Bi-component slow-reaction polyurea and preparation method thereof

A two-component, polyurea technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of difficult quality assurance and high construction costs, and achieve the effects of slow reaction speed, cost reduction, and good wetting ability.

Active Publication Date: 2012-09-19
北京市大禹王防水工程集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3. Spray polyurea coating for local damaged parts, pull-out test points, pinholes and other special parts left over from the construction process, as well as small sites that need to be constructed, etc., using spray polyurea to repair and construct high cost and high quality also difficult to guarantee

Method used

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  • Bi-component slow-reaction polyurea and preparation method thereof
  • Bi-component slow-reaction polyurea and preparation method thereof
  • Bi-component slow-reaction polyurea and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1, the embodiment of TDI system:

[0071] When the NCO value is 6.0%, the specific formula is shown in the table below:

[0072] Component A

[0073]

[0074] Component B

[0075]

[0076] *The ratio of this recipe is A:B=2:1

[0077] Synthesis process of component A: Take TDI, add N-220 at room temperature, raise the temperature to 80°C, react in this temperature range for 3 hours, check the NCO value, and discharge the material after passing the test.

[0078] Synthesis process of component B: Take DesmophenNH1420 and Unilink4200 and add black slurry ground by carbon black, dispersant and additives, then add white slurry ground by titanium dioxide, dispersant and additives, stir and disperse for 30 minutes, and make each The components are evenly dispersed and discharged.

[0079] The polyurea is obtained by mixing the two components A and B.

Embodiment 2

[0080] Embodiment 2MDI system

[0081] When the NCO value is 6.0%, the specific formula is shown in the table below:

[0082] Component A

[0083]

[0084] Component B

[0085]

[0086] *The ratio of this recipe is A:B=2:1

[0087] Synthesis process of component A: Take MDI, add N-220 at room temperature, raise the temperature to 80°C, react in this temperature range for 3 hours, check the NCO value, and discharge the material after passing the test.

[0088] Synthesis process of component B: Take DesmophenNH1420 and Unilink4200 and add black slurry ground by carbon black, dispersant and additives, then add white slurry ground by titanium dioxide, dispersant and additives, stir and disperse for 30 minutes, and make each The components are evenly dispersed and discharged.

[0089] The polyurea is obtained by mixing the two components A and B.

Embodiment 3

[0090] Embodiment 3PAPI system

[0091] When the NCO value is 6.0%, the specific formula is shown in the table below:

[0092] Component A

[0093]

[0094] Component B

[0095]

[0096] *The ratio of this recipe is A:B=2:1

[0097] Synthesis process of component A: Take PAPI, add N-220 at room temperature, raise the temperature to 80°C, react in this temperature range for 3 hours, check the NCO value, and discharge the material after passing the test.

[0098] Synthesis process of component B: Take DesmophenNH1420 and Unilink4200 and add black slurry ground by carbon black, dispersant and additives, then add white slurry ground by titanium dioxide, dispersant and additives, stir and disperse for 30 minutes, and make each The components are evenly dispersed and discharged.

[0099] During construction, mix A and B components to obtain polyurea.

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Abstract

The invention discloses a bi-component slow-reaction polyurea and a preparation method thereof. Isocyanate prepolymer and annular sterically hindered amine are used for preparing the bi-component slow-reaction polyurea, a component A is preferably made of TDI (toluene 2,4-diisocyanate) and N-220, chain extender in a component B is made of annular sterically hindered amine mixture and filler, and the annular sterically hindered amine is mainly prepared by combining aliphatics and aromatics. The bi-component slow-reaction polyurea is excellent in tensile strength, tear strength, breaking elongation, low-temperature bendability, shock resistance, flexibility and bonding strength and peel strength with base materials, and further has the advantages of fine operable time and coating performance. Further, the bi-component slow-reaction polyurea is fine in infiltration performance, low in internal stress of coatings, high in adhesive force, accordant with the environment protection requirements, suitable for small-field construction and low in cost, can be used as a lapping material, and can be also used for repairing spray polyurea coatings.

Description

technical field [0001] The invention belongs to the field of polyurethane waterproof coatings, in particular to a two-component polyurea and a preparation method thereof. Background technique [0002] Spraying polyurea elastomer as a new type of green and environmentally friendly protective coating with the advantages of low VOC (volatile organic compound) content, fast curing speed, and high film thickness at one time. The successful application of it has gradually been understood by people and accepted by the market, especially the official release of the national standard "Spray Polyurea Waterproof Coatings" on May 25, 2009, creating a new foundation for the further promotion and application of polyurea materials. better conditions. However, the current spray polyurea elastomer technology has the following shortcomings and deficiencies: [0003] 1. Because the reaction speed of polyurea is too fast, the wetting ability to the base surface is poor, and the adhesion to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/60C08G18/48C08G18/32C08K13/02C08K3/22C08K3/04C09D175/02C09D5/00
Inventor 张志功史立彤周万成
Owner 北京市大禹王防水工程集团有限公司
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