Pre-dispersed rubber auxiliary master batch as well as preparation method and application thereof

A technology of rubber additives and pre-dispersion, which is applied in the field of pre-dispersed rubber additives masterbatch, can solve problems such as poor quality stability during storage

Pending Publication Date: 2022-07-29
SHANDONG HUAJU POLYMER MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

EPDM / EVA system is used as a carrier of rubber additives. Because of its low unsaturated bond content, its quality stability during storage is good, but it is difficult to participate in the crosslinking reaction under the sulfur vulcanization system; BR, NBR, etc. have high saturated bond content. The quality stability of the stored process is relatively poor

Method used

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  • Pre-dispersed rubber auxiliary master batch as well as preparation method and application thereof
  • Pre-dispersed rubber auxiliary master batch as well as preparation method and application thereof
  • Pre-dispersed rubber auxiliary master batch as well as preparation method and application thereof

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preparation example Construction

[0049] The present invention also provides a preparation method of pre-dispersed rubber auxiliary master batch, comprising the following steps:

[0050] After the low Mooney trans-1,4-diene copolymer and the rubber auxiliary are mixed, extruded and granulated, the pre-dispersed rubber auxiliary master batch is obtained.

[0051] In some embodiments of the present invention, the temperature of the internal mixing is 55-65° C., the rotational speed is 45-55 rpm, and the time is 5-10 min. In some embodiments of the present invention, the temperature of the internal mixing is 60° C., the rotational speed is 50 rpm, and the time is 5 min.

[0052]In some embodiments of the present invention, the temperature of the extrusion granulation is 65-75° C., and the rotation speed is 15-25 rpm. In some embodiments of the present invention, the temperature of the extrusion granulation is 70° C., and the rotation speed is 20 rpm.

[0053] In the present invention, the preparation of the pre...

Embodiment 1

[0129] Preparation of pre-dispersed rubber additive masterbatch:

[0130] The low Mooney trans-butadiene rubber (the molar content of the butadiene structural unit is 20% and the Mooney viscosity is 30) and the accelerator N-tert-butyl-2-benzothiazole sulfenamide (NS) according to the mass ratio 50:50 into the internal mixer, internal mixing for 5min, internal mixer speed: 50 rev / min, initial temperature 60 ℃, then extrude and granulate in a twin-screw extruder, screw temperature 70 ℃, speed 20 rpm, make Substance b1 (NS-50 sample) was obtained.

[0131] The mass ratio of the low Mooney trans-butadiene rubber and the accelerator N-tert-butyl-2-benzothiazole sulfenamide (NS) was replaced by 20:80, and the remaining steps were all carried out according to the above steps to obtain Substance b2 (NS-80 sample).

Embodiment 2

[0133] Preparation of pre-dispersed rubber additive masterbatch:

[0134] Put the low Mooney trans-butadiene rubber (the molar content of the butadiene structural unit is 5% and the Mooney viscosity is 5) and zinc oxide (ZnO) into the internal mixer according to the mass ratio of 40:60, and mix for 5 minutes. Machine rotation speed: 50 rev / min, initial temperature 60°C, then extruding and pelletizing in a twin-screw extruder, screw temperature 70°C, rotation speed 20rpm, to obtain material a1 (ZnO-60 sample).

[0135] The mass ratio of the low Mooney trans-butadiene rubber to zinc oxide was replaced with 20:80, and the rest of the steps were carried out according to the above steps to obtain substance a2 (ZnO-80 sample).

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Abstract

The invention relates to the technical field of rubber synthesis and application, in particular to a pre-dispersed rubber additive master batch as well as a preparation method and application thereof. The pre-dispersed rubber auxiliary master batch is prepared from raw materials including a low Mooney trans-1, 4-alkadiene copolymer and a rubber auxiliary; the mass ratio of the low Mooney trans-1, 4-diene copolymer to the rubber auxiliary agent is (20-50): (50-80). The pre-dispersed rubber auxiliary master batch contains a reactive plasticizer low Mooney trans-1, 4-alkadiene copolymer, so that the rubber auxiliary is more uniformly dispersed in a formula system and participates in a cross-linking reaction during vulcanization, and meanwhile, the low Mooney trans-1, 4-alkadiene copolymer is added into the pre-dispersed rubber auxiliary master batch, so that the low Mooney trans-1, 4-alkadiene copolymer is added into the pre-dispersed rubber auxiliary master batch. Due to the introduction of the 1, 4-diene copolymer, the use of non-reactive plasticizer environment-friendly aromatic hydrocarbon oil can be reduced under a formula system, and the performance of the prepared vulcanized rubber is obviously better. Vulcanized rubber prepared from the pre-dispersed rubber auxiliary master batch is relatively low in rolling resistance and compression heat generation and relatively excellent in wear resistance.

Description

technical field [0001] The invention relates to the technical field of rubber synthesis and application, in particular to a pre-dispersed rubber auxiliary master batch, a preparation method and application thereof. Background technique [0002] Traditional rubber additives (such as accelerators, sulfur, zinc oxide, etc.) are all powdered, and there are many shortcomings in providing special physical properties for rubber products. First, dust is generated during use, which not only leads to inaccurate measurement, but also It affects the occupational health of operators; second, the dispersion effect of powdered rubber additives in the rubber matrix is ​​relatively poor, and the physical and mechanical properties of rubber products cannot be well exerted. [0003] The pre-dispersed rubber additive masterbatch technology is to pre-prepare ordinary powdery rubber additives, carriers, modifiers and processing aids into granular rubber additives, which can well solve the problem...

Claims

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Application Information

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IPC IPC(8): C08L9/00C08K5/47C08K3/22C08K3/06C08K5/43C08J3/22C08L7/00
CPCC08J3/226C08L7/00C08J2409/00C08J2307/00C08K5/47C08K3/22C08K3/06C08K5/43C08L9/00
Inventor 王浩葛怀涛任学斌栾波
Owner SHANDONG HUAJU POLYMER MATERIALS CO LTD
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