Low particulate lubricious coating with vinyl pyrrolidone and acidic polymer-containing layers
Embodiments of the disclosure include lubricious coatings. In an embodiment the disclosure includes a lubricious coating for a medical device including first and second coated layers. The first coated layer is between the second coated layer and the device surface and includes a vinyl pyrrolidone polymer and a photo reactive group. The second coated layer is in direct contact with the first coated layer and is a top coating that includes an acrylic acid polymer. The second coated layer can optionally include photoreactive groups. The coating was found to have a very low number of particulates (e.g., 10 μm or greater) which is very desirable for in vivo use.
1. A lubricious coating comprising:
a first coated layer comprising a vinyl pyrrolidone polymer and photoreactive groups, wherein the photoreactive groups are pendent from the vinyl pyrrolidone polymer or on a first cross-linking agent comprising at least two photoreactive groups, or both; and
a second coated layer that is a top coating comprising an acrylic acid polymer and which is different in composition than the first coated layer, wherein the second coated layer is in direct contact with the first coated layer, wherein the first coated layer is between the second coated layer and a substrate surface;
wherein the first coated layer does not include the acrylic acid polymer of the second coated layer and the second coated layer does not include the vinyl pyrrolidone polymer of the first coated layer.
2. The coating of claim 1 wherein the second coated layer further comprises an acrylamide polymer comprising at least one photo reactive group.
3. The coating of claim 2 wherein the acrylamide polymer comprises acrylamide-, 2-acrylamido-2-methylpropanesulfonate (AMPS)-, and poly(ethylene glycol)-containing subunits.
4. The coating of claim 2 , wherein the vinyl pyrrolidone polymer and the acrylamide polymer are present in the coating at a weight ratio in the range of approximately 3:1 to 1:3 (wt./wt.), respectively.
5. The coating of claim 2 , wherein the acrylic acid polymer and the acrylamide polymer are present in the coating at a weight ratio in the range of approximately 2:1 to 1:2 (wt./wt.), respectively.
6. The coating of claim 1 wherein comprising a first cross-linking agent, wherein the vinyl pyrrolidone polymer and the first cross-linking agent are present in the coating at a weight ratio in the range of about 8:1 to about 20:1 (wt./wt.).
7. The coating of claim 1 comprising a first or second cross-linking reagent, wherein at least one of the first and second cross-linking agent(s) is a compound of formula Photo 1 -LG-Photo 2 , wherein Photo 1 and Photo 2 , independently represent at least one photoreactive group and LG represents a linking group comprising at least one silicon or at least one phosphorus atom, there is a covalent linkage between at least one photoreactive group and the linking group, wherein the covalent linkage between at least one photoreactive group and the linking group is interrupted by at least one heteroatom.
8. The coating of claim 7 at least one of the first and second cross-linking agents is a compound of formula selected from:
wherein R 1 , R 2 , R 8 and R 9 are any substitution; R 3 , R 4 , R 6 and R 7 are alkyl, aryl, or a combination thereof; R 5 is any substitution; and each X, independently, is O, N, Se, S, or alkyl, or a combination thereof;
wherein R 1 and R 5 are any substitution; R 2 and R 4 can be any substitution, except OH; R 3 can be alkyl, aryl, or a combination thereof; and each X, independently, is O, N, Se, S, alkyl or a combination thereof;
wherein R 1 , R 2 , R 4 and R 5 are any substitution; R 3 is any substitution; R 6 and R 7 are alkyl, aryl, or a combination thereof; and each X, independently, is O, N, Se, S, alkyl, or a combination thereof; and
9. The coating of claim 8 wherein at least one of the first and second cross-linking agent(s) is sodium bis(4-benzoylphenyl) phosphate.
10. The coating of claim 1 , wherein the acrylic acid polymer has an average molecular weight of 150 kDa or greater.
11. The coating of claim 1 , the coating releasing particulates of less than 3,000 particles greater than 10 microns.
12. The coating of claim 1 , wherein the thickness of the first and second coated layers combined is between about 100 and 1000 nm when dry.
13. The coating of claim 1 , wherein (a) the coating exhibits a lubricity when wetted of between 0 and 30 grams of force for at least 10 consecutive testing cycles, or wherein (b) the coating exhibits a durability of lubricity such there is less than a 30 percent increase in measured friction between the average of cycles 1-5 of testing and cycles 10-15 of testing, or both (a) and (b).
14. The coating of claim 1 , wherein (a) the coating exhibits reduced platelet accumulation, (b) reduced fibrin accumulation, or both (a) and (b), as compared to a control coating having only the first coated layer.
15. The coating of claim 14 , wherein (a) the coating exhibits reduced platelet accumulation, the reduction being greater than 20% of the control, greater than 30% of the control, greater than 40% of the control, greater than 50% of the control, greater than 60% of the control, or greater than 70% of the control, or (b) reduced fibrin accumulation, the reduction being greater than 25% of the control, greater than 50% of the control, greater than 60% of the control, greater than 70% of the control, greater than 80% of the control, or greater than 90% of the control, or both (a) and (b).
16. A medical device comprising the coating of claim 1 .
17. The medical device of claim 16 , wherein the substrate comprises polyamide, polyimide, polyether block amide (PEBAX), polyether ether ketone (PEEK), high density polyethylene (HDPE), polyethylene, polyurethane, or polyethylene vinyl acetate.
18. The medical device of claim 17 , the medical device comprising a catheter.
19. The medical device of claim 16 , the medical device comprising a metal substrate, or that is selected from the group consisting of embolic protection devices and mapping/ablation catheters.
20. The medical device of claim 1 wherein the coating further comprises a coated layer comprising an extracellular matrix protein or peptide, or a protein or peptide that provides hemocompatible or thromboresistant properties.
21. A lubricious coating comprising:
a first coated layer comprising a sole polymeric component that is a vinyl pyrrolidone polymer, and photoreactive groups, wherein the photoreactive groups are pendent from the vinyl pyrrolidone polymer or on a first cross-linking agent comprising at least two photoreactive groups, or both; and
a second coated layer that is a top coating comprising a sole polymeric component that is an acrylic acid polymer, wherein the second coated layer is in direct contact with the first coated layer, wherein the first coated layer is between the second coated layer and a substrate surface, wherein there is hydrogen bonding between the vinyl pyrrolidone polymer of the first coated layer and the acrylic acid polymer of the second coated layer.
22. The coating of claim 1 wherein the vinyl pyrrolidone polymer of the first coated layer comprises vinyl pyrrolidone polymer with pendent photoreactive groups, and the first coated layer further comprises a vinyl pyrrolidone polymer without photoreactive groups.
23. A lubricious coating comprising:
a first coated layer consisting essentially of a vinyl pyrrolidone polymer and photoreactive groups, wherein the photoreactive groups are pendent from the vinyl pyrrolidone polymer or on a first cross-linking agent comprising at least two photoreactive groups, or both; and
a second coated layer that is a top coating consisting essentially of an acrylic acid polymer, wherein the second coated layer is in direct contact with the first coated layer, wherein the first coated layer is between the second coated layer and a substrate surface.