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A special polyurethane waterproof coating for underground pipe gallery and its production process

A polyurethane waterproof and underground pipe gallery technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve the problems of many detailed nodes, reduced service life, and easy deformation of the structure, and achieve excellent mechanical properties and good insulation Sexuality and strong adhesion

Active Publication Date: 2020-12-15
WEIFANG HONGYUAN WATERPROOF MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from some projects that have been constructed so far, there are several difficulties that plague the construction and maintenance of the underground pipe gallery project: (1) Difficult to repair, the pipe gallery has been buried underground for a long time, and it is difficult to repair the waterproof layer once leakage occurs ; (2) The service life is long. The service life of the structure of the pipe gallery project is 100 years, and the quality and service life of the waterproof material are high; (3) The structure is easy to deform. Due to the load effect and the influence of surrounding buildings (structures), the structure is prone to deformation and cracking, and waterproof materials are required to adapt well to the deformation of the structure; (4) There are many detailed nodes, and the pipe gallery is an underground slender structure. , deformation joints, wall casings, wall bolts, reserved joints and other joints, it is difficult to waterproof, and waterproof materials are required to have good permeability and bonding strength; The porous system is easily eroded by groundwater, which reduces the service life, and there are high-voltage cables in the pipe gallery. If there are wet stains or water seepage, it is easy to cause corrosion and ignition of the cables, so wet stains and water leakage are not allowed on the surface of the structure

Method used

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  • A special polyurethane waterproof coating for underground pipe gallery and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A special polyurethane waterproof coating for underground pipe gallery, calculated in parts by weight, comprising:

[0025] 36 parts of hyperbranched block polyether polyol, 10 parts of microcrystalline muscovite powder, 11 parts of flame-retardant polyether amine, 9 parts of powder filler, 25 parts of dodecyl carbon diisocyanate, trifunctional oxazolidine copolymer 14 parts of substance, 1.5 parts of adhesion promoter, 2.5 parts of penetrating and leveling agent, and 1 part of penetrating agent.

[0026] The molecular weight of the hyperbranched block polyether polyol is 1800~3000, and the hydroxyl value is 38.5~42.0KOHmg / g;

[0027] The microcrystalline muscovite powder, SiO 2 content ≥ 42%, magnetic content ≥ 280×10 -6 , water content ≤ 0.5%, particle size 800 mesh ~ 2500 mesh.

[0028] The flame-retardant polyetheramine is a halogenated polyetheramine with a bromine content of about 24-31%, a chlorine content of about 7.5-12%, and a hydroxyl value of about 120-15...

Embodiment 2

[0038] A special polyurethane waterproof coating for underground pipe corridors. Compared with Example 1, under the same conditions as Example 1, only the number of flame-retardant polyetheramines is changed, and 8 parts of flame-retardant polyetheramine are used in Example 2. Type polyether amine, the weight parts of other components do not change, and according to the production process of the special polyurethane waterproof coating for underground pipe gallery described in embodiment 1, prepare the special polyurethane waterproof coating for underground pipe gallery.

Embodiment 3

[0040]A special polyurethane waterproof coating for underground pipe corridors. Compared with Example 1, under the same conditions as Example 1, only the number of flame-retardant polyetheramines is changed, and 14 parts of flame-retardant polyetheramine are used in Example 3. Type polyether amine, the weight parts of other components do not change, and according to the production process of the special polyurethane waterproof coating for underground pipe gallery described in embodiment 1, prepare the special polyurethane waterproof coating for underground pipe gallery.

[0041] The performance test of the special polyurethane waterproof coating for underground pipe gallery prepared according to the above three examples, the test results are shown in Table 1:

[0042] Table 1

[0043]

[0044] It can be seen from Table 1 that the effect of the addition amount of flame-retardant polyetheramine on the prepared polyurethane waterproof coating for underground pipe corridors is ...

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Abstract

The invention provides a special polyurethane waterproof coating for an underground pipe gallery and a production process thereof. The waterproof coating contains the following components: hyperbranched block polyether polyol, microcrystal white mica powder, flame-retardant polyether amine, a powder filling agent, dodecyl diisocyanate, a trifunctional oxazolidine copolymer, an adhesion promoter, an osmosis leveling agent and a penetrating agent. The polyurethane waterproof coating is specially applied to the underground pipe gallery; after being sprayed to a concrete base layer, the polyurethane waterproof coating has strong permeability and is very likely to penetrate into a multi-phase and porous structure of concrete so as to realize blockage and isolation effects; and by virtue of theexcellent mechanical properties, elasticity recovery rate and bonding strength, the deformation and cracking of a structure can be prevented, and the structure has high water resistance and durability.

Description

technical field [0001] The invention relates to the field of waterproof coatings, in particular to a special polyurethane waterproof coating for underground pipe corridors and a production process thereof. Background technique [0002] The underground pipe gallery is a large underground space used to accommodate functions such as running water, electricity and telecommunications, hot and cold water pipes, and gas. It can effectively reduce traffic jams caused by road excavation, and at the same time facilitate daily inspections and line maintenance. The underground pipe gallery originated in Europe, and has been in operation for hundreds of years abroad, and has developed relatively maturely, but it is still in the early stage of development in China. [0003] CN201410833840.6 Water-based polyurethane coating containing polyether polyol / nano hybrid material; CN201510813186.7 A kind of high-strength environment-friendly polyurethane flame-retardant waterproof coating and its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D5/25C09D5/18C09D5/08
CPCC08L2201/02C08L2205/035C09D5/00C09D5/08C09D5/18C09D175/08C08L33/04C08L71/02C08K3/36C08K9/08C08K3/346C08K13/06
Inventor 李超陈鸯飞沈春林许渊刘晓东马伟伟魏金祥王威
Owner WEIFANG HONGYUAN WATERPROOF MATERIAL