2-mercaptotoluimidazole pre-dispersed masterbatch and preparation method thereof

A technology of mercaptomethylbenzimidazole and pre-dispersed masterbatch particles, which is applied in the field of rubber additives and its preparation, can solve problems such as affecting the dispersibility of rubber products, endangering the health of employees, and inaccurate formula measurement. It is beneficial to the health of workers, shortens the mixing time, and is easy to mix ingredients

Inactive Publication Date: 2018-12-11
NINGBO ACTMIX POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The appearance of MMBI is powdery. During the rubber mixing process, there are problems of sticking to the roller and flying dust, resulting in inaccurate formula measurement and affecting its dispersibility in rubber products. At the same time, the dust will also endanger the health of employees. and environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The 2-mercaptomethylbenzimidazole pre-dispersed masterbatch of embodiment 1, by weight, the composition of the masterbatch is: 72 parts of 2-thiolmethylbenzimidazole, styrene-butadiene rubber 6 parts, EVA resin 4 parts, barium stearate 1 part, naphthenic oil 2 parts, zinc stearate 2 parts, stearic acid monoglyceride 2 parts, pentaerythritol stearate 2 parts, industrial white oil 9 parts . The preparation method of this master batch, comprises the following steps:

[0023] (1) Accurately weigh each raw material required for preparing masterbatch particles according to the proportioning ratio, wherein the rubber carrier is made into a sheet in advance;

[0024] (2) fully mixing 2-mercaptomethylbenzimidazole, rubber carrier, and industrial white oil to obtain the first premix;

[0025] (3) Zinc stearate, stearic acid monoglyceride and pentaerythritol stearate are mixed uniformly and dropped into the first premix obtained in step (2), fully stirred to obtain the second pr...

Embodiment 2

[0027] The 2-mercaptomethylbenzimidazole pre-dispersed masterbatch of embodiment 2, by weight, the composition of the masterbatch is: 70 parts of 2-thiolmethylbenzimidazole, styrene-butadiene rubber 9 parts, EVA resin 2 parts, barium stearate 1 part, naphthenic oil 1 part, zinc stearate 3 parts, stearic monoglyceride 1 part, pentaerythritol stearate 3 parts, industrial white oil 10 parts . The preparation method of this master batch, comprises the following steps:

[0028] (1) Accurately weigh each raw material required for preparing masterbatch particles according to the proportioning ratio, wherein the rubber carrier is made into a sheet in advance;

[0029] (2) fully mixing 2-mercaptomethylbenzimidazole, rubber carrier, and industrial white oil to obtain the first premix;

[0030] (3) Zinc stearate, stearic acid monoglyceride and pentaerythritol stearate are mixed uniformly and dropped into the first premix obtained in step (2), fully stirred to obtain the second premix, ...

Embodiment 3

[0032] The 2-mercaptomethylbenzimidazole pre-dispersed masterbatch of embodiment 3, by weight, the composition of the masterbatch is: 69 parts of 2-mercaptomethylbenzimidazole, ternary ethyl 8 parts of propylene rubber, 5 parts of binary ethylene propylene rubber, 2 parts of naphthenic oil, 1 part of zinc stearate, 1 part of monoglyceride stearate, 4 parts of pentaerythritol stearate, and 10 parts of industrial white oil. The preparation method of this master batch, comprises the following steps:

[0033] (1) Accurately weigh each raw material required for preparing masterbatch particles according to the proportioning ratio, wherein the rubber carrier is made into a sheet in advance;

[0034] (2) fully mixing 2-mercaptomethylbenzimidazole, rubber carrier, and industrial white oil to obtain the first premix;

[0035] (3) Zinc stearate, stearic acid monoglyceride and pentaerythritol stearate are mixed uniformly and dropped into the first premix obtained in step (2), fully stirr...

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PUM

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Abstract

The invention discloses 2-mercaptotoluimidazole pre-dispersed masterbatch and a preparation method thereof. The masterbatch is prepared from the following raw materials in parts by weight: 68 to 72 parts of 2-mercaptotoluimidazole, 9 to 16 parts of a rubber carrier, 1 to 3 parts of zinc stearate, 1 to 2 parts of glyceryl monostearate, 2 to 5 parts of pentaerythritol stearate, and 5 to 12 parts ofindustrial white oil. Rubber is used as the carrier, glyceryl monostearate and zinc stearate are used as dispersing agents, and pentaerythritol stearate and industrial white oil are used as plasticizer, so good dispersibility in the masterbatch is given to MMBI, at the same time, the original activity of the MMBI can be effectively retained, and the problem of dust pollution can be effectively solved; according to the preparation method disclosed by the invention, the dispersity of the raw materials by premixing twice is greatly improved, and uniform composition of the masterbatch obtained bymixing and extrusion is ensured, so that the MMBI is uniformly dispersed in the masterbatch to avoid aggregation or agglomeration.

Description

technical field [0001] The invention relates to the technical field of rubber additives and their preparation, in particular to a 2-mercaptomethylbenzimidazole pre-dispersed masterbatch and a preparation method thereof. Background technique [0002] The molecular formula of 2-mercaptomethylbenzimidazole (ie MMBI) is C 8 h 8 N 2 S, CAS No. 53988-10-6, can be used as anti-aging agent for natural rubber, styrene-butadiene rubber, butadiene rubber, nitrile rubber and latex. MMBI is mainly used as a synergist of other antioxidants, and the combined effect of other antioxidants is usually better than the sum of the effects of other antioxidants used alone. MMBI itself is also a medium-strength non-polluting anti-aging agent, especially suitable for compounds containing ultra-speed accelerators and heat-resistant compounds that do not contain sulfur but contain TMTD. When MMBI is used together with CBS, MBT, thiuram accelerators or dithiocarbamate accelerators, it can act as an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L23/08C08L23/16C08K5/098C08K5/378C08K5/103C08J3/22
CPCC08J3/226C08J2409/06C08J2423/08C08J2423/16C08K5/098C08K5/103C08K5/378
Inventor 连千荣
Owner NINGBO ACTMIX POLYMER
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