Patent ID: 7635732

Claim:
A process for producing a thermoplastic composition, comprising a first step of melting-kneading a thermoplastic resin and a neutralizing agent, and a second step of melting-kneading the melting-kneaded product obtained in the first step, and a compound (I) represented by the following formula (I) (wherein two R 1 s, two R 2 s, R 4 and R 5 each represent independently a hydrogen atom, an alkyl group having a carbon number of 1 to 8, a cycloalkyl group having a carbon number of 5 to 8, an alkylcycloalkyl group having a carbon number of 6 to 12, an aralkyl group having a carbon number of 7 to 12, or a phenyl group, two R 3 s each represent independently a hydrogen atom, or an alkyl group having a carbon number of 1 to 8, X represents a single bond, a sulfur atom or a —CHR 6 — group, wherein R 6 represents a hydrogen atom, an alkyl group having a carbon number of 1 to 8, or a cycloalkyl group having a carbon number of 5 to 8, A represents an alkylene group having a carbon number of 2 to 8, or a *—COR 7 — group, wherein R 7 represents a single bond, or an alkylene group having a carbon number of 1 to 8, and a symbol * represents a bond with an oxygen atom of a >P—O— portion, one of Y and Z represents a hydroxyl group, an alkoxy group having a carbon number of 1 to 8, or an aralkyloxy group having a carbon number of 7 to 12, and the other represents a hydrogen atom, or an alkyl group having a carbon number of 1 to 8, provided that, when Y is a hydroxyl group, one of R 4 and R 5 represents an alkyl group having a carbon number of 3 to 8, a cycloalkyl group having a carbon number of 5 to 8, an alkylcycloalkyl group having a carbon number of 6 to 12, an aralkyl group having a carbon number of 7 to 12, or a phenyl group).