Pre-dispersing masterbatch for rubber accelerator ETU (N,N-ethylene thiourea) and preparation method of pre-dispersing masterbatch

Abstract

The invention discloses pre-dispersing masterbatch for an rubber accelerator ETU (N,N-ethylene thiourea) and a preparation method of the pre-dispersing masterbatch. The pre-dispersing masterbatch comprises components in parts by weight as follows: 72-82 parts of ETU, 8-16 parts of rubber carriers, 2-4 parts of EVA (ethylene vinyl acetate copolymer) resin, 1-3 parts of epoxidized methyl acetorieinoleate, 2-4 parts of saturated fatty acid zinc, 1-8 parts of naphthenic oil and 1-3 parts of color masterbatch. The pre-dispersing masterbatch for the rubber accelerator ETU is convenient to store, transport and weigh, the preparation method of the pre-dispersing masterbatch is simple and high in operability, original activity of ETU can be guaranteed, the problems that ETU is prone to agglomeration and is non-uniform in dispersion when directly put into rubber for mixing are solved, the problem of ETU dust pollution can be solved, and the health problem of an operator caused by inhalation of ETU dust is solved; besides, the masterbatch is colored, so that material identification and management are facilitated, mistaken charging caused by the operator during feeding for follow-up rubber product mixing is avoided, and the application of the color masterbatch has no influence on colors of follow-up prepared rubber products.

Description

technical field [0001] The invention relates to the technical field of rubber accelerators and their preparation, in particular to a rubber accelerator ETU pre-dispersed masterbatch and a preparation method thereof. Background technique [0002] ETU, namely N, N-ethylene thiourea, is a white powder with a relative density of 1.42 to 1.43, soluble in ethanol, methanol, ethylene glycol and pyridine, slightly soluble in water, insoluble in acetone, toluene and gasoline, odorless Bitter, moderately toxic, often carcinogenic, with a melting point of 190-204 °C, flammable, and the mixture of dust and air is explosive. ETU can be used as an accelerator for various rubbers such as chloroprene rubber, CSM rubber, and CPE rubber to improve the aging resistance and mechanical properties of vulcanized rubber. ETU can quickly vulcanize chloroprene rubber without scorch safety, and can be used as an activator and secondary accelerator for low-sulfur or sulfur-free vulcanization of other ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a rubber accelerator ETU pre-dispersed masterbatch and its preparation method in view of the deficiencies in the prior art. The rubber accelerator ETU pre-dispersed masterbatch is convenient for storage, transportation and weighing , can ensure the original activity of ETU, and solve the problems of easy agglomeration and uneven dispersion of ETU directly put into rubber for mixing, and at the same time, it can solve the problem of ETU dust pollution and avoid the health problems of operators caused by inhaling ETU dust ; and the masterbatch is colored, which is convenient for material identification and management, and avoids misfeeding by operators during the subsequent mixing and feeding of rubber products, and the use of color masterbatches does not affect the color of the subsequent prepared rubber products