Sennics Co., Ltd.

Xiangyun Guo

Jinguo Xing

Zhimin Tang

Hui Li

Xinmin Chen

Yang Gao

Qi Qi

Haibo Zhu

Gan Liang

Jiaqiang Zhang

Xiaomin Ruan

Yanxiang Liu

A compound having anti-aging and discoloration resistance effects and a preparation method therefor are provided. The structure of the compound is represented by formula (I). The compound provides longer-lasting anti-aging performance, and has discoloration resistance. The compound may be used as an anti-aging agent in rubber products, especially rubber tires, and can prevent the aging and deterioration of rubber products or rubber tires due to light, heat, oxygen, and fatigue, during use.

Compound having anti-aging and discoloration resistance effects and preparation method therefor

A polyalkyl p-phenylenediamine antidegradant having a structure represented by Formula I, its intermediates and a preparation method thereof are provided. The polyalkyl p-phenylenediamine antidegradant provides good thermal oxidative aging resistance and UV aging resistance.

Polyalkyl p-phenylenediamine anti-degradants and intermediates and preparation method thereof

A method for preparing a diaryl-p-phenylenediamine compound of Formula I comprises the steps of reacting a compound of Formula II and a compound of Formula III in a condensation dehydrogenation reaction in the presence of a solvent, a hydrogen acceptor, a water-carrying agent, and a catalyst; wherein R, Rand Rare independently selected and each is H, a C1-C8 alkyl, a C3-C8 cycloalkyl, a C1-C8 alkoxy, a C3-C8 cycloalkoxy, or phenyl; a and c are independently selected and each is an integer of 0 to 5, and b is an integer of 0 to 4:

Method for preparing diaryl p-phenylenediamine compounds

A method for preparing an aryl substituted p-phenylenediamine substance is provided. A structural formula of the aryl substituted p-phenylenediamine substance is shown as Formula (I'), where each of R&#x2032; and R&#x2033; is phenyl or o-methylphenyl, and R&#x2032; is same as or different from R&#x2033;; and the method comprises that: a raw material A and a raw material B are reacted in the presence of a hydrogen acceptor and a catalyst to form the aryl substituted p-phenylenediamine substance, the raw material A having a structure shown as Formula (I), the raw material B being cyclohexanone and/or o-methylcyclohexanone and the hydrogen acceptor being a hydrogen acceptor capable of accepting hydrogen for conversion into the raw material B. Raw materials are low in cost and readily available; use of a large amount of water for post-treatment is avoided. The reaction condition is relatively mild, and corrosion to equipment is avoided.

Method for preparing aryl substituted p-phenylenediamine substance

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