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A self-crosslinking type one-component polyurethane waterproof coating

A waterproof coating and self-crosslinking technology, which is applied in the field of architectural coatings, 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: 2017-04-19
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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  • A self-crosslinking type one-component polyurethane waterproof coating

Examples

Experimental program
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Effect test

Embodiment 1

[0018] 1000 grams of polyoxypropylene ether glycol, 400 grams of polyoxypropylene ether triol, 100 grams of plasticizer, control the temperature at 105~115℃, and the vacuum degree of dehydration for 1-4 hours under the condition of -0.08~0.1MPa, add 290 grams of toluene 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, at 80°C Incubate and react for 8 hours after cooling down; add 100 grams of acetone and emulsify under water under high-speed stirring conditions when the temperature is below 50°C; add 30 grams of isophorone diamine and continue stirring for 1 to 2 hours; increase the temperature to 60°C, The solvent is removed for 2 hours under the condition of vacuum degree of -0.08~0.1MPa; 6g adipic acid hydrazide is added at normal temperature, stirred for 1 hour until uniform, and the waterproof coating of the present invention is obt...

Embodiment 2

[0020] 1000 grams of polyoxypropylene ether glycol, 400 grams of polyoxypropylene ether triol, 100 grams of plasticizer, control the temperature at 105~115℃, and the vacuum degree of dehydration for 1-4 hours under the condition 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, Incubate the reaction 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 to stir for 1 to 2 hours; increase the temperature to 60 ℃, the solvent is removed for 2 hours under the condition of vacuum degree of -0.08~0.1MPa; 6g adipic acid hydrazide is added at normal temperature, stirred for 1 hour until uniform, and the waterproof coating of the present invention is obtained afte...

Embodiment 3

[0022] 1000 grams of polyoxypropylene ether glycol, 400 grams of polyoxypropylene ether triol, 100 grams of plasticizer, control the temperature at 105~115℃, and the vacuum degree of dehydration for 1-4 hours under the condition of -0.08~0.1MPa, add 370 grams of isophorone diisocyanate, 40 grams of 1,4-butanediol, 50 grams of acetone and dimethylolpropionic acid, 20 grams of homemade diethanolamine diacetone propionamide and 1 gram of dibutyl tin dilaurate, continue Stir, keep the temperature at 80℃ for 8 hours; after cooling down to below 50℃, add 100 grams of acetone and emulsify under water under high-speed stirring; add 30 grams of isophorone diamine and continue stirring for 1 to 2 hours; To 60°C, the solvent is removed for 2 hours under the condition of a vacuum degree of -0.08~0.1MPa; 6g adipic acid hydrazide is added at normal temperature, and the mixture is stirred for 1 hour until uniform, and the waterproof coating of the present invention is obtained after dischargin...

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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 environmentally-friendly high-water-resistant self-crosslinking polyurethane waterproof coating that can be constructed on a wet base surface and uses water as a dispersion medium. Background technique [0002] Polyurethane waterproof coating is a new type of high-grade waterproof coating. It has excellent overall waterproof effect, high strength, good elasticity, strong adhesion, high and low temperature resistance, corrosion resistance, and simple construction. It is favored by the waterproof community at home and abroad. [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 evaporate, and most acrylic emulsion-type waterproof coatings have the problem of poor water resistance, and at the same time,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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