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Self-crosslinked one-component polyurethane waterproofing coating

A waterproof coating and self-crosslinking technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor water resistance of water-based coatings, and achieve excellent mechanical properties, water resistance, and excellent waterproof performance

Active Publication Date: 2014-12-10
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the prior art, the present invention prepares a water-based self-crosslinking polyurethane waterproof coating with high water resistance and convenient construction. By controlling the ratio of NCO / OH (hard-soft segment ratio) and adjusting and applying the self-crosslinking monomer Type and dosage, effectively solve the problem of poor water resistance of water-based coatings, while having good mechanical properties and low temperature flexibility

Method used

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  • Self-crosslinked one-component polyurethane waterproofing coating

Examples

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Embodiment 1

[0018] 1000 grams of polyoxypropylene ether diol, 400 grams of polyoxypropylene ether triol, 100 grams of plasticizer, control the temperature at 105-115°C, and dehydrate for 1-4 hours under the condition of vacuum degree of -0.08-0.1MPa, add 290 grams of toluene diisocyanate, 40 grams of 1,4-butanediol, 50 grams of dimethylol propionic acid, 20 grams of self-made diethanolamine diacetone propionamide and 1 gram of dibutyltin dilaurate, continue to stir, at 80 ℃ Keep warm and react for 8 hours; after cooling down to below 50°C, add 100 grams of acetone and emulsify under high-speed stirring; add 30 grams of isophorone diamine and continue stirring for 1 to 2 hours; heat up to 60°C, The solvent is removed for 2 hours under the condition of vacuum degree of -0.08-0.1MPa; 6g of adipic hydrazide is added at room temperature, stirred for 1 hour until uniform, and the waterproof coating of the present invention is obtained after discharging.

Embodiment 2

[0020] 1000 grams of polyoxypropylene ether diol, 400 grams of polyoxypropylene ether triol, 100 grams of plasticizer, control the temperature at 105-115°C, and dehydrate for 1-4 hours under the condition of vacuum degree of -0.08-0.1MPa, add 417 grams of diphenylmethane diisocyanate, 40 grams of 1,4-butanediol, 50 grams of dimethylolpropionic acid, 20 grams of homemade diethanolamine diacetone propionamide and 1 gram of dibutyltin dilaurate, continue to stir, Insulate and react at 80°C for 8 hours; after cooling down to below 50°C, add 100 grams of acetone and emulsify with water under high-speed stirring; add 30 grams of isophorone diamine and continue stirring for 1 to 2 hours; heat up to 60 °C, desolventize for 2 hours under the condition of vacuum degree of -0.08 ~ 0.1MPa; add 6g of adipic dihydrazide at room temperature, stir for 1 hour until uniform, and discharge the material to obtain the waterproof coating of the present invention.

Embodiment 3

[0022] 1000 grams of polyoxypropylene ether diol, 400 grams of polyoxypropylene ether triol, 100 grams of plasticizer, control the temperature at 105-115°C, and dehydrate for 1-4 hours under the condition of vacuum degree of -0.08-0.1MPa, add 370 g of isophorone diisocyanate, 40 g of 1,4-butanediol, 50 g of acetone and dimethylolpropionic acid, 20 g of homemade diethanolamine diacetone propionamide and 1 g of dibutyltin dilaurate, continued Stir and keep warm at 80°C for 8 hours; after cooling down to below 50°C, add 100 grams of acetone and emulsify under water under high-speed stirring conditions; add 30 grams of isophorone diamine and continue stirring for 1 to 2 hours; heat up To 60°C, desolventize for 2 hours under the condition of vacuum degree of -0.08~0.1MPa; add 6g of adipic hydrazide at room temperature, stir for 1 hour until uniform, and discharge the material to obtain the waterproof coating of the present invention.

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Abstract

The invention discloses a self-crosslinked one-component polyurethane waterproofing coating composed of the components in parts by weight: 50-90 parts of polyol, 10-30 parts of isocyanate, 0-10 parts of a plasticizer, 0-5 parts of a hydrophilic chain extender, 0-10 parts of a small-molecular chain extender, 0-5 parts of a self-crosslinking modifier, 0-1 part of a catalyst and 0-5 parts of a solvent, wherein the self-crosslinking modifier contains hydroxyl or amino group, has a diacetone acrylamide structure and can be reacted with NCO. The self-crosslinked one-component polyurethane waterproofing coating disclosed by the invention is favorable in performance and capable of solving the problem of poor water resistance of a common waterborne coating.

Description

technical field [0001] The invention relates to the field of architectural coatings, in particular to an environment-friendly and highly water-resistant self-crosslinking polyurethane waterproof coating which can be applied on a damp base surface and uses water as a dispersion medium. Background technique [0002] Polyurethane waterproof coating is a new type of high-grade waterproof coating, which has the characteristics of excellent overall waterproof effect, high strength, good elasticity, strong adhesion, high and low temperature resistance, corrosion resistance, and easy construction, and is favored by domestic and foreign waterproofing circles. [0003] In the field of waterproof coatings, the current domestic one-component polyurethane waterproof coatings are mainly solvent-based. Most of the waterproof coatings contain some solvents, which pollute the environment when they volatilize, and most of the acrylic emulsion waterproof coatings have the problem of poor water...

Claims

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Application Information

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IPC IPC(8): C09D175/08C08G18/76C08G18/66C08G18/48
Inventor 冯林林李红英段文锋
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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