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Pre-dispersed masterbatch of scorch-resistant comprehensive accelerator for rubber as well as preparation method

A technology of pre-dispersing masterbatches and accelerators, which is applied in the field of rubber additives. It can solve the problems that the broken crosslinks cannot be replenished, the rubber is prone to scorching, and the vulcanization flattening period is shortened, so as to improve the scorching phenomenon. , to ensure fluidity, to avoid the effect of lack of material and less glue

Inactive Publication Date: 2016-06-15
GUANGDONG DUBA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, the rubber product industry has been pursuing high-temperature rapid vulcanization in order to improve production efficiency; in order to achieve this purpose, it is necessary to use an overspeed accelerator, and the corresponding scorch time is relatively short, which makes the rubber easy to scorch and poor in operation safety; At the same time, after the vulcanization of the rubber compound of the ultra-speed accelerator, because it loses its activity rapidly, the breakage of the crosslink bond cannot be replenished, which causes the vulcanization flat period to be shortened, and vulcanization reduction is easy to occur.

Method used

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  • Pre-dispersed masterbatch of scorch-resistant comprehensive accelerator for rubber as well as preparation method
  • Pre-dispersed masterbatch of scorch-resistant comprehensive accelerator for rubber as well as preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The anti-scorch integrated accelerator pre-dispersed masterbatch for rubber in Example 1 consists of 13 parts of rubber matrix, 60 parts of thiazole accelerator, 15 parts of anti-scorch agent, 10 parts of softener and 2 parts of processing aid.

[0020] The preparation method of this pre-dispersed masterbatch is as follows figure 1 shown, including the following steps:

[0021] S1 Internal mixing step: Preheat the internal mixer to 50-65°C, accurately weigh the rubber matrix, thiazole accelerator, anti-scorch agent, softener and processing aid according to the proportion and put them into the internal mixer for mixing , the mixing time is about 8 to 12 minutes;

[0022] S2 Filtration step: After the raw materials are mixed, they are first sent to a filter for filtration. The filter uses a screen with a mesh size of 120 or more to filter large particles of impurities in the colloidal material, and then the material is sent to a granulator for granulation;

[0023] S3 g...

Embodiment 2

[0024] The composition of the anti-scorch comprehensive accelerator pre-dispersed masterbatch for rubber in Example 2: 15 parts of rubber matrix, 55 parts of thiazole accelerator, 20 parts of anti-scorch agent, 9 parts of softener and 1 part of processing aid; The preparation method of the micelle is the same as that of Example 1; the anti-scorch comprehensive accelerator pre-dispersed masterbatch of Example 2 is obtained. After testing, the Mooney value of the masterbatch is ML(1+4)min, 9.86 at 50°C, and the density at 20°C is 1.44g / cm 3 .

Embodiment 3

[0025] The composition of the anti-scorch comprehensive accelerator predispersed masterbatch for rubber in Example 3: 15 parts of rubber matrix, 60 parts of thiazole accelerator, 10 parts of anti-scorch agent, 12 parts of softener and 3 parts of processing aid; The preparation method of the micelle is the same as that of Example 1; the anti-scorch comprehensive accelerator pre-dispersed masterbatch of Example 3 is obtained. After testing, the Mooney value of the masterbatch is ML(1+4)min, 57.12 at 50°C, and the density at 20°C is 1.45g / cm 3 .

[0026] Anti-scorch comprehensive accelerator pre-dispersed masterbatch particles for rubber provided by the invention, through accelerator M (MBT) (2-thiol benzothiazole) and accelerator DM (MBTS) (dibenzothiazole disulfide) The experimental comparison of the two kinds of accelerators shows that the comprehensive accelerator for rubber of the present invention has a very long scorch period according to the test data of the rheometer. ...

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Abstract

The invention discloses a pre-dispersed masterbatch of a scorch-resistant comprehensive accelerator for rubber. The masterbatch comprises the following components in parts by weight: 8-15 parts of a rubber matrix, 50-60 parts of a thiazole accelerator, 10-20 parts of an anti-scorching agent, 9-12 parts of a softener, and 1-3 parts of a processing auxiliary agent. A preparation method comprises the following steps: (1) a mixing step: the thiazole accelerator, the anti-scorching agent, the processing auxiliary agent and the softener are added into a mixer according to a certain ratio, mixing is carried out for about 30 seconds, the rubber matrix is added, and mixing is carried out for 8-12 minutes at 50-65 DEG C; (2) a granulation step: after mixing of materials, the materials are sent into a granulating machine for granulation. The pre-dispersed masterbatch is used for preparing rubber compounds, and has the advantages of easy dispersion, non-pollution, good processability, etc.; and the masterbatch provides good scorch-resisting effects for rubber.

Description

technical field [0001] The invention relates to a rubber auxiliary agent, in particular to a pre-dispersed masterbatch of an anti-scorch comprehensive accelerator for rubber and a preparation method thereof. Background technique [0002] In recent years, the rubber product industry has been pursuing high-temperature rapid vulcanization in order to improve production efficiency; in order to achieve this purpose, it is necessary to use an overspeed accelerator, and the corresponding scorch time is relatively short, which makes the rubber easy to scorch and poor in operation safety; At the same time, after the vulcanization begins, the rubber compound of the ultra-speed accelerator loses its activity rapidly, and the breakage of the cross-linking bond cannot be replenished, which causes the vulcanization flat period to be shortened, and vulcanization reduction is easy to occur. Contents of the invention [0003] The technical problem to be solved by the present invention is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/08C08L91/00C08K5/47C08K5/103C08K5/09
CPCC08L23/16C08L2205/02C08L2205/03C08L23/0853C08L91/00C08K5/47C08K5/103C08K5/09
Inventor 陈颖
Owner GUANGDONG DUBA NEW MATERIAL CO LTD
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