Nano calcium carbonate and styrene-butadiene rubber composition and preparation method thereof

A technology of nano-calcium carbonate and styrene-butadiene rubber, which is applied in the field of preparation of nano-calcium carbonate and styrene-butadiene rubber blend compositions, can solve the problems of single-particle dispersion of calcium carbonate particles, limitation of calcium carbonate particle isolation, and influence on the composition Problems such as application function, to achieve good dispersion stability, improve functional enhancement, reduce energy consumption and dust pollution

Active Publication Date: 2011-04-20
建德华明科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent document CN 1174210A adopts the method of step-by-step coagulation and co-precipitation to prepare superfine calcium carbonate-filled powder rubber, and the process operation of this method is cumbersome
[0007] Chinese patent document application number 02152078.X discloses a method for preparing superfine calcium carbonate-filled powder rubber by coagulation and co-precipitation, which adopts a one-step coagulation and co-precipitation process, which overcomes the defects of step-by-step operation and further simplifies the process , but with ultra-fine calcium carbonate dry powder as raw material, it is necessary to prepare ultra-fine calcium carbonate dry powder into a stable suspension through high-energy shear dispersion. This process is time-consuming and energy-consuming. Hard agglomeration is also difficult to disaggregate, and the complete single particle dispersion of calcium carbonate particles in the composition system cannot be realized. The isolation effect of calcium carbonate particles is limited, which also affects the application function of the composition
On the other hand, according to the method taught by ZL 02152078.X, a large amount of small molecular spacers are used to prevent the particles of the composition from sticking to each other during the preparation process. Product with uniform particle size distribution

Method used

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  • Nano calcium carbonate and styrene-butadiene rubber composition and preparation method thereof
  • Nano calcium carbonate and styrene-butadiene rubber composition and preparation method thereof
  • Nano calcium carbonate and styrene-butadiene rubber composition and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] 1) Surface treatment of nano calcium carbonate

[0037] Add 10g of sodium stearate to 150ml of water at a temperature of 80°C, stir until it is completely emulsified, then add 4.5g of OP-9 and 4.5g of styrenated phenol in sequence, keep warm and continue stirring for 30 minutes to obtain the modified lotion.

[0038] The temperature prepared by the carbonization method with a solid content of 15% (WT) is 2 kilograms of nano-calcium carbonate suspensions at 69°C and placed in a 5L jacketed reactor, the temperature is raised to 80°C, and the modifier prepared above is added The emulsion is kept at 80° C. and stirred for 1 hour to obtain a dispersed and stable nano-calcium carbonate suspension.

[0039] In the nano-calcium carbonate suspension, the average particle diameter of the nano-calcium carbonate is 50 nanometers.

[0040] 2) Blending and coagulation

[0041]The styrene-butadiene latex that 2.4 kilograms of solid content is 5% (Wt) is joined in the above-mentione...

Embodiment 2

[0043] 1) Surface treatment of nano calcium carbonate

[0044] Add 8.3g of sodium stearate to 150ml of water at a temperature of 90°C, stir until it is completely emulsified, then add 10g of TX-10 and 2.5g of 2,6-di-tert-butyl-p-cresol in turn, and continue to Stir for 30 minutes to obtain modifier emulsion.

[0045] The temperature prepared by the carbonization method with a solid content of 10% (wt) is 2 kilograms of nano-calcium carbonate suspensions at 46°C and placed in a 5L jacketed reactor, the temperature is controlled at 46°C, and the modifier emulsion prepared above is added , insulated and stirred for 3 hours to obtain a dispersed and stable nano-calcium carbonate suspension. In the nano-calcium carbonate suspension, the average particle diameter of the nano-calcium carbonate is 45 nanometers.

[0046] 2) Blending and coagulation

[0047] The styrene-butadiene latex that 0.4 kilogram of solids content is 10% (wt) is joined in the above-mentioned prepared nano-cal...

Embodiment 3

[0049] 1) Surface treatment of nano calcium carbonate

[0050] Add 3.4kg of sodium stearate to 150kg of water at a temperature of 85°C, stir until it is completely emulsified, then add 6.7kg of AEO1500 and 4.8kg of nickel dibutyldithiocarbamate in turn, keep warm and continue stirring for 30 minutes , to obtain modifier emulsion.

[0051] The temperature prepared by the carbonization method with a solid content of 6.5% (wt) is 2000 kilograms of 55 ℃ nano-calcium carbonate suspension placed in a 5m 3 A jacketed reactor was used to control the temperature to 90°C, and the modifier emulsion prepared above was added, and kept stirring for 1.5 hours to obtain a dispersed and stable nano-calcium carbonate suspension. In the nano-calcium carbonate suspension, the average particle diameter of the nano-calcium carbonate is 80 nanometers.

[0052] 2) Blending and coagulation

[0053] The styrene-butadiene latex that 300kg solid content is 10% (wt) joins in the above-mentioned prepare...

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Abstract

The invention discloses a nano calcium carbonate and styrene-butadiene rubber composition and a preparation method thereof. The weight of styrene-butadiene rubber is 20 to 40 percent of that of calcium carbonate. The product provided by the invention is the nano calcium carbonate and styrene-butadiene rubber composition with small particle sizes and uniformly distributed granularity; and the composition can remarkably improve the dispersibility of the nano calcium carbonate in the rubber, realize the nano-scale dispersion of the nano calcium carbonate in the rubber system, enhance the functional reinforcement function of the nano calcium carbonate, simultaneously further simplify a process flow, save the steps of drying, crushing and the like in a nano calcium carbonate powder preparation process, and avoid energy consumption and dust pollutions caused by the steps of drying, crushing and the like.

Description

technical field [0001] The invention relates to a nano calcium carbonate / rubber composite material and a preparation method thereof, in particular to a preparation method of a nano calcium carbonate and styrene-butadiene rubber blend composition. Background technique [0002] Filled powder rubber refers to a kind of powdered rubber mixed with carbon black, calcium carbonate and other fillers in rubber. It can be used as a masterbatch to blend with other rubber materials, or as a rubber material for the final rubber formula. It can be easily It can well solve the problems of rubber reinforcing filler loss, environmental pollution, etc., and can be used to replace traditional bulk rubber, using special equipment to process such as extrusion, injection, molding, or using existing rubber processing equipment to traditional The processing method is processed into vulcanized rubber products, which has significant effects such as energy saving and time saving, equipment investment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08J3/20C08K9/04C08K3/26
Inventor 陈雪梅屈国梁吴秋芳杨景辉陈刚马新胜
Owner 建德华明科技有限公司
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