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A kind of high-strength polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof and high-strength technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of unbalanced overall product performance indicators and decreased toughness, and achieve the elimination of waterproof weak points, no cracking, and tight coating Effect

Active Publication Date: 2022-01-04
WEIFANG HUAGUANG WATERPROOF MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems in this patent: From the test results of the examples, it can be seen that after the polyurethane waterproof coating is cured and formed into a film, there is a negative correlation between its tensile strength and its toughness
Problems in this patent: From the performance indicators of Examples 1-3, it can be seen that after the polyurethane waterproof coating is cured and formed into a film, there is a negative correlation between its tensile strength and its toughness
When improving the tensile strength of waterproof coatings, its toughness shows a downward trend, and the overall performance indicators of the product are uneven

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A high-strength polyurethane waterproof coating is a two-component polyurethane waterproof coating.

[0043] The raw materials of the high-strength polyurethane waterproof coating include material A and material B; material A: material B = 1:1.

[0044] The raw material composition and application weight parts of the material A are: 30 parts of polyether glycol, 25 parts of polyether polyol, 5 parts of polyether, 8 parts of hydroxyl silicone oil, 5 parts of tetrabutylammonium bisulfate, diphenylmethane- 4, 5 parts of 4'-diisocyanate, 3 parts of flake graphite powder.

[0045] Described polyether glycol comprises polyether glycol N-210 and polyether glycol N-240, and the weight ratio of described polyether glycol N-210: polyether glycol N-240 is 1:3.

[0046] The polyether polyol is polyether polyol EP-330n.

[0047] The polyether is polyether EP-8000.

[0048] The mesh number of the flake graphite powder is 1000 mesh.

[0049] The raw material composition and applica...

Embodiment 2

[0066] A high-strength polyurethane waterproof coating is a two-component polyurethane waterproof coating;

[0067] The raw materials of the high-strength polyurethane waterproof coating include material A and material B; material A: material B = 1:1.3.

[0068] The raw material composition and application weight parts of the material A are: 32 parts of polyether glycol, 20 parts of polyether polyol, 6 parts of polyether, 8 parts of hydroxyl silicone oil, 3 parts of tetrabutylammonium bisulfate, diphenylmethane- 4, 3 parts of 4'-diisocyanate, 4 parts of flake graphite powder.

[0069] Described polyether glycol comprises polyether glycol N-210 and polyether glycol N-240, and the weight ratio of described polyether glycol N-210: polyether glycol N-240 is 1:3.

[0070] The polyether polyol is polyether polyol DL-2000d.

[0071] The polyether is polyether EP-8000.

[0072] The mesh number of the flake graphite powder is 1000 mesh.

[0073] The raw material composition and ap...

Embodiment 3

[0090] A high-strength polyurethane waterproof coating is a two-component polyurethane waterproof coating;

[0091] The raw materials of the high-strength polyurethane waterproof coating include material A and material B; material A: material B = 1:1.7.

[0092] The raw material composition and application weight parts of the material A are: 33 parts of polyether glycol, 25 parts of polyether polyol, 7 parts of polyether, 9 parts of hydroxyl silicone oil, 4 parts of tetrabutylammonium bisulfate, diphenylmethane- 4, 4 parts of 4'-diisocyanate, 4 parts of flake graphite powder.

[0093] Described polyether glycol comprises polyether glycol N-210 and polyether glycol N-240, and the weight ratio of described polyether glycol N-210: polyether glycol N-240 is 1:3.

[0094] The polyether polyol is polyether polyol EP-330n and polyether polyol DL-2000d, and the weight ratio of polyether polyol EP-330n:polyether polyol DL-2000d is 1:1.

[0095] The polyether is polyether EP-8000.

...

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Abstract

The invention provides a high-strength polyurethane waterproof coating, which is a two-component polyurethane waterproof coating. It is characterized in that the raw materials of the high-strength polyurethane waterproof coating include material A and material B, and the material A includes: polyether binary Alcohol, polyether, hydroxyl silicone oil, the B material includes: petroleum resin, boron phenolic resin. The present invention also provides a preparation method of high-strength polyurethane waterproof coating, wherein the preparation of material A includes a modification step; the preparation of material B includes an ultrasonic dispersion step. The beneficial effects of the present invention are: the tensile strength of the waterproof paint coating is 16.2-19.3MPa after curing, and the elongation at break is 560-640%; the construction of the waterproof paint is less affected by the ambient temperature and humidity, and at an ambient temperature of -20°C, its The curing time of the wet base surface of the waterproof coating is ≤2.5h, the bonding strength of the wet base surface is 6.3‑7.8MPa, and the curing shrinkage rate is 0.08~0.13%.

Description

technical field [0001] The invention relates to the field of waterproof coatings, in particular to a high-strength polyurethane waterproof coating and a preparation method thereof. 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 has the characteristics of reaction curing (moisture curing) coating, high strength, high elongation, good water resistance, etc., and has strong adaptability to the deformation of the base layer. 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. Polyurethane waterproo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D7/61
CPCC09D175/08C09D7/61C09D7/70C08K2201/005C08K2003/328C08K2201/003C08K2201/016C08K13/04C08K7/08C08K3/346C08K7/10C08K3/32C08K3/042
Inventor 刘建华杨建修
Owner WEIFANG HUAGUANG WATERPROOF MATERIALS
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