Single-component polyurethane waterproof coating

A polyurethane waterproof, single-component technology, which is applied in the field of building waterproof materials, can solve the problems of slow sedimentation of powder particles, inability to thickly coat during construction, and uneven coating film, so as to prevent the sedimentation of powder components and improve storage stability , Improve the effect of film quality

Inactive Publication Date: 2020-10-13
湖北九阳防水材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CO is released during the curing process 2 Gas, which is easily disturbed by the humidity of the construction environment during the construction process, can not be thickly coated during construction, and the cured coating film is prone to non-compactness, air bubbles and pinholes, which seriously affects the construction quality and promotion of one-component polyurethane waterproof coatings application
Moreover, in the actual application

Method used

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  • Single-component polyurethane waterproof coating

Examples

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Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] A one-component polyurethane waterproof coating. The raw material components are shown in Table 1. All components are calculated in parts by weight. It is prepared by the following steps: (1) Add isocyanate and polyether polyol into the reaction kettle at room temperature, pass nitrogen into the reaction kettle, and stir and react at 100°C for 3 hours; The temperature is reduced to 80℃, and the epoxidized soybean oil and talc are sequentially added to the reactor, and stirred and mixed for 2h; (3) The temperature of the reactor is reduced to 60℃, and 4-phenyl-2-oxazole is added to the reactor. Alkanone, N-methyl-2,4-dinitroaniline and tertiary amine catalyst, stir and mix for 30 minutes, reduce the temperature in the reactor to below 50℃, and discharge under nitrogen protection to obtain a one-component polyurethane Waterproof coating precursor; (4) The one-component polyurethane waterproof coating precursor obtained in step (3), starch-polyacrylamide h...

Example Embodiment

[0029] Example 2

[0030] A one-component polyurethane waterproof coating, different from Example 1, the raw material components are shown in Table 1.

Example Embodiment

[0031] Example 3

[0032] A one-component polyurethane waterproof coating, different from Example 1, the raw material components are shown in Table 1.

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Abstract

The invention belongs to the technical field of building waterproof materials, and discloses a single-component polyurethane waterproof coating. The coating comprises the following raw materials in parts by weight: 20-30 parts of polyether polyol, 20-30 parts of isocyanate, 0.5-1 part of starch-polyacrylamide hydrogel, 15-25 parts of a plasticizer, 10-20 parts of a filler, 2-5 parts of a curing agent, 0.6-0.8 part of a catalyst and 0.5-1 part of a coupling agent. A preparation process of the starch-polyacrylamide hydrogel comprises the following steps: sequentially adding a potassium persulfate initiator, an acrylamide monomer and a polyethylene glycol acrylate cross-linking agent into a starch solution, carrying out uniform mixing after each component is added, and carrying out heating for a sufficient reaction so as to obtain the starch-polyacrylamide hydrogel. According to the single-component polyurethane waterproof coating disclosed by the invention, CO2 released in the process ofcuring and film-forming is effectively removed, the phenomena of uncompactness, bubbles and pinholes of a cured coating film are avoided, the precipitation of powder of the waterproof coating in a storage process is effectively reduced, and the storage stability of the single-component polyurethane waterproof coating is improved.

Description

technical field [0001] The invention belongs to the technical field of building waterproof materials, in particular to a single-component polyurethane waterproof coating. Background technique [0002] Polyurethane waterproof coatings are prepolymers containing isocyanate groups formed by addition polymerization of isocyanate and polyether, together with catalysts, anhydrous additives, anhydrous fillers, solvents, etc., and processed through mixing and other processes One-component polyurethane waterproof coating. This type of coating is a reaction-curing (moisture-curing) coating, which has the characteristics of high strength, high elongation, and good water resistance. Strong adaptability to base deformation. Polyurethane waterproof coating is a single-component environmentally friendly waterproof coating for liquid construction. It is based on imported polyurethane prepolymer and has no additives such as tar and asphalt. It solidifies after exposure to moisture in the ...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/61C09D7/65C09D7/63C09D5/33C09D5/32C09D7/48
CPCC08K2003/2241C08L2201/08C08L2205/035C09D5/004C09D5/32C09D175/08C09D7/48C09D7/61C09D7/63C09D7/65C08L3/02C08L33/26C08K13/02C08K3/22C08K5/101C08K5/32C08K5/353C08K3/34C08L5/00
Inventor 占波邓小磊张涛袁俊
Owner 湖北九阳防水材料科技有限公司
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