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Bi-component high-strength polyurethane waterproofing paint

A polyurethane waterproof, two-component technology, applied in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc. Coating use requirements and other issues, to achieve the effect of convenient construction and environmental protection

Active Publication Date: 2008-01-09
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing two-component polyurethane waterproof coatings have the following common disadvantages: 1. The tensile strength and tear strength are low, which cannot meet the requirements of high-end buildings and special projects for the use of polyurethane waterproof coatings; 2. The bonding strength is low , especially the bonding strength of the wet base surface and the bonding strength with concrete cannot meet the requirements for the use of waterproof materials in national key projects such as high-end buildings and high-speed railways; 3. Ordinary two-component polyurethane waterproof coatings contain organic solvents, The volatilization of organic solvents will be generated during construction, which will cause environmental pollution and harm to the human body
[0005] In order to meet the rapid development of infrastructure construction and municipal traffic engineering, especially the physical and mechanical properties of polyurethane waterproof materials, the fatigue life of chemical performance materials, and the bonding and Due to the higher and higher requirements for the bonding of the concrete on the protective layer above, the existing national standard GB / T19250-2003 "Polyurethane Waterproof Coating" standard polyurethane waterproof coating can no longer meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation process of component A is as follows: Add 200 parts of polyether glycol (propylene glycol polyoxypropylene ether), 150 parts of glycerin polyoxypropylene into a 500ml ground-mouthed three-necked bottle equipped with a stirrer, reflux condenser, and thermometer. Propylene ether, 2.5 parts of dibutyl phthalate, and 0.1 part of tartaric acid are slowly heated up to 120°C while stirring, and placed under a vacuum pressure of -0.098MPa for 2 hours. Lower the temperature below 60°C, add 55 parts of toluene-2,4-diisocyanate (TDI), control the temperature at 70°C, and dehydrate in vacuum for 2 hours under stirring. After the reaction is finished, lower the temperature to below 60°C and discharge the material, and fill with nitrogen to protect to obtain component A.

[0016] The preparation process of component B is as follows: add 50 parts of petroleum resin, 20 parts of chlorinated paraffin, 10 parts of dibutyl phthalate, and 60 parts of polyether trihydric alc...

Embodiment 2

[0018] The preparation process of component A is as follows: 120 parts of polyether diol (polyoxypropylene-refined castor oil diol), 40 parts of Polyether trihydric alcohol (glycerol polyoxypropylene ether), 1.5 parts of dibutyl phthalate, 0.5 parts of tartaric acid, slowly heated up to 110°C while stirring, and placed under vacuum pressure -0.098MPa for 2 hours. Lower the temperature below 60°C, add 47 parts of toluene-2,4-diisocyanate (TDI), control the temperature at 80°C, and conduct vacuum dehydration reaction for 3 hours under stirring. Nitrogen protection is used to protect the discharge to obtain component A.

[0019] The preparation process of component B is as follows: add 60 parts of petroleum resin, 50 parts of chlorinated paraffin, 20 parts of dibutyl phthalate, and 360 parts of polyether trihydric alcohol (GEP-330N) tube and a thermometer with a 500ml ground-necked three-necked bottle, after slowly raising the temperature to 120°C, slowly add 45 parts of 3,3-dic...

Embodiment 3

[0021] The preparation process of component A is as follows: 150 parts of polyether diol (polybutadiene diol), 3 parts of phthalic acid Dibutyl ester, 180 parts of polyoxypropylene-refined castor oil trihydric alcohol, and 1 part of tartaric acid are slowly heated to 130° C. under stirring, and placed under a vacuum pressure of -0.098 MPa for 2 hours. Lower the temperature below 60°C, add 80 parts of toluene-2,4-diisocyanate (TDI), control the temperature at 90°C, and vacuum dehydration reaction for 3h under stirring. After the reaction is finished, the temperature is lowered to below 60°C, and then the material is discharged, and the A component is obtained for protection with nitrogen protection.

[0022] The preparation process of component B is as follows: add 90 parts of petroleum resin, 30 parts of chlorinated paraffin, 30 parts of dibutyl phthalate, 200 parts of polyether triol (GEP-330N), and dispersant (FA196) into the container In a 500ml ground three-neck flask wit...

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Abstract

A dual-component high-strength polyurethane water proof coating contains A and B components; A component consists of polyether dibasic alcohol 120-200 proportion, polyether trivalent alcohol 40-180 proportion, toluene diisocyanate 47-80 proportion, dibutyl ester 1.5-3 proportion, and tartaric acid 0.1-1 proportion. B component consists of filling oil 50-90 proportion, paraffin chloride 20-50 proportion, dibutyl ester 10-30 proportion, 3,3-dichloro-4,4-diphenyl-methane-diamine 45-70 proportion, poly-ether trivalent alcohol 60-360 proportion, hydrated magnesium silicate 50-60 proportion, kaolin 10-50 proportion, heavy calcium carbonate 50-60 proportion, iron oxide brown or carbon black 3.5-4.5 proportion, de-foaming agent 0.2-0.5 proportion, and dibutyltin dilaurate 0.2-0.5 proportion. It's convenient and cheap, has excellent adhesion, strength and extensibility and more solid content and no environmental pollution. It can be used for foundation construction and municipal traffic engineering.

Description

technical field [0001] The invention relates to a polyurethane waterproof coating, in particular to a two-component high-strength polyurethane waterproof coating. Background technique [0002] Polyurethane coating is a new type of material developed in the late 20th century. It has many excellent properties such as wear resistance, oil resistance, acid and alkali resistance, water resistance, chemical medicine and wide construction range, and is one of the coating varieties with better comprehensive properties at present. In the 1970s, it has entered my country's waterproof material market, and has been widely used in roofing, underground engineering, and kitchen and bathroom, and has achieved good waterproof effects. [0003] Polyurethane waterproof coatings include two types of single-component polyurethane waterproof coatings and multi-component polyurethane waterproof coatings. According to the composition and curing mechanism of the coating film, polyurethane coatings ...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D5/16
Inventor 李卫国许利民田凤兰
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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