Bhat, who hit out at the independent directors who "totally ignored" his views in a statement that was issued yesterday, also raised questions of propriety, credibility, legitimacy of Mistry continuing as Chairman of Tata Chemicals.
Stating that things changed after Tata Sons board asked Mistry to step down from its Chairmanship, Bhat told PTI: "Without going into legality, I felt that rupture, loss of confidence in the Chairman would significantly impact Tata Chemicals. In many ways there are risks."
When asked what was the main concern he had, Bhat said: "The rupture of the relationship between the Chairman of Tata Sons and the Chairman of Tata Chemicals. The rupture, I am talking about is legal rupture. We can pretend nothing has happened but finally, his discontinuance happened because of loss of confidence."
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Tata Sons holds 19.35 per cent stake in Tata Chemicals.
While insisting that he had the greatest regard for Mistry, Bhat said: "I am talking about the propriety of his (Mistry) being chairman, the credibility and the legitimacy."
He said the board of directors in their meeting did not discuss how to address that risk.
Bhat further said: "Since there was such a big difference between what they put out in public about their views and that my views did not count, therefore, I no longer count for anything in that board. So I quit.