A kind of rare earth-transition metal rubber vulcanization accelerator masterbatch and preparation method thereof

Abstract

The invention relates to a rare earth-transition metal rubber vulcanization accelerator masterbatch and a preparation method of the masterbatch, and belongs to the field of rubber ingredient preparation. The masterbatch is prepared by compounding an accelerator, an antioxidant, styrene-butadiene rubber, sulfur, zinc oxide and stearic acid, wherein the accelerator is a dithiocarbamate rare earth-transition metal complex. The preparation method comprises the steps of wrapping double rolls with the styrene-butadiene rubber on an open mill for plastication for 1-10min, then sequentially adding theantioxidant, the accelerator, zinc oxide and stearic acid for mixing at a temperature of 25-90 DEG C for 1-30min, then adding sulfur for mixing for 1-30min, and performing thin passing and batch-outto form the rare earth-transition metal rubber vulcanization accelerator masterbatch. A preparation technology is simple; the processing is convenient, and the prepared rare earth-transition metal rubber vulcanization accelerator masterbatch has an efficient vulcanization promoting effect on natural rubber.

Description

technical field [0001] The invention relates to a rare earth-transition metal rubber vulcanization accelerator masterbatch and a preparation method thereof, in particular to a rare earth-transition metal rubber vulcanization accelerator masterbatch for natural rubber and a preparation method thereof, belonging to the preparation of rubber additives field. Background technique [0002] Dithiocarbamate is a commonly used ultra-fast rubber accelerator, but in actual application, there will be problems such as short Mooney scorch time and poor processing safety when used alone. The inventor disclosed a preparation method of a diethyldithiocarbamate-based rare earth-transition metal bimetallic complex vulcanization accelerator in the patent CN104725432A. This vulcanization accelerator with a double metal core can reduce zinc oxide, hard The dosage of the traditional activation system of fatty acid is higher, and it shows a higher acceleration efficiency in styrene-butadiene rubb...

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Problems solved by technology

[0002] Dithiocarbamate is a commonly used ultra-fast rubber accelerator, but in actual application, there will be problems such as short Mooney scorch time and poor processing safety when used alone

The inventor disclosed a preparation method of a diethyldithiocarbamate-based rare earth-transition metal bimetallic complex vulcanization accelerator in the patent CN104725432A. This vulcanization accelerator with a bimetallic core can reduce zinc oxide, hard The dosage of the traditional activation system of fatty acid is higher, and it shows a higher acceleration efficiency in styrene-butadiene rubber. However, when the accelerator continues to be used in natural rubber, the accelerator will often be deactivated, the vulcanization efficiency is poor, and the vulcanizate is cross-linked. Low density, poor physical and mechanical properties

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