TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): Iodine-substituted diphenylamine compound is reacted with thiol compound such as toluene thiol to obtain intermediate having thiol bonding. The thiol bonding is oxidized to obtain the compound (I). Preferred Compound: The compound (I) is preferably of formula (II), (III) or (IV).Rc-Rf=organic group optionally substituted by 1-30C substituent;X3-X7=X1;andk=1 or 2.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The polymer is synthetic resin or rubber chosen from acrylic rubber. The polymer composition further contains crosslinking agent. SPECIFIC COMPOUNDS - Bis-(4-(toluene-4-sulfonyl)-phenyl)-amine of formula (A) and phenyl-(4-(toluene-4-sulfonyl)-phenyl)-amine are disclosed as the compound (I).    EXAMPLE - (In g) bis(4-iodophenyl)amine (15) and p-toluene thiol (9.29) dissolved in toluene (300 ml), sodium-t-butoxide (17.12) and (1,1'-bis(diphenyl phosphino)ferrocene)palladium (II) dichloride dichloromethane adduct (0.73) were reacted at 80 degrees C for 4 hours. The reaction liquid was returned to room temperature and distilled water (1000 ml) and saturated salt solution (500 ml) were added to the reaction liquid. The reaction liquid was extracted with ethyl acetate and the organic layer was concentrated to obtain intermediate (8.84). The intermediate (8.00) dissolved in tetrahydrofuran (50 ml), acetic acid (150 ml) and 30% hydrogen peroxide solution (11.08) were reacted at 80 degrees C for 2 hours. The reaction liquid was returned to room temperature and the organic layer was separated to obtain bis-(4-(toluene-4-sulfonyl)-phenyl)-amine (8.35) with yield of 90%. Nipol AR22 (RTM: acrylic rubber) (100 parts weight), carbon black (60 parts weight), stearic acid (2 parts weight), bis-(4-(toluene-4-sulfonyl)-phenyl)-amine as anti-aging agent, hexamethylene diamine carbamate (0.5 part weight) and Nocceler DT (RTM: di-o-tolyl guanidine) (2 parts weight) were kneaded to obtain a rubber composition. The crosslinking material produced using the rubber composition had excellent heat resistance.