Patent ID: 7714046

Claim:
A process for producing a crystal nucleator composition comprising: a first step pulverizing 95% by mass or more of a crystal nucleator ingredient containing one or two or more kinds of compounds represented by the following general formula (I) to a primary particle diameter of 0.8 μm or smaller with a dry medium-stirring type pulverizer; and a second step mixing and pulverizing the pulverized crystal nucleator ingredient obtained in the previous step and a metal aliphatic carboxylate ingredient containing one or two or more kinds of metal aliphatic carboxylates represented by the following general formula (II): wherein R 1 and R 2 represent alkyl groups having 1 to 4 carbon atoms; R 3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; R 4 represents an aliphatic group having 1 to 30 carbon atoms, optionally having a branch, a hydroxyl group, or a cycloalkyl group; M represents an alkali metal atom or a magnesium atom; m represents 1 when M is an alkali metal atom, and m represents 2 when M is a magnesium atom.