| 摘要 |
An organic phosphorous compound represented by the following formula (I): <IMAGE> (I) wherein R1, R2, R5 and R6 represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkylcycloalkyl group, an aralkyl group or a phenyl group; R3 represents a hydrogen atom or an alkyl group; R4 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkylcycloalkyl group, an aralkyl group or a phenyl group, or the two R4 may be combined with each other to form a direct bond, a sulfur bond (-S-), or aN optionally substituted methylene group; R7 and R8 represent a hydrogen atom or an alkyl group, or R7 and R8 may be combined with each other to form an alkylene group; A represents an alkylene group; B represents a direct bond or an alkylene group; and one of Y and Z represents a hydroxyl group, an alkoxy group or an aralkyloxy group, and the other one represents a hydrogen atom or an alkyl group; and the organic phosphorous compound is useful as a stabilizer for an organic material.
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