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Underwater anti-impact coating with rapid curing function

A fast-curing, impact-resistant technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems that are not related to underwater structures and ship applications, are not suitable for large-scale promotion and application, and graphene increases the cost. To shorten the gel time, extend the time, improve the effect of tear resistance and tensile strength

Active Publication Date: 2017-12-29
CHENGDU XINJIN TUOZHAN PRINTING INK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the performance is improved by adding fillers, and the additive fillers are prone to phase separation with the polymer chain segment during use, resulting in a downward trend in the physical properties of the material.
CN201611082325.4 involves using graphene slurry to improve the physical properties of coatings in the explosion-proof impact polyurea. Although the tear strength and impact resistance are improved, expensive graphene increases the cost of the product and is not suitable for large-scale Promote application
[0004] The above two coatings are not related to the application of underwater structures and ships

Method used

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  • Underwater anti-impact coating with rapid curing function
  • Underwater anti-impact coating with rapid curing function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Fast-curing underwater impact-resistant coatings:

[0038] Prepare component A:

[0039] Take 100kg of polyoxypropylene ether glycol with a molecular weight of 1000, place it in a container with stirring, heating and vacuum, raise the temperature to 120°C under stirring, start vacuum dehydration at -0.095MPa, and maintain the temperature and pressure for 2 hours Finally, the pressure is released, the temperature drops below 60°C, and 126kg of MDI50 is added dropwise, and the temperature is kept below 60°C during the dropwise addition. After the dropwise addition, raise the temperature to 90~95°C and keep it for 2 hours, then lower the temperature, vacuumize and remove air bubbles, and then pack into barrels. The NCO content of this prepolymer is 15%.

[0040] Prepare B component:

[0041] 61.3kg amino-terminated polyether D2000, 5kg amino-terminated polyether T403, 3.9kg amino-terminated polyether D400, 14kg liquid chain extender E100, 10kg liquid chain extender UNIL...

Embodiment 2

[0044] Prepare component A:

[0045]Take 90kg of polyoxypropylene ether glycol with a molecular weight of 2000 and 10kg of hydroxyl-terminated polybutadiene with a molecular weight of 1650 in a container with stirring, heating and vacuum, and raise the temperature to 110~120°C under stirring, and start at - Vacuum dehydration at 0.095MPa, maintain the temperature and pressure for 1~2 hours, release the pressure, the temperature drops below 60°C, add 143kg of MDI50 dropwise, and keep the temperature not exceeding 60°C during the dropping process. After the dropwise addition, raise the temperature to 90~100°C and keep it for 2 hours, then cool down, vacuumize and remove air bubbles, and then pack into barrels. The NCO content of this prepolymer is 18%.

[0046] Prepare B component:

[0047] 44.3kg of amino-terminated polyether D2000, 5.1kg of amino-terminated polyether T403, 30kg of liquid chain extender E300, 15.1kg of liquid chain extender UNILINK4200 and N-methyl-N 2 – Add...

Embodiment 3

[0050] Prepare component A:

[0051] Take 100kg of polytetrahydrofuran ether glycol with a molecular weight of 2000 in a container with stirring, heating and vacuum, raise the temperature to 115~120°C under stirring, start vacuum dehydration at -0.095MPa, and maintain the temperature and pressure for 1~2 Hours later, the pressure was released, the temperature dropped below 60°C, and 124.6kg of diphenylmethane-4,4 was added dropwise ， -Diisocyanate and 53.4kg diphenylmethane-2,4 ， - a mixture of diisocyanates, the temperature of which does not exceed 60°C during the dropwise addition. After the dropwise addition, raise the temperature to 90~100°C and keep it for 2 hours, then cool down, vacuumize and remove air bubbles, and then pack into barrels. The NCO content of this prepolymer is 20%.

[0052] Prepare B component:

[0053] 43.97kg amino-terminated polyether D2000, 3kg amino-terminated polyether T403, 4kg amino-terminated polyether D400, 26.9kg liquid chain extender E10...

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Abstract

Aiming at underwater structures (such as underwater cave depots) and ships, the invention provides an underwater anti-impact coating with a rapid curing function. The underwater anti-impact coating with the rapid curing function comprises a component A and a component B, wherein the component A is prepared through steps as follows: polyether polyol is heated to 120 DEG C, subjected to vacuum dehydration and cooled to the room temperature, the measured amount of isocyanate is dropwise added, a reaction is performed at the temperature of 80-120 DEG C, vacuum degassing is performed, and a product is cooled to the room temperature, barreled and sealed; the component B is prepared through steps as follows: amine-terminated polyether, a diamine chain extender, a pentaerythrityl tetramine derivative and an auxiliary are mixed uniformly, filler is added for grinding, and all components are stirred uniformly. The prepared anti-impact coating can be cured in 5-15 s and is waterproof and aging-resistant, particularly, an attached substance is endowed with excellent anti-impact capacity, and after spraying of the anti-impact coating, the anti-impact capacity of the cave depots and the ships to underwater explosives is greatly enhanced.

Description

technical field [0001] The invention relates to a fast-curing underwater impact-resistant paint for underwater structures and ships. Background technique [0002] Spray polyurea is a new type of fast-curing two-component coating, 100% solid, free of volatile organic compounds, can be applied on any curved surface, vertical surface or even the ceiling without sagging, and has excellent properties after curing. Physical properties, such as tensile strength, elongation at break, tear resistance, wear resistance, etc. In my country, after the introduction of polyurea, it is mainly used in the fields of building waterproofing, wear-resistant lining, and pipeline anticorrosion. Polyurea can also be used in building anti-shock, armor lining, shields, helmets and so on. Due to the high elasticity of polyurea, after it is sprayed on rigid materials such as buildings, armor, shields, etc., it can effectively absorb impact energy, reduce the impact on rigid materials, and effectively...

Claims

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Application Information

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IPC IPC(8): C09D175/08C08G18/32C08G18/48C08G18/66C08G18/76C08G18/69
CPCC08G18/3228C08G18/4804C08G18/4808C08G18/4825C08G18/4854C08G18/6674C08G18/698C08G18/7671C09D175/08
Inventor 付勇王旭鹏张海广
Owner CHENGDU XINJIN TUOZHAN PRINTING INK
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