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MDB pre-dispersed masterbatch and preparation method thereof

A technology for pre-dispersing masterbatches and masterbatches, applied in the field of rubber additives and their preparation, can solve problems such as uneven dispersion, dust pollution, acute poisoning, etc., and achieve the effects of uniform composition, improved dispersion and consistent size

Inactive Publication Date: 2019-01-22
NINGBO ACTMIX POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When MDB is used as a rubber accelerator or vulcanizing agent, if MDB is directly added in the rubber mixing process, there will be problems of uneven dispersion and dust pollution. Humans will cause acute poisoning after inhalation of MDB

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The MDB predispersed master batch of embodiment 1, by weight, the composition of this master batch is: 80 parts of 2-(4-morpholino dithio) benzothiazole, 9 parts of EPDM rubber , 3 parts of binary ethylene propylene rubber, 1 part of zinc stearate, 1 part of dibutyl phthalate, 1 part of microcrystalline paraffin, 1 part of polyethylene glycol, and 4 parts of naphthenic oil. The preparation method of this master batch, comprises the following steps:

[0022] (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;

[0023] (2) fully mixing 2-(4-morpholinodithio)benzothiazole, rubber carrier, dibutyl phthalate, and naphthenic oil to obtain the first premix;

[0024] (3) After mixing the microcrystalline paraffin and polyethylene glycol evenly, put it into the first premix obtained in step (2), fully stir to obtain the second premix, and put the sec...

Embodiment 2

[0026] The MDB pre-dispersed masterbatch of embodiment 2, by weight, the composition of this masterbatch is: 78 parts of 2-(4-morpholino dithio) benzothiazole, 10 parts of EPDM rubber , 2 parts of binary ethylene propylene rubber, 2 parts of zinc stearate, 2 parts of dibutyl phthalate, 2 parts of microcrystalline paraffin, 1 part of polyethylene glycol, and 3 parts of naphthenic oil. The preparation method of this master batch, comprises the following steps:

[0027] (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;

[0028] (2) fully mixing 2-(4-morpholinodithio)benzothiazole, rubber carrier, dibutyl phthalate, and naphthenic oil to obtain the first premix;

[0029] (3) After mixing the microcrystalline paraffin and polyethylene glycol evenly, put it into the first premix obtained in step (2), fully stir to obtain the second premix, and put the ...

Embodiment 3

[0031] The MDB pre-dispersed masterbatch of embodiment 3, by weight, the composition of this masterbatch is: 78 parts of 2-(4-morpholino dithio) benzothiazole, 7 parts of EPDM rubber , 4 parts of EVM rubber, 1 part of rubber oil, 2 parts of dibutyl phthalate, 2 parts of microcrystalline paraffin, 1 part of polyethylene glycol, and 5 parts of naphthenic oil. The preparation method of this master batch, comprises the following steps:

[0032] (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;

[0033] (2) fully mixing 2-(4-morpholinodithio)benzothiazole, rubber carrier, dibutyl phthalate, and naphthenic oil to obtain the first premix;

[0034] (3) After mixing the microcrystalline paraffin and polyethylene glycol evenly, put it into the first premix obtained in step (2), fully stir to obtain the second premix, and put the second premix into banburyi...

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PUM

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Abstract

The invention discloses an MDB pre-dispersed masterbatch and a preparation method thereof. By weight part, the masterbatch comprises: 78-81 parts of 2-(4-morpholinyl dithio)benzothiazole, 10-17 partsof a rubber carrier, 1-2 parts of dibutyl phthalate, 1-3 parts of microcrystalline paraffin, 1-2 parts of polyethylene glycol, and 3-8 parts of naphthenic oil. According to the invention, rubber is adopted as the carrier, microcrystalline paraffin and polyethylene glycol are taken as the dispersant to improve the dispersibility of MDB in masterbatch, dibutyl phthalate and naphthenic oil are employed as the plasticizer to reach the effects of synergistic improvement of the fluidity of the masterbatch solution and dispersion promotion, at the same time the original activity of MDB can be effectively retained, and the dust pollution problem can be effectively solved. The preparation method provided by the invention utilizes two premixing to greatly improve the dispersity of all raw materials,ensures that the masterbatch obtained by mixing and extrusion has homogeneous composition, so that MDB can disperse evenly in the masterbatch, thus avoiding agglomeration or clustering phenomenon.

Description

technical field [0001] The invention relates to the technical field of rubber additives and their preparation, in particular to an MDB pre-dispersed masterbatch and a preparation method thereof. Background technique [0002] The molecular formula of 2-(4-morpholinodithio)benzothiazole (ie MDB) is C 11 h 12 N 2 OS 3 , CAS No. 95-32-9, can be used as an aftereffect accelerator for rubber, and can also be used as a vulcanizing agent. The appearance of MDB is white powder with a density of 1.13g / cm 3 , Soluble in chloroform, slightly soluble in carbon disulfide, acetone, insoluble in benzene, petroleum ether, ethanol and water. When MDB is used as a rubber accelerator or vulcanizing agent, if MDB is directly added in the rubber mixing process, there will be problems of uneven dispersion and dust pollution. Humans will cause acute poisoning after inhalation of MDB. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L91/06C08L71/02C08L91/00C08K13/02C08K5/098C08K5/47C08K5/12C08J3/22B29B7/00
CPCB29B7/002C08J3/226C08J2423/16C08J2471/02C08J2491/00C08J2491/06C08K5/098C08K5/12C08K5/47C08K13/02
Inventor 连千荣
Owner NINGBO ACTMIX POLYMER
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