Interlayer composition for electronic printing
The present disclosure is directed to a composition including a polyvinyl butyral represented by the following formula: wherein A, B and C represent a proportion of corresponding repeat units expressed as a weight percent, wherein each repeat unit is randomly distributed along a polymer chain and wherein the sum of A, B and C is about 100 weight percent; a poly(melamine-co-formaldehyde) based polymer and an anhydride. Devices coated with the composition and cured films formed from the composition comprising conductive features are also provided.
1. A composition comprising a polyvinyl butyral represented by the following formula:
wherein A, B and C represent a proportion of corresponding repeat units expressed as a weight percent, wherein each repeat unit is randomly distributed along a polymer chain and wherein the sum of A, B and C is about 100 weight percent and wherein the polyvinyl butyral is present in the composition in an amount ranging from about 1% to about 20% based on a total weight of the composition;
a poly(melamine-co-formaldehyde) based polymer present in the composition in an amount ranging from about 0.5% to about 15%, based on a total weight of the composition, and
an anhydride.
2. The composition of claim 1 , wherein A is independently from about 80 weight percent to about 88 weight percent; B is independently from about 11 weight percent to about 17.5 weight percent; and C is independently from about 0 weight percent to about 3 weight percent.
3. The composition according to claim 1 , wherein an average molecular weight of the polyvinyl butyral ranges from about 25,000 Daltons to about 150,000 Daltons.
4. The composition according to claim 1 , wherein the poly(melamine-co-formaldehyde) based polymer is selected from the group consisting of a methylated poly(melamine-co-formaldehyde) polymer, a butylated poly(melamine-co-formaldehyde) polymer, an isobutylated poly(melamine-co-formaldehyde) polymer, an acrylated poly(melamine-co-formaldehyde) polymer and a methylated/butylated poly(melamine-co-formaldehyde) polymer.
5. The composition according to claim 1 , wherein the anhydride is selected from the group consisting of acetic anhydride, phthalic anhydride, fluorophthalic anhydride and an unsaturated dicarboxylic acid anhydride.
6. The composition according to claim 5 , wherein the unsaturated dicarboxylic acid anhydride is selected from the group consisting of maleic anhydride, citraconic anhydride, itaconic anhydride and aconitic anhydride.
7. The composition according to claim 1 , wherein the composition further comprises an epoxy resin.
8. The composition according to claim 7 , wherein the epoxy resin comprises an aromatic group.
9. The composition according to claim 7 , wherein the epoxy resin is selected from the group consisting of bisphenol A diglycidyl ether, bisphenol A propoxylate diglycidyl ether, trimethylolpropane triglycidyl ether, neopentyl glycol, diglycidyl ether, poly(propylene glycol) diglycidyl ether and tris-(hydroxyl phenyl)-methane-based epoxy.
10. The composition according to claim 1 , wherein the composition does not contain polyvinyl phenol.
11. The composition according to claim 1 , wherein the composition further comprises a surfactant and a catalyst.
12. A device comprising: a substrate; an interlayer; and conductive features,
wherein the interlayer comprises a thermally cured film formed from a composition comprising:
a polyvinyl butyral represented by the following formula:
wherein A, B and C represent a proportion of corresponding repeat units expressed as a weight percent, wherein each repeat unit is randomly distributed along a polymer chain and wherein the sum of A, B and C is about 100 weight percent and wherein the polyvinyl butyral is present in the composition in an amount ranging from about 1% to about 20% based on a total weight of the composition;
a poly(melamine-co-formaldehyde) based polymer present in the composition in an amount ranging from about 0.5% to about 15%, based on a total weight of the composition, and
an anhydride.
13. The device of claim 12 , wherein A is independently from about 80 weight percent to about 88 weight percent; B is independently from about 11 weight percent to about 17.5 weight percent; and. C is independently from about 0 weight percent to about 3 weight percent.
14. The device of claim 12 , wherein the substrate is selected from the group consisting of a polyethylene naphthalate substrate and a glass substrate.
15. The device of claim 12 , wherein the conductive features comprise an electrically conductive element formed from a nanoparticle conductive ink composition.
16. The device of claim 15 , wherein the nanoparticle conductive ink composition is a silver nanoparticle conductive ink composition.
17. The device of claim 12 , wherein the composition does not contain polyvinyl phenol.
18. A cured film formed from a composition comprising a polyvinyl butyral represented by the following formula:
wherein A, B and C represent a proportion of corresponding repeat units expressed as a weight percent, wherein each repeat unit is randomly distributed along a polymer chain and wherein the sum of A, B and C is about 100 weight percent and wherein the polyvinyl butyral is present in the composition in an amount ranging from about 1% to about 20% based on a total weight of the composition;
a poly(melamine-co-formaldehyde) based polymer present in the composition in an amount ranging from about 0.5% to about 15%, based on a total weight of the composition, and
an anhydride,
wherein the cured film comprises conductive features.
19. The cured film of claim 18 , wherein a conductivity of the cured film ranges from about 50,000 S/cm to about 200,000 S/cm.
20. The cured film of claim 18 , wherein a resistivity of the cured film ranges from about 2.0×10 −5 ohms-cm to about 5.0×10 −6 ohms-cm.