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In this paper, we investigate the idea that the decay of a curvaton iskinematically blocked and show that the coupling constant for curvaton decaycan be as large as ${\cal O}(1)$. We also find in this case the lower bound ofthe Hubble parameter at horizon exit from big bang nucleosynthesis (BBN) is$H_\ast \gae 7.2 \times 10^{-9}M_P \sim 10^{10} {GeV}$. Similar to conventionalcurvaton scenario, the nonlinear parameter can be as large as $f_{NL}=100$.

Kinematically Blocked Curvaton