Fire-proof paint modifier of tunnel based on polymer/clay intercalation modifying technology and production thereof

A fire-resistant coating and polymer technology, applied in the direction of coating, can solve the problems of coating moisture, coating peeling, coating surface corrosion, etc., and achieve the effect of improving barrier property, water resistance and good barrier performance.

Inactive Publication Date: 2005-12-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are the following problems in tunnel fireproof coatings: (1) low bond strength
When the vehicle passes through the tunnel, it will generate strong wind and vibration, sometimes causing the coating to fall off; (2) Poor water resistance
The components of tunnel fireproof coatings contain more light porous inorganic mineral materials, and the main binder is inorganic silicate, which is very easy to absorb water and make the coating damp; (3) The surface of the coating is easily corroded by the acid exhaust gas emitted by automobiles

Method used

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  • Fire-proof paint modifier of tunnel based on polymer/clay intercalation modifying technology and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of modified clay:

[0031] 1) Add 1Kg of montmorillonite and 50Kg of deionized water to the reactor in order, and stir at high speed for 5min;

[0032] 2) After raising the reaction kettle to 50°C, add 0.5Kg of organic intercalant cetyltrimethylammonium bromide and stir vigorously for 15 minutes, then stir at low speed for 4 hours, and cool to discharge;

[0033]3) Centrifugally separate the product and wash it repeatedly with ethanol-deionized water with a molar ratio of 1:1 until the centrifugal mother liquor does not appear to precipitate with a 0.1 mol / L silver nitrate solution;

[0034] 4) The cleaned product is vacuum dried at 90°C for 24 hours, and the product obtained is modified clay, which is packaged for later use.

[0035] Preparation of polymer / clay intercalation modification modifier (designed with the total raw materials as 50Kg):

[0036] 1) Take 1.5Kg of modified clay prepared by the above method and grind it in a ball mill tank for 3 hours, sta...

Embodiment 2～5

[0045] Change the dosage of the modified clay and amino resin solution in the formula, the dosage of the additive remains unchanged, and apply the modifier to the surface of the tunnel fireproof coating. The results are shown in Table 1.

[0046] Example

Embodiment 6

[0048] Preparation of modified clay:

[0049] 1) Add 3Kg of vermiculite and 150Kg of deionized water to the reactor in order, and stir at high speed for 5min;

[0050] 2) After raising the reaction kettle to 60°C, add 1.5Kg of organic intercalant octadecyltrimethylammonium chloride and stir vigorously for 15 minutes, then stir at low speed for 5 hours, and cool and discharge;

[0051] 3) Centrifugally separate the product and wash it repeatedly with ethanol-deionized water with a molar ratio of 1:1 until the centrifugal mother liquor does not appear to precipitate with a 0.1 mol / L silver nitrate solution;

[0052] 4) Dry the cleaned product under vacuum at 90°C for 24 hours. The resulting product is modified clay, ready for bottled.

[0053] Preparation of polymer / clay surface modifier:

[0054] 1) Take 2Kg of the modified clay prepared by the above method and grind it in a ball mill tank for 3 hours, static precipitation, drying, grinding, and sieving;

[0055] 2) Add 2Kg of modi...

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Abstract

A fire-proof paint modifier of tunnel based on polymer/clay inserting layer modification technology and its production are disclosed. The modifier consists of polymer, modified clay and additive, polymer is bromo-bisphenol A epoxy resin or amino resin solution, modified clay is insert modified roseite, concavo-convex rod clay or montmorillonite, and additive is expendable graphitic, magnesium hydroxide, aluminum hydrate and nanometer TiO2. The process is carried out by destroying clay structure, stripping it into basic unit, dispersing in polymer matrix, and obtaining modifier. Its advantages include better hydrophobicity and thermal stability, higher strength and toughness, to prevent smoke from eroding and improve corrosion and water resistances.

Description

Technical field [0001] The invention relates to a functional modifier suitable for tunnel fireproof coatings, in particular to a nano-scale composite modifier of polymer / clay prepared by intercalation modification technology. Background technique [0002] As the tunnel environment is relatively closed, once a fire occurs, it is difficult to evacuate people, and it is easy to cause serious casualties. Therefore, it is very important to strengthen the tunnel's fire protection. The tunnel masonry is composed of reinforced concrete and other materials that are not resistant to high temperatures. Studies have shown that the surface of the concrete structure will burst at high temperatures after being heated. Moreover, the higher the moisture content of concrete (including physically bound water and molecular bound water), the greater the possibility of bursting. When the mass moisture content of unprotected concrete exceeds 3%, it will be exposed to high temperature within 5-30 minute...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12
Inventor 戴李宗张卓庄勋港雷光财黄晓平许一婷
Owner XIAMEN UNIV
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