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 of easy foaming, affecting the mechanical properties of polyurethane composite concrete materials, troublesome operation, etc., achieve strong permeability, facilitate large-scale application and on-site construction, The effect of sufficient operating time

Active Publication Date: 2020-03-27
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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
  • 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 normal temperature;

[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 modified c...

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Abstract

The invention belongs to the technical field of polyurethane elastomers and particularly relates to a two-component polyurethane composition for concrete modification and a preparation method thereof.The double-component polyurethane composition for concrete modification is prepared from a component A and a component B. The component A is formed by polymerizing the following raw materials in parts by mass: 5-20 parts of polyether polyol 1 and 80-100 parts of isocyanate. The component B is prepared from the following raw materials in parts by mass: 40 to 80 parts of polyether polyol 2, 20 to 60 parts of a viscosity reducer, 0.5 to 5 parts of a modification auxiliary agent and 0.1 to 0.5 part of a catalyst. The mixing mass ratio of the component A to the component B is 1: (1-4). The two-component polyurethane composition for concrete modification has the advantages of low viscosity, high permeability, hydrolysis resistance, controllable operation time, high strength and easy construction and operation, concrete materials are modified, and the mechanical properties of the concrete materials are improved. The invention also provides a preparation method of the composition.

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 Applications(China)
IPC IPC(8): C04B24/42C08G18/66C08G18/48C08G18/36
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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