US 12,460,109 B2
Electrically conductive silicone composition with high adhesion strength
Anja Henckens, Zonhoven (BE); Elisabeth Theunissen, Wilsele (BE); Jing Yang, Shanghai (CN); Yazhou Zhang, Shanghai (CN); and Yifan Chen, Shanghai (CN)
Assigned to Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed by Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed on Jan. 31, 2022, as Appl. No. 17/589,549.
Application 17/589,549 is a continuation of application No. PCT/CN2019/098523, filed on Jul. 31, 2019.
Prior Publication US 2022/0154046 A1, May 19, 2022
Int. Cl. C09J 9/02 (2006.01); C08G 77/00 (2006.01); C08G 77/50 (2006.01); C08K 3/08 (2006.01); C09J 5/00 (2006.01); C09J 183/14 (2006.01); H10F 19/90 (2025.01)
CPC C09J 9/02 (2013.01) [C08G 77/50 (2013.01); C08K 3/08 (2013.01); C09J 5/00 (2013.01); C09J 183/14 (2013.01); H10F 19/906 (2025.01); C08G 77/80 (2013.01); C08K 2003/0806 (2013.01); C08K 2201/001 (2013.01); C09J 2483/00 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An electrically conductive composition consisting of:
a. a silicone resin comprising at least one vinyl-group present in amounts of 11% to 35% by weight of the conductive composition;
b. a silicone cross-linker having at least one Si—H group;
c. electrically conductive particles present in amounts of 50% to 70% by weight of the conductive composition;
d. a solvent present from 0.1 to 10% by weight of the conductive composition;
e. an adhesion promoter;
f. a catalyst;
g. an inhibitor; and
h. optionally, rheological additives, conductivity promotors, dispersing agents, anti-bleed agents, defoamers and mixtures thereof,
wherein the Si—H groups and the vinyl-groups are present in a ratio equal to or greater than 1.3 but equal or less than 10; the composition has a die strength at 150° C. of 1-1.53 kg and an electrical contact resistance after 500 cycles of thermal cycling of 19-29 mOhms from −40° C. to 85° and back to −40° C.; and
wherein the silicone resin is selected from the group consisting of

OG Complex Work Unit Chemistry
wherein a is 1-1000, and R1, R2, R3, R4 are same or different and independently selected from the group consisting of methyl-group, ethyl-group and phenyl-group;

OG Complex Work Unit Chemistry
wherein b+c+x is 1-1000, and R5, R6, R7, R8, R9 and R10 are same or different and independently selected from the group consisting of methyl-group, ethyl-group and phenyl-group;

OG Complex Work Unit Chemistry
wherein d+e is 1-1000, and R11, R12, R13, R14, R15, R16, R17 are same or different and independently selected from the group consisting of methyl-group, ethyl-group and phenyl-group;

OG Complex Work Unit Chemistry
wherein f is 1-1000, and R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28 are same or different and independently selected from the group consisting of methyl-group, ethyl-group and phenyl-group;

OG Complex Work Unit Chemistry
wherein g+h is 1-1000, and R29, R30, R31, R32 are same or different and independently selected from the group consisting of methyl-group and phenyl-group;

OG Complex Work Unit Chemistry
wherein R′ is selected from the group consisting of vinyl, methyl-group, ethyl-group, phenyl-group and mixtures thereof, R″ is selected from the group consisting of methyl-group, ethyl-group, phenyl-group, vinyl-group and mixtures thereof;

OG Complex Work Unit Chemistry
wherein i+j is 1-1000, and R33, R34, R35, R36, R37, R38, R39, R40, R41 are same or different and independently selected from the group consisting of methyl-group and phenyl-group; and mixtures thereof.