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Single-component thickly-coated anti-sagging polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof and waterproof coating technology, applied in the direction of coating, etc., can solve the problems of waterproof coating flow, poor waterproof effect, and difficulty in forming a coating film with uniform thickness, so as to save the construction period

Inactive Publication Date: 2016-12-07
JIANGSU CANLON BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When constructing on facades and slopes, due to its own gravity, the paint will flow and fall before the film is formed, it is difficult to form a uniform thickness of the film, and finally the waterproof effect is not ideal
Moreover, when traditional polyurethane waterproof coatings are applied on facades and slopes, more than 10 times of spraying is required to form a coating film of 1 mm. Because traditional polyurethane waterproof coatings flow seriously, it is not suitable for mechanical spraying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The present embodiment provides a kind of waterproof coating, and its preparation method is as follows:

[0051] Add 690kg polyether 2000 and 3050, 490kg composite plasticizer (DINP and DIDP, the mass ratio is 1:1) and 1.5kg silane coupling agent into the high-speed dispersion tank, and start stirring and heating. Put 150kg of gypsum whiskers and 1250kg of heavy calcium powder into the dispersion kettle slowly, and stir while adding to make the powder fully dispersed. After adding the powder, keep the material temperature in the reactor at 110~120℃. Afterwards, vacuumize for 2.5 hours at a constant temperature and a pressure of -0.08MPa, and then add 150kg of No. 100 solvent oil at 100°C to cool the material to 75~80°C. Then add 185kg of diphenylmethane diisocyanate into the reactor and react at 70~85°C for 2 hours, stop heating after the reaction is completed. Then add 233.5kg of thixotropic liquid and 1.5kg of dibutyltin dilaurate, 3kg of BYK0660N defoamer, 24kg of c...

Embodiment 2

[0056] Add 750kg of polyether 3050 and 2000, 630kg of chlorinated paraffin and 1.5kg of silane coupling agent into the high-speed dispersion tank, and start stirring and heating. Put 250kg of nano-calcium carbonate and 1150kg of heavy calcium powder into the dispersion kettle slowly, and stir while adding to make the powder fully dispersed. After adding the powder, keep the material temperature in the reactor at 110~120°C. Afterwards, vacuumize for 2.5 hours at a constant temperature and a pressure of -0.08MPa, and add 100kg of No. 100 solvent oil at 100°C to cool the material to 75~80°C. Add 175kg of toluene diisocyanate into the reactor and react at 70~85°C for 2 hours, then stop heating. Add 280.5kg of thixotropic liquid, 1.5kg of stannous octoate, 3.7kg of organosilicon defoamer, and 21kg of magnesium oxide into the reactor, and stir at -0.08MPa for 15 minutes. Stop stirring, and lower the temperature, vacuumize, and start discharging. After the material is discharged, c...

Embodiment 3

[0061] Add 880kg polyether polyol (alcohol polyether 2000 and polyether 3050, the mass ratio is 1:1), 510kg composite plasticizer (DINP and chlorinated paraffin, the mass ratio is 1:1) and 3kg silane coupling agent Put it into a high-speed dispersing kettle, and start stirring and heating. Put 350kg of nano-calcium carbonate and 1050kg of heavy calcium powder into the dispersion kettle slowly, and stir while adding to make the powder fully dispersed. After adding the powder, keep the material temperature in the reactor at 110~120°C. Afterwards, keep constant temperature and vacuumize for 2.5 hours under the pressure of -0.08MPa, and cool the material to 75~80°C. Add 195kg diphenylmethane diisocyanate into the reactor and react at 70~85°C for 2 hours, then stop heating. Add 276.5kg of thixotropic liquid, 1.5kg of dibutyltin dilaurate, 3.7kg of silicone defoamer, and 21kg of oxazolidine latent curing agent into the reaction kettle, and stir at -0.08MPa for 15 minutes. Stop sti...

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Abstract

The invention relates to a single-component thickly-coated anti-sagging polyurethane waterproof coating and a preparation method thereof. The waterproof coating comprises the following raw materials in percentage by weight: 21-27% of polyether polyol, 5-8% of isocyanate, 15-22% of plasticizer, 0.03-0.1% of dispersant, 35-50% of filler, 0.05-0.2% of dehydrating agent, 0.5-2% of thixotropic agent, 0.03-0.2% of catalyst, 0.2-1% of defoaming agent and 0-15% of solvent. Vertical and oblique planes can be thickly coated with the waterproof coating; the coating thickness of the coating on the vertical and oblique planes at one time can reach 1mm-1.5mm without obvious sagging; the requirement that specific waterproof required thickness is realized by coating for one time is met; the construction period is reduced; the waterproof coating is extremely suitable for mechanical spraying.

Description

technical field [0001] The invention specifically relates to a one-component anti-sagging facade and inclined surface thickly sprayed polyurethane waterproof coating and a preparation method thereof. Background technique [0002] At present, some large-scale projects in China, such as South-to-North Water Diversion, basement walls of large-scale system venues, high-speed railways, subways, tunnels, civil air defense, etc., require waterproofing construction on facades or slopes. Because it is a facade or a slope surface, etc., the construction is inconvenient and prone to quality problems. Waterproof paint can be used to form a seamless waterproof layer, but the general-purpose paint will flow when it is painted on the facade or slope, causing the upper part to be thin and the lower part to be thick. The upper part cannot afford the thickness, and the thickness of the coating film is uneven. If you want to paint a 1.5mm thick coating film, you may need to paint it four or f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/12C08G18/48
CPCC09D175/08C08G18/4804C08K2201/011C08K2201/014C08L2205/03C09D7/62C09D7/63C09D7/65C09D7/67C09D7/70C08L91/06C08K13/06C08K2003/265C08K2003/222C08K3/36C08K3/346
Inventor 赵祖兵李忠人贺小钢
Owner JIANGSU CANLON BUILDING MATERIALS
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