Rubber accelerator tetrabutylthiuram disulfide pre-dispersed masterbatch and preparation method thereof

A technology of tetrabutylthiuram disulfide and pre-dispersed masterbatch particles, which is applied in the field of rubber additives and its preparation, can solve the problems of long rubber mixing cycle, poor fluidity, and low efficiency, and improve the mixing effect , reduce dust pollution, good flow characteristics

Active Publication Date: 2018-05-18
NINGBO ACTMIX POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the liquid additive is put into the internal mixer and the rubber is mixed, the mixing is slow due to the polarity difference between it and some rubbers, and the mixing in the internal mixer requires relatively low shear It is carried out under the action of force, and because the liquid additives are mixed into the rubber, the dispersion is slow and the fluidity is poor, resulting in a long rubber mixing cycle and low efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The rubber accelerator tetrabutylthiuram disulfide pre-dispersed masterbatch of Example 1, in parts by weight, the masterbatch is composed of: 55 parts of tetrabutylthiuram disulfide, 23 parts of white carbon black parts, 6 parts of EPDM rubber, 6 parts of ethylene-propylene diene rubber, 1 part of EVA resin, 1 part of stearic acid, 2 parts of dioctyl adipate, 2 parts of industrial white oil, and 4 parts of rubber oil. The preparation method of this masterbatch comprises the following steps:

[0022] (1) Prepare the sheet rubber matrix;

[0023] (2) Accurately weigh the raw materials required for the preparation of masterbatch according to the proportion;

[0024] (3) Using silica as a carrier, mixing with liquid tetrabutylthiuram disulfide to obtain a solid-state premix;

[0025] (4) Add the premix and the rest of the raw materials into the internal mixer in three separate batches, mix evenly, and discharge after 10 minutes of mixing. The discharge temperature is 60-...

Embodiment 2

[0027] The rubber accelerator tetrabutyl thiuram disulfide pre-dispersed master batch of Example 2, in parts by weight, the master batch is composed of: 55 parts of tetrabutyl thiuram disulfide, 24 parts of white carbon black parts, 12 parts of styrene-butadiene rubber, 1 part of stearic acid, 2 parts of zinc stearate, 2 parts of industrial white oil, and 4 parts of rubber oil. The preparation method of this masterbatch comprises the following steps:

[0028] (1) Prepare the sheet rubber matrix;

[0029] (2) Accurately weigh the raw materials required for the preparation of masterbatch according to the proportion;

[0030] (3) Using silica as a carrier, mixing with liquid tetrabutylthiuram disulfide to obtain a solid-state premix;

[0031] (4) Add the premix and the rest of the raw materials into the internal mixer in three separate batches, mix them evenly, and discharge after 12 minutes of mixing, and the discharge temperature is 60-80 °C to obtain a rubber compound;

[0...

Embodiment 3

[0033] The rubber accelerator tetrabutylthiuram disulfide pre-dispersed masterbatch of Example 3, in parts by weight, the masterbatch is composed of: 56 parts of tetrabutylthiuram disulfide, 25 parts of silicon dioxide parts, 5.5 parts of EPDM rubber, 5.5 parts of EPDM rubber, 1 part of EVA resin, 1 part of stearic acid, 1.5 parts of dioctyl adipate, 1 part of industrial white oil, and 3.5 parts of rubber oil. The preparation method of this masterbatch comprises the following steps:

[0034] (1) Prepare the sheet rubber matrix;

[0035] (2) Accurately weigh the raw materials required for the preparation of masterbatch according to the proportion;

[0036] (3) using silicon dioxide as a carrier, and mixing with liquid tetrabutylthiuram disulfide to obtain a solid-state premix;

[0037] (4) Add the premix and the rest of the raw materials into the internal mixer in three separate batches, mix them evenly, and discharge the material after 14 minutes of mixing.

[0038] (5) Con...

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Abstract

The invention discloses a rubber accelerator tetrabutylthiuram disulfide (TBTD) predispersed master batch which can effectively solve the problem of slow compounding caused by the polarity difference between the liquid TBTD and rubber during direct compounding. The master batch has favorable flow properties in rubber after proportioning, and thus, can be added at a higher charging rate. The master batch has high compatibility, can be tightly combined with rubber in time even under the condition of different polarity from the rubber, and can maintain favorable dispersity under the action of different shearing forces. Besides, the master batch can further enhance the dispersity and flowability of the rubber effective components, improve the compatibility with the rubber, lower the addition amounts of other aids, enhance the rubber production efficiency, reduce the dust pollution and improve the working environment of the workers, and has the function of lowering the rejection ratio of the rubber product. The master batch prepared by the method can effectively maintain the original activity of the TBTD, can not cake at room temperature, is convenient for weighing, and provides great convenience for the subsequent rubber proportioning and compounding.

Description

technical field [0001] The invention relates to the technical field of rubber additives and their preparation, in particular to a rubber accelerator tetrabutylthiuram disulfide pre-dispersed masterbatch and a preparation method thereof. Background technique [0002] Rubber accelerator tetrabutylthiuram disulfide (TBTD) is a thiuram accelerator, dark brown oily liquid at room temperature, soluble in most organic solvents, but insoluble in water. TBTD can be used as a rubber vulcanization accelerator, and can also be used as a vulcanizing agent, with an effective sulfur content of 7.5%. TBTD does not spray frost and does not pollute in the rubber compound, and can be used to manufacture inner tubes, rubber shoes, rubber fabrics, industrial products, etc. [0003] The form of additives required for rubber mixing can be divided into solid and liquid. Morphologically, TBTD is a liquid additive. When the liquid additive is put into the internal mixer and the rubber is mixed, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L23/08C08L91/06C08L91/00C08L9/06C08K13/02C08K5/40C08K3/36C08K5/09C08K5/11C08K5/098C08K3/26B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08L9/06C08L23/16C08L2205/02C08L2205/025C08L2205/03C08L2205/035C08L23/0853C08L91/06C08L91/00C08K13/02C08K5/40C08K3/36C08K5/09C08K5/11C08K5/098C08K2003/265
Inventor 连千荣李海锋
Owner NINGBO ACTMIX POLYMER
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