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Two-component polyurethane composition for concrete modification and preparation method thereof

A two-component polyurethane and concrete technology, applied in the field of polyurethane elastomers, can solve the problems affecting the mechanical properties of polyurethane composite concrete materials, troublesome operation, easy foaming, etc., to achieve improved mechanical and mechanical properties, low cost, and strong permeability Effect

Active Publication Date: 2021-08-06
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above patents all use single-component polyurethane, and the polyurethane composite concrete needs to mix all the raw materials on site when it is used, and the operation is more troublesome; and its polyols are all conventional diols, which are easy to foam during the curing process , affecting the mechanical properties of the final polyurethane composite concrete material

Method used

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  • Two-component polyurethane composition for concrete modification and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Prepare and use the two-component polyurethane composition for concrete modification as follows:

[0036] (1) Component A: Dehydrate 10kg of polyether polyol PPG1000 at a temperature of 100°C and a vacuum of -0.095MPa until the water content is less than 0.05wt%, then add 150kg of PM200, and carry out a polymerization reaction at 80°C for 3 hours to obtain iso The prepolymer with a mass content of cyanate group of 28wt% is sealed and stored after vacuumizing and defoaming, which is the A component;

[0037] (2) Component B: obtained by mixing 40kg of modified soybean oil polyol, 60kg988SG, 2.5kg of KH560 and 0.3kg of tetramethylbutylene diamine catalyst at room temperature;

[0038] (3) Use: Mix component B and component A at a temperature of 30°C in a mass ratio of 100:50 to obtain a polyurethane composition, and then add concrete materials 5 times the total mass of the polyurethane composition (among which the amount of sand and cement The ratio is 1:1) to obtain the...

Embodiment 2

[0040] Prepare and use the two-component polyurethane composition for concrete modification as follows:

[0041] (1) Component A: Dehydrate 10kg of polyether polyol PPG305 at a temperature of 105°C and a vacuum of -0.095MPa until the water content is less than 0.05wt%, then add 100kg of MDI-50, and carry out a polymerization reaction at 75°C for 4 hours. Obtain a prepolymer with an isocyanate mass content of 28wt%, and store it in a sealed manner after vacuuming and defoaming, which is the B component;

[0042] (2) Component B: obtained by mixing 60kg of modified soybean oil polyol, 40kg of butyl benzyl phthalate, 1.5kg of KH560 and 0.3kg of zinc diethylhexanoate catalyst at room temperature;

[0043] (3) Use: Mix component B and component A at a temperature of 30°C in a mass ratio of 100:50 to obtain a polyurethane composition, and then add concrete materials 10 times the total mass of the polyurethane composition (wherein the amount of sand and cement The ratio is 1:1) to o...

Embodiment 3

[0045] Prepare and use the two-component polyurethane composition for concrete modification as follows:

[0046] (1) Component A: Dehydrate 10kg of polyether polyol PPG1000 at a temperature of 105°C and a vacuum of -0.095MPa until the water content is less than 0.05wt%, then add 40kg of MDI-50, and carry out polymerization at 75°C for 4 hours , to obtain a prepolymer with an isocyanate mass content of 25wt%, which is sealed and preserved after vacuumizing and degassing, which is the B component;

[0047] (2) Component B: 50kg modified castor oil polyol, 50kg dioctyl terephthalate, 3.0kg KH550 and 0.3kg zinc diethylhexanoate catalyst were mixed at room temperature to obtain;

[0048](3) Use: Mix component B and component A at a temperature of 30°C in a mass ratio of 100:70 to obtain a polyurethane composition, and then mix in concrete materials 13 times the total mass of the polyurethane composition (the amount of sand and cement The ratio is 1:1) to obtain the polyurethane mo...

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Abstract

The invention belongs to the technical field of polyurethane elastomers, and in particular relates to a two-component polyurethane composition for concrete modification and a preparation method thereof. The two-component polyurethane composition for concrete modification is composed of component A and component B; component A is polymerized from the following raw materials in parts by mass: 5-20 parts of polyether polyol 1,80- 100 parts of isocyanate; B component consists of the following raw materials in parts by mass: 40-80 parts of polyether polyol 2, 20-60 parts of viscosity reducer, 0.5-5 parts of modification assistant, 0.1-0.5 parts of catalyst; A The mixing mass ratio of component and B component is 1:1‑4. The two-component polyurethane composition for concrete modification of the present invention has the advantages of low viscosity, strong permeability, hydrolysis resistance, controllable operating time, high strength, and easy construction and operation. It can modify concrete materials and improve the quality of concrete materials. Mechanical and mechanical properties; the present invention should provide its preparation method.

Description

technical field [0001] The invention belongs to the technical field of polyurethane elastomers, and in particular relates to a two-component polyurethane composition for concrete modification and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of urbanization and rural areas in my country, the use of concrete materials has increased sharply, but there are some defects caused by wear, chemical corrosion, steel corrosion and other reasons in the process of use. If repairs are not timely, it is easy to cause larger areas. At the same time, it will also face huge economic and loss of life and property. [0003] The existing modified repair concrete includes polymer impregnated concrete, polymer cement concrete, polymer cemented concrete, etc. Among them, the impregnated concrete has the problem of poor heat resistance, and the concrete with polymer as the cementing material has toughness and high strength. However, polymer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/48C04B24/42C08G18/66C08G18/36
CPCC04B40/0039C08G18/36C08G18/48C08G18/6696C04B24/282C04B24/32C04B24/045C04B24/42C04B24/121C04B24/40
Inventor 宋书征刘兆阳王维龙曹士强
Owner SHANDONG INOV POLYURETHANE
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