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02)} · CPC title