Preparation method of environment-friendly one-component moisture curing polyurethane waterproofing paint

A polyurethane waterproof, one-component technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of high cost and poor mechanical properties, and achieve the effect of low cost, high safety and excellent water resistance

Active Publication Date: 2015-11-11
青岛中科润唐新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a one-component solvent-free polyurethane waterproof coating with high mechanical strength, good water resistance, and excellent adhesion to the base, so as to solve the problems of poor mechanical properties and high cost of existing polyurethane waterproof coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 20g polypropylene glycol (Mn=1000), 2g polyoxypropylene glycerol ether (Mn=10000) to the reaction flask, vacuum dehydration at 120°C for 2h, cool to 50°C, add 7.1g toluene diisocyanate, react at 50°C for 1h, To room temperature, add 0.66g of didecyl catechol formate, 0.11g of silicone defoamer, and 0.022g of tetra(β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid)pentaerythritol , 2-hydroxy-4-methoxybenzophenone 0.022g. Stir for 10 minutes, discharge the material, and store in a sealed container.

Embodiment 2

[0024] Add 20g polypropylene glycol (Mn=10000), 10g polyoxypropylene glycerol ether (Mn=1000) to the reaction flask, vacuum dehydration at 120°C for 2h, cool to 50°C, add 11.8g toluene diisocyanate, react at 80°C for 4h, To room temperature, add 2.4 g of didecyl catechol formate, 0.3 g of silicone defoamer, and 0.3 g of tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid) pentaerythritol , 2-Hydroxy-4-methoxybenzophenone 0.3g. Stir for 10 minutes, discharge the material, and store in a sealed container.

Embodiment 3

[0026] Add 20g polypropylene glycol (Mn=6000), 4g polyoxypropylene glycerol ether (Mn=6000) to the reaction flask, vacuum dehydration at 120°C for 2h, cool to 60°C, add 2.3g of toluene diisocyanate, and react at 60°C for 3h. To room temperature, add 1.2g dinonyl catechol formate, 0.16g silicone defoamer, 0.12g tetra(β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid) pentaerythritol , 2-hydroxy-4-methoxybenzophenone 0.12g. Stir for 10 minutes, discharge the material, and store in a sealed container.

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PUM

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Abstract

The invention relates to a preparation method of environment-friendly one-component moisture curing polyurethane waterproofing paint. The preparation method is mainly characterized by comprising the following steps: adding RDEA of poly-functionality polyether glycol and polyglycol, dehydrating, adding isocyanate for reaction for 1-4 h at 50-80 DEG C, reducing to room temperature, adding a plasticizer, an antifoaming agent, an antioxidant and an ultraviolet light absorber that are pre-dried, uniformly mixing to obtain the polyurethane waterproofing paint. The environment-friendly one-component moisture curing polyurethane waterproofing paint has the advantages as follows: 1), the raw materials are low in cost and easy to obtain, the synthetic method is simple, convenient, efficient and low in cost, the scale-up of the operation processes and the industrial production are facilitated; 2), water is taken as a curing agent for polyurethane resin, therefore the polyurethane resin after curing in air with certain humidity can form a compact polyurethane elastomer coating which is high in safety; besides, poly-functionality active group is introduced and can form a compact cross-linked network after curing, with an excellent mechanical property (the film tensile strength is greater than 6 MPa, and the breaking elongation is greater than 1000%), the polyurethane waterproofing paint can serve as an excellent waterproofing material and is broad in application prospect.

Description

Technical field [0001] The invention relates to a preparation method of an environment-friendly waterproof coating used in the field of construction industry, in particular to a preparation method of a single-component moisture-curing polyurethane waterproof coating with high tensile strength and high elongation at break. Background technique [0002] The surface waterproofing of building concrete can effectively protect the building from water erosion and extend the service life of the building. Building waterproofing is very important. Among the many commercialized waterproof coatings, polyurethane waterproof coatings have elasticity, good extensibility, high tensile strength, good adhesion, small volume shrinkage, no joints in the waterproof layer of the coating film, and elasticity to the cracks of the base The deformation has strong adaptability, convenient construction and maintenance (the polyurethane waterproof coating is an amorphous viscous liquid substance before curi...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C08G18/48
Inventor 万晓波穆有炳
Owner 青岛中科润唐新材料科技有限公司
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