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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 process, due to the action of gravity, the powder particles settle slowly, resulting in the formation of dense powder sediment at the bottom of the packaging barrel, which is difficult to stir and disperse
One-component polyurethane waterproof coatings sometimes have precipitation, skinning, and non-curing phenomena during the storage period, which seriously affects the construction and project quality, and also causes a lot of waste in cost

Method used

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  • Single-component polyurethane waterproof coating

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A kind of one-component polyurethane waterproof coating, the raw material components are as shown in Table 1, and all components are in parts by weight. It is prepared by the following steps: (1) at room temperature, add isocyanate and polyether polyol into the reaction kettle, feed nitrogen into the reaction kettle, and stir at a constant temperature of 100 ° C for 3 hours; (2) put the reaction kettle When the temperature drops to 80°C, add epoxidized soybean oil and talc powder to the reactor in sequence, and stir and mix for 2 hours; (3) Lower the temperature of the reactor to 60°C, add 4-phenyl-2-oxazole to the reactor Alkanone, N-methyl-2,4-dinitroaniline, and tertiary amine catalysts were stirred and mixed for 30 minutes, the temperature in the reactor was lowered to below 50°C, and the material was discharged under nitrogen protection to obtain a single-component polyurethane Waterproof paint precursor; (4) adding step (3) gained single-component polyurethane wat...

Embodiment 2

[0030] A kind of one-component polyurethane waterproof coating, the difference from Example 1, the components in the raw materials are shown in Table 1.

Embodiment 3

[0032] A kind of one-component polyurethane waterproof coating, the difference from Example 1, the components in the raw materials 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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