Adhesive article and method of making the same

Patent metadata

Field	Value
Publication number	US-10369247-B2
Application number	US-201214367476-A
Country	US
Kind code	B2
Filing date	Dec 20, 2012
Priority date	Dec 22, 2011
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

Adhesive articles that include a substrate and a silicone adhesive are disclosed. The articles also include a polymer containing poly(propylene oxide) units and optionally poly(ethylene oxide) units and having a number average molecular weight of at least 1000 grams per mole. The polymer may either be incorporated into the substrate or may be used as a primer on the substrate. If the polymer includes poly(ethylene oxide) units, the copolymer typically has a weight ratio of poly(ethylene oxide) to poly(propylene oxide) of up to 3:1, or if the copolymer has a number average molecular weight of at least 10,000 grams per mole, the weight ratio of poly(ethylene oxide) to poly(propylene oxide) is up to 2:1. Methods of making the adhesive articles are also disclosed.

First claim

What is claimed is:

1. An adhesive article comprising:
a substrate comprising at least one of a thermoplastic polyurethane or a polyester;
a primer layer disposed on the substrate, the primer layer comprising a polymer; and
a silicone adhesive disposed on the primer layer,

wherein the polymer is a copolymer of poly(ethylene oxide) and poly(propylene oxide) having a number average molecular weight of at least 10,000 grams per mole and a weight ratio of poly(ethylene oxide) to poly(propylene oxide) of up to 2:1 or a thermoplastic polyurethane or thermoplastic polyester comprising copolymerized poly(ethylene oxide) and poly(propylene oxide) segments,
wherein the copolymerized poly(ethylene oxide) and poly(propylene oxide) segments have a number average molecular weight of at least 10,000 grams per mole and a weight ratio of poly(ethylene oxide) to poly(propylene oxide) of up to 2:1.

2. The adhesive article of claim 1 , wherein the polymer in the primer layer is the thermoplastic polyurethane or thermoplastic polyester comprising copolymerized poly(ethylene oxide) and poly(propylene oxide) segments, wherein the copolymerized poly(ethylene oxide) and poly(propylene oxide) segments have a number average molecular weight of at least 10,000 grams per mole.

3. The adhesive article of claim 1 , wherein the polymer in the primer layer is a copolymer of only poly(ethylene oxide) and poly(propylene oxide).

4. The adhesive article of claim 3 , wherein the weight ratio of poly(ethylene oxide) to poly(propylene oxide) in the copolymer is up to 1:1.

5. The adhesive article of claim 3 , wherein the polymer in the primer layer is a hydroxyl-terminated, tri-block copolymer of poly(ethylene oxide) and poly(propylene oxide).

6. The adhesive article of claim 1 , wherein the silicone adhesive is a radiation crosslinked silicone adhesive.

7. The adhesive article of claim 1 , wherein the silicone adhesive comprises a crosslinked poly(diorganosiloxane).

8. The adhesive article of claim 1 , wherein the substrate includes a polyester- or polyether-based thermoplastic polyurethane.

9. The adhesive article of claim 1 , wherein the adhesive article is a bandage, tape, or wound dressing.

10. A method of making the adhesive article of claim 1 , the method comprising:
coating the primer layer onto the substrate;
coating a silicone adhesive composition onto the primer layer; and
crosslinking the silicone adhesive composition to form the silicone adhesive.

11. The method of claim 10 , wherein crosslinking the silicone adhesive composition comprises exposing the silicone adhesive composition to radiation to form a radiation-crosslinked silicone adhesive.

12. An adhesive article comprising:
a substrate comprising at least one of a thermoplastic polyurethane or a polyester;
a primer layer disposed on the substrate, the primer layer comprising a copolymer of only poly(ethylene oxide) and poly(propylene oxide) having a number average molecular weight of at least 1000 grams per mole; and
a silicone adhesive disposed on the primer layer,

wherein in the copolymer of only poly(ethylene oxide) and poly(propylene oxide), the weight ratio of poly(ethylene oxide) to poly(propylene oxide) is up to 3:1, with the proviso that if the copolymer has a number average molecular weight of at least 10,000 grams per mole, the weight ratio of poly(ethylene oxide) to poly(propylene oxide) is up to 2:1.

13. The adhesive article of claim 12 , wherein the weight ratio of poly(ethylene oxide) to poly(propylene oxide) in the copolymer is up to 1:1.

14. The adhesive article of claim 12 , wherein the polymer in the primer layer is a hydroxyl-terminated, tri-block copolymer of poly(ethylene oxide) and poly(propylene oxide).

15. The adhesive article of claim 12 , wherein the silicone adhesive is a radiation crosslinked silicone adhesive.

16. The adhesive article of claim 12 , wherein the silicone adhesive comprises a crosslinked poly(diorganosiloxane).

17. The adhesive article of claim 12 , wherein the substrate includes a polyester- or polyether-based thermoplastic polyurethane.

18. The adhesive article of claim 12 , wherein the adhesive article is a bandage, tape, or wound dressing.

19. A method of making the adhesive article of claim 12 , the method comprising:
coating the primer layer onto the substrate;
coating a silicone adhesive composition onto the primer layer; and
crosslinking the silicone adhesive composition to form the silicone adhesive.

20. The method of claim 19 , wherein crosslinking the silicone adhesive composition comprises exposing the silicone adhesive composition to radiation to form a radiation-crosslinked silicone adhesive.

Assignees

• 3M Innovative Properties Co

Inventors

• Fung Simon S
• Determan Michael D
• Tse Kiu-Yuen
• Amos David T

Classifications

• C08G18/758

  containing two or more cycloaliphatic rings · CPC title

• C08G18/4837

  and other oxyalkylene units · CPC title

• C08G77/20

  containing silicon bound to unsaturated aliphatic groups · CPC title

• C09J7/25

  based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds · CPC title

• C08L83/00

  Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers · CPC title