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Waterborne polyurethane waterproof coating and preparation method thereof

A water-based polyurethane and waterproof coating technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve problems such as lack of mature technology, and achieve the effects of strong self-cleaning, low human toxicity, and good weather resistance

Active Publication Date: 2017-03-15
北京奥克兰防水工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, there is no mature technology to prepare a water-based polyurethane coating that is waterproof, light, high fire resistance, high weather resistance, environmental protection, not easy to age, and long-lasting. Therefore, people are still working on water-based coatings. research experiment

Method used

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  • Waterborne polyurethane waterproof coating and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment l

[0044] Add 1 part of N-methylol acrylamide and 0.5 parts of citric acid in sequence in the reaction kettle, wherein, N-methylol acrylamide needs to be diluted, that is, add 2 kg of N-methylol acrylamide by weight Dissolve ethanol with a concentration of 50-70%, then stir and raise the temperature. Before the temperature rises to 62°C, add 40 parts of polyurethane prepolymer at one time, then raise the temperature to 82°C, keep the reaction at 83°C for 2 hours, and cool down to Discharge at 52°C to obtain component A; mix 16 parts of inorganic fillers in component B (10 parts of schist-type high-quality sericite powder, the diameter-thickness ratio of the wafer is 50-60 times, and the original average particle size of 6 parts d=1~ 5 μm micronized calcium carbonate), 2 parts of dibutyl phthalate, 1 part of crosslinking agent (0.5 part of monoalkoxypyrophosphate titanate coupling agent, 0.5 part of isopropanol), 0.1 part of Disc-40, 0.1 part of tributyl phosphate, 0.5 part of tri...

Embodiment 2

[0046] Add 1.5 parts of N-methylolacrylamide and 0.7 parts of citric acid in sequence in the reaction kettle. Among them, N-methylolacrylamide needs to be diluted, that is, add 2 kg of N-methylolacrylamide by weight Dissolve ethanol with a concentration of 50-70%, then stir and raise the temperature. Before the temperature rises to 62°C, add 45 parts of polyurethane prepolymer at one time, then raise the temperature to 82°C, keep the reaction at 84°C for 2.5 hours, and cool down to Discharge at 53°C to get component A; mix 18 parts of inorganic fillers in component B (11 parts of schist-type high-quality sericite powder, the diameter-thickness ratio of the wafer is 50-60 times, and 7 parts of the original average particle size d=1~ 5μm micronized calcium carbonate), 3 parts of dibutyl phthalate, 2 parts of crosslinking agent (1 part of monoalkoxypyrophosphate titanate coupling agent, 1 part of isopropanol), 0.2 parts of Si Disc-60, 0.2 part of tributyl phosphate, 0.7 part of t...

Embodiment 3

[0048] Add 2 parts of N-methylolacrylamide and 1 part of citric acid in sequence in the reaction kettle. Among them, N-methylolacrylamide needs to be diluted, that is, add 2 kg of N-methylolacrylamide by weight Dissolve ethanol with a concentration of 50-70%, then stir and raise the temperature. Before the temperature rises to 62°C, add 50 parts of polyurethane prepolymer at one time, then raise the temperature to 82°C, keep the reaction at 85°C for 2.5 hours, and cool down to Discharge at 54°C to obtain component A; mix 24 parts of inorganic fillers in component B (15 parts of schist-type high-quality sericite powder, the diameter-thickness ratio of the wafer is 50-60 times, and 9 parts of the original average particle size d=1~ 5μm micronized calcium carbonate), 5 parts of dibutyl phthalate, 3 parts of crosslinking agent (1.5 parts of monoalkoxypyrophosphate titanate coupling agent, 1.5 parts of isopropanol), 0.3 parts of Si Pan-80, 0.3 part of tributyl phosphate, 1 part of ...

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Abstract

The invention provides an aqueous polyurethane waterproof paint and a preparation method thereof. The paint comprises a component A and a component B, wherein the component A is composed of polyurethane performed polymer, N-methylolacrylamide and citric acid, and the component B is composed of an inorganic filling material, a plasticizer, a cross-linking agent, an emulsifier, an antifoaming agent, a catalyst, pigment and water. The preparation method comprises the following steps: successively adding N-methylolacrylamide and citric acid according to desired weight parts, carrying out stirring and heating, adding the polyurethane performed polymer in one shot before temperature rises to 62 DEG C, then carrying out heating to 82 DEG C, carrying out a reaction at a constant temperature of 83 to 85 DEG C for 2 to 3 h and then carrying out cooling to 52 to 54 DEG C so as to obtain the component A; successively adding raw materials of the component B into a reaction vessel stirrer according to desired weight parts, carrying out uniform mixing through stirring and grinding the mixed materials to a fineness of 51 to 55 [mu]m in a three-roller machine so as to obtain the component B; and uniformly mixing the component A with the component B according to a weight ratio of 1: 2 so as to obtain the aqueous polyurethane waterproof paint. The aqueous polyurethane waterproof paint has the characteristics of high temperature resistance, good weatherability, good waterproof performance, etc.

Description

technical field [0001] The invention relates to a preparation method of a coating, in particular to a water-based polyurethane waterproof coating, which belongs to the technical field of chemical composition and its preparation. Background technique [0002] In order to study paints with volatile organic compounds (VOC) below the regulations, paint scientists have so far created a series of new paint and coating technology systems: powder coatings, radiation-cured coatings (UV / EB systems), water-based coatings , High-solid coatings and solvent-free coatings, among which powder coatings and radiation-cured coatings require special equipment for construction; although high-solid coatings are very close to ordinary solvent-based coatings in performance, they are still inconvenient in construction For example, construction equipment is difficult to clean and thermal sag phenomenon, etc.; and solvent-free coatings generally refer to solvent-free epoxy floor coatings, and their sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D5/08C09D7/12
CPCC08G18/6715C08K3/22C08K3/26C08K3/34C08K5/12C08K5/521C08K13/02C08K2003/2272C08K2003/265C09D5/08C09D7/48C09D7/61C09D7/63C09D175/14
Inventor 谢刚韦冠川韦福达
Owner 北京奥克兰防水工程有限责任公司
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