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Method for preparing nano calcium carbonate for high-temperature resistant polymers

A high-temperature-resistant polymer and nano-calcium carbonate technology, which is applied in the treatment of dyed organic silicon compounds, dyed low-molecular organic compounds, and fibrous fillers, can solve the problem of poor heat resistance and does not involve heat-resistant nano-carbonic acid modifiers. Problems such as the influence of calcium application material properties, to achieve the effect of improving product uniformity, facilitating continuous production operation, and high whiteness

Inactive Publication Date: 2011-02-09
山东海泽纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with metal materials, one of the outstanding disadvantages of polymers is that they are poor in heat resistance. For this reason, many polymers with better heat resistance have been gradually developed and used in high-end applications such as automobiles, electronics, and aerospace. The field has been widely used
Existing reports have not yet involved the heat resistance of modifiers and their effects on the performance of nano-calcium carbonate application materials

Method used

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  • Method for preparing nano calcium carbonate for high-temperature resistant polymers
  • Method for preparing nano calcium carbonate for high-temperature resistant polymers

Examples

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Embodiment 1

[0018] After the limestone is cleaned, it is calcined at 1000°C, and it is digested with water at 80°C to obtain a Ca(OH)2 slurry, which is transferred to a membrane dispersion carbonization reactor, and 0.5% (relative to Ca(OH)2) of sucrose is added. Feed 30% (v) of CO2 at 17 ° C for carbonization, when the pH drops to 6.8, continue to ventilate for 10 minutes to obtain 8% nanometer CaCO3 protoplasm. Heat the raw slurry, raise the temperature to 80° C. and stir for 5 minutes, add 1.5% (relative to CaCO3) stearic acid, and stir for 1 hour. Weigh 2% (relative to calcium carbonate) of a titanate modifier containing a benzene ring, add a small amount of water, emulsify at room temperature for 15 minutes, heat to 80°C, add stearic acid modified calcium carbonate slurry In the material, continue stirring for 3 hours, place overnight, dry and pulverize after filtering, and make the product of the present invention.

Embodiment 2

[0020] After the limestone is cleaned, it is calcined at 1000°C, and it is digested with water at 80°C to obtain a Ca(OH)2 slurry, which is transferred to a membrane dispersion carbonization reactor, and 0.5% (relative to Ca(OH)2) of sucrose is added. Feed 30% (v) of CO2 at 17 ° C for carbonization, when the pH drops to 6.8, continue to ventilate for 10 minutes to obtain 8% nanometer CaCO3 protoplasm. Heat the raw slurry, raise the temperature to 80° C. and stir for 5 minutes, add 1.5% (relative to CaCO3) stearic acid, and stir for 1 hour. Weigh 3% (relative to calcium carbonate) of a titanate modifier containing a benzene ring, add a small amount of water, emulsify at room temperature for 15 minutes, heat to 80°C, add stearic acid modified calcium carbonate slurry In the material, continue stirring for 3 hours, place overnight, dry and pulverize after filtering, and make the product of the present invention.

Embodiment 3

[0022] After the limestone is cleaned, it is calcined at 1000°C, and it is digested with water at 80°C to obtain a Ca(OH)2 slurry, which is transferred to a membrane dispersion carbonization reactor, and 0.5% (relative to Ca(OH)2) of sucrose is added. Feed 30% (v) of CO2 at 17 ° C for carbonization, when the pH drops to 6.8, continue to ventilate for 10 minutes to obtain 8% nanometer CaCO3 protoplasm. Heat the original slurry, raise the temperature to 80°C for emulsification for 5 minutes, add 1.5% (relative to CaCO3) stearic acid, emulsify for 1 hour, filter and then dry and pulverize. Add water to the pulverized sample to form an 8% slurry, heat to 80°C, emulsify for 5 minutes, weigh 2% (relative to calcium carbonate) of a titanate modifier containing a benzene ring, add a small amount of water, Emulsify at normal temperature for 15 minutes and heat to 80°C, add to stearic acid-modified calcium carbonate slurry, continue to emulsify for 3 hours, leave overnight, filter, dry ...

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Abstract

The invention discloses a method for preparing nano calcium carbonate for high-temperature resistant polymers, which comprises the following steps of: purifying, slaking and ageing a limestone calcined product, then adding a crystal nucleus control agent into the generated calcium hydroxide slurry and carbon dioxide mixed gas, carbonizing the mixture to synthesize nano calcium carbonate slurry, heating the nano calcium carbonate slurry, adding a certain amount of fatty acid (salt) modifier into the slurry to perform surface activation treatment, and adding a certain amount of outer heat-resistant modifier emulsion with high heat-resistant group into the slurry to perform heat-resistant wrapping treatment on the surface of the calcium carbonate. The method is reasonable and reliable, is favorable for continuous production operation, and can improve the uniformity of the product and reduce the cost; and the product has the characteristics of high whiteness and low viscosity, and is suitable for polymers of plastic, rubber, adhesive and the like in the fields of automobiles, electronics, spaceflight and the like.

Description

technical field [0001] The invention relates to a preparation method of nano calcium carbonate, in particular to a preparation method of nano calcium carbonate used for high temperature resistant polymers. Background technique [0002] Nano calcium carbonate (NPCC) prepared by precipitation method has a wide range of applications in plastics, rubber, adhesives, coatings, papermaking, biological materials and other fields. According to the forecast of the international organization ROSKILL, the world PCC (precipitated calcium carbonate) market in 2012 The consumption will reach 16 million tons. In the application field of nano-calcium carbonate, most products belong to the category of polymers, such as plastics, rubber, adhesives, coatings, etc., and occupy an important market share. Taking plastics as an example, the market usage of PCC in plastics will reach 3.5 million tons. Compared with metal materials, polymer materials are widely used in many fields due to their adva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/08C08L23/06C08L83/04C09C1/02C08K3/26C08K9/10C08K9/04C09C3/12C08L63/00
Inventor 王卓李明英杜立波肖建平李常林郭安慧陈祥芝朱孝川
Owner 山东海泽纳米材料有限公司
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