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Rubber anti-recovery agent and preparation thereof

An anti-vulcanization reversion agent and rubber technology, which is applied in the field of material engineering, can solve the problems of decreased flexibility and mechanical strength, and achieve the effects of improved processing performance, lower internal temperature, and low compression heat generation

Active Publication Date: 2009-07-15
JIANGSU KAOU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with vulcanizates with more disulfide crosslinks and monosulfide crosslinks, compared with vulcanizates with more polysulfide crosslinks, the flexibility and mechanical strength properties are reduced, and these properties are extremely important under dynamic conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare 500kg of rubber anti-reversion agent, wherein the content of zinc stearate is 50%, the content of zinc benzoate is 28%, and the content of ethyl branched 6-zinc carbonate is 22%.

[0032] Feeding amount:

[0033] Stearic acid 500kg×50%×0.87=217.5kg,

[0034] ZnO(I) 500kg×50%×0.13=32.5kg;

[0035] Benzoic acid 500kg×28%×0.65=91kg,

[0036] ZnO(II) 500kg×28%×0.35=49kg;

[0037] 6 carbonic acid 500kg * 22% * 0.78=85.8kg of ethyl branched chain,

[0038] ZnO(III) 500kg×22%×0.22=24.2kg;

[0039] The total amount of ZnO is 32.5kg+49kg+24.2kg=105.7kg.

[0040]First add 217.5kg of stearic acid into the reaction kettle, heat and stir until melting, continue heating to 90°C, then add 91kg of phenylformic acid and 85.8kg of 6-carbonic acid with ethyl branched chain into the reaction kettle, and continue to heat up to 100°C ℃, and heated and stirred until mixed evenly, 105.7kg of ZnO was added into the reactor in 3 batches, and stirred and reacted for 1 hour at 100℃, ...

Embodiment 2

[0042] Prepare 500kg of rubber anti-reversion agent, wherein the content of zinc stearate is 50%, the content of zinc benzoate is 26%, and the content of ethyl branched 6-zinc carbonate is 24%.

[0043] Feeding amount:

[0044] Stearic acid 500kg×50%×0.87=217.5kg,

[0045] ZnO(I) 500kg×50%×0.13=32.5kg;

[0046] Benzoic acid 500kg×26%×0.65=84.5kg,

[0047] ZnO(II) 500kg×26%×0.35=45.5kg;

[0048] 6 carbonic acid 500kg * 24% * 0.78=93.6kg of ethyl branched chain,

[0049] ZnO(III) 500kg×24%×0.22=26.4kg;

[0050] The total amount of ZnO is 32.5kg+45.5kg+26.4kg=104.4kg.

[0051] Add 217.5kg of stearic acid into the reaction kettle, heat and stir until melting, continue heating to 95°C, then add 84.5kg of phenylformic acid and 93.6kg of 6 carbonic acid with ethyl branched chain into the reaction kettle, continue Raise the temperature to 105°C, heat and stir until evenly mixed, add 104.4kg ZnO into the reaction kettle in 4 batches, stir and react at 110°C for 1.2 hours, take a ...

Embodiment 3

[0053] Taking the rubber anti-reversion agent prepared in Example 1 as detection object, carry out the anti-reversion property and other physical property tests of the product of the present invention, and the performance and blank of citraconimide anti-reversion agent (PK900) Contrast test for comparison:

[0054] 1. Test formula

[0055] Table 1 Test formula content *

[0056] Recipe Number 1-1 2-2 3-3 Natural rubber 100 100 100

Zinc oxide 4 4 ​​5

Stearic acid 2 2 2

Antiaging agent 4.5 4.5 4.5

Processing aids 1 1 1

Carbon black 53 53 53

Softener 7 7 7

Vulcanizing agent 3 3 3

The present invention 1.0

PK900 1.0

blank Total 175.7 175.7 175.7

[0057] Note: * Data unit is part

[0058] 2. Raw materials

[0059] The raw materials in Table 1 are commonly used raw materials in the tire industry.

[0060] ①Natural rubber imported from Malaysia;

[0061] ② Stearic acid (1801) imported from Indonesia;

[0062] ③ Zi...

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PUM

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Abstract

The invention discloses a rubber anti-sulfuration recovery agent, which comprises the following components according to the percentage by weight: 50-55% of zinc fatty acid, 23-28% of aromatic acid zinc, 17-22% of poly zinc carbonate with branched chains. The invention also discloses a preparation method for poly zinc carbonate. The invention discloses a preparation method for the rubber anti-sulfuration recovery agent. The rubber anti-sulfuration recovery agent not only has anti-sulfuration recovery function on vulcanized rubber, but also can reduce the Mooney viscosity of gross rubber, improves the sizing processing performance and can reduce dynamic heat build-up of tread rubber of tyre. The preparation method of the rubber anti-sulfuration recovery agent is different from other simple mixed methods adopted for preparing general multicomponent mixtures. The rubber anti-sulfuration recovery agent is prepared by using the method that organic acid and zinc oxide directly reacts; and the reaction process has no pollution.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and in particular relates to a rubber anti-reversion agent and a preparation method thereof. Background technique [0002] Vulcanization reversion refers to the phenomenon that the thermal degradation of the vulcanized cross-linking bonds leads to the decrease of the physical properties of the vulcanized rubber and the deterioration of the service performance. When the natural rubber is vulcanized by the traditional vulcanization system, the amount of sulfur is large and the amount of accelerator is small. More than 70% of the vulcanized rubber forms a polysulfide cross-linking bond structure, which has the advantage of high mechanical strength. However, the thermal stability of polysulfide crosslinks is poor. During the vulcanization process, as the heating time increases, the initially formed polysulfide crosslinks will be partially broken, resulting in a decrease in the number of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/098C08K5/04C08L21/00B29B9/10
Inventor 叶剑雄傅秋明周建强
Owner JIANGSU KAOU CHEM
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