Preparation method of single-component polyurethane waterproofing paint

A polyurethane waterproof, one-component technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve environmental and human health hazards, carcinogenic and other problems, and achieve excellent waterproof performance, excellent mechanical properties and chemical properties.

Active Publication Date: 2019-03-22
山西四方九瑞防水技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the most commonly used curing agent for polyether polyurethane waterproof coatings, MOCA has the risk of carcinogenicity and is very harmful to the environment and human health.

Method used

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  • Preparation method of single-component polyurethane waterproofing paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 88g of polyether diol, 30g of polyether triol, and 90g of plasticizer, add them to a three-necked flask, raise the temperature to 70°C, add 15g of porous microbead carrier getter (ceramic porous microbeads—adsorption auxiliary agent— Calcium oxide), 83g talcum powder and 20g kaolin, heat up to 105°C-125°C for vacuum dehydration for 3h, cool down to 40-50°C, add 8.6 toluene diisocyanate, slowly heat up, control the temperature at 75-83°C, react for 2h, cool down When the temperature is below 70°C, add a catalyst, a leveling agent, an anti-aging agent, and a defoamer, stir for 30 minutes, and discharge to obtain the waterproof coating of the present invention.

Embodiment 2

[0025] Take 88g of polyether diol, 30g of polyether triol, and 90g of plasticizer, add them to a three-necked flask, raise the temperature to 70°C, add 15g of porous microbead carrier getter (ceramic porous microbeads—adsorption auxiliary agent— Calcium Oxide - Magnesium Oxide). 83g talcum powder and 20g kaolin, heat up to 105°C-125°C for vacuum dehydration for 3 hours, cool down to 40-50°C, add 8.6 toluene diisocyanate, slowly heat up, control the temperature at 75-83°C, react for 2h, cool down to below 70°C , add catalyst, leveling agent, anti-aging agent, defoamer, stir for 30 minutes, and discharge to obtain the waterproof coating of the present invention.

Embodiment 3

[0027] Take 88g of polyether diol, 30g of polyether triol, and 90g of plasticizer, add them to a three-necked flask, raise the temperature to 70°C, add 15g of porous microbead carrier getter (ceramic porous microbeads—adsorption auxiliary agent— Magnesium oxide), 83g talcum powder and 20g kaolin, heat up to 105°C-125°C for vacuum dehydration for 3h, cool down to 40-50°C, add 8.6 toluene diisocyanate, slowly heat up, control the temperature at 75-83°C, and react for 2h, Cool down to below 70°C, add catalyst, leveling agent, anti-aging agent, defoamer, stir for 30 minutes, and discharge to obtain the waterproof coating of the present invention.

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Abstract

The invention discloses a preparation method of single-component polyurethane waterproofing paint. The preparation method comprises the following steps: 1) mixing polyether polyol and a porous microbead carrier getter, heating the mixture, dehydrating the mixture in vacuum, and making the mixture react with isocyanate to generate a prepolymer of which the end group is -NCO, wherein the weight ratio of the polyether polyol to the isocyanate is (3 to 8) to 1; 2) adding the prepolymer prepared in the step 1) into a catalyst, and performing a polymerization reaction to obtain the single-componentpolyurethane waterproof paint. The paint prepared with the method is free from MOCA, tar oil, solvents and heavy metals, is odorless after curing, is environmentally friendly and nontoxic, and has superior mechanical performance, chemical performance and superior waterproofing performance. The product conforms to the limit of harmful substance in GB / T19250-2013, and can be constructed on wet substrates.

Description

[0001] The invention belongs to the technical field of chemical industry, and in particular relates to a one-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Polyurethane waterproof coating is a new type of waterproof coating, which has excellent water resistance, high elasticity, strong adhesion, high and low temperature resistance, acid and alkali corrosion resistance, and is widely used in the field of building waterproofing. [0003] Polyurethane coatings were first promoted and applied in Europe, America, Japan and other countries. In the 1970s, with the advancement of science and technology and the development of the chemical building materials industry in China, polyurethane waterproof coatings also developed. Theoretical research on polyurethane waterproof coating. After the 1990s, polyurethane waterproof coatings have achieved rapid development. After 20 years of practice, my country has gradually formed a serie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/61C08G18/48C08G18/76
CPCC08G18/4812C08G18/7614C08K3/34C08K3/346C08K7/24C08K13/04C08K2003/2206C08K2003/222C09D175/08
Inventor 赵宝生赵永生王大伟
Owner 山西四方九瑞防水技术有限公司
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