Method for preparing vulcanizing agent 3,4-dichlorobenzoyl peroxide

Abstract

The invention relates to a preparation method for the vulcanizing agent of 3, 4-dichloro benzoyl peroxide, belonging to the technical field of vulcanizing agent preparation, which comprises the steps as follows: A) sodium hydroxide solution, hydrogen peroxide, water, surfactant and solvent are put in a reaction device and stirred, and the temperature is adjusted to obtain the base material for reaction; B) 3, 4-dichloro benzoyl chloride is added into the base material for reaction, and thermal insulation is conducted to obtain the reactant; C) the reactant is separated, then washed, dried again to obtain the 3, 4-dichloro benzoyl peroxide, finally the 3, 4-dichloro benzoyl peroxide is kneaded and ground to obtain the finished product of paste-shaped vulcanizing agent of 3, 4-dichloro benzoyl peroxide; wherein, the diluent is added in at least in one or more than one of the A), B) and C) steps. The preparation method for the vulcanizing agent of 3, 4-dichloro benzoyl peroxide has the advantages that process steps are simple; equipment using and process requirements are not strict; and the obtained finished product has good stability which provides safety guarantee for storage, transportation and application and which is beneficial to utilization and popularization of the product.

Description

technical field The invention belongs to the technical field of preparation of vulcanizing agents, in particular to a preparation method of vulcanizing agent 3,4-dichlorobenzoyl peroxide. Background technique The English name of 3,4-dichlorobenzoyl peroxide is: 3,4-dichloro benzoyl peroxide. Its molecular formula is: C 14 h 6 Cl 4 o 4 ; Molecular weight: 380.10; Structural formula: 3,4-Dichlorobenzoyl peroxide is referred to as DS4 for short. It is a diacyl organic peroxide and is a free radical donor used as a chemical additive. The mechanism of action is: its peroxy group-O-O - Decomposes to form two free radicals by homolysis of bonding pair electrons. Before, there was a patent application for the preparation method of 3,4-dichlorobenzoyl peroxide (proposed by the applicant, the application number is: 200810019045.8), and the preparation method thereof was introduced. However, B34 is an unstable substance, because it will decompose when heated even at a relativel...

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Problems solved by technology

However, B34 is an unstable substance, because it will decompose when heated even at a relatively low temperature, which will bring safety hazards to transportation, storage and processing. Therefore, generally, 3,4-2 Benzoyl chloroperoxide is sold as finished product unless stringent shipping, storage and processing measures are taken

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