UV curable transparent conductive compositions
AssigneeAllied PhotoChemical, Inc.
InventorRoy C. Krohn
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Abstract
The present invention discloses an ultraviolet light curable transparent conductive composition and method for making such a composition that may be used to produce a transparent conductive coating on a suitable substrate. These coatings may be used in such applications as touch screens, membrane switches, TV screens, and VCRs. The disclosed composition does not contain any significant amount of volatile organic solvents that do not become incorporated in the active layer after curing.
Claims20
A photocurable transparent conductive composition comprising:
- at least one aliphatic acrylated oligomer selected from an aliphatic urethane diacrylate or aliphatic urethane triacrylate;
- an acrylated epoxy oligomer;
- an ethylenically unsaturated monomer having Formula I:
- wherein R1 is hydrogen or substituted or unsubstituted alkyl;
- and R2 is substituted or unsubstituted alkyl having more than 4 carbon atoms, cycloalkyl, cycloalkenyl, or substituted or unsubstituted aryl;
- an electrically conductive powder present in an amount from 20% to 50% of the weight of the transparent conductive composition;
- and
- a photoinitiator,
- wherein the photoocurable transparent conductive composition is curable by ultraviolet light into a transparent conductive coating.
A method for coating a substrate with a photocurable transparent conductive composition, the method comprising:
- applying a transparent conductive composition to the substrate, wherein the transparent conductive composition includes:
- an aliphatic acrylated oligomer selected from an aliphatic urethane diacrylate or aliphatic urethane triacrylate;
- an acrylated epoxy oligomer;
- an ethylenically unsaturated monomer having Formula I:
- wherein R1 is hydrogen or substituted or unsubstituted alkyl;
- and R2 is substituted or unsubstituted alkyl having more than 4 carbon atoms, cycloalkyl, cycloalkenyl, or substituted or unsubstituted aryl;
- a photoinitiator;
- a flow promoting agent;
- and
- an electrically conductive powder present in an amount from 20% to 50% of the weight of the transparent conductive composition;
- and
- illuminating the transparent conductive composition with an UV light sufficient to cause the transparent conductive composition to cure into a transparent conductive coating.
A method for coating a substrate with a photocurable transparent conductive composition, the method comprising:
- applying a transparent conductive composition to the substrate, wherein the transparent conductive composition includes:
- an aliphatic acrylated oligomer selected from an aliphatic urethane diacrylate or aliphatic urethane triacrylate present in an amount from 10% to 40% of the weight of the transparent conductive composition;
- an acrylated epoxy oligomer present in an amount from 3% to 11% of the weight of the transparent conductive composition;
- an ethylenically unsaturated monomer present in an amount from 10% to 40% of the weight of the transparent conductive composition, the ethylenically unsaturated monomer having Formula I:
- wherein R1 is hydrogen or substituted or unsubstituted alkyl;
- and R2 is substituted or unsubstituted alkyl having more than 4 carbon atoms, cycloalkyl, cycloalkenyl, or substituted or unsubstituted aryl;
- a photoinitiator present in an amount from 2% to 10% of the weight of the transparent conductive composition;
- a flow promoting agent present in an amount from 0.1% to 8% of the weight of the transparent conductive composition;
- and
- an electrically conductive powder present in an amount from 20% to 50% of the weight of the transparent conductive composition and
- illuminating the transparent conductive composition with an UV light sufficient to cause the transparent conductive composition to cure into a transparent conductive coating.
Dependencies are inferred from the claim text.