Adhesive article including primer layer and method of making the same

Patent metadata

Field	Value
Publication number	US-9890302-B2
Application number	US-201214367497-A
Country	US
Kind code	B2
Filing date	Dec 20, 2012
Priority date	Dec 22, 2011
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

Adhesive articles that include a substrate, a silicone polyoxamide-containing primer layer, and a silicone adhesive are disclosed. Methods of making the adhesive articles and the use of a silicone polyoxamide as a primer for improving adhesion between a substrate and a silicone adhesive are also disclosed.

First claim

What is claimed is:

1. An adhesive article comprising:
a substrate;
a primer layer disposed on the substrate, wherein the primer layer comprises a silicone polyoxamide; and
a silicone adhesive disposed on the primer layer.

2. The adhesive article of claim 1 , wherein the primer layer is essentially free of tackifier.

3. The adhesive article of claim 1 , wherein the substrate comprises a thermoplastic, wherein the substrate is a paper substrate, or wherein the substrate is a nonwoven.

4. The adhesive article of claim 3 , wherein the thermoplastic is a polyolefin, a polyester, a polyurethane, or an ethylene-vinyl acetate copolymer.

5. The adhesive article of claim 1 , wherein the silicone polyoxamide has at least two repeat units represented by Formula I:

wherein
each R 1 is independently an alkyl, haloalkyl, arylalkylenyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo;
each Y is independently an alkylene, alkylarylene, or arylalkylene;
each G is independently alkylene, arylene, arylalkylene, alkylarylene, polyoxyalkyene, or polydiorganosiloxane;
R 3 is hydrogen or alkyl or R 3 taken together with G and with the nitrogen to which they are both attached forms a heterocyclic group;
n is independently an integer of 40 to 1500;
p is an integer of 1 to 10; and
an asterisk (*) indicates a site of attachment of the repeat unit to another group in the copolymer.

6. The adhesive article of claim 5 , wherein at least 50 percent of the R 1 groups are methyl, each Y is independently alkylene, each G is independently alkylene, arylene, or polyoxyalkylene, and each R 3 is hydrogen.

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

8. The adhesive article of claim 1 , wherein the silicone adhesive is a crosslinked poly(diorganosiloxane) comprising silanol, alkyl, or aryl terminal groups or a combination thereof, and wherein alkyl and aryl are optionally halogenated.

9. The adhesive article of claim 1 , wherein the adhesive article is a bandage, medical 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 at least one of coating the primer layer or coating the silicone adhesive composition comprises pattern-coating.

12. The method of claim 10 , wherein the primer layer improves adhesion between the substrate and the silicone adhesive.

13. The method of claim 10 , wherein crosslinking the silicone adhesive composition comprises exposing the silicone adhesive composition to radiation to form the silicone adhesive.

14. A method for improving adhesion between a substrate and a silicone adhesive, the method comprising:
coating a primer layer comprising a silicone polyoxamide onto the substrate;
coating a silicone adhesive composition onto the primer layer; and
crosslinking the silicone adhesive composition to form the silicone adhesive.

15. The method of claim 14 , wherein the silicone adhesive is a radiation-crosslinked silicone adhesive.

16. The method of claim 13 , wherein the radiation comprises at least one of electron-beam or gamma radiation.

17. The adhesive article of claim 5 , wherein the silicone polyoxamide has a number average molecular weight in a range from 2000 grams per mole to 40,000 grams per mole.

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

19. The adhesive article of claim 1 , wherein the silicone adhesive comprises a silicate resin tackifier.

20. The adhesive article of claim 1 , wherein the silicone adhesive is not a silicone polyoxamide adhesive.

Assignees

• 3M Innovative Properties Co

Inventors

• Tse Kiu Yuen
• Determan Michael D
• Amos David T
• Munson Daniel C

Classifications

• C08G77/455

  containing polyamide, polyesteramide or polyimide sequences · CPC title

• Y10T428/2843

  including a primer layer · CPC title

• Y10T428/2809

  including irradiated or wave energy treated component · CPC title

• B32B2405/00

  Adhesive articles, e.g. adhesive tapes · CPC title

• C09J2483/003

  in the primer coating · CPC title