Industrial lignin reinforcing rubber and preparation method of industrial lignin reinforcing rubber

A technology of industrial lignin and reinforced rubber, which is applied in the field of industrial lignin reinforced rubber and its preparation, can solve the problems of unreachable dispersion scale, poor dispersion stability, increased permanent deformation, etc., and achieve low cost and stable performance , The effect of improving physical and mechanical properties

Active Publication Date: 2012-10-10
广西合山林格高分子材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Therefore, using carbon black as a reinforcing agent for rubber, although compared with the traditional rubber mixing method in terms of technology and economy, has certain advantages, it also has the following disadvantages: (1) Since carbon black is a hydrophobic material , when preparing the carbon black dispersion, the shear force of the carbon black particles in the ball mill is much smaller than that of the mixing, so the carbon black in the raw rubber cannot reach the level that the traditional mixing method can achieve. Scattered scales lead to weakening of some properties of the rubber, such as a decrease in tear strength and an increase in permanent deformation
(2) The amount of carbon black added to the latex is also greatly limited, mainly because carbon black has a high density and hydrophobic properties, and the dispersion stability is poor, which cannot meet the expectations of rubber products. The purpose of adding most of the carbon black to raw rubber by emulsion co-precipitation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0049] Co-precipitation and blending of lignin and natural rubber latex for the production of tire tread rubber

[0050] Hydroxymethylated modified lignin is washed with water before drying, so that the soluble content of lignin is less than 5%, and the moisture content of lignin is 75%. Anti-aging agent is added, and lignin and anti-aging agent are beaten by stirring tank Finally, a lignin dispersion is made, and the solid content of the dispersion is about 25%; the lignin dispersion is added to commercial natural rubber latex with a solid content of about 60%. The weight ratio of lignin, anti-aging agent and natural rubber (both on an absolute dry basis) is 100:1.5:100. After stirring evenly, add an appropriate amount of dilute sulfuric acid to solidify the latex, briquetting, washing and drying to obtain co-precipitation of lignin and natural latex.

[0051] Performance test: The physical and mechanical performance test of rubber compound adopts the same compound system an...

specific Embodiment 2

[0061] Co-precipitation and blending of lignin and styrene-butadiene latex for the production of rubber conveyor belt surface rubber

[0062] The hydroxymethylated modified lignin is washed with water before drying, so that the soluble content of the lignin is less than 5%, and the moisture content of the lignin is 75%. Add the lignin to the stirring tank, start the stirring tank, and add in order Anti-aging agent, complexin, white mud, water, beating lignin, anti-aging agent, complexin, white mud, stirring for 2 to 4 hours to make a multi-component dispersion, the weight ratio of lignin and water is 25:75 , The weight ratio of white clay: complexin: lignin is 100:0.5:100; the multi-component dispersion is added to the styrene-butadiene latex with a solid content of about 23%. The weight ratio of lignin, white mud, chelatin, anti-aging agent, and styrene-butadiene rubber (both on an absolute dry basis) is 110:110:0.6:1.5:100. After stirring evenly, add an appropriate amount o...

specific Embodiment 3

[0072] Co-precipitation and blending of lignin and nitrile latex for the production of steel wire wound hose primer

[0073] Hydroxymethylated modified lignin is washed with water before drying, so that the soluble content of lignin is less than 5%, and the moisture content of lignin is 75%. Anti-aging agent is added, and lignin and anti-aging agent are beaten by stirring tank Finally, lignin dispersion is made, and the solid content of the dispersion is about 25%; DOP is added to nitrile latex with a solid content of about 25%, and the weight ratio of nitrile rubber and DOP is 100:10 (calculated on dry basis) and stir evenly to make a mixture of nitrile latex and DOP; add the lignin dispersion to the mixture of nitrile latex and DOP. The weight ratio of lignin, anti-aging agent, nitrile rubber and DOP (both on dry basis) is 200:1.5:100:10. After stirring evenly, add an appropriate amount of calcium chloride aqueous solution to solidify the latex, briquetting, washing, and dr...

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Abstract

The invention relates to industrial lignin reinforcing rubber and a preparation method of the industrial lignin reinforcing rubber. The industrial lignin reinforcing rubber is characterized in that 1, the industrial lignin reinforcing rubber comprises lignin dispersoid, rubber latex, a small number of plasticizers and operation oil or comprises multi-component lignin dispersoid, rubber latex, a small number of plasticizers and operation oil; 2, the lignin dispersoid is suspension of lignin in water, the weight part of the lignin is 5 to 30 percent, the multi-component lignin dispersoid is suspension of the lignin and inorganic fillers in water, and the weight proportion of the lignin to the water is (5-30):(95-70); and 3, in the lignin dispersoid and the multi-component lignin dispersoid, the lignin is hydroxymethylation modified dispersoid. The preparation method comprises the steps of 1. lignin preparation, 2, lignin dispersoid preparation, 3, rubber latex preparation, 4, cosedimentation and solidification and 5, industrial lignin reinforcing rubber obtaining. The industrial lignin reinforcing rubber and the preparation method have the advantages that the physical and mechanical properties of the rubber are not reduced, meanwhile, the drying processes in the lignin and rubber production process are combined, and the motive power consumption of rubber mixing is reduced.

Description

technical field [0001] The invention relates to an industrial lignin reinforced rubber and a preparation method thereof. The invention belongs to the technical field of chemical materials and their preparation. Background technique [0002] Traditionally, the production of rubber products requires the use of rubber internal mixers, open mills, continuous screw mixers and other equipment to combine raw rubber with reinforcing agents, fillers, vulcanization accelerators, antioxidants, operating oils, and functional aids. Mixing with additives, etc., to endow the rubber compound with specific technological properties and specific physical and chemical properties of the vulcanized rubber. This mixing method is also called dry mixing. This mixing process requires a lot of power. Reinforcing agent and operating oil are the most widely used additives in the rubber industry, and the power consumed by kneading reinforcing agent and operating oil accounts for more than 40% of the ru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08L9/08C08L9/04C08L9/10C08L23/22C08L11/02C08L97/00C08K3/34C08K3/26C08H7/00
Inventor 张仲伦
Owner 广西合山林格高分子材料科技有限公司
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