Thanee said:
Neither is Telepathic Bond.
It's just a silent form of communication.
True. However, Mind Blank does not merely limit mind affecting effects.
It also disallows the acquisition of information mentally: "as well as information gathering by divination spells or effects".
Telepathic Bond is a divination spell that allows the others in the group to gather information (i.e. they get to hear what you have to say telepathically). It does it so well that it even overcomes language differences.
So from a literal reading of the two spells, the target of Mind Blank could also be a target of a Telepathic Bond, however, none of the other characters in the bond could hear his thoughts.
The protected character could, however, listen in on the conversation, he just could not participate.
Now, a really strict interpretation of "The subject is protected from all devices and spells that detect, influence, or read emotions or thoughts." would be that he could not even hear the conversation and not be affected by Telepathic Bond. The reason is that if he could hear the conversation (potentially of creatures that he could not otherwise communicate with), then it is influencing him. However, I think the word influence here means "magical influence", for example, domination (as per "No special power or influence is established as a result of the bond."), and not the generic influencing of being influenced whenever you hear something.
So he can hear, but he cannot talk through the bond.