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

A technology of fire retardant coating and polymer, applied in the direction of fire retardant coating, coating, etc., can solve the problems of coating moisture, coating peeling, low bonding strength, etc., to achieve good barrier properties, improve barrier properties and water resistance.

Inactive Publication Date: 2007-06-27
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 into the reaction kettle in sequence, and stir at high speed for 5 minutes;

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

[0033]3) Centrifuge the product, and wash it repeatedly with ethanol-deionized water with a molar ratio of 1:1 until no precipitation occurs in the centrifuged mother liquor when tested with 0.1mol / L silver nitrate solution;

[0034] 4) Vacuum-dry the cleaned product at 90° C. for 24 hours, and the obtained product is modified clay, which is packed for later use.

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

[0036] 1) Get 1.5Kg of the modified clay prepared by the above method and ...

Embodiment 2～5

[0045] The amount of modified clay and amino resin solution in the formula was changed, and the amount of additives was kept unchanged. The modifier was applied to the surface of the tunnel fireproof coating. The results are shown in Table 1.

[0046] Table 1

[0047] Example

Embodiment 6

[0049] Preparation of modified clay:

[0050] 1) Add 3Kg of vermiculite and 150Kg of deionized water into the reaction kettle in sequence, and stir at high speed for 5 minutes;

[0051] 2) After raising the reaction kettle to 60°C, add 1.5Kg of organic intercalation agent octadecyltrimethylammonium chloride and stir vigorously for 15 minutes, then stir at a low speed for 5 hours, and then cool and discharge;

[0052] 3) Centrifuge the product, and wash it repeatedly with ethanol-deionized water with a molar ratio of 1:1 until no precipitation occurs in the centrifuged mother liquor when tested with 0.1mol / L silver nitrate solution;

[0053] 4) Vacuum dry the washed product at 90° C. for 24 hours. The obtained product is modified clay, which is bottled for later use.

[0054] Preparation of polymer / clay surface modifiers:

[0055] 1) Take 2Kg of the modified clay prepared by the above-mentioned method and grind it with water for 3 hours in a ball mill tank, settling statical...

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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 polymer / clay composite modifier prepared by an intercalation modification technology on a nanometer scale. Background technique [0002] Because the tunnel environment is relatively airtight, once a fire breaks out, it is difficult to evacuate people and easily cause heavy casualties. Therefore, it is very important to strengthen tunnel fire protection. 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 concrete moisture content (including physical bound water and molecular bound water), the greater the possibility of bursting. When the unprotected concrete has a mass moisture content of more than 3%, it will die within 5-30 minutes under high tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C09D5/18C08L63/00C08K3/22C08K3/04
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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