Adhesive primers and articles including the same
Provided are adhesive articles that include a silicone adhesive and a substrate, with a primer layer interposed between the silicone adhesive and the substrate. The primer layer includes a polymer having a polyorganosiloxane pendant group P represented by the formula (I) where each R 1 is independently an alkyl, haloalkyl, arylalkyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo; R2 is an alkyl or an alkenyl group; R3 is an alkylene or an arylalkylene group; and n is an integer in the range of 1 to 20. The primer layer typically improves the adhesion between the silicone adhesive and a wide variety of substrates.
1. An adhesive article comprising:
a substrate;
a primer layer disposed on the substrate; and
a silicone adhesive disposed on the primer layer,
wherein the primer layer comprises a polymer including a polyorganosiloxane pendant group P represented by the formula
wherein
each R 1 is independently an alkyl, haloalkyl, arylalkyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo,
R 2 is an alkyl or an alkenyl group;
R 3 is an alkylene or an arylalkylene group; and
n is an integer in the range of 1 to 20,
wherein the polymer is a polyurethane polymer comprising a first monomer represented by the formula
a second monomer represented by the formula
and;
a third monomer represented by the formula
wherein
R 10 is pendant group P.
2. The adhesive article of claim 1 , wherein the polymer is a polyurethane polymer, and wherein the polyurethane polymer has a molecular weight of 10000 g/mol to 100000 g/mol or optionally 20000 g/mol to 50000 g/mol.
3. The adhesive article of claim 1 , wherein the substrate comprises a thermoplastic substrate, wherein the substrate is a paper substrate, wherein the substrate is a woven substrate, or wherein the substrate is a nonwoven substrate.
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 polymer includes 2 wt. % to 40 wt. %, optionally 2 wt. % to 30 wt. % of a monomer including the polyorganosiloxane pendant group P.
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 is a crosslinked poly(diorganosiloxane) comprising silanol, alkyl, or aryl terminal groups or a combination thereof, and wherein alkyl and aryl are optionally halogenated.
8. The adhesive article of claim 1 , wherein the adhesive article is a medical article.
9. The adhesive article of claim 8 , wherein the medical article is selected from the group consisting of a bandage, a medical tape, a medical drape, an electrode, a dressing, an ostomy pouch, a transdermal drug delivery device, and combinations thereof.
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.