Preparation method of wet process mixed natural rubber material

A natural rubber, wet mixing technology, applied in the direction of rolling resistance optimization, road transportation emission reduction, etc., can solve the problems of poor processing performance, insufficient dispersion, production environment pollution, etc., to achieve low rolling resistance, processing Simple process and the effect of reducing environmental pollution

Active Publication Date: 2011-08-17
ZHUZHOU ANBAOLINFENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silica has strong water absorption. When the amount of silica increases, more water and strong interaction between silica make it difficult to disperse in rubber. Although silane coupling agent is added It is beneficial to the dispersion of silica, but the dispersion is still not uniform enough, and it also leads to poor processing performance of the rubber compound
In addition, due to the small proportion of white carbon black, it flies around during the feeding and mixing process, causing serious pollution to the production environment

Method used

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  • Preparation method of wet process mixed natural rubber material
  • Preparation method of wet process mixed natural rubber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Concentrated natural rubber latex by centrifugal

[0035] A. Preparation of slurry

[0036] 1. Take 120 grams of precipitated white carbon black, dissolve it in 280 grams of deionized water, and soak for 3 hours;

[0037] 2. Add 4.8 grams of silane coupling agent γ-aminotriethoxysilane and 0.6 grams of surfactant sodium dodecylbenzenesulfonate, stir and mix evenly to make white carbon black slurry;

[0038] B. Grinding

[0039] The above-mentioned silica slurry was added to a high-shear disperser and ground for 20 minutes to prepare a silica dispersion with a sedimentation capacity of 60 mg / h.

[0040] C. Preparation of latex mixture

[0041] 1. Take 334 grams of centrifugally concentrated natural rubber latex with dry rubber content of 60%;

[0042] 2. Add the prepared silica water dispersion into 334 grams of latex, stir at room temperature for 30 minutes, and mix to make a latex mixture;

[0043] D. Flocculation, gel washing and dehydration

[0044] 1) Add 7 gr...

Embodiment 2

[0049] Field natural rubber latex

[0050] A. Preparation of slurry

[0051] 1. Take 120 grams of precipitated white carbon black, dissolve it in 280 grams of deionized water, and soak for 3 hours;

[0052] 2. Add 3.6 grams of silane coupling agent γ-aminotriethoxysilane and 1.4 grams of surfactant sodium dodecylbenzenesulfonate, stir and mix to make white carbon black slurry;

[0053] B. Grinding

[0054] The above-mentioned white carbon black slurry was added to a high-shear disperser and ground for 20 minutes to make a water dispersion of white carbon black with a sedimentation capacity of 50 mg / h;

[0055] C. Preparation of latex mixture

[0056] 1. Take 666.66 grams of field natural latex with a dry rubber content of 30%;

[0057] 2. Add the prepared white carbon black aqueous dispersion into 666.66 grams of natural rubber latex, stir at room temperature for 30 minutes and evenly mix to form a latex mixture;

[0058] D. Flocculation, gel washing and dehydration

[0...

Embodiment 3

[0064] Concentrated natural rubber latex by centrifugal

[0065] A. Preparation of slurry

[0066] 1. Take 80 grams of precipitated white carbon black, dissolve it in 320 grams of deionized water, and soak for 5 hours;

[0067] 2. Add 6.4 grams of silane coupling agent γ-aminotriethoxysilane and 0.8 grams of surfactant sodium dodecylbenzenesulfonate, stir and mix to make a white carbon black slurry;

[0068] B. Grinding

[0069] The above-mentioned white carbon black slurry was added to a high-shear disperser and ground for 20 minutes to make a water dispersion of white carbon black with a sedimentation capacity of 50 mg / h;

[0070] C. Preparation of latex mixture

[0071] 1. Take 334 grams of field natural rubber latex with dry rubber content of 60%;

[0072] 2. Add the prepared silica water dispersion into 334 g of natural rubber latex, stir at room temperature for 30 minutes and evenly mix to form a latex mixture.

[0073] D. Flocculation, gel washing and dehydration

...

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Abstract

The invention relates to a preparation method of a wet process mixed natural rubber material. The method comprises the following steps of: preparing slurry and soaking 15-40 percent of dry white carbon black in 60-85 percent of deionized water; adding a coupling agent and a surfactant, uniformly mixing, grinding, preparing latex mixed liquor, extracting natural latex and adding white carbon black water dispersoid into the latex; stirring and mixing to obtain a latex mixed liquor, flocculating and adding acetic acid into the mixed liquor; performing rubber washing and dehydration by using a rubber washing machine and feeding to a rubber pelletizer for pelletizing; and feeding rubber particles into a box drying cabinet for drying. The preparation method has the advantages of simple machining process, small equipment investment, realization of various ideal performances with the most ordinary white carbon black, low dust pollution in the entire production process and energy saving. A tire manufactured with the method has small rolling resistance, low heat generation, high tensile strength, high tearing strength and high rubber material ageing resistance. Mixing of the white carbon black is performed in a liquid phase, so that the dispersivity and uniformity are enhanced.

Description

technical field [0001] The invention relates to a preparation method of natural rubber material, in particular to a preparation method of using white carbon black or inorganic filler to wet-mix natural rubber. Background technique [0002] Natural rubber is widely used in rubber industry and tire industry because of its excellent physical and mechanical properties and elasticity. The traditional rubber preparation method for tires and other rubber products is to add various performance compounding agents, process compounding agents and a large amount of reinforcing agent to the rubber compound in the form of dry mixing after natural rubber is masticated. Commonly used reinforcing agents are mostly various carbon black and a small amount of inorganic materials. The addition of carbon black improves the physical properties and wear resistance of the tire, but it also increases the rolling resistance and heat generation of the rubber compound. This not only increases the fuel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K9/06C08K9/04C08K3/36C08C1/16
CPCY02T10/86
Inventor 麦千里彭魁胡颂平赵萍
Owner ZHUZHOU ANBAOLINFENG NEW MATERIALS
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