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Semi-latent curing type single-component polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof, one-component technology, applied in the field of materials, can solve the problems of water leakage risk, short storage time, poor performance, etc., and achieve the effect of no bubbles in appearance, precise addition amount, and excellent storage performance

Inactive Publication Date: 2020-05-08
河南东方雨虹建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current one-component polyurethane waterproof coating generally has a large number of bubbles in the coating film, poor performance after construction, and the risk of water leakage, or the defect of short storage time

Method used

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  • Semi-latent curing type single-component polyurethane waterproof coating and preparation method thereof
  • Semi-latent curing type single-component polyurethane waterproof coating and preparation method thereof
  • Semi-latent curing type single-component polyurethane waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1) 225g polyether glycol, 62g polyether triol, 30.35g chlorinated paraffin, 54.1g synthetic vegetable ester, 29.4g DINP, 2.1g defoamer BYK-065, 1g acidic dispersant non-special FT-202, 115g talcum powder and 329g heavy calcium are stirred evenly at a rotation speed of 200-400r / min, then heated to 95-115℃, and then vacuum dehydrated at a pressure of -0.09 to -0.1MPa and a temperature of 105-110℃ for 1 to 3h;

[0055] 2) When the moisture content of the mixture in step 1) is ≤0.02wt%, start to cool; when the temperature drops to 75~85℃, add 85g of 150# solvent oil; when the temperature continues to drop to 60~70℃, add 39.85 g TDI-80, stir for 5-15min, then heat to 80~90℃, react for 1~3h;

[0056] 3) Cool the mixture obtained in step 2) to 60~70℃, then add 0.5g of organotin catalyst T-12 and stir for 2~8min, then heat up to 70~80℃, and react for 0.2~0.8h;

[0057] 4) Cool the mixture obtained in step 3) to 60~70℃, add 15g latent curing agent ALT-402, 1g leveling agent AFCONA 323...

Embodiment 2

[0062] 1) 105.89g polyether glycol, 37.4g polyether triol, 20.66g chlorinated paraffin, 21g synthetic vegetable ester, 18.97g DINP, 1.72g defoamer BYK-065, 0.57g acidic dispersant non-special FT -202, 61.53g talcum powder and 188.31g heavy calcium are stirred evenly at a speed of 200~400r / min, then heated to 95~115℃, and then vacuum dehydrated at a pressure of -0.09 to -0.1MPa and a temperature of 105~110℃ for 1~ 3h;

[0063] 2) When the moisture content of the mixture in step 1) is ≤0.02wt%, start to cool down; when the temperature drops to 75~85℃, add 48.66g 150# solvent oil; when the temperature continues to drop to 60~70℃, add After 22.81g TDI-80, stir for 5~15min, then heat to 80~90℃, react for 1~3h;

[0064] 3) Cool the mixture obtained in step 2) to 60~70℃, then add 0.29g of organotin catalyst T-12, stir for 2~8min, then heat up to 70~80℃, and react for 0.2~0.8h;

[0065] 4) Cool the mixture obtained in step 3) to 60~70℃, add 5.60g latent curing agent ALT-402, 0.57g leveling...

Embodiment 3

[0071] 1) Combine 450g polyether glycol, 132g polyether triol, 83.03g chlorinated paraffin, 60.7g synthetic vegetable ester, 124.43g DINP, 6.9g defoamer BYK-065, 2.3g acidic dispersant non-special FT- 202,247.25g talcum powder and 783.43g heavy calcium are stirred evenly at a speed of 200~400r / min, then heated to 95~115℃, and then vacuum dehydrated at a pressure of -0.09 to -0.1MPa and a temperature of 105~110℃ for 1~3h ;

[0072] 2) When the moisture content of the mixture in step 1) is ≤0.02wt%, start to cool; when the temperature drops to 75~85℃, add 205.6g of 150# solvent oil; when the temperature continues to drop to 60~70℃, add After 91.66g TDI-80, stir for 5~15min, then heat to 80~90℃, react for 1~3h;

[0073] 3) Cool the mixture obtained in step 2) to 60~70℃, then add 1.15g organotin catalyst T-12, stir for 2~8min, then heat up to 70~80℃, react for 0.2~0.8h;

[0074] 4) Cool the mixture obtained in step 3) to 60~70℃, add 27.58g latent curing agent ALT-402, 2.3g leveling age...

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Abstract

The invention belongs to the field of materials, and discloses a semi-latent curing type single-component polyurethane waterproof coating and a preparation method thereof. The preparation method comprises the following steps: 1) uniformly mixing polyether polyol, a plasticizer, a defoaming agent, a dispersing agent and solid powder, heating, and carrying out vacuum dehydration; 2) when the moisture content in the mixture in the step 1) is less than or equal to 0.02 wt%, and cooling the mixture, when the temperature is reduced to 75-85 DEG C, adding solvent oil, continuously cooling the mixtureto 60-70 DEG C, adding isocyanate, then heating the mixture to 80-90 DEG C, and carrying out a reaction; 3) cooling the mixture obtained in the step 2), then adding a catalyst, heating the mixture, and carrying out a reaction; and 4) cooling the mixture obtained in the step 3), adding a latent curing agent and a leveling agent, continuously cooling to 40-60 DEG C, and degassing the product undervacuum to obtain the semi-latent curing type single-component polyurethane waterproof paint which has the advantages of no bubbles in appearance, high drying speed and favorable storage performance.

Description

Technical field [0001] The invention belongs to the field of materials, and more specifically, relates to a semi-latent curing type one-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] At present, the waterproof coatings used in the market mainly include polyurethane waterproof coatings, acrylic waterproof coatings, polymer cement composite waterproof coatings and polymer modified emulsified asphalt waterproof coatings. Among them, polyurethane waterproof coatings have been widely recognized and applied in the construction industry for their excellent physical, chemical and construction properties. Polyurethane waterproof coatings are mainly divided into two-component polyurethane waterproof coatings and two-component polyurethane waterproof coatings. The two-component polyurethane waterproof coating is mixed at the construction site. Due to the inaccurate mixing ratio and uneven mixing, problems such as blistering, bulgin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C08G18/48
CPCC08G18/4812C09D175/08
Inventor 周银靳曦刘操孙建李海章
Owner 河南东方雨虹建筑材料有限公司
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