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Two-component polyurethane adhesive and preparation method thereof

A two-component polyurethane and adhesive technology, used in polyurea/polyurethane adhesives, adhesives, ester copolymer adhesives, etc., can solve the problems of poor strength and poor water resistance, and achieve good wear resistance and adhesion. High strength and good chemical resistance

Inactive Publication Date: 2019-11-22
无锡庄周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

[0003] Aiming at the deficiencies in the prior art, the invention provides a two-component polyurethane adhesive and its preparation method, which solves the problems of poor water resistance and poor strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Material selection

[0053] 1. Two-component polyurethane adhesive components A and B;

[0054] 2. 4~6mm stones washed and dried with water;

[0055] 3. Make a wooden frame of 30cm×40cm×5cm with wooden strips, three sets;

[0056] 4. The outdoor temperature is 25°C (±2°C).

[0057] Test one:

[0058] 1. Use component A: component B = 1:1 and stir evenly for 2 minutes;

[0059] 2. Add stones with 15 times the amount of two-component glue, and stir well;

[0060] 3. Then put it into the wooden frame, press and flatten it tightly, and the surface dry time is 2 hours.

Embodiment 2

[0087] 1. Select the ratio of component A in test 1: component B = 1:1 to carry out the following test (outdoor temperature 25±2°C);

[0088] 2. Stone selection: 4~6mm, 8~10mm, 10~20mm, dry the stone after washing;

[0089] 3. Make 150mm×150mm×150mm cubic wooden frames (three);

[0090] 4. Mix component A: component B = 1:1 and stir evenly for 2 minutes (the mixing ratio of stones is 4-6mm, 1 part, 8-10mm is 2 parts, 10-20mm is 3 parts). The weight of stones is the weight of glue. 25 times, stir evenly;

[0091] 5. Put the evenly mixed adhesive stones into the wooden frame (the four sides of the inner side of the wooden frame are pasted with kraft paper to prevent the glue from sticking to the wooden board), compact and flatten to make three test blocks;

[0092] 6. Store for 15 days;

[0093] 7. Carry out a pressure test according to the strength test method of the concrete test block, and the test result reaches the concrete strength of C20.

[0094] Refer to the concret...

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Abstract

The invention discloses a two-component polyurethane adhesive which is formed by mixing a component A and a component B. The component A is a polyurethane prepolymer, the component B is a mixture of acrylic resin and polyether polyol, and the ratio of the component A to the component B is 1: 1. The mixing ratio of the component A to the component B is optimized; therefore, the prepared two-component polyurethane adhesive is high in bonding strength; the surface drying time of the two-component polyurethane adhesive is relatively suitable for construction operation; during construction of engineering, the construction in a relatively constant state can be maintained; the normal construction period of a project is not influenced; the engineering construction period cannot be prolonged; meanwhile, the prepared adhesive stone is high in strength, meets the test standard of concrete C20 and is good in water resistance test, the adhesive stone prepared from the two-component polyurethane adhesive is resistant to aging and high in hardness, the water permeability reaches 35% or above, the water permeation effect is improved, and the stability of the adhesive stone used in rainy days is improved.

Description

technical field [0001] The invention relates to the technical field of preparing polyurethane adhesives, in particular to a two-component polyurethane adhesive and a preparation method thereof. Background technique [0002] Since my country promoted the establishment of ecological sponge cities, there are two construction methods in the field of sponge city permeable pavement: one is to use cement plus cement enhancer and graded stones, and directly mix and mix it on the pavement to make concrete permeable pavement. After the cement is added with a reinforcing agent, the brittleness will become larger, and the bonding strength will be poor, and the permeable pavement after construction will often have the phenomenon of falling stones; the second is: use epoxy resin adhesive or polyurethane adhesive, mix and mix with stones to pave the permeable pavement, Adhesive stone permeable pavement mixed with adhesives and stones has high water permeability; most of the market is made of...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J133/04C08G18/40C08G18/48C08G18/61C08G18/62
CPCC08G18/4063C08G18/4816C08G18/61C08G18/6229C09J175/08C08L33/04
Inventor 张志平
Owner 无锡庄周新材料科技有限公司
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