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Preparation method of high-reinforcement nanometer CaCO3 for silicone sealant

A silicone sealant and reinforcement technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for material and surface science, can solve the problem of the appearance of silicone sealant products is not bright, the effect of broken and depolymerization is not good, Problems such as poor appearance performance, to achieve the effect of good appearance, good reinforcement, and high reinforcement

Inactive Publication Date: 2013-02-06
SHANXI XINTAI HENGXIN NANO MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the 40-60nm nano-calcium carbonate is applied to the silicone sealant, the silicone sealant can have good reinforcement and tensile properties, but also due to the small particle size of the 40-60nm nano-calcium carbonate, the secondary particles The agglomeration is serious, the effect of crushing and depolymerization is not good, and it is easy to make the appearance of silicone sealant products not bright, or even have fine particles, and the appearance performance is poor; and 80-120nm nano-calcium carbonate is used in silicone sealants. , silicone sealant has good dispersion and processing performance, so it has good appearance performance, the surface of silicone sealant is relatively bright, but its performance is poor in terms of reinforcement and stretchability

Method used

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  • Preparation method of high-reinforcement nanometer CaCO3 for silicone sealant
  • Preparation method of high-reinforcement nanometer CaCO3 for silicone sealant
  • Preparation method of high-reinforcement nanometer CaCO3 for silicone sealant

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Embodiment 1

[0033] A special high-strength nano-CaCO for silicone sealant 3 A preparation method comprising the steps of:

[0034] (1) Take CaCO 3 Natural limestone with a content greater than 98% is washed and calcined at 1000°C to generate CaO, and then digested in hot water at 60°C to generate Ca(OH) 2 Digestive fluid, the Ca(OH) 2 The digestive juice is sieved and purified, separated and removed to prepare Ca(OH) with a concentration of 10%. 2 suspension;

[0035] (2) The Ca(OH) obtained in step (1) 2 The suspension is placed in the carbonization reactor, and at the same time, the calcined flue gas that has been dedusted and purified in step (1) is passed into the carbonization reaction, and the CO in the calcined flue gas 2 The concentration of the gas is 30%, and the carbonization temperature is controlled at 22°C. When the carbonization reaches pH=7, CaCO is added to the carbonization solution to account for the carbonization reaction. 3 1.5% dispersant by weight, after stirr...

Embodiment 2

[0038] A special high-strength nano-CaCO for silicone sealant 3 A preparation method comprising the steps of:

[0039] (1) Take CaCO 3 Natural limestone with a content greater than 98% is washed and calcined at 1050°C to generate CaO, and then digested in hot water at 80°C to generate Ca(OH) 2 Digestive fluid, the Ca(OH) 2 The digestive juice is sieved and purified, separated and removed to prepare Ca(OH) with a concentration of 6%. 2 suspension;

[0040] (2) The Ca(OH) obtained in step (1) 2 The suspension is placed in the carbonization reactor, and at the same time, the calcined flue gas that has been dedusted and purified in step (1) is passed into the carbonization reaction, and the CO in the calcined flue gas 2 The concentration of the gas is 35%, and the carbonization temperature is controlled at 20°C. When the carbonization reaches pH=7, add CaCO to the carbonization solution to account for the carbonization reaction. 3 1.0% dispersant by weight, after stirring fo...

Embodiment 3

[0043] A special high-strength nano-CaCO for silicone sealant 3 A preparation method comprising the steps of:

[0044] (1) Take CaCO 3 Natural limestone with a content greater than 98% is washed and calcined at 950°C to generate CaO, and then digested in hot water at 50°C to generate Ca(OH) 2 Digestive fluid, the Ca(OH) 2 The digestive juice is sieved and purified, separated and removed to prepare Ca(OH) with a concentration of 8%. 2 suspension;

[0045] (2) The Ca(OH) obtained in step (1) 2 The suspension is placed in the carbonization reactor, and at the same time, the calcined flue gas that has been dedusted and purified in step (1) is passed into the carbonization reaction, and the CO in the calcined flue gas 2 The concentration of the gas is 35%, and the carbonization temperature is controlled at 17°C. When the carbonization reaches pH=7, add CaCO to the carbonization solution to account for the carbonization reaction. 3 0.5% dispersant by weight, after stirring for...

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Abstract

The invention discloses a preparation method of high-reinforcement nanometer CaCO3 for a silicone sealant, which is used for solving the problem that the silicone sealant cannot have the advantages of high reinforcement and excellent appearance simultaneously by taking the existing nanometer CaCO3 as a raw material. The preparation method comprises the steps of carrying out calcination and digestion on natural limestone, which is taken as a raw material, to generate Ca(OH)2 suspension liquid, carrying out carbonization on the Ca(OH)2 suspension liquid, adding a dispersant in carbonized liquid when the pH value of the suspension liquid is equal to 7 via the carbonization, adding a modifier into the carbonized liquid after the temperature of the liquid rises, then keeping the liquid at the temperature for 2 hours, and finally carrying out filter pressing, drying and crush depolymerization on the liquid to obtain the high-reinforcement nanometer CaCO3. The prepared high-reinforcement nanometer CaCO3 is small in particle size, narrow in size distribution, good in reinforcement, high in purity and excellent in appearance; and the reinforcement of the nanometer CaCO3 is outstanding and can be up to 1.40Mpa-1.55Mpa in general.

Description

technical field [0001] The invention relates to a special high-reinforcement nano-CaCO for adhesive 3 The preparation method, especially relates to a kind of special high reinforcing glue nano CaCO for silicone sealant used in construction 3 method of preparation. Background technique [0002] Adhesives are widely used in construction, sealing and structural bonding in construction engineering. With the rapid development of the construction industry, the amount of glue used in construction in my country has increased rapidly, accounting for more than 30% of the total amount of synthetic adhesives. Silicone glue sealants are currently the main structural bonding and sealing materials for glass curtain walls. There are mainly Both acidic and neutral. Acidic silicone sealant has excellent adhesion to glass, but it is not suitable for concrete, stone and metal joints. With the deepening of people's understanding, its application range is limited. At present, neutral sealants ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C09J183/04C09J11/04B82Y30/00
Inventor 吕国章杨芮平董金锋
Owner SHANXI XINTAI HENGXIN NANO MATERIALS TECH CO LTD
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