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High-performance environment-friendly type polyurethane waterproofing paint and preparation technique thereof

A polyurethane waterproof and environment-friendly technology, applied in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve problems such as low elongation, difficult operation, and difficult storage

Inactive Publication Date: 2008-07-30
苏州中材非金属矿工业设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On April 5, 2007, the Department of Science and Technology of the Ministry of Railways issued an opinion on passenger dedicated lines, especially high-speed passenger lines, based on the application of foreign high-speed railway bridge waterproof layers, the latest test and research results, and the opinions reflected by the current construction units in the construction of waterproof layers. The polyurethane waterproof coating on the special line puts forward higher requirements, requiring its strength not less than 6.0MPa, and the elongation at break must be above 450%, but most of the polyurethane waterproof coatings on the market today are difficult to meet this requirement
Although MDI is used to partially replace TDI, the elongation of the obtained product is too low (only 200-400%), which cannot meet the requirements of the currently implemented polyurethane coating standard (GB / T19250-2003)
[0006] In addition, pure MDI also has many problems in the process of production and use. For example, it is solid at room temperature and needs to be heated and melted during construction; As far as the current technical level is concerned, it is difficult for pure MDI to completely replace TDI as the raw material for the production of polyurethane waterproof coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of component A: Put 70 parts of polyether polyol (hydroxyl value 56KOHmg / g) into the reactor and start stirring while raising the temperature to 110±5°C, and dehydrate it under the vacuum pressure of -0.09MPa for 2 hours, and fill it with After nitrogen protection, lower the temperature to 55°C, add 29.7 parts of carbamate-modified liquefied MDI and 0.3 part of tartaric acid, stir for 30 minutes, then continue to heat up, and react at 80±2°C for another 2 hours, and finally cool and discharge for packaging ;

[0028] Preparation of component B: Add 30 parts of petroleum resin and 20 parts of castor oil into the reactor, heat up to 110±5°C, add 4 parts of MOCA and 11 parts of polyether polyol (hydroxyl value 36.5KOHmg / g), stir After 0.5h until MOCA is completely dissolved, add 30 parts of inorganic powder, 0.5 parts of defoamer, 3 parts of antioxidant 2,6-di-tert-butyl-4-methylphenol, 1.5 parts of UV absorber 2-hydroxy-4 -Octyloxybenzophenone, continue to st...

Embodiment 2

[0031] Preparation of component A: Put 65 parts of polyether polyol (hydroxyl value 56.1KOHmg / g) into the reactor and start stirring while raising the temperature to 110±5°C, dehydrate under the vacuum pressure of -0.09MPa for 1h, fill in After nitrogen protection, lower the temperature to 55°C, add 34.7 parts of carbodiimide and uretonimine modified liquefied MDI and 0.3 part of triphenyl phosphate, stir for 30 minutes, then continue to heat up to 80±2°C for 3 hours, and finally Cooling discharge packaging;

[0032]Preparation of component B: Add 20 parts of polyether polyol (hydroxyl value 114.2KOHmg / g) and 25 parts of coumarone into the reactor, raise the temperature to 110±5°C, add 4 parts of MOCA and 11 parts of polyether polyol Alcohol (hydroxyl value 36.5KOHmg / g), stir for 0.5h until MOCA is completely dissolved, add 35 parts of flake inorganic powder, 1 part of defoamer, 2 parts of antioxidant tetrakis[β-(3,5-di-tert-butyl Base-4-hydroxyphenyl)propionic acid]pentaeryt...

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PUM

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Abstract

The invention relates to a high-performance environment-friendly polyurethane waterproofing paint and the preparing process, in particular to a polyurethane waterproofing paint applied to passenger transport railway line. The paint is prepared by mixing constituent A and constituent B by a certain ratio. The constituent A includes polyether polyols, the weight proportion of which is 64.5-74.5 percent; modifying liquefied methane diphenyl diisocyanate, the weight proportion of which is 25-35 percent; storage stabilizer, the weight proportion of which is 0.1-1 percent. The constituent B includes liquid filling, the weight proportion of which is 45-55percent; inorganic powder filling, the weight proportion of which is 30-40 percent; firming agent, the weight proportion of which is 10-20 percent. The paint of the invention uses the modifying liquefied MDI as the material of the constituent A, ensures the production process to be more environment-friendly, ensures the operation to be more simple, and can save more cost, can meet the indexes of high strength and high percentage elongation as the paints is obtained.

Description

technical field [0001] The invention relates to a polyurethane waterproof coating and a preparation process thereof, more specifically, the invention relates to a polyurethane waterproof coating applied in the field of construction, especially on passenger dedicated lines. Background technique [0002] With the increase of my country's infrastructure construction, a large number of constructions such as railways, highways, and urban subways, the amount of waterproofing projects is huge. In these construction projects, polyurethane waterproof coating is the most commonly used waterproof coating. [0003] On April 5, 2007, the Department of Science and Technology of the Ministry of Railways issued an opinion on passenger dedicated lines, especially high-speed passenger lines, based on the application of foreign high-speed railway bridge waterproof layers, the latest test and research results, and the opinions reflected by the current construction units in the construction of w...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D5/16
Inventor 沈春林储建军康杰分王玉峰杨柄元杨军
Owner 苏州中材非金属矿工业设计研究院有限公司
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