Rapidly cured rigid polyurea with high adhesion and preparation method of rapidly cured rigid polyurea

A high-adhesion, fast-curing technology, used in polyurea/polyurethane coatings, coatings, etc., can solve problems such as difficulty in adapting to working conditions, uneven adhesion, and few applications, shortening gel time, The effect of increasing the crosslinking density and broadening the application field

Inactive Publication Date: 2016-04-20
大连怿文新材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its adhesion is uneven and its cost is high, so it is not widely used in some fields
The gel time of polyurea used in steel structures is as long as 20s, the adhesion is only 10MPa, and the cathodic disbondment radius is only 10mm. It is difficult to adapt to the increasingly complex working environment. Urea

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0031] A fast-curing high-adhesion rigid polyurea is a two-component component, and the mass percentages of the raw materials of component A and component B are as follows:

[0032] Preparation of component A: Add 30 parts of polytetrahydrofuran polyol PTMEG1000 into the reaction kettle, 110~120°C, vacuum -0.08~-0.1MPa, stir and dehydrate for 2~3 hours, remove the vacuum and cool down to below 60°C, add 63 parts of For MDI-100, heat to 80-90°C and keep it warm for 2-3 hours, then add 7 parts of coupling agent KH560 after cooling, stir and discharge evenly.

[0033] Preparation of component B: 30 parts of DETDA, 45 parts of polytetrahydrofuran polyol PTMEG1000, 15 parts of dehydrated castor oil, 0.3 parts of dibutyltin dilaurate, 1 part of antioxidant 1010, 1 part of UV-531, 1 part of wetting Add dispersant BYK104S, 1.2 parts of leveling agent BYK203, 1 part of titanium dioxide, and 4.5 parts of dewatering agent 3A activation powder into the tank, disperse at high speed for 0.5...

specific Embodiment 2

[0037] A fast-curing high-adhesion rigid polyurea is a two-component component, and the mass percentages of the raw materials of component A and component B are as follows:

[0038] Preparation of component A: Add 40 parts of polyoxypropylene glycol PPG2000 into the reaction kettle, 110~120°C, vacuum -0.08~-0.1MPa, stir and dehydrate for 2~3 hours, remove the vacuum and cool down to below 60°C, add 35 1 part of MDI-50, 25 parts of polyphenylmethane polyisocyanate PAPI, heated to 80-90 ℃ and kept for 2-3 hours, then cooling and adding 5 parts of coupling agent KH560, stirring evenly and discharging. Preparation of component B: 30 parts of DETDA, 35 parts of polytetrahydrofuran polyol PTMEG1000, 25 parts of polyethylene glycol, 0.3 part of dibutyltin dilaurate, 1 part of antioxidant 1010, 1 part of UV-531, 1 part of moisturizing Wet dispersant BYK104S, 1.2 parts of leveling agent BYK203, 1 part of titanium dioxide, 4.5 parts of dewatering agent 3A activation powder were added to...

specific Embodiment 3

[0043] A fast-curing high-adhesion rigid polyurea is a two-component component, and the mass percentages of the raw materials of component A and component B are as follows:

[0044] Preparation of component A: 40 parts of polyoxypropylene glycol PPG1000, 110~120°C, vacuum -0.08~-0.1MPa, stirring and dehydrating for 2~3 hours, after removing the vacuum, cool down to below 60°C and add 45 parts of MDI- 50,15 parts of MDI-100LL are heated to 80-90°C and kept for 2-3 hours, then cooled and added with 5 parts of coupling agent KH560, stirred evenly and discharged. Preparation of component B: 20 ​​parts of DETDA, 35 parts of polytetrahydrofuran polyol, 25 parts of 4,4-bis-sec-butylaminodiphenylmethane, 0.3 parts of dibutyltin dilaurate, 1 part of antioxidant 1010, 1 part Add UV-531, 1 part of wetting and dispersing agent BYK2008, 1.2 parts of leveling agent BYK110, 1 part of titanium dioxide, and 4.5 parts of dewatering agent 3A activation powder into the pulling tank, disperse at h...

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Abstract

The invention belongs to a rigid spray polyurea protective material for steel structure anticorrosion and discloses rapidly cured rigid polyurea with high adhesion. The rapidly cured polyurea comprises double components, wherein the component A comprises raw materials in percentage by mass as follows: 50%-70% of isocyanate, 30%-40% of polyether polyol and 6%-10% of auxiliaries; the component B comprises raw materials in percentage by mass as follows: 20%-40% of a chain extender, 30%-60% of polyether polyol, 0-0.5% of a catalyst, 0-1% of color paste, 0-10% of pigments and filler and 0-10% of auxiliaries. The rigid polyurea improves the defects of cracks and high brittleness of a polyurea coating with high NCO content, has higher impact resistance and belongs to rapidly cured and quick-drying type polyurea materials, the construction period can be shortened, and the construction efficiency can be improved effectively. The crosslinking density and the rigidity of polyurea are improved, the adhesion of polyurea on a steel stature reaches 15 MPa, the cathodic disbanding diameter is smaller than 3 mm, the polyurea is applicable to various working condition environments due to high performance, and the application field is broadened.

Description

technical field [0001] The invention belongs to the anti-corrosion rigid spray polyurea protective material for steel structure, and relates to the rigid polyurea material. Background technique [0002] In petroleum, chemical industry, pipeline, ocean engineering and other anti-corrosion fields, most equipment, pipelines and platforms are in contact with chemical media, atmosphere, sea water, soil and other corrosive media to cause chemical or electrochemical damage. The concentration of corrosive medium and the ambient temperature are erratic, so steel structure equipment, pipelines, platforms, etc. will be corroded to varying degrees. Separate materials from corrosive media, such as non-metallic coatings, linings, temporary protective materials, etc., to prevent wear and corrosion of equipment and prolong service life. [0003] Traditional non-metallic coatings such as epoxy, polyurethane, chlorinated rubber, engineering plastics, and polyolefin compounds have good protec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C08G18/76C08G18/67C08G18/66C08G18/48C08G18/32
CPCC09D175/02C08G18/3243C08G18/3814C08G18/4804C08G18/4808C08G18/4825C08G18/4854C08G18/6685C08G18/6696C08G18/721C08G18/7664C08G18/7671
Inventor 孙世刚张勇张传伟李同信常友
Owner 大连怿文新材料科技发展有限公司
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