The present invention relates to a powder paint composition comprising at
least (a) a thermosetting polymer having functional groups capable of
reacting with .beta.-hydroxyalkylamide units (b) a compound comprising
.beta.-hydroxyalkylamide units and (c) a deceleration agent, capable of
reversibly blocking the functional groups of polymer (a). The
deceleration agent is present in an amount sufficient to block at least
9% of the total amount of functional groups of polymer (a). The present
invention relates also to the use of a specific amine compound as a
deceleration agent in a powder paint composition.