Manufacturing method and brushing method of cable trench waterstop coating

Abstract

The invention relates to the technical field of coatings, in particular to a cable trench waterstop coating manufacturing method which comprises the steps that first coating is prepared, specifically, acrylic resin emulsion, 2, 4-toluene diisocynate, ethidene diamine, liquid nitrile rubber, deionized water, sodium carbonate and epoxy resin are mixed to obtain the first coating; the filler is smashed and placed in a sodium hydroxide solution to be soaked, filtering and drying are conducted, and the treated filler is obtained; and preparing a second coating: mixing a silicone acrylic emulsion, a silane coupling agent and an aminoethoxy silane-toluene mixed solution to obtain the second coating. According to the preparation method of the cable trench water-stop coating, the coating with better waterproof effect and longer service life can be prepared; the invention also provides a brushing method of the cable trench waterstop paint.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, in particular to a method for preparing and applying a water-stopping coating for a cable trench. Background Art

[0002] The cable trench is generally made of concrete, and the cable trench is required to have a good waterproof effect. In order to achieve a better waterproof effect, a layer of waterproof paint is applied inside the cable trench.

[0003] In the patent document with the publication number of "CN114854264A" and the name of "A pressure-resistant, waterproof and environmentally friendly coating", "A pressure-resistant, waterproof and environmentally friendly coating" is disclosed, which includes, by weight, a film-forming resin, 2,4-toluene diisocyanate, ethylenediamine, pigments and fillers, additives, toughening agents, 2 parts of graphene nanosheets, nanoceramics, hollow glass microspheres, deionized water, and a catalyst; the additive is a mixture of two or more of a dispersant, a defoamer, a preservative, a film-forming agent and a leveling agent; the catalyst is one of organic tin or polyamine.

[0004] However, such coatings still have the disadvantage of poor waterproofing effect, and also have the disadvantage of poor durability (i.e. short service life). Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned shortcomings and provide a method for preparing a cable trench water-stopping coating with better waterproof effect and longer service life, a cable trench water-stopping coating and a method for applying the coating.

[0006] The technical solution of the manufacturing method of the cable trench water-stopping coating of the present invention is as follows: A manufacturing method of the cable trench water-stopping coating comprises: The first coating is prepared by mixing, by weight, 30 to 32 parts of acrylic resin emulsion, 4 to 6 parts of 2,4-toluene diisocyanate, 2 to 3 parts of ethylenediamine, 0.05 to 0.1 parts of liquid nitrile rubber, 15 to 22 parts of deionized water, 0.05 to 0.1 parts of sodium carbonate and 5 to 10 parts of epoxy resin to obtain the first coating.

[0007] Preparation of treated filler: crush the filler into powder of 1-10 μm, soak it in 10-20% 20-30° C. sodium hydroxide solution for 60-90 minutes, adjust the pH to 3-4 with hydrochloric acid, filter and dry to obtain treated filler; the filler is at least one of nano-ceramic micropowder or hollow glass microbeads in 2-3 parts, 5-10 parts of graphene nanopowder.

[0008] Furthermore, the method also includes preparing a second coating: by weight, 3 to 6 parts of silicone acrylic emulsion, 5 to 12 parts of silane coupling agent, and 5 to 12 parts of aminoethoxysilane-toluene mixed liquid are mixed to obtain the second coating.

[0009] The technical solution of the cable trench water-stopping coating of the present invention is as follows: the cable trench water-stopping coating is the coating obtained by the above method.

[0010] The technical solution of the cable trench water-stopping paint brushing method of the present invention is as follows: during the cable trench water-stopping paint brushing method, the first paint is kept warm to 20-30°C, the treated filler is heated to 40-50°C, and the mixture is mixed in a mass ratio of first paint: treated filler = 5-7:1, and sprayed onto the construction base surface within 2-3 hours.

[0011] Furthermore, the second coating is kept warm at 20-30°C, mixed according to the mass ratio of first coating: second coating: treated filler = 5-7:1-2:1, and sprayed onto the construction base surface.

[0012] The beneficial effects of the present invention are: such coating has the advantages of better waterproof effect and longer service life; Such a method for making a waterproof coating for a cable trench can produce the above-mentioned coating; Such a method of applying water-stopping paint to cable trenches can obtain a construction base surface with better waterproofing effect and longer service life. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the embodiments.

[0014] The raw materials used in the present invention are all common raw materials.

[0015] Example 1 The following table shows the mass of each component used to prepare the first coating (unit: kilogram):

[0016] The raw materials of the above components are mixed to obtain a first A coating, a first B coating, a first C coating, a first D coating, and a first E coating respectively.

[0017] Example 2 The following table shows the mass of each component of the prepared and treated filler (unit: kilogram):

[0018] The filler (graphene nanopowder, nano-ceramic micropowder) is crushed into powder of 1 to 10 μm or hollow glass microbeads of 1 to 10 μm are used, and the powder is placed in a 10 to 20% sodium hydroxide solution at 20 to 30°C and soaked for 60 to 90 minutes, and the pH is adjusted to 3 to 4 with hydrochloric acid, filtered, and dried to obtain a treated filler; the filler is at least one of nano-ceramic micropowder or hollow glass microbeads in 2 to 3 parts, 5 to 10 parts of graphene nanopowder.

[0019] Example 3 When painting, the first coating (including the first A coating, the first B coating, the first C coating, the first D coating, and the first E coating) is kept warm to 20-30°C, the treated filler (including the A treated filler, the B treated filler, etc.) is heated to 40-50°C, and the first coating: the treated filler is mixed according to the mass ratio of 5-7:1, and sprayed on the construction base within 2-3 hours to obtain multiple construction bases containing coating layers. After testing, the construction bases containing coating layers obtained by using the coating in the prior art have significantly improved waterproof effect and durability. For example, in a humid environment, the water content is below 1% for a long time, and it does not crack when used for 3-5 years.

[0020] Example 4 The following table shows the mass of each component used to prepare the second coating (unit: kilogram): Raw material name Component 1 Second component The third component The fourth component The fifth component Silicone acrylic emulsion 3 6 4.5 5 4 Silane coupling agent 5 12 8 7 8 Aminoethoxysilane-toluene mixture 5 12 8 7 8 The name of the paint obtained Second A coating Second B coating Second C coating Second D coating Second E coating The raw materials of the above components are mixed to obtain a second A coating, a second B coating, a second C coating, a second D coating, and a second E coating respectively; Example 5 When painting, keep the first paint at 20-30°C, keep the second paint at 20-30°C, heat the treated filler to 40-50°C, mix them according to the mass ratio of first paint: second paint: treated filler = 5-7:1-2:1, and spray them onto the construction base surface.

[0021] After testing, the construction base surface of the coating layer obtained by using the coating in the prior art has significantly improved in waterproof effect and durability. For example, in a humid environment, the water content is below 0.7-0.8% for a long time, and it will not crack after 6 to 7 years of use.

[0022] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for preparing a cable trench waterproof coating, comprising: Prepare a first coating, which includes, by weight, 30-32 parts of acrylic resin emulsion, 4-6 parts of 2,4-toluene diisocyanate, 2-3 parts of ethylenediamine, 0.05-0.1 parts of liquid nitrile rubber, 15-22 parts of deionized water, 0.05-0.1 parts of sodium carbonate, and 5-10 parts of epoxy resin, and mixes to obtain the first coating; Preparation of treated filler: crush the filler into powder of 1-10 μm, soak it in 10-20% 20-30° C. sodium hydroxide solution for 60-90 minutes, adjust the pH to 3-4 with hydrochloric acid, filter and dry to obtain treated filler; the filler is at least one of nano-ceramic micropowder or hollow glass microbeads in 2-3 parts, 5-10 parts of graphene nanopowder.

2. The method for preparing the cable trench waterproofing coating according to claim 1 also includes preparing a second coating: by weight, 3 to 6 parts of silicone acrylic emulsion, 5 to 12 parts of silane coupling agent, and 5 to 12 parts of aminoethoxysilane-toluene mixture are mixed to obtain the second coating.

3. A waterproof coating for a cable trench, which is the waterproof coating obtained according to claim 1 or 2.

4. A method for applying a waterproof coating for a cable trench, comprising: using the waterproof coating for a cable trench as claimed in claim 3, keeping the first coating insulated at 20-30°C, heating the treated filler to 40-50°C, mixing the first coating at a mass ratio of 5-7:1 to the treated filler, and spraying the mixture onto the construction base within 2-3 hours.

5. According to the cable trench waterproofing paint coating method of claim 4, the second paint is also kept warm to 20-30°C, mixed in a mass ratio of first paint: second paint: treated filler = 5-7:1-2:1, and sprayed onto the construction base surface.

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