Electronic devices and precursor articles
A first polymer latex and second polymer latex can be mixed to form a dried primer layer on a substrate to adhere patterned materials having fine lines. The first polymer latex comprises a first polymer and a first surfactant such that a dried coating of the first polymer latex has a surface polarity of at least 50%. The second polymer latex comprises a second polymer and a second surfactant such that a dried coating of the second polymer latex has a surface polarity of less than or equal to 27%. Moreover, a dried coating of the mixture has a surface polarity of at least 15% and up to and including 50%. Primed substrates are useful for preparing electrically-conductive articles having electrically-conductive fine lines directly on a dried primer layer by applying a patterned material to a substrate. Such articles can be used as touch screen displays in various electronic devices.
1. A device comprising a transparent film that comprises:
one or more electrically-conductive metal patterns disposed directly on a transparent polymeric substrate that comprises a transparent polymer support and a dried primer layer disposed on at least one supporting surface of the transparent polymer support, the dried primer layer comprising a mixture of:
a first polymer latex comprising a first polymer and a first surfactant such that a dried coating of the first polymer latex has a surface polarity of at least 50%, and
a second polymer latex comprising a second polymer and a second surfactant that is different from the first surfactant such that a dried coating of the second polymer latex has a surface polarity of less than or equal to 27%,
wherein the dried primer layer has a surface polarity of at least 15% and up to and including 50%, and
wherein each of the one or more electrically-conductive metal patterns comprises a touch region comprising electrically-conductive lines having an average line width of less than 15 μm.
2. The device of claim 1 , wherein the transparent film has an integrated transmittance of at least 88%, and comprises the dried primer layer disposed directly on the transparent polymer support that is a transparent polyester support.
3. The device of claim 1 , wherein at least one of the first polymer and the second polymer comprises a vinyl polymer comprising recurring units derived at least from glycidyl (meth)acrylate.
4. The device of claim 1 , wherein each of the first polymer latex and the second polymer latex comprises a vinyl polymer independently comprising at least 75 weight % and up to and including 90 weight % of recurring units derived from glycidyl (meth)acrylate, based on the total weight of the vinyl polymer.
5. The device of claim 4 , wherein at least one of the first polymer latex and the second polymer latex comprises a vinyl polymer further comprising recurring units derived from an alkyl (meth)acrylate having an ester alkyl group having at least 2 carbon atoms.
6. The device of claim 1 , wherein the weight ratio of the first polymer latex to the second polymer latex in the dried primer layer is from 1:3 and to and including 3:1.
7. The device of claim 1 , wherein the first surfactant is an alkyl sulfonate sodium salt wherein the alkyl group has at least 10 carbon atoms, and the second surfactant is an alkyl phenol sulfate ammonium salt having at least 3 ethylene oxide units.
8. The device of claim 1 , wherein the first surfactant is a sodium α-olefin (C 14 -C 16 ) sulfonate, and the second surfactant is an ammonium salt of a sulfated polyethoxy nonylphenol.
9. The device of claim 1 , wherein the first surfactant is a compound represented by R—CH 2 —CH═CH—CH 2 —S(O) 2 O − Na + wherein R is a C 10 , C 11 , or C 12 hydrocarbon group, or mixtures of such compounds with different R groups that are any of C 10 to C 12 hydrocarbons groups; and the second surfactant is represented by R′-phenyl-(O—CH 2 CH 2 CH 2 ) n —S(═O)O 2 − NH 4 + wherein R′ is a C 8 to C 12 hydrocarbon group, and n is 3 to 10.
10. The device of claim 1 , wherein the first surfactant is present in the dried primer layer in an amount of at least 1 weight % and up to and including 3 weight %, the second surfactant is present in the dried primer layer in an amount of at least 0.35 weight % and up to and including 1.1 weight %, both based on the total dried primer layer weight, and the total amount of the first and second surfactants in the dried primer layer is up to and including 3.35 weight %, based on the total dried primer layer weight.