US 11,814,530 B2
Stretchable electrically conductive ink compositions
Robert P. Cross, Rocky Hill, CT (US); Wenhua Zhang, Farmington, CT (US); Zhan Yang, Rocky Hill, CT (US); Jiangbo Ouyang, Wallingford, CT (US); Yu Chen, Glastonbury, CT (US); Lynnette M. Hurlburt, Manchester, CT (US); and Darel L. Gustafson, Shelton, CT (US)
Assigned to HENKEL AG & CO, KGaA, Duesseldorf (DE)
Filed by HENKEL IP & HOLDING GMBH, Duesseldorf (DE)
Filed on Jul. 8, 2021, as Appl. No. 17/370,053.
Application 17/370,053 is a continuation of application No. PCT/US2019/067092, filed on Dec. 18, 2019.
Claims priority of provisional application 62/794,181, filed on Jan. 18, 2019.
Prior Publication US 2021/0340398 A1, Nov. 4, 2021
Int. Cl. C09D 11/52 (2014.01); C09D 11/033 (2014.01); C09D 11/037 (2014.01); C09D 11/102 (2014.01)
CPC C09D 11/52 (2013.01) [C09D 11/033 (2013.01); C09D 11/037 (2013.01); C09D 11/102 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A stretchable conductive ink composition comprising:
a polymer,
conductive flake,
conductive beads, and
an additive,
wherein initial resistivity is measured before elongation,
wherein the resistivity at 50% elongation is no more than about 10 times the initial resistivity, and
wherein the additive and the polymer have a difference in solubility parameter greater than about 2;
wherein the ratio of conductive flake to conductive bead is in the range of about 98:2-55:95 by volume.