Rubber use high dispersing insoluble sulfur pre-dispersion mother colloidal particle and preparation method thereof

Abstract

The invention relates to a rubber use high dispersing insoluble sulfur pre-dispersion mother colloidal particle which comprises the following components by weight: 70-90 parts of insoluble sulfur, 7-15 parts of a rubber carrier, 0-8 parts of a softening agent, 1-3 parts of a processing assistant agent and 2 parts of a dispersing active agent. The beneficial effects of the rubber use high dispersing insoluble sulfur pre-dispersion mother colloidal particle are that: the processing method is simple and practical, less in time consuming and energy consuming and high in content of active substances, can reduce adverse effects caused by non active substances on mixed rubber to the greatest extent, can solve the poor dispersion problem of the insoluble sulfur in the actual use process, improves the vulcanization activity, and improves the rubber material performance and batch-to-batch performance stability.

Description

technical field [0001] The invention relates to a rubber additive, in particular to a high-dispersion insoluble sulfur pre-dispersed masterbatch for rubber and a preparation method thereof. Background technique [0002] Pre-dispersed masterbatch is a new form of rubber additive, which has the following advantages: (1) stable storage, convenient transportation and use; (2) reduced loss, convenient and accurate weighing; (3) reduced dust on the operator Injury and environmental pollution; (4) reduce mixing time and reduce energy consumption. (5) Improve the dispersion quality of chemicals and improve the performance stability of the mixed rubber batches. [0003] Insoluble sulfur, referred to as IS in English, is a homopolymer of sulfur, which is chemically and physically inert. It can effectively reduce the accumulation of sulfur in the rubber compound, reduce the scorching tendency of the rubber compound during storage, and prevent the surface of rubber products and semi-fi...

AI Technical Summary

Problems solved by technology

However, in actual production and application, there are still problems of poor dispersion and inconvenient weighing, which seriously limit the advantages of insoluble sulfur and bring troubles to users.

Patent 201310638382.6 discloses an insoluble sulfur masterbatch and its preparation method, but according to the insoluble sulfur raw material used (IS7020, oil-extended 20%) and the amount used in the masterbatch (up to 75%), in the masterbatch The actual active sulfur content is lower, up to 60%, not up to the claimed 75%

At the same time, white oil or stearic acid is used as a dispersant in the preparation method described in this patent, and these two substances have a limited dispersing effect on insoluble sulfur, and to a greater extent, they play a role in softening, plasticizing, and lubricating during extrusion. , so the preparation method disclosed in this patent is difficult to improve the dispersion level of insoluble sulfur in the masterbatch, and the dispersion level is one of the determining factors to realize the most important use purpose of the masterbatch

Poor dispersion of powder in masterbatch particles will firstly lead to fluctuations in the amount of active substances added to masterbatch particles between batches of mixed rubber, and secondly, it will cause poor dispersion of active substances within batches of mixed rubber. It is manifested in the performance of vulcanized rubber declines or fluctuates significantly

In the preparation method described in this patent, the preparation of the masterbatch takes a long time, at least one hour or more, and the operation is cumbersome and the production efficiency is low

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