RECORDING MEDIUM LUBRICATING MATERIAL AND RECORDING MEDIUM

摘要

PURPOSE:To obtain the recording medium which is excellent in friction resistance and wear resistance by using the recording medium lubricating material contg. specific 3-branch type alkyl silane. CONSTITUTION:The recording medium lubricating material contg. the 3-branch type alkyl silane expressed by formula I is used. In formula I, R1 denotes an alkyl group, amino group and carboxyl group branched to 3 or an alkyl group contg. an ether bond; R2 to R4 include halogen, alkoxy group, acetoxy group or hydroxy group. The Si parts of the alkylsilane of the 3-branch type alkyl silane used for the lubricating layer 3 array near the surface of the recording layer 2 and the alkyl chains array further from the surface of the recording layer 2. The Si parts of the 3-branch type alkyl silanefilm formed in such a manner generate the covalent bond with the surface of the recording layer 2 and form the film of the 3-branch type alkyl silane improved in the density of the alkyl chain on the surface of the recording layer 2. The recording medium having the excellent friction resistance and durability is obtd. in this way.