Preparation method for styrenated diphenylamine antioxidant

Abstract

The invention relates to a preparation method for a styrenated diphenylamine antioxidant. The preparation method comprises the following steps: reacting polydiphenylamine with styrene by taking active white soil subjected to acidy treatment as a catalyst to generate a styrenated diphenylamine mixture; removing diphenylamine and styrene which are not completely reacted through distillation to obtain distillation raffinate, namely the styrenated diphenylamine antioxidant.

Description

technical field

[0001] The invention belongs to the field of chemical synthesis, in particular to a preparation method of a styrenated diphenylamine antioxidant. Background technique

[0002] At present, whether it is aerospace lubricants, engine lubricants, or industrial lubricants (such as high-temperature chain oil, compressor oil, heat transfer oil, etc.), high-performance antioxidants are required, and this requirement is Getting harsher. The antioxidant zinc dialkyldithiophosphate (ZDDP) in general engine oil can no longer meet the requirements of environmental protection and high-temperature performance, so it is necessary to develop new high-temperature antioxidants. The above requirements can be met by styrenated diphenylamine antioxidants. Styrenated diphenylamine is suitable for black and light-colored rubber products. It can replace anti-aging agents SP, BLE, anti-aging agents A, D, and RD in equal amounts. It has good protection against thermal-oxidative aging...