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Preparation method of high-end nanometer calcium carbonate for butyl rubber products

A nano-calcium carbonate, butyl rubber technology, applied in the direction of calcium carbonate/strontium/barium, nanotechnology, chemical instruments and methods, etc. The particles are finer and more uniform, the uniformity is guaranteed, and the effect of low pH value

Active Publication Date: 2019-05-28
卢氏国嵩莱纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to technical and equipment reasons, domestic calcium carbonate enterprises are still unable to effectively synthesize nano-calcium carbonate with a primary particle size of less than 20nm in industry and solve the problem of agglomeration / dispersion of the ultrafine powder, so that they promote COSCO to downstream rubber customers. It cannot meet the technical requirements of its existing formulations, so most rubber companies use heavy calcium and ordinary activated calcium carbonate as filling materials

Method used

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  • Preparation method of high-end nanometer calcium carbonate for butyl rubber products
  • Preparation method of high-end nanometer calcium carbonate for butyl rubber products
  • Preparation method of high-end nanometer calcium carbonate for butyl rubber products

Examples

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Effect test

Embodiment 1

[0053] A kind of preparation method of high-end nanometer calcium carbonate for butyl rubber product, comprises the following steps,

[0054] Step 1. Mix quicklime with an activity of 410ml and a whiteness of 95.0 with digested water at a temperature of 75°C in a mass ratio of 1:7, and then carry out a digestion reaction to obtain a coarse slurry of calcium hydroxide and lime activity. The purity and reactivity of calcium hydroxide are guaranteed due to the use of ultra-high activity lime for digestion. According to the thermodynamics and kinetics of the digestion reaction, reasonable water temperature and reasonable gray water are used. The reaction ratio ensures the thoroughness of the digestion reaction;

[0055] Step 2: Pass the coarse calcium hydroxide slurry through 300-mesh and 400-mesh vibrating screens to remove impurities, and then pass through five-stage suspension separators connected in series to obtain fine calcium hydroxide pulp. The sieve is used for sieving a...

Embodiment 2

[0067] A kind of preparation method of high-end nanometer calcium carbonate for butyl rubber product, comprises the following steps,

[0068] Step 1. Mix quicklime with an activity of 405ml and a whiteness of 95.5 with digested water at a temperature of 75°C in a mass ratio of 1:8, and then carry out a digestion reaction to obtain a coarse slurry of calcium hydroxide and lime activity. The purity and reactivity of calcium hydroxide are guaranteed due to the use of ultra-high activity lime for digestion. According to the thermodynamics and kinetics of the digestion reaction, reasonable water temperature and reasonable gray water are used. The reaction ratio ensures the thoroughness of the digestion reaction;

[0069] Step 2: Pass the coarse calcium hydroxide slurry through 300-mesh and 400-mesh vibrating screens to remove impurities, and then pass through five-stage suspension separators connected in series to obtain fine calcium hydroxide pulp. The sieve is used for sieving a...

Embodiment 3

[0081] A kind of preparation method of high-end nanometer calcium carbonate for butyl rubber product, comprises the following steps,

[0082] Step 1. Mix quicklime with an activity of 400ml and a whiteness of 94.5 with digested water at a temperature of 73°C in a ratio of 1:9 by mass, and then carry out a digestion reaction to obtain a coarse slurry of calcium hydroxide and lime activity. The purity and reactivity of calcium hydroxide are guaranteed due to the use of ultra-high activity lime for digestion. According to the thermodynamics and kinetics of the digestion reaction, reasonable water temperature and reasonable gray water are used. The reaction ratio ensures the thoroughness of the digestion reaction;

[0083] Step 2. Pass the coarse calcium hydroxide slurry through 300-mesh and 400-mesh vibrating screens to remove impurities, and then pass through five-stage suspension separators connected in series to obtain fine calcium hydroxide slurry. Due to the adoption of two ...

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Abstract

The invention discloses a preparation method of high-end nanometer calcium carbonate for butyl rubber products. CaO and water take nitration reaction; generated Ca(OH)2 emulsion is subjected to impurity removal, aging and grinding; after crystal form control agents are added, carbonization synthesis reaction is performed with washed CO2-containign kiln gas; after the reaction is completed, CaCO3 cooked pulp is obtained; modifying agents are added into the cooked pulp; next, performing grinding; then, performing press filtering dewatering and drying; next, coupling agents are added for crushingand grading; high-end nanometer calcium carbonate for a butyl rubber product is obtained. The prepared nanometer calcium carbonate has good dispersion performance and great specific surface area, isused in the butyl rubber products, realizes the functional nanometer calcium carbonate meeting the three factors of reinforcing performance, matching performance and processing performance, belongs toa product of synthesis calcium carbonate with the finest primary particle diameter (15 to 20nm) in the existing market, can replace the semi-reinforcing agents and can partially replace reinforcing agents.

Description

technical field [0001] The invention relates to the technical field of preparation of nano-calcium carbonate, in particular to a preparation method of high-end nano-calcium carbonate for butyl rubber products. Background technique [0002] In recent years, with the rapid development of my country's automobile industry and the sharp increase in the use of tires, the production of waste tires is also increasing at a double-digit rate every year. The existence of a large number of waste tires endangers public health and safety, and is called "black pollution". Therefore, butyl tires are an international trend. Butyl inner tubes have good air tightness, high strength, heat resistance, aging resistance, long service life and high safety performance, and have become people's first choice. The formula of butyl rubber inner tube includes several parts: skeleton material, filler, vulcanization system, processing aid, anti-aging agent and so on. Skeleton materials mainly include but...

Claims

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Application Information

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IPC IPC(8): C08K9/06C08K9/04C08K9/02C08K3/26C08L23/22C09C1/02C09C3/06C09C3/12C09C3/08C01F11/18B82Y40/00
Inventor 杜年军孙勇峰
Owner 卢氏国嵩莱纳米科技有限公司
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